IQ Switch®
ProxSense® Series
IQS213A Datasheet
IQSwitch® - ProxSense® Series
3-Channel Capacitive Touch/Swipe Function Controller
Overview
Unparalleled Features
Sub 5µA* current consumption (“Zero-Power” electronic switch).
Internal Capacitor Implementation (ICI) – Reference capacitor on-chip
Automatic Tuning Implementation (ATI) - Automatic tuning for optimal operation in various
environments & compensation against sensitivity reducing objects
IQS213A advised for applications with high load-capacitances and high sensitivity
requirements.
The IQS213A ProxSense® IC is a fully integrated two or three channel capacitive swipe function
sensor with market leading sensitivity and automatic tuning of the sense electrodes. The IQS213A
provides a minimalist implementation requiring few external components, with OTP-option settings
(Stand-Alone mode) and programmable I2C-compatible interface, which allow configuration for
numerous applications.
Main Features
2 or 3 Channel (Projected- or Self-Capacitance) Input device
Swipe Function or Individual (Normal) Touch Electrode Implementation
Variable User Interface with Adjustable Swipe Function Configuration
Auto-Off and Advanced Auto-Off Warning Function
Supply voltage: 1.8V to 3.6V
Internal voltage regulator and reference capacitor
Advanced on-chip digital signal processing
OTP (One Time Programmable) options available
2
Stand-Alone GPIO Output (Default) / I C-compatible interface
Low Power Modes (sub 4µA*)
Variable Proximity & Touch Thresholds
Small outline MSOP-10 package
Applications
Sanitary ware, toys, office equipment
Flashlights, headlamps, keychain lights
Splash- / waterproof devices
Swipe-to-Unlock / Wake from Standby applications
Replacement for electro-mechanical switches
Advantages
Prevents accidental activation of conventional touch sensors
Improved digital filtering to reduce external noise
High immunity against aqueous substances
2
Highly adjustable device with continuous data or event driven I C communication
Available options
TA
MSOP10
-20°C to 85°C
IQS213A
*Current consumption dependant on selected Low Power settings.
Copyright © Azoteq (Pty) Ltd 2018
All Rights Reserved
IQS213A Datasheet
Revision 3.0
Page 1 of 48
October 2018
IQ Switch®
ProxSense® Series
Contents
8.6
8.7
8.8
8.9
8.10
OVERVIEW ................................................................ 1
CONTENTS ................................................................. 2
1
FUNCTIONAL OVERVIEW .................................. 3
1.1
APPLICABILITY ............................................... 3
2
ANALOGUE FUNCTIONALITY............................. 3
3
DIGITAL FUNCTIONALITY .................................. 3
4
HARDWARE CONFIGURATION .......................... 4
5
10
EVENT MODE .............................................. 30
2
I C SPECIFIC COMMANDS.............................. 30
2
I C READ AND W RITE SPECIFICS ................... 30
IQS213A MEMORY MAP ..................................31
USER CONFIGURABLE OPTIONS ........................ 7
11 ELECTRICAL SPECIFICATIONS – ALL
PRELIMINARY ..........................................................41
11.1
ABSOLUTE MAXIMUM SPECIFICATIONS ........... 41
11.2
GENERAL CHARACTERISTICS (MEASURED AT
25°C) 41
TABLE 11.1 IQS213A GENERAL OPERATING CONDITIONS
(A )
41
TABLE 11.2 IQS213A CURRENT CONSUMPTION (B)..... 42
TABLE 11.3 IQS213A CURRENT CONSUMPTION (C) .... 42
TABLE 11.4 IQS213A CURRENT CONSUMPTION (D) .... 42
TABLE 11.5 START-UP AND SHUT-DOWN SLOPE
CHARACTERISTICS .................................................... 43
TABLE 11.6 DEBOUNCE EMPLOYED ON IQS213A ........ 43
11.3
TIMING CHARACTERISTICS ............................ 43
1
TABLE 11.7 MAIN OSCILLATOR ................................. 43
TABLE 11.8 GENERAL TIMING CHARACTERISTICS FOR
1.80V ≤ VDDHI ≤ 3.60V ............................................. 43
TABLE 11.9 IQS213A CHARGING TIMES ..................... 43
DESCRIPTION OF USER SELECTABLE OPTIONS. 18
12
PACKAGING INFORMATION ............................44
MSOP-10 PCB FOOTPRINT DIMENSIONS: .................. 44
12.1
TAPE AND REEL SPECIFICATION .................... 45
12.2
PACKAGE MSL ............................................ 45
TABLE 12.1 MSOP-10 MSL CLASSIFICATION .............. 45
13
DEVICE MARKING ............................................46
13.1
13.2
14
ORDERING INFORMATION ..............................47
14.1
15
TOP MARKING .............................................. 46
BOTTOM MARKING ....................................... 46
GENERAL PART ORDER NUMBER .................. 47
CONTACT INFORMATION ................................48
ADDITIONAL FEATURES .................................. 24
7.1
8
9.1
9.2
9.3
10.1
MEMORY REGISTERS ................................... 31
TABLE 10.1 : IQS213A MEMORY REGISTERS.............. 31
TABLE 10.2 : IQS213A MEMORY REGISTER BITS ........ 33
10.2
MEMORY REGISTERS DESCRIPTION ............... 33
6.1
IQS213A IC TYPE ...................................... 18
6.2
SELF- / PROJECTED CAPACITANCE ................ 18
6.3
FLOAT RX ................................................... 19
6.4
OUTPUT LOGIC SELECT ................................ 19
6.5
HALT TIME .................................................. 20
6.6
LOW POWER MODES ................................... 20
TABLE 6.1 : LOW POWER MODE TIMING (TLP) .............. 21
6.7
PROXIMITY THRESHOLD ............................... 21
6.8
TOUCH THRESHOLDS ................................... 21
6.9
IQS213A SWIPE UI .................................. 22
6.10
ZERO STATES ALLOWED .............................. 22
6.11
END ON ZERO STATE ................................... 22
6.12
STATE TIMES .............................................. 22
6.13
TOUCH/SWIPE (PIN7) OUTPUT ...................... 23
6.14
AC FILTER .................................................. 23
6.15
ATI METHOD............................................... 23
6.16
BASE VALUE ............................................... 23
6.17
ATI TARGET VALUE ..................................... 23
6.18
AUTO-OFF / ADVANCED AUTO-OFF W ARNING 24
2
6.19
I C DEBUG ................................................. 24
7
COMMUNICATION ..........................................30
4.1
IQS213A - MSOP10 PIN-OUT ...................... 4
TABLE 4.1 : IQS213A PIN-OUT .................................... 4
4.2
REFERENCE DESIGN (IQS213A, SELFCAPACITANCE, ACTIVE-LOW OUTPUT) .......................... 5
5.1
CONFIGURING OF DEVICES ............................. 7
5.2
USER SELECTABLE CONFIGURATION (OTP)
OPTIONS.................................................................... 8
TABLE 5.1 .................................................................. 8
TABLE 5.2 .................................................................. 9
TABLE 5.3 ................................................................ 10
TABLE 5.4 ................................................................ 11
TABLE 5.5 ................................................................ 12
TABLE 5.6 ................................................................ 13
5.3
IQS213A SETUP EXAMPLES ........................ 14
6
9
ACTIVE CHANNELS ....................................... 27
LONG TERM AVERAGE (LTA) ........................ 28
DETERMINE TOUCH OR PROX ........................ 28
ATI ............................................................ 28
RF DETECTION ............................................ 29
NOISE DETECTION ....................................... 24
®
PROXSENSE MODULE .................................... 26
8.1
8.2
8.3
8.4
8.5
CHARGE TRANSFER CONCEPTS .................... 26
®
PROXSENSE MODULE SETUP ...................... 26
SELF- OR PROJECTED CAPACITANCE ............. 26
RATE OF CHARGE CYCLES ........................... 27
TOUCH REPORT RATE.................................. 27
Copyright © Azoteq (Pty) Ltd 2018
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IQS213A Datasheet
Revision 3.0
Page 2 of 48
October 2018
IQ Switch®
1 Functional Overview
ProxSense® Series
The IQS213A is a two or three channel
capacitive proximity and touch sensor with
variable swipe function configurations.
Additional features include internal voltage
regulation and reference capacitor (CS),
which enables cost efficient and minimal
component designs.
The device offers
flexible design approaches by allowing the
connection of two or three sense antennas in
either surface or projected capacitance
configurations.
For swipe function applications the device
has a single logic output to indicate swipe
actions and one complementary output for
consecutive swipe/touch activities.
The
device can also be configured to operate with
individual touch outputs, with an additional
proximity output when implementing surface
capacitance sense electrodes.
Full control by a master device is achieved by
configuring the logic outputs in a serial data
(I2C) communication option on TO0 (SCL),
TO1 (SDA) and TO2 (RDY).
Note: Programming of OTP’s required to
2
enable I C operation.
The device automatically tracks slow varying
environmental changes via various filters,
detects noise and has an Automatic Tuning
Implementation (ATI) to tune the device for
optimal sensitivity.
1.1 Applicability
All specifications, except where specifically
mentioned otherwise, provided by this
datasheet are applicable to the following
ranges:
Temperature: -20°C to +85°C
Supply voltage (VDDHI): 1.8V to 3.6V
2 Analogue Functionality
attached to the CX pins through a charge
transfer process that is periodically initiated
by the digital circuitry. For projectedcapacitance configurations the capacitance is
measured between the transmit (TX) and
receive (CRX) pins. The measuring process
is referred to as a conversion and consists of
the discharging of CS and CX, the charging of
CX and then a series of charge transfers from
CX to CS until a trip voltage is reached. The
number of charge transfers required to reach
the trip voltage is referred to as the Count
(CS) Value.
The capacitance measurement circuitry
makes use of an internal CS and voltage
reference (VREG).
The analogue circuitry further provides
functionality for:
Power on reset (POR) detection.
Brown out detection (BOD).
3 Digital Functionality
The digital processing
responsible for:
functionality
is
Device setup from OTP settings after
POR.
Management of BOD and WDT
events.
Initiation of conversions at the
selected rate.
Processing of CS and execution of
algorithms.
Monitoring and automatic execution of
the ATI algorithm.
Signal processing and digital filtering.
Detection of PROX and TOUCH
events.
Managing outputs of the device.
Managing serial communications.
Manage
programming
of
OTP
options.
For self-capacitance configured sense
electrodes the analogue circuitry measures
the capacitance of the sense antennas
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IQS213A Datasheet
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Page 3 of 48
October 2018
IQ Switch®
ProxSense® Series
4 Hardware Configuration
4.1
IQS213A - MSOP10 Pin-Out
IQS213A
Figure 4.1 : Pin-out of IQS213A MSOP-10 package
Table 4.1 : IQS213A Pin-out
5
VREG
IQS213A Pin-out
Type
Function
Supply Input
Ground Reference
Analogue
Sense Electrode 0
Analogue
Sense Electrode 1
Supply Input
Supply Voltage Input
Internal Regulator Pin (Connect 1µF
Analogue Output
6
SWIPE/TO2/RDY
Digital Output
7
PULSE/T01/SDA
Digital Output
8
AAOW/TO0/SCL
Digital I/O
9
CX2 (CRX2)
10
PO/TX
Analogue
Digital Output
Transmitter
Pin
1
2
3
4
Name
GND
CX0 (CRX0)
CX1 (CRX1)
VDDHI
Copyright © Azoteq (Pty) Ltd 2018
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bypass capacitor)
Swipe Output/Touch Output/I2C:
RDY Output
Pulse Output/Touch Output/I2C:
SDA Output
Auto-Off Warning/Touch
Output/I2C: SCL Input
Sense Electrode 2
/ Proximity Output/ Projected Sense
Electrode
IQS213A Datasheet
Revision 3.0
Page 4 of 48
October 2018
IQ Switch®
ProxSense® Series
4.2 Reference Design (IQS213A, Self-Capacitance, Active-Low Output)
Figure 4.2 : IQS213A Reference Design (Self-Capacitance, Active-Low)
Note: For Active-Low configurations the external pull-up resistors (i.e. R8-R10) must be
populated for correct functioning of the relevant Open-Drain (SW-OD) outputs. Resistor
R11 should only be placed for a “Self-Capacitive” system when using the Active-Low
(SW-OD) proximity output (pin10).
R12: Place a 43Ω resistor in series with the VDDHI supply line to prevent a potential
ESD induced latch-up state. Maximum supply current should be limited to 80mA on the
IQS213A VDDHI pin to prevent latch-up.
4.2.2 Power Supply and PCB Layout
Azoteq IC's provide a high level of on-chip hardware and software noise filtering and ESD
protection (refer to application note “AZD013 – ESD Overview”). Designing PCB's with better
noise immunity against EMI, FTB and ESD in mind, it is always advisable to keep the critical noise
suppression components like the de-coupling capacitors and series resistors in Figure 4.2 as close
as possible to the IC. Always maintain a good ground connection and ground pour underneath the
IC.
For more guidelines please refer to the relevant application notes as mentioned in Section 4.2.3.
Copyright © Azoteq (Pty) Ltd 2018
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IQS213A Datasheet
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October 2018
IQ Switch®
ProxSense® Series
4.2.3 Design Rules for Harsh EMC Environments
Figure 4.3 : EMC Design Rules
Applicable application notes: AZD013, AZD015, AZD051, AZD052.
4.2.4 High Sensitivity
Through patented design and advanced signal processing, the device is able to provide
extremely high sensitivity to detect proximity. This enables designs to detect proximity at
distances that cannot be equaled by most other products. When the device is used in
environments where high levels of noise exist, a reduced proximity threshold is proposed to
ensure reliable functioning of the sensor.
When the capacitance between the sense antenna and ground becomes too large the
sensitivity of the device may be influenced. For more guidelines on layout, please refer to
application note AZD008, available on the Azoteq web page: www.azoteq.com.
Copyright © Azoteq (Pty) Ltd 2018
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IQS213A Datasheet
Revision 3.0
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October 2018
IQ Switch®
ProxSense® Series
5 User Configurable Options
The IQS213A provides One Time Programmable (OTP) user options, which can be programmed
to change the device’s default start-up configuration. Blank/Un-programmed devices has a default
OTP configuration = 00000000 (See Section 5.2 for OTP options).
With the use of Azoteq’s IQS213A GUI software, the IQS213A can enter streaming mode in a
start-up state (Test Mode) where the OTP options can be configured and evaluated, before
selecting OTP’s for programming.
NOTE: I2C-communication is NOT ENABLED by Default, and the device will be in a Stand-Alone
mode configuration with GPIO outputs. To enable I2C-communication, the I2C-debug option in
OTP bank 4 has to be programmed.
The configuration of the device can be done on packaged devices or in-circuit. In-circuit
configuration may be limited by the type and/or values of external components chosen.
Please see Section 5.3 for IQS213A device setup and output configuration examples.
5.1 Configuring of Devices
Azoteq offers a Configuration Tool (CT210 or later) and associated software (USBProg.exe) that
can be used to program the OTP user options for prototyping purposes. More details regarding the
configuration of the device with the USBProg program can be found in "AZD007 - USBProg
Overview" available on the Azoteq website.
For further enquiries regarding this subject, please contact your local distributor or submit enquiries
to Azoteq at: ProxSenseSupport@azoteq.com
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IQS213A Datasheet
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October 2018
IQ Switch®
ProxSense® Series
5.2 User Selectable Configuration (OTP) Options
Table 5.1 : User Selectable Configuration (OTP) Options : Bank 0
bit7
THALT1
Bank 0
THALT0
Bank0: bit7:6
LOGIC
FLOAT RX
bit0
PROJ
IC TYPE2
IC TYPE1
THALT1:THALT0: LTA Halt Time
IC TYPE0
Section 6.5
00 = 2.5s
01 = 20s
10 = 60s
11 = Never
Bank0: bit5
LOGIC: Output Logic
Section 6.4
1
0 = Active Low
1 = Active High
Bank0: bit4
FLOAT RX: Float Sense Electrodes
Section 6.8
0 = No
1 = Yes
Bank0: bit3
PROJ: Capacitive Technology
Section 6.2
0 = Self Capacitance
1 = Projected Capacitance
Bank0: bit2:0
1
IC TYPE: Select IC type
Section 6.1
000 = 1zz 12z z2z
- 2CH SWIPE
001 = 1zz x2x zz3
- 3CH SWIPE (Thresholds * 2)
010 = 1zz z2z zz3
- 3CH SWIPE
011 = 1zz 12z z2z z23 zz3
- 3CH SWIPE
100 = 2CH Normal
- 2 Channel Touch Sensor
101 = 3CH Normal
- 3 Channel Touch Sensor
110 = 1zz 1xz x2x zx3 zz3
- 3CH SWIPE
111 = 1zz, x2x, zz3
- 3CH SWIPE
Active Low configurations are software open-drain (SW OD).
Note: The proximity output on the PO/TX-pin (pin 10) is multiplexed with the transmit signal (TX)
for projected capacitance electrodes, and is Active High ONLY for Projected configurations.
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IQS213A Datasheet
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October 2018
IQ Switch®
ProxSense® Series
Table 5.2 : User Selectable Configuration (OTP) Options : Bank 1
bit7
CH2 TTH1
Bank 1
CH2 TTH0
Bank1: bit7:6
CH1, CH3
TTH1
PTH DIV
LP1
LP0
Section 6.8
TTH ALT = 1
00 = 4
00 = 22
01 = 8
01 = 28
10 = 12
10 = 36
11 = 16
11 = 48
CH1, CH3 TTH: Ch 1 & Ch 3 Touch Threshold
TTH ALT = 0
Bank1: bit3
TTH ALT
CH2 TTH1:CH2 TTH0: Channel 2 Touch Threshold
TTH ALT = 0
Bank1: bit5:bit4
CH1, CH3
TTH0
bit0
Section 6.8
TTH ALT = 1
00 = 4
00 = 22
01 = 8
01 = 28
10 = 12
10 = 36
11 = 16
11 = 48
TTH ALT: Alternative Touch Thresholds
Section 6.8
0 = No
1 = Yes
Bank1: bit2
PTH: Proximity Threshold Selection
Section 6.7
0 = 3 Counts
1 = 8 Counts
Bank1: bit1:0
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LP1:LP0: Low Power Selection
00 = NP
- Normal Power
01 = 128ms
- Low Power Mode 1
10 = 256ms
- Low Power Mode 2
11 = 512ms
- Low Power Mode 3
IQS213A Datasheet
Revision 3.0
Section 6.6
Page 9 of 48
October 2018
IQ Switch®
ProxSense® Series
Table 5.3 : User Selectable Configuration (OTP) Options : Bank 2
bit7
ACF
Bank 2: SWIPE IC
Pin7_OUT
Bank2: bit7
CHG_FRQ
Min_State
Zero_End
bit0
Zero_State
SWIPE UI1
ACF: AC Filter Selection
SWIPE UI0
Section 6.14
0 = Disabled
1 = Enabled
Bank2: bit6
Pin7_OUT: SWIPE IC Pin 7 Output Selection
Section 6.13
0 = Touch
1 = Pulse
Bank2: bit5
Bank2: bit4
CHG_FRQ: Charge Transfer Frequency
0 = 0.5MHz / 1.0MHz
(Self - / Projected Capacitance)
1 = 1.0MHz / 2.0 MHz
(Self - / Projected Capacitance)
Min_State: Minimum State Time
Section 8.3
Section 6.12
0 = 1 Sample
1 = 2 Samples
Bank2: bit3
Zero_End: End Swipe on Zero State (zzz)
Section 6.11
0 = Disabled
1 = Enabled
Bank2: bit 2
Zero_State: Allow Zero States In Swipe Sequence
Section 6.10
0 = Disabled
1 = Enabled
Bank2: bit 1:bit0
SWIPE UI1: SWIPE UI0: Swipe UI Selection
Section 6.9
00 = Single Direction
01 = Bi-Directional
10 = Directional
11 = Dual Swipe
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IQS213A Datasheet
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IQ Switch®
ProxSense® Series
Table 5.4 : User Selectable Configuration (OTP) Options : Bank 2
bit7
ACF
Bank2: bit7
Bank 2: Normal Touch IC
CHG_FRQ
bit0
Toggle
CH3
ACF: AC Filter Selection
Toggle
CH2
Toggle
CH1
Section 6.14
0 = Disabled
1 = Enabled
Bank2: bit6
Bank2: bit5
CHG_FRQ: Charge Transfer Frequency
Section 8.3
0 = 0.5MHz / 1.0MHz
(Self - / Projected Capacitance)
1 = 1.0MHz / 2.0 MHz
(Self - / Projected Capacitance)
Bank2: bit4
Bank2: bit3
Bank2: bit 2
Toggle CH3: Channel 3 Touch Output = Toggle
0 = Disabled
1 = Enabled
Bank2: bit 1
Toggle CH2: Channel 2 Touch Output = Toggle
0 = Disabled
1 = Enabled
Bank2: bit 0
Toggle CH1: Channel 1 Touch Output = Toggle
0 = Disabled
1 = Enabled
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IQS213A Datasheet
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October 2018
IQ Switch®
ProxSense® Series
Table 5.5 : User Selectable Configuration (OTP) Options : Bank 3
bit7
Bank 3
AAO_CLR
Bank3: bit7
System Use
Bank3: bit6
System Use
Bank3: bit5
System Use
Bank3: bit4
System Use
Bank3: bit3
AAO_CLR: Clear Auto-Off Timer On Event
bit0
AAO
ATI_Target
ATI_Base
Section 6.18
0 = Touch Event
1 = Proximity Event
Bank3: bit 2
AAO: Advanced Auto-Off Function Selection
Section 6.18
0 = Enabled
1 = Disabled
Bank3: bit 1
Bank3: bit 0
ATI_Target: ATI Target Value
Proximity
Touch
0=
320
160
1=
640
320
ATI_Base: ATI Base Value (All Channels)
Section 6.17
Section 6.16
0 = 75
1 = 100
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IQS213A Datasheet
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October 2018
IQ Switch®
ProxSense® Series
Table 5.6 : User Selectable Configuration (OTP) Options : Bank 4
bit7
Bank 4
bit0
2
I C Debug
Bank4: bit7
System Use
Bank4: bit6
System Use
Bank4: bit5
System Use
Bank4: bit4
System Use
Bank4: bit3
I C Debug: I C Interface (Default = Event-Mode)
2
2
Section 6.19
0 = Disabled
1 = Enabled
Bank4: bit 2
System Use
Bank4: bit 1
System Use
Bank4: bit 0
System Use
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IQS213A Datasheet
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October 2018
IQ Switch®
ProxSense® Series
5.3 IQS213A Setup Examples
5.3.1 Example 1: 3-Channel Self Capacitive, Active Low Logic Output, SwipeSwitch
with Auxiliary Touch Output.
Example 1 (see Figure 5.1) illustrates the user interface (UI) and device outputs for a 3-Channel
Self Capacitive SwipeSwitch (output on pin 6), in an active low configuration with the Directional
UI and Auxiliary Touch Output on pin 7.
5.3.1.1 Selected User Configuration Options (Example 1):
bit7
THALT1
0
THALT0
0
LOGIC
0
Bank 0
FLOAT RX
N/A
PROJ
0
IC TYPE2
*
IC TYPE1
*
bit0
IC TYPE0
*
*** The IC TYPE can be any 3-Channel SwipeSwitch™ option, e.g. 001,110 or 111.
THALT1:0 = 00 – 2.5s Halt time selected for this example.
bit7
CH2 TTH1
CH2 TTH0
N/A
N/A
bit7
ACF
N/A
Pin7_OUT
0
bit7
CH1, CH3
TTH1
N/A
CHG_FRQ
N/A
Bank 1
CH1, CH3
TTH0
N/A
bit0
TTH ALT
PTH DIV
LP1
LP0
N/A
N/A
N/A
N/A
Bank 2: SWIPE IC
Min_State
N/A
Zero_End
N/A
Zero_State
N/A
Bank 4
2
I C Debug
0
SWIPE UI1
1
bit0
SWIPE UI0
0
bit0
5.3.1.2 Device outputs (Directional SwipeSwitch™ UI)
Figure 5.1 : IQS213A setup example 1
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IQS213A Datasheet
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October 2018
IQ Switch®
ProxSense® Series
5.3.2 Example 2: 3-Channel Projected Capacitive, Active High Logic Output,
SwipeSwitch with Auxiliary Swipe Pulse Output.
Example 2 (see Figure 5.2) illustrates the user interface (UI) and device outputs for a 3-Channel
Projected Capacitive SwipeSwitch (output on pin 6), in an active high configuration with the BiDirectional UI and Auxiliary Swipe Pulse Output on pin 7.
5.3.2.1 Selected User Configuration Options (Example 2):
bit7
THALT1
N/A
THALT0
N/A
Bank 0
LOGIC
1
FLOAT RX
N/A
CH1, CH3
TTH0
N/A
Min_State
N/A
PROJ
1
IC TYPE2
*
IC TYPE1
*
bit0
*** The IC TYPE can be any 3-Channel SwipeSwitch option, e.g. 001,110 or 111.
bit7
CH2 TTH1
CH2 TTH0
N/A
N/A
CH1, CH3
TTH1
N/A
Pin7_OUT
1
CHG_FRQ
N/A
bit7
ACF
N/A
Bank 1
IC TYPE0
*
bit0
TTH ALT
PTH DIV
LP1
LP0
N/A
N/A
N/A
N/A
Zero_State
N/A
SWIPE UI1
0
SWIPE UI0
1
Bank 2: SWIPE IC
Zero_End
N/A
bit0
Pin7_OUT = 1 : The output on pin 7 will be a pulse signal *(within a 2-second window), of
which the pulse length depends on the direction of the swipe event. See Section 6.13.
*The 2-second window is reset after each swipe event.
bit7
Bank 4
2
I C Debug
0
bit0
5.3.2.2 Device outputs (Bi-Directional SwipeSwitch UI)
Figure 5.2 : IQS213A Setup example 2
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IQS213A Datasheet
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October 2018
IQ Switch®
ProxSense® Series
5.3.3 Example 3: Normal Mode Operation
Example 3 illustrates the user interface (UI) and device outputs for a 2- or 3-Channel Normal
Mode (TOUCH) Device, with optional toggle state outputs. Note that the lower three bits of Bank2
are reserved for Toggle options, when the IC TYPE is selected in a Normal Mode configuration.
The Normal Mode (i.e Touch) device can be either Self- or Projected Capacitive with either Active
High or Active Low (Logic) outputs.
5.3.3.1 Example 3.1: 2-Channel Normal Mode – No Toggle Active, Active Low Logic
bit7
THALT1
N/A
THALT0
N/A
LOGIC
0
bit7
Bank 0
FLOAT RX
N/A
PROJ
N/A
Bank 2: Normal Touch IC
ACF
CHG_FRQ
N/A
N/A
bit0
IC TYPE2
1
IC TYPE1
0
IC TYPE0
0
Toggle
CH3
0
Toggle
CH2
0
Toggle
CH1
0
bit0
Figure 5.3 : IQS213A Setup example 3.1
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IQ Switch®
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5.3.3.2 Example 3.2: 3-Channel Normal Mode – All Toggles Active, Active High Logic
bit7
THALT1
N/A
THALT0
N/A
LOGIC
1
bit7
Bank 0
FLOAT RX
N/A
PROJ
N/A
Bank 2: Normal Touch IC
ACF
CHG_FRQ
N/A
N/A
bit0
IC TYPE2
1
IC TYPE1
0
IC TYPE0
1
Toggle
CH3
1
Toggle
CH2
1
Toggle
CH1
1
bit0
Figure 5.4 : IQS213A Setup example 3.2
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IQS213A Datasheet
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IQ Switch®
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6 Description
of
Selectable Options
User
This section briefly describes the individual
user programmable options of the IQS213A,
with additional information and detailed
descriptions being provided in Section 8.
Thresholds and other settings can also be
evaluated in Test Mode streaming without
programming the OTP options. For the
appropriate
software,
please
visit:
www.azoteq.com
6.1 IQS213A IC Type
The IQS213A has six selectable SwipeSwitch™ setup configurations, allowing the
user maximum freedom in the design of the
intended application. The device type
configuration specifies the required user
input, which is identified by a sequence of a
combination of input states, where a [number]
(e.g. 1, 2 or 3) indicates a touch
condition/state on that specific channel, a [zcharacter] indicates a zero condition/state
and a [x-character] indicates a “don't care”
condition/state (i.e. a number or zero
condition is acceptable). The input states
related to sequences accepting x-character
conditions are also referred to as relaxed
states.
2CH SWIPE - 1zz 12z z2z
2-Channel swipe switch operation.
:
3CH SWIPE – 1zz x2x zz3 (TH*2)
3-Channel swipe switch operation.
:
3CH SWIPE - 1zz z2z zz3
3-Channel swipe switch operation.
:
3CH SWIPE - 1zz 12z z2z z23 zz3 :
3-Channel swipe switch operation.
3CH SWIPE - 1zz 1xz x2x zx3 zz3 :
3-Channel swipe with relaxed states.
3CH SWIPE - 1zz x2x zz3
:
3-Channel swipe with relaxed states.
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The IQS213A also has 2 selectable normal
setup configurations, which allows the user to
implement standard touch and proximity
sensing features.
2CH Normal Mode
:
2-Channel Normal Touch operation.
3CH Normal Mode
:
3-Channel Normal Touch operation.
With the device setup in either 2-channel or
3-channel Normal Mode, touch events
corresponding to the different sense
electrodes will be output on TO0 (pin 8), TO1
(pin 7) and TO2 (pin 6), with a proximity
output available on PO (pin 10).
During Normal Mode operation, setting the
different “Toggle_CHx” bits in Bank 2, will
enable the touch output signals to toggle.
6.2 Self- / Projected Capacitance
Enabling the projected capacitance option,
will cause the measurement of the sense
electrode capacitance between the transmit
(TX) and receive (CRX) pins.
The proximity output on the PO/TX-pin (pin
10) is multiplexed with the transmit signal
(TX) for projected capacitance electrodes,
and is Active High ONLY for such
configurations.
The
implementation
of
a
projected
capacitance sense electrode will result in a
higher charge frequency (i.e. f Cm = 1MHz)
compared to that of a self capacitance
configuration (i.e. fCs= 500kHz). Setting bit5 in
Bank2 will double the charge frequency for
both projected- and self capacitance
configurations (i.e. fCm / fCs= 2MHz / 1MHz).
A higher charge frequency selection is
preferred for increased immunity against
aqueous substances when used in most
projected
capacitance
configurations.
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IQ Switch®
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6.2.1 Capacitive Sense Electrode Design Samples
6.2.1.1 Self Capacitance Electrodes
2-Channel Self Capacitance Electrode
3-Channel Self Capacitance Electrode
Figure 6.1 : Self Capacitance Swipe Switch Sample Electrodes.
6.2.1.2 Projected Capacitance Electrodes
2-Channel Projected Capacitance Electrode
3-Channel Projected Capacitance Electrode
Figure 6.2 : Projected Capacitance Swipe Switch Sample Electrodes.
6.3 Float Rx
6.4 Output Logic Select
During the charge transfer process (see
Figure 8.1) the channels that are not being
processed during the current cycle, is
effectively grounded to decrease the effects
of noise-coupling between the sense
electrodes. Selecting the "Float RX" option
(Bank0 bit4), will thus result in the noncurrent channels to float (i.e. not grounded)
during the charge cycle of the current
channel.
The IQS213A can be set to sink or source
current in stand-alone mode (I2C Debug =
Disabled), by setting the logic output Active
High (Push-Pull) or Active Low (SW OD).
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For Active Low operation, the device output
pins are set in a software open-drain (SW
OD) configuration, which requires the use of
external pull-up resistors on the output pins.
The proximity output on the PO/TX-pin (pin
10) is multiplexed with the transmit signal
(TX) for projected capacitance electrodes,
and is Active High ONLY for Projected
configurations. Thus for self capacitance
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IQ Switch®
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configurations, the proximity output on PO
(pin10) depends on the selected output logic
(Bank0 bit5).
6.5 Halt Time
The Halt Timer is started when a proximity or
touch event occurs and is restarted when that
event is removed or reoccurs. When a
proximity condition occurs on any of the
channels, the LTA (Long-Term Average)
value for that channel will be "halted", thus its
value will be kept fixed, until the proximity
event is cleared, or the halt timer reaches the
halt time. The halt timer will count to the
selected halt time (tHALT), which can be
configured in the user selectable options (i.e.
Bank0 bit7:6), and if the timer expires, all
outputs will be cleared.
It is possible that the CS (Count) value could
be outside the ATI band (ATI Target +12.5%) when the timer expires, which will
cause the device to perform a re-ATI event.
The designer needs to select a halt timer
value (tHALT) to best accommodate the
required application:
2.5 seconds : Halt LTA for 2.5 seconds after the last proximity or touch event.
20 seconds
: Halt LTA for 20 seconds after the last proximity or touch event.
60 seconds
: Halt LTA for 60 seconds after the last proximity or touch event.
Never
: Never halt LTA
With the 'Never' option, the detection of a proximity or touch event
will not halt the LTA and the LTA will adjust towards the CS value
until the CS value is reached. The touch and proximity output of a
channel will thus be cleared automatically when the difference
between the LTA and CS is less than the specified threshold value.
6.6 Low Power Modes
The IQS213A IC has three low power modes
specifically designed to reduce current
consumption for battery applications.
The power modes are implemented around
the occurrence of a charge cycle every
tSAMPLE seconds (refer to Table 6.1). Lower
sampling
frequencies
typically
yield
significant lower power consumption (but also
decreases the response time).
During normal operation charge cycles are
initiated approximately every 2.6ms in the
stand-alone setup and 3.9ms in the I2C
debug setup. This is referred to as Normal
Power Mode (NP). The IQS213A by default
charges in Normal Power Mode.
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While in any low power mode, only Channel 0
is active and the device will zoom to NP
whenever the CS value indicates a possible
proximity or touch event on CH0 (refer to
Figure 6.3). This improves the response
time. The device will remain in NP for tZOOM
seconds and then return to the selected low
power mode. The Zoom function allows
reliable detection of events with the current
samples being produced at the NP rate.
Please see Section 8.4 or refer to
“Application Note AZD079 – IQS213 Touch
response rate” for more information.
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Table 6.1 : Low Power Mode Timing (tLP)
Power Mode
tSAMPLE
tSAMPLE
(Stand-alone)
(I2C )
NP (Default)
2.6 ms
3.9ms
LP1
128 ms
128ms
LP2
256 ms
256ms
LP3
512 ms
512ms
Figure 6.3 : LP Modes – Charge Cycles
6.7 Proximity Threshold
The IQS213A has 2 proximity threshold (PTH)
settings. The proximity threshold is selected by
the designer to obtain the desired sensitivity
and noise immunity. The proximity event is
triggered based on the selected proximity
threshold, which is either 3 or 8 counts.
The proximity threshold is expressed in terms
of counts, the same as the CS value.
For proximity events, the difference between
the LTA and CS (in counts) of the proximity
channel should be greater than PTH for at least
4 consecutive samples, unless the CS delta is
greater than the touch threshold of any active
channel. (See Section 8.8)
6.8 Touch Thresholds
The IQS213A has 8 touch threshold settings.
The touch threshold is selected by the
designer to obtain the desired touch sensitivity.
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The touch event is triggered based on the
selected touch threshold, which is expressed
as a fraction of the LTA, given by:
ܶܶ ܪൌ ݔΤʹͷͷ ൈ ܣܶܮ. (See Section 8.8)
For a touch event, the difference between LTA
and CS (counts) of the touch channel should
be greater than the selected touch threshold
for at least 2 consecutive samples.
On the IQS213A device, the touch threshold
settings are grouped for channels 1 and 3
(CH1,3 TTH) and is separate for channel 2 (CH2
TTH).
The IQS213A device is by default setup
without the alternative threshold settings. The
alternative threshold values can be selected by
setting the TTH_ALT bit (i.e. bit3 in Bank1).
If for specific applications the designer requires
larger touch threshold values than the
available selections, they may select the “3CH
SWIPE – 1zz x2x zz3 (TH*2)” IC TYPE in
Bank0 of the user configurable options.
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IQ Switch®
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This selection is for a three channel sense
electrode
configuration
only
and
will
automatically multiply the threshold selections
by two.
6.9 IQS213A SWIPE UI
The IQS213A has 4 selectable swipe switch
user interface (UI) configurations. The swipe UI
specifies the required event(s) to activate the
outputs of the device:
Single Direction:
The device only acknowledges
swipe events in the direction of
CH1>CH2 for a 2-channel and
CH1>CH2>CH3 for a 3-channel
device setup.
Bi-Directional:
The device acknowledges swipe
events in both the forward
(CH1>CH2>...) and reverse
(...>CH2>CH1) directions.
This grants the designer a certain degree of
freedom in the selected device sensitivity and
implemented sense electrode.
If for example the IC type is selected to be
“3CH SWIPE - 1zz z2z zz3”, then the
sequence ‘1zz zzz z2z zzz zz3’ of state
combinations will also be acknowledged as a
valid swipe event.
6.11 End on Zero State
Setting the Zero_End bit in Bank2, will append
an additional zero or "no touch" state to the
required sequence of state combinations.
If for example the IC type is selected to be
“3CH SWIPE - 1zz z2z zz3”, then the
sequence ‘1zz z2z zz3 zzz’ of state
combinations will be acknowledged as a valid
swipe event ONLY.
Directional:
A swipe event in the forward
(CH1>CH2>...) direction will
enable the swipe output (ON)
and a swipe in the reverse
(...>CH2>CH1)
direction
will disable the output (OFF).
each sequence of the selected IC type (refer to
Section 6.1 for IC types).
Dual Swipe:
This UI requires a swipe event
in one direction, followed by a
swipe event in the opposite
direction within 1 second, to
enable the swipe output (ON).
Thereafter, a single swipe in
any direction will subsequently
disable the swipe output again
(OFF).
6.10 Zero States Allowed
Setting the Zero_State bit in Bank2, will allow
the occurrence of zero or "no touch" conditions
between the different state combinations in
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6.12 State Times
The minimum, maximum and overall swipe
state times controls the effective period during
which a successful swipe event can be
recognized. The state times are defined in
swipe state samples, where each sample
period tSTATE is equal to 4 charge transfer
periods. For stand-alone device operation this
results in a state sample time of approximately
tSTATE = 10.4ms.
The state time values can also be set up or
changed in I2C debug mode.
6.12.1 Minimum State Time
The minimum state time (tMIN) defines the
minimum period (in multiples of tSTATE) for
which each combination of states (e.g. 1zz)
must be present during processing of the
current sequence of the state combination.
Selecting shorter minimum state times will
effectively allow faster swipe events.
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IQ Switch®
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6.12.2 Maximum State Time
The maximum state time defines the maximum
period for which each combination of states
(e.g. 1zz) may be present during processing of
the current sequence of the state combination.
This value is fixed at tMAX = 45*tSTATE by default,
but is accessible in I2C debug mode. Selecting
longer maximum state times will effectively
allow slower swipe events.
6.12.3 Overall State Time
The overall state time is the total allowable
time for performing a swipe event and is by
default set to 1 second. This value can also be
changed in I2C debug mode in steps of 250ms.
6.13 Touch/Swipe (Pin7) Output
The IQS213A has one complementary output
on pin 7 of the IC. This pin can be configured
to output either touch events or pulses upon
swipe events, after the swipe output (pin 6) has
been enabled.
By default the IQS213A will output a logic
signal for touch events on any of the three
sense electrodes. If the Pin7_Out bit in Bank2
is set, the device will output a short pulse for
every consecutive swipe event within 2
seconds after the first swipe event.
The generated pulses have different pulse
widths (tPULSE), depending on the direction of
the swipe event:
Long Pulse: A long pulse (tPULSE ≈
9ms) will be output for swipes in the
forward (CH1>CH2...) direction.
Short Pulse: A short pulse (tPULSE ≈
3ms) will be output for swipes in the
reverse (...>CH2>CH1) direction.
6.14 AC Filter
The AC filter can be implemented to provide
better stability of the proximity channel’s count
(CS) measurements in electrically noisy
environments by setting the ACF bit in Bank2.
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The AC filter also enforces a longer minimum
sample time for detecting proximity events,
which may result in a slower response rate
when the device enters low power modes.
6.15 ATI Method
In the stand-alone configuration the IQS213A
is automatically set up in Full ATI to set up the
device for optimal sensitivity.
In the I2C debug configuration, the IQS213A
can be set up to start in two ways, Full ATI and
Partial ATI. In Full ATI mode, the device
automatically selects the multipliers through
the ATI algorithm to setup the IQS213A as
close as possible to its default sensitivity for
the environment where it was placed. The
designer can, however, select Partial ATI, and
set the multipliers to a pre configured value.
This will cause the IQS213A to only calculate
the compensation (not the compensation and
multipliers as in Full ATI), which allows the
freedom to make the IQS213A more or less
sensitive for its intended environment of use.
(Please refer to Section 8.9.)
6.16 Base Value
The IQS213A has the option to change the
base value of all channels during the ATI
algorithm. Depending on the application, this
provides the user with another option to select
the sensitivity of the IQS213A without changes
in the hardware (CX sizes and routing, etc). By
setting the ATI_Base bit in Bank3, the base
value can be set to be 75 or 100. A lower base
value will typically result in a higher sensitivity
of the device. (Refer to Section 8.9)
6.17 ATI Target Value
The default target counts of the IQS213A are
320 for the proximity channel, and 160 for the
touch channels.
However, for some applications, a more
sensitive device and higher target is required.
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Therefore, the ATI_Target bit in Bank3 can be
set, changing the targets to 640 for the
proximity channel, and 320 for the touch
channels. (See Section 8.9)
6.18 Auto-Off / Advanced AutoOff Warning
To prevent battery drainage in the unlikely
event of a false activation of the output load,
the IQS213A is equipped with an Auto-Off
functionality. The Auto-Off (AAO) feature can
be disabled by setting the AAO bit in Bank3.
6.18.1 Advanced
(AAOW)
Auto-Off
Warning
In stand-alone operation the Advanced AutoOff Warning (AAOW) timer is set for 10
minutes. After the first warning, a second
warning will be given after 30s. Another 30s
after the second warning, the device will switch
off automatically (i.e. disable all outputs).
In I2C operation the Auto-Off (AAO) and
Advanced Auto-Off Warning (AAOW) timers
can be set to any value in multiples of 30s.
6.18.2 AAOW Clear / Reset
The AAO timer is by default cleared (reset) on
a touch event on any channel. Setting the
AAO_CLR bit in Bank3, the AAO timer will be
reset upon a proximity event.
be active low when it is ready for
communication, and it will go high when it is
doing conversions. The IQS213A will not
acknowledge (ACK) on its address while the
RDY line is high (i.e. while the IQS213A is
doing conversions).
7 Additional Features
7.1 Noise Detection
The IQS213A has advanced integrated
immunity to RF noise sources such as GSM
cellular telephones, DECT, Bluetooth and WIFI
devices. Design guidelines should however be
followed to ensure the best noise immunity.
(Please see Section 8.10)
7.1.1 Notes for layout:
A ground plane should be placed under
the IC, except under the CX lines.
Place the sensor IC as close as
possible to the sense electrodes.
All the tracks on the PCB must be kept
as short as possible.
The capacitor between VDDHI and
GND as well as between VREG and
GND must be placed as close as
possible to the IC.
A 100pF capacitor can be placed in
parallel with the 1uF capacitor between
VDDHI and GND. Another 100pF
capacitor can be placed in parallel with
the 1uF capacitor between VREG and
GND.
When the device is too sensitive for a
specific application a parasitic capacitor
(max 5pF) can be added between the
CX line and ground.
Proper sense antenna and button
design principles must be followed.
Unintentional
coupling
of
sense
antenna to ground and other circuitry
must be limited by increasing the
distance to these sources.
6.19 I2C Debug
A streaming option is available that allows for
serial data communication on the IQS213A.
Data streaming is done via an I2C compatible
3-wire interface, which consist of a data (SDA),
clock (SCL) and ready (RDY) line (for
IQS213A pin-out refer to Figure 4.1).
The IQS213A can only function as a slave
device on the bus, and will only acknowledge
on address 0x44H.
The RDY line is to be used by the host
controller as an indication of when to start
communication to the device. The RDY line will
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IQ Switch®
ProxSense® Series
In some instances a ground plane
some distance from the device and
sense antenna may provide significant
shielding from undesirable interference.
However, if after proper layout,
interference from an RF noise
source persists, see application
note AZD015.
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IQS213A Datasheet
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IQ Switch®
ProxSense® Series
8 ProxSense® Module
The IQS213A contains a ProxSense® module
that uses patented technology to provide
detection of PROX/TOUCH on numerous
sensing lines.
The ProxSense® module is a combination of
hardware and software, based on the
principles of charge transfer measurements.
For I2C communication related data registers,
please refer to the IQS213A Memory Map in
Section 10.
8.1 Charge Transfer Concepts
Capacitance measurements are taken with a
charge transfer process that is periodically
initiated.
Self capacitance sensing measures the
capacitance between the sense electrode (Cx)
relative to ground.
integer values). The CS values (12 bit
unsigned integer values) are processed and
compared to the LTA to detect Touch and
Proximity events.
For more information regarding capacitive
sensing, refer to the application note: “AZD004
– Azoteq Capacitive Sensing”.
Please note: Attaching scope probes to the
Cx/CTX/CRX pins will influence the
capacitance of the sense electrodes and
therefore the related CS values of those
channels. This will have an instant effect on
the CS measurements.
8.2 ProxSense® Module Setup
The IQS213A samples its channels in 4 time
slots, with one internal Cs capacitor. The
charge sequence is illustrated in Fig. 8.1.
Projected capacitance sensing measures the
capacitance between 2 electrodes referred to
as the transmitter (CTX) and receiver (CRX).
The measuring process is referred to as a
charge transfer cycle and consists of the
following:
Discharging of an internal sampling
capacitor (Cs) and the antenna
capacitors (self: Cx or projected: CTX &
CRx) on a channel.
charging of Cx’s / CTX’s connected to
the channel
and then a series of charge transfers
from the Cx’s / CRX’s to the internal
sampling capacitors (Cs), until the trip
voltage is reached.
The number of charge transfers required to
reach the trip voltage on a channel is referred
to as the Count or CS value.
The device continuously repeats charge
transfers on the sense electrodes connected to
the Cx pin. For each channel a Long Term
Average (LTA) is calculated (12 bit unsigned
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Figure 8.1 IQS213(A) Charge Transfers
The IQS213A charges its four channels, CH0
(Distributed Proximity Channel) and three
Touch Channels (CH1, CH2 and CH3)
independently during the four time slots.
During these time slots, the non-current
channels can either be grounded or set to float.
8.3 Self- or Projected
Capacitance
The IQS213A IC can be used in either self- or
projected capacitance configurations. The IC is
default in a 2-channel self capacitance setup.
This can be changed to a projected
capacitance configuration in the user
selectable
options
(Bank0
bit3).
The
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technology enabled on the IC will be reported
in the SYSFLAGS register.
The IQS213A has two selectable charge
transfer frequencies. For projected capacitance
sense electrodes the charge frequency is by
default set at fCm = 1MHz, and for self
capacitance configurations fCs= 500kHz.
Setting the CHG_FRQ bit in Bank2 will double
the charge frequency for both projected- and
self capacitance configurations (i.e. fCm / fCs=
2MHz / 1MHz).
A higher charge frequency selection is
preferred for increased immunity against
aqueous substances when used in most
projected capacitance electrode configurations.
8.4 Rate of Charge Cycles
8.4.1 Normal Power rate
With the IQS213A in Normal Power (NP)
mode, the sense channels are charged at a
fixed sampling frequency (fSAMPLE) per channel.
This is done to ensure regular samples for
processing of results. It is calculated as each
sample having a time (tSAMPLE = charge period
(tCHARGE) + computation time)) of approximately
2.6ms, thus the time between consecutive
samples on a channel (tCHANNEL) will optimally
be tSAMPLE = 4 * tSAMPLE ≈ 10.4ms (or 96Hz). The
charge sequence and timings are illustrated in
Figure 8.2.
If a channel is thus disabled, the sampling rate
on the remaining channels will reduce with
approximately 2.6ms.
8.4.2 Low Power rates
Low current consumption charging modes are
available. In any Low Power (LP) mode, there
will be an applicable low power time (tLP). This
is determined by the LP_PERIOD register. The
value written into this register multiplied by
16ms will yield the LP time (tLP).
Please note that this time is only applicable
from value 03h and higher loaded into the
LP_PERIOD register. The values 01h and 02h
will have a different time. See Table 6.1 for all
timings.
With the detection of an undebounced
proximity event the IC will zoom to NP mode,
allowing a very fast reaction time for further
possible touch / proximity events. All active
channels will be consecutively charged every
TLP.
If a LP rate is selected through register
LP_Period and charging is not in the zoomed
in state (NP mode), the LP_Active bit
(SYSFLAGS register) will be set.
8.5 Touch Report Rate
During Normal Mode operation, the touch
report rate of the IQS213A device depends on
the charge transfer frequency, the number of
channels enabled and the length of
communications performed by the master
device.
8.6 Active channels
The user has the option to enable the third
channel (CH3) during I2C operation. This can
be done in the SWIPE_SETTINGS register
(SET_3CH bit). Only two channels (CH1 and
CH2) are default enabled.
Note: During Low Power (LP) modes only CH0
is active.
Figure 8.2 Signals on CX’s / CRX’s during
Normal Power Mode.
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8.7 Long Term Average (LTA)
The LTA filter can be seen as the baseline or
reference value. The LTA is calculated to
continuously adapt to any environmental drift.
The LTA filter is calculated from the CS value
for each channel. The LTA filter allows the
device to adapt to environmental (slow moving)
changes/drift. Actuation (Touch or Prox)
decisions are made by comparing the CS
value with the LTA reference value.
The 12bit LTA value is contained in the LTA_H
and LTA_L registers.
Please refer to Section 6.5 for LTA Halt Times.
adjust the sample value for an attached
sensing antenna.
ATI allows the designer to optimize a specific
design by adjusting the sensitivity and stability
of each channel through the adjustment of the
ATI parameters.
The IQS213A has an automated ATI function.
The auto-ATI function is default enabled, but
can be disabled by setting the ATI_OFF and
ATI_Partial bits in the PROX_SETTINGS
registers.
The ATI_Busy bit in the SYSFLAGS register
will be set while an ATI event is busy.
8.9.1 ATI Sensitivity
8.8 Determine Touch or Prox
An event is determined by comparing the CS
with the LTA. Since the CS reacts differently
when comparing the self- with the projected
capacitance technology, the user should
consider only the conditions for the technology
used.
An event is recorded if:
Self: CS < LTA – Threshold
Projected: CS > LTA + Threshold
Threshold can be either a Proximity or Touch
threshold, depending on the current channel
being processed.
Please refer to Section 6.7 and 6.8 for
proximity and touch threshold selections.
8.9 ATI
The Automatic Tuning Implementation (ATI) is
a sophisticated technology implemented on the
new ProxSense® series devices. It allows for
optimal performance of the devices for a wide
range of sense electrode capacitances, without
modification
or
addition
of
external
components.
The ATI allows the tuning of two parameters,
an ATI Multiplier and an ATI Compensation, to
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In I2C mode, the designer can specify the
global BASE value for all channels and the
TARGET values for the proximity (CH0) and
touch (CH1,CH2,CH3) channels. A rough
estimation of sensitivity can be calculated as:
ܵ݁݊ ݕݐ݅ݒ݅ݐ݅ݏൌ
ܶܶܧܩܴܣ
ܧܵܣܤ
As can be seen from this equation, the
sensitivity can be increased by either
increasing the Target value or decreasing the
Base value. It should, however, be noted that a
higher sensitivity will yield a higher noise
susceptibility.
8.9.2 ATI Target
The target is reached by adjusting the
COMPENSATION bits for each channel.
The target value is written into the respective
channel’s TARGET registers. The value written
into these registers multiplied by 8 will yield the
new target value.
8.9.3 ATI Base (MULTIPLIER)
The following parameters will influence the
base value:
CS_SIZEi: Size of sampling capacitor.
i
Changing CS_SIZE if ATI_OFF = 0 will
change CS
IQS213A Datasheet
Revision 3.0
Page 28 of 48
October 2018
IQ Switch®
ProxSense® Series
PROJ_BIAS bits: Adjusts the biasing of
some analogue parameters in the projected
capacitive operated IC. (Only applicable in
projected capacitance mode.)
MULTIPLIER bits.
The base value used for the ATI function can
be implemented in 2 ways:
1. ATI_PARTIAL = 0. ATI automatically
adjusts MULTIPLIER bits to reach a
selected base valueii. Base values are
available in the BASE_VALUE register.
Noise affected samples are not allowed to
influence the LTA filter, and also do not
contribute to proximity or touch detection. With
the detection of noise, the NOISE_FOUND bit
in SYSFLAGS will be set.
8.10.1 RF detector sensitivity
The sensitivity of the RF detector can be
selected by setting an appropriate RF
detection voltage through the RF_TRIM bits.
Please see application note AZD015 for further
details regarding this option.
2. ATI_PARTIAL = 1. The designer can
specify the multiplier settings. These
settings will give a custom base value
from where the compensation bits will
be automatically implemented to reach
the required target value.
8.9.4 Re-ATI
An automatic re-ATI event will occur if the CS
is outside its re-ATI limits. The re-ATI limit is
calculated as the target value divided by 8. For
example:
Target = 320
Re-ATI will occur if CS is outside 320±40.
During I2C operation, a re-ATI event can also
be issued by the master by setting the
REDO_ATI bit. It will clear automatically after
the ATI event was started.
8.10 RF Detection
In cases of extreme RF interference, the onchip RF detection is suggested. This detector
can be enabled by setting the Noise_Detect bit
in the PROX_SETTINGS1 register. By
connecting a suitable antenna to the RF pin, it
allows the device to detect RF noise and notify
the master of possible corrupt data.
ii
ATI function will use user selected CS_SIZE and
PROJ_BIAS (if applicable) and will only adjust the
MULTIPLIER bits to reach the base values.
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IQS213A Datasheet
Revision 3.0
Page 29 of 48
October 2018
IQ Switch®
ProxSense® Series
9 Communication
The IQS213A can communicate on the I2C
compatible bus structure. It uses a 3-wire serial
interface bus which is I2C compatible and
comprise of a data (SDA), clock (SCL) and
optional ready (RDY) line (for IQS213A pin-out
refer to Figure 4.1).
The IQS213A has one available I2C address,
I2C address = 0x44H.
2
The maximum I C compatible communication
speed for the IQS213A is 400kbit/s.
9.1 Event Mode
9.2.2 WDT
The WDT is used to reset the IC if a problem
(for example a voltage spike) occurs during
communication. The WDT will time-out after
tWDT, if no valid communication occurs for this
time.
9.3 I2C Read and Write specifics
For more details, please refer to the IQS213A
Memory Map (Section 10) for device memory
register descriptions and application note:
“AZD066: IQS213 Communication Interface
Guideline”
document
available
at:
www.azoteq.com.
The IQS213A will by default be configured to
only communicate with the master if a change
in an event occurs. For this reason, it would be
highly recommended to use the RDY line when
communicating with the IQS213A, especially in
Low Power (LP) modes. These communication
requests are referred to as Event Mode
triggering (only changes in events are
reported).
Event mode can be disabled by setting the
EVENT_MODE_OFF bit.
The events responsible for resuming
communication can be chosen through the
EVENT_MASK register. By default all events
are enabled.
The device can also communicate on polling
basis, using only the SDA and SCL lines.
9.2 I2C Specific commands
9.2.1 IC Reset indication
SHOW_RESET can be read to determine
whether a reset occurred on the device. This
bit will be a ‘1’ after a reset. The value of
SHOW_RESET can be cleared to ‘0’ by writing
a ‘1’ in the ACK_RESET bit.
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All Rights Reserved
IQS213A Datasheet
Revision 3.0
Page 30 of 48
October 2018
IQ Switch®
ProxSense® Series
10
IQS213A Memory Map
10.1 Memory Registers
Table 10.1 : IQS213A Memory Registers
Register Address
Register Name
Description
00H
Product Number
‘D43’ / ‘2BH’
01H
Version Number
‘02’
10H
Sys_flags0
System Flags - See Table 10.2
11H
Swipe Flags
Swipe Switch Flags - See Table 10.2
35H
Touch CHs
Channels Touched - See Table 10.2
3DH
Chan_num
Number of Currently Processed Channel
42H
CS High
Count (CS) value [high byte]
43H
CS Low
Count (CS) value [low byte]
83H
LTA High
Long Term Average [high byte]
84H
LTA Low
Long Term Average [low byte]
C4H
Current Sate
Swipe Engine Current State
C5H
Measured State
Current Measured State (Acc. to Touches)
C6H
Next State
Swipe Engine Next Expected State
C7H
Swipe States
Combination of States Required for Swipe
C8H
Swipe Min Timer
Minimum timer counts – swipe periods
C9H
Swipe Max Timer
Maximum Overall timer – 250ms periods
CAH
Swipe Max State Timer
Maximum Per State timer – swipe periods
CBH
Swipe Settings
IQS213 Set Up - See Table 10.2
CCH
Prox Settings 0
IQS213 Set Up - See Table 10.2
CDH
Prox Settings 1
IQS213 Set Up - See Table 10.2
CEH
Prox Settings 2
IQS213 Set Up - See Table 10.2
CFH
ATI Target CH0
(Target CH0) *8 = Channel 0 Target Value
D0H
ATI Target CH1-CH3
(Target CH1-CH3) *8 = Channel 1-3 Target Value
D1H
Prox Threshold
Proximity Threshold Value (In Counts)
D2H
Touch Threshold 1
Channel 1 Touch Threshold [In Counts]
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IQS213A Datasheet
Revision 3.0
Device Information
Device Specific Data
Count Data
Device Settings
Page 31 of 48
October 2018
IQ Switch®
ProxSense® Series
Register Address
Register Name
Description
D3H
Touch Threshold 2
Channel 2 Touch Threshold [In Counts]
D4H
Touch Threshold 3
Channel 3 Touch Threshold [In Counts]
D5H
Base Value
ATI Base Value [0-256 - In Counts]
D6H
Event Mask
Events Allowed - See Table 10.2
D7H
Mirror_CH0
Mirror – lower 6 bits – NN PPP
D8H
Mirror_CH1
Mirror – lower 6 bits – NN PPP
D9H
Mirror_CH2
Mirror – lower 6 bits – NN PPP
DAH
Mirror_CH3
Mirror – lower 6 bits – NN PPP
DBH
PCC0
CH0 Compensation
DCH
PCC1
CH1 Compensation
DDH
PCC2
CH2 Compensation
DEH
PCC3
CH3 Compensation
DFH
AAOW Timer
(AAOW Timer)*30s = Auto-Off Warning time
E0H
AO Timer
(AO Timer)*30s = Auto-Off time
E1H
Swipe Min Samples
Set minimum samples per state [x+1]
E2H
Swipe Max Samples
Set maximum samples per state [x+1]
E3H
Swipe Overall Limit
Set Overall Swipe Length Limit [*250ms]
E4H
LP Period
(LP Period)*16ms = Low Power Charge Timing (tLP)
E5H
Touch States 0
Swipe Engine Configuration
E6H
Touch States 1
Swipe Engine Configuration
E7H
Touch States 2
Swipe Engine Configuration
E8H
Touch States 3
Swipe Engine Configuration
E9H
Touch States 4
Swipe Engine Configuration
EAH
Touch States 5
Swipe Engine Configuration
EBH
Touch States6
Swipe Engine Configuration
ECH
Touch States 7
Swipe Engine Configuration
EDH
Default Comms
Default Comms pointer
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IQS213A Datasheet
Revision 3.0
Device Settings
Device Settings
Page 32 of 48
October 2018
IQ Switch®
ProxSense® Series
Table 10.2 : IQS213A Memory Register bits
bit7
bit6
bit5
bit4
bit3
bit2
bit1
bit0
Prox
Settings 0
Show
Reset
ACK Reset
Reseed
Redo ATI
ATI Partial
Float CX
THALT1
THALT0
Prox
Settings 1
Comms
WDT OFF
Event
Mode OFF
Debug I2C
AO Clear
Prox
AO OFF
ACF OFF
ATI OFF
Noise
Detect OFF
IO_OUT
CS_Cap
Proj_B1
Proj_B0
Prox
Settings 2
Swipe
Settings
Swipe Flags
Set_3CH
Touches/P
ulses
Swipe UI
Swipe UI
End_Zero
Zero_State
States
Relaxed
Swipe
Active
Swipe
Pulse Flag
Time Out
Flag
Slide
Occurred
DualSwipe
Active
Swipe
Direction
AO
Triggered
Final State
Start State
Noise
Event
ATI Event
Swipe
Event
Touch
Event
Prox Event
Projected
CapSense
Filter Halt
ATI Busy
Noise
Found
Zoom
CH3
CH2
CH1
CH0/Prox
Event Mask
Sys_flags0
System
Use
Touch CHs
Swipe
Output
LP Active
Active
High
10.2 Memory Registers Description
10.2.1 Device Information
00H
Product Number (Prod_NR)
Access
Bit
R
Value
7
6
4
3
2
1
0
2
1
0
43 (Decimal)
01H
5
Version Number (Ver_NR)
Access
Bit
R
Value
[00H] PROD_NR :
[01H] VER_NR :
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7
6
5
4
3
Ver_NR
The product number for the IQS213A is 43 (decimal).
Device ROM software version number can be read in this byte.
IQS213A Datasheet
Revision 3.0
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October 2018
IQ Switch®
ProxSense® Series
10.2.2 Device Specific Data
10H
Access
R
System Flags (Sys_flags0)
Bit
7
6
5
4
3
2
1
0
Name
System
Use
LP
Active
Active
High
Projected
CapSense
Filter
Halt
ATI
Busy
Noise
Found
Zoom
[10H] Sys_flags0:
bit7:
System Use
bit6:
LP Active – Indicates if device is in a Low Power Mode.
bit5:
Active High – Bit is set if Output Logic is Active High.
bit4:
Projected CapSense – Bit is set if Projected Capacitance
technology is used.
bit3:
Filter Halt – Indicates if LTA filters are halted.
bit2:
ATI Busy – Indicates if ATI algorithm is being performed.
bit1:
Noise Found – Bit is set if RF noise is detected. (RF Detection
must be enabled)
bit0:
Zoom – Indicates if device is zoomed to Normal Power.
11H
Swipe Switch Flags (Swipe Flags)
Access
Bit
R/W
Name
[11H] Swipe Flags:
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7
Swipe
Pulse
Flag
6
Time
Out
Flag
5
4
3
2
1
0
Slide
Occurred
DualSwipe
Active
Swipe
Direction
AO
Triggered
Final
State
Start
State
bit7:
Swipe Pulse Flag – Bit is set if Pin7 Output = Pulses
bit6:
Time Out Flag – Bit is set if Max State Timer is exceeded.
bit5:
Slide Occurred – Bit is set if Swipe event has occured.
(Note: Bit must be cleared manually)
bit4:
DualSwipe Active – Bit is set if Swipe UI = Dual Swipe.
bit3:
Swipe Direction – 0 = Forward direction, 1 = Reverse direction.
bit2:
AO Triggered – Bit is set if Auto-Off Warning has been set.
bit1:
Final State – Bit is set if Swipe Engine is in Final State.
bit0:
Start State – Bit is set if Swipe Engine is in Start State.
IQS213A Datasheet
Revision 3.0
Page 34 of 48
October 2018
IQ Switch®
ProxSense® Series
10.2.3 Current Sample (CS) or Count Data
35H
Access
Bit
7
Name
Swipe
Output
[35H] Touch CHs:
bit7:
Swipe Output – Bit is toggled on Swipe Events. (Note: This bit
corresponds to the IC swipe output (Pin6) and is UI dependent.)
bit6:
Not used.
bit5:
Not used.
bit4:
Not used.
bit3:
CH3 – Bit is set if a Touch is present on this channel.
bit2:
CH2 – Bit is set if a Touch is present on this channel.
bit1:
CH1 – Bit is set if a Touch is present on this channel.
bit0:
CH0/Prox – Bit is set if a Proximity Event is present.
R
Touch/Output Data (Touch CHs)
6
3DH
5
4
3
2
1
0
CH3
CH2
CH1
CH0/Prox
Channel Number (Chan_num)
Access
Bit
R
Name
[3DH] Chan_num:
Copyright © Azoteq (Pty) Ltd 2018
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7
6
5
4
3
2
1
0
Variable: Value between 0x00 and 0x03
bit7:0: The Chan_Num byte indicates which channel’s data is currently
available in the CS and LTA bytes:
0 = Ch0 (Distributed PROX channel)
1 = Ch1 (CRX0)
2 = Ch2 (CRX1)
3 = Ch3 (CRX2)
IQS213A Datasheet
Revision 3.0
Page 35 of 48
October 2018
IQ Switch®
ProxSense® Series
42H
Count (CS) Value High byte (CS High)
Access
Bit
R
Value
[42H] CS High:
7
6
2
1
0
Count (CS) Value Low byte (CS Low)
Access
Bit
R
Value
[43H] CS Low:
7
6
5
4
3
2
1
0
Variable (Low byte)
bit7:0: Count (CS) Value Low Byte of currently processed channel.
(See Channel Number.)
Long Term Average High byte (LTA High)
Access
Bit
R
Value
[83H] LTA High:
7
6
5
4
3
2
1
0
Variable (High byte)
bit7:0: Long Term Average (LTA) value High Byte of currently
processed channel. (See Channel Number.)
84H
3
bit7:0: Count (CS) Value High Byte of currently processed channel.
(See Channel Number.)
83H
4
Variable (High byte)
43H
5
Long Term Average Low byte (LTA Low)
Access
Bit
R
Value
[84H] LTA Low:
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7
6
5
4
3
2
1
0
Variable (Low byte)
bit7:0: Long Term Average (LTA) value Low Byte of currently
processed channel. (See Channel Number.)
IQS213A Datasheet
Revision 3.0
Page 36 of 48
October 2018
IQ Switch®
ProxSense® Series
10.2.4 Device Settings
CBH
Access
R/W
SwipeSwitch Settings (Swipe Settings)
Bit
Name
7
Set_3CH
[CBH] Swipe Settings:
bit7:
bit6:
6
5
4
Touches/Pulses
Swipe
UI1
Swipe
UI0
3
End_Zero
2
1
0
Zero_State
States
Relaxed
Swipe
Active
Set_3CH – R/W bit. Set bit to enable 3rd channel (CRX2).
Touches/Pulses – Bit indicates/set output on IC pin 7.
bit5:4: Swipe UI – Bits indicate/set selected swipe user
interface (UI).
bit3:
End_Zero – R/W bit. (See Section 6.11)
bit2:
Zero_State – R/W bit. (See Section 6.10)
bit1:
States Relaxed – R/W bit. (See Section 6.1)
bit0:
Swipe Active – Bit indicates/set selection of Swipe/Normal
Mode IC TYPE. (See Section 6.1)
®
CCH
ProxSense Module Settings 0 (Prox Settings 0)
Access
Bit
7
6
5
4
3
2
1
0
R/W
Name
Show
Reset
ACK Reset
Reseed
Redo
ATI
ATI
Partial
Float CX
THALT1
THALT0
[CCH] Prox Settings 0:
bit7:
Show Reset – Bit is set if device was reset.
bit6:
ACK Reset – Set bit to acknowledge device reset (Setting this bit
will clear Show Reset bit).
bit5:
Reseed – Set bit to reseed LTA filter values.
bit4:
Redo ATI – Set bit to perform ATI algorithm.
bit3:
ATI Partial – R/W bit. (See Section 8.9)
bit2:
Float CX – R/W bit. (See Section 6.3)
bit1:0: THALT1:THALT0 – Bits indicate/set LTA halt period.
(See Section 6.5)
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IQS213A Datasheet
Revision 3.0
Page 37 of 48
October 2018
IQ Switch®
ProxSense® Series
®
CDH
ProxSense Module Settings 1 (Prox Settings 1)
Access
Bit
R/W
Name
7
Comms
WDT
OFF
[CDH] Prox Settings 1:
bit7:
5
Event Mode
OFF
Debug
I2C
4
AO
Clear
Prox
3
2
1
0
AO OFF
ACF OFF
ATI
OFF
Noise
Detect
OFF
Comms WDT OFF – R/W bit. (See Section 9.2)
bit6:
Event Mode OFF – Set bit to disable Event Mode I2C.
bit5:
Debug I2C – Bit is set during I2C operation. (Do not clear)
bit4:
AO Clear Prox – Set bit to clear Auto-OFF timer on Prox.
bit3:
AO OFF – Set bit to disable Auto-OFF function.
bit2:
ACF OFF – Bit is set if AC Filter is Disabled. (R/W)
bit1:
ATI OFF – Set bit to disable Auto-ATI functionality.
(See Section 8.9)
bit0:
Noise Detect OFF – Set bit to disable RF detection.
®
CEH
6
ProxSense Module Settings 2 (Prox Settings 2)
Access
Bit
R/W
Name
7
6
5
4
3
2
1
0
IO_OUT
CS_Cap
Proj_B1
Proj_B0
[CEH] Prox Settings 2:
bit7:
Not used.
bit6:
Not used.
bit5:
Not used.
bit4:
Not used.
bit3:
IO_OUT – Set bit to enable/disable additional output on PO/TX
pin (IC pin 10) during I2C operation.
bit2:
*CS_Cap – R/W bit for selection of Internal Reference
Capacitor size. (0 =29.9pF; 1= 59.8pF)
bit1:0 *Proj_B1:Proj_B0 – R/W bits for selection of internal bias
current for projected capacitance configurations.
*Please Note: It is not recommended to adjust the settings of the internal reference capacitor (Cs)
and bias current (i.e. bit2:0) of the ProxSense® Module Settings 2 register.
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IQS213A Datasheet
Revision 3.0
Page 38 of 48
October 2018
IQ Switch®
ProxSense® Series
2
D6H
I C Debug – Event Mode Event Mask (Event Mask)
Access
Bit
R/W
Name
[D6H] Event Mask:
Copyright © Azoteq (Pty) Ltd 2018
All Rights Reserved
7
6
5
4
3
2
1
0
Noise
Event
ATI
Event
Swipe
Event
Touch
Event
Prox
Event
bit7:
Not used.
bit6:
Not used.
bit5:
Not used.
bit4:
Noise Event – Set bit to mask RF Noise events during
Event Mode I2C comms. (Requires RF-detection = Enabled.)
bit3:
ATI Event – Set bit to mask ATI events during Event Mode
I2C comms.
bit2:
Swipe Event – Set bit to mask Swipe events during Event
Mode I2C comms.
bit1:
Touch Event – Set bit to mask Touch events during Event
Mode I2C comms.
bit0:
Prox Event – Set bit to mask Proximity events during Event
Mode I2C comms.
IQS213A Datasheet
Revision 3.0
Page 39 of 48
October 2018
IQ Switch®
ProxSense® Series
10.2.4.1 Swipe timing settings
E1H
Swipe Min Samples
Access
Bit
R/W
Name
7
6
5
[E1H] Swipe Min Samples:
2
1
0
bit7:0: Minimum number of valid samples required per state of
the selected Swipe Sequence = x+1.
For default (i.e. 0xE1 = 0x00), Min Swipe samples
required per state = 1 per state.
1 Swipe Sample = tSTATE – See Section 6.12
Swipe Max Samples
Access
Bit
R/W
Name
7
6
5
4
3
2
1
0
Variable: Default = 0x44
[E2H] Swipe Max Samples:
bit7:0: Maximum number of valid samples allowed per state of
the selected Swipe Sequence = x+1.
For default (i.e. 0xE2 = 0x44), Max Swipe samples
allowed per state = 45 per state.
1 Swipe Sample = tSTATE – See Section 6.12
E3H
3
Variable: Default = 0x00
E2H
4
Swipe Overall Limit
Access
Bit
R/W
Name
7
[E3H] Swipe Overall Limit:
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6
5
4
3
2
1
0
Variable: Default = 0x04
bit7:0: Set Overall Swipe Length Limit = x*250ms
For default (i.e. 0xE3 = 0x04), maximum time allowed to
complete a valid swipe = 1 second.
Swipe Overall Limit overrule sum of Swipe Max Samples
IQS213A Datasheet
Revision 3.0
Page 40 of 48
October 2018
IQ Switch®
ProxSense® Series
11
Electrical Specifications – All Preliminary
11.1 Absolute Maximum Specifications
Note: Exceeding these maximum specifications may cause damage to the device.
Operating temperature
-20°C to 85°C
Supply Voltage (VDDHI – VSS)
3.6V
Maximum pin voltage
Maximum continuous current (specific pins)
VDDHI + 0.5V
2mA
Pin voltage (Cx)
Minimum pin voltage
VREG
VSS - 0.5V
Minimum power-on slope
ESD protection (Human Body Model)
Maximum pin temperature during soldering
100V/s
±4kV
350°C (5 seconds)
Maximum load capacitance – Cx to GND
Maximum Rx-Tx Mutual capacitance (Cm)
100pF
9pF
11.2 General Characteristics (Measured at 25°C)
Table 11.1 IQS213A General Operating Conditions (a)
DESCRIPTION
Conditions
PARAMETER
MIN
TYP
MAX
UNIT
VDDHI
1.80
3.30
3.60
V
1.80 ≤ VDDHI ≤ 3.60
VREG
1.63
1.70
1.77
V
2CH Self
IIQS213A_NP
145
175
210
μA
150
180
215
μA
3.85
4.65
5.65
μA
3.90
4.70
5.70
μA
2.50
3.00
3.60
μA
2.55
3.10
3.65
μA
1.75
2.10
2.65
μA
1.80
2.20
2.75
μA
Supply voltage
Internal regulator output
Normal Power operating current
tLP = N/A
1.80 ≤ VDDHI ≤ 3.60
Low power 1 operating current
tLP = 128ms
1.80 ≤ VDDHI ≤ 3.60
1
Low power 2 operating current
tLP = 256ms
1.80 ≤ VDDHI ≤ 3.60
1
Low power 3 operating current
tLP = 512ms
1.80 ≤ VDDHI ≤ 3.60
1
1.
1
3CH Self
2CH Self
3CH Self
2CH Self
3CH Self
2CH Self
3CH Self
IIQS213A LP1
IIQS213A LP2
IIQS213A LP3
CHG FRQ = 500kHz, ATI Target = 320/160, Normal Touch IC, Stand-Alone, Active High Output. Altering the projected current
bias settings, reference capacitor (CS) size, number of active channels and ATI Target values will affect the measured
current.
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IQS213A Datasheet
Revision 3.0
Page 41 of 48
October 2018
IQ Switch®
ProxSense® Series
Table 11.2 IQS213A Current Consumption (b)
DESCRIPTION
Conditions
Normal Power operating current
tLP = N/A
1.80 ≤ VDDHI ≤ 3.60
Low power 1 operating current
tLP = 128ms
2
Low power 2 operating current
tLP = 256ms
2
Low power 3 operating current
tLP = 512ms
2
2.
2
2CH Self
PARAMETER
IIQS213A_NP
3CH Self
2CH Self
IIQS213A LP1
3CH Self
2CH Self
IIQS213A LP2
3CH Self
2CH Self
IIQS213A LP3
3CH Self
MIN
TYP
MAX
UNIT
150
180
210
μA
150
185
215
μA
4.35
4.90
5.75
μA
4.40
4.95
5.80
μA
2.85
3.45
4.10
μA
2.90
3.50
4.15
μA
2.15
2.60
3.15
μA
2.25
2.70
3.25
μA
CHG FRQ = 500kHz, ATI Target = 320/160, Event-Mode I2C, 10k Pull-Up’s. Altering the projected current bias settings,
reference capacitor (CS) size, number of active channels and ATI Target values will affect the measured current.
Table 11.3 IQS213A Current Consumption (c)
DESCRIPTION
Conditions
Normal Power operating current
tLP = N/A
1.80 ≤ VDDHI ≤ 3.60
Low power 1 operating current
tLP = 128ms
3
Low power 2 operating current
tLP = 256ms
3
Low power 3 operating current
tLP = 512ms
3
3.
3
2CH Projected
PARAMETER
MIN
TYP
MAX
UNIT
230
250
μA
235
250
μA
4.30
5.10
5.90
μA
4.35
5.15
6.00
μA
2.65
3.20
3.80
μA
2.70
3.25
3.90
μA
1.85
2.25
2.70
μA
1.90
2.30
2.75
μA
IIQS213A_NP
3CH Projected
2CH Projected
3CH Projected
2CH Projected
3CH Projected
2CH Projected
3CH Projected
IIQS213A LP1
IIQS213A LP2
IIQS213A LP3
CHG FRQ = 2MHz, ATI Target = 320/160, Stand-Alone, Active High Output. Altering the projected current bias settings,
reference capacitor (CS) size, number of active channels and ATI Target values will affect the measured current.
Table 11.4 IQS213A Current Consumption (d)
DESCRIPTION
Conditions
Normal Power operating current
tLP = N/A
1.80 ≤ VDDHI ≤ 3.60
Low power 1 operating current
tLP = 128ms
4
Low power 2 operating current
tLP = 256ms
4
Low power 3 operating current
tLP = 512ms
4
4.
4
2CH Projected
PARAMETER
MIN
TYP
MAX
UNIT
230
250
μA
235
260
μA
5.45
6.35
7.50
μA
5.60
6.50
7.60
μA
3.30
3.95
4.65
μA
3.40
4.00
4.75
μA
2.40
2.90
3.40
μA
2.50
3.00
3.45
μA
IIQS213A_NP
3CH Projected
2CH Projected
3CH Projected
2CH Projected
3CH Projected
2CH Projected
3CH Projected
IIQS213A LP1
IIQS213A LP2
IIQS213A LP3
CHG FRQ = 2MHz, ATI Target = 640/320, Event-Mode I2C, 10k Pull-Up’s. Altering the projected current bias settings,
reference capacitor (CS) size, number of active channels and ATI Target values will affect the measured current.
Copyright © Azoteq (Pty) Ltd 2018
All Rights Reserved
IQS213A Datasheet
Revision 3.0
Page 42 of 48
October 2018
IQ Switch®
ProxSense® Series
Table 11.5 Start-up and shut-down slope Characteristics
DESCRIPTION
Conditions
POR
PARAMETER
VDDHI Slope ≥ 100V/s
BOD
MIN
MAX
UNIT
POR
1
1.55
V
BOD
1
1.5
V
Table 11.6 Debounce employed on IQS213A
DESCRIPTION
Conditions
Debounce Value
Proximity debounce value
Proximity event
4 (Up and Down)
Touch debounce value
Touch event
2 (Up and Down)
11.3 Timing Characteristics
Table 11.7 Main Oscillator
SYMBOL
FOSC
1.
DESCRIPTION
IQS213A Main oscillator
Conditions
1
MIN
TYP
1.80 ≤ VDDHI ≤ 3.60
MAX
UNIT
4
MHz
All timings derived from Main Oscillator
Table 11.8 General Timing Characteristics for 1.80V ≤ VDDHI ≤ 3.60V
SYMBOL
DESCRIPTION
Conditions
tSTART-UP
Start-up time before the first
communication is initiated by
the IQS213A
fCX
Charge transfer frequency
tCHARGE
Charge time per channel
tCHANNEL
Stand-alone / I C Mode
TYP
MAX
UNIT
15
ms
See CHG_FRQ in
Section 8.3
MHz
CS * (1/fCX)
ms
Normal
Power
2
tSAMPLE
tWDT
MIN
2.6 / 3.9
ms
Active channels * tCHANNEL
ms
160
ms
WDT time-out while
communicating
Table 11.9 IQS213A Charging Times
TYPICAL (ms)
POWER MODE
Standalone
I2C
Normal Power Mode
2.6
3.9
Low Power Mode 1
128
128
Low Power Mode 2
256
256
Low Power Mode 3
512
512
**NOTE: with ACF = ON, “wake-on-prox” times will increase due to the CS having to go through an
additional filtering process adding a delay. Please refer to “Application Note AZD079 – IQS213 Touch
response rate” for more information.
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All Rights Reserved
IQS213A Datasheet
Revision 3.0
Page 43 of 48
October 2018
IQ Switch®
ProxSense® Series
12 Packaging Information
Figure 12.1
MSOP-10 Package Dimensions
MSOP-10 PCB Footprint Dimensions:
Dimension
Pitch
C
Y
X
Figure 12.2
Copyright © Azoteq (Pty) Ltd 2018
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[mm]
0.50
4.40
1.45
0.30
MSOP-10 PCB Footprint
IQS213A Datasheet
Revision 3.0
Page 44 of 48
October 2018
IQ Switch®
ProxSense® Series
12.1 Tape and Reel Specification
Figure 12.5 MSOP-10 Tape Specification. Bulk orientation LT
12.2 Package MSL
Moisture Sensitivity Level (MSL) relates to the packaging and handling precautions for some
semiconductors. The MSL is an electronic standard for the time period in which a moisture
sensitive device can be exposed to ambient room conditions (approximately 30°C/85%RH see JSTD033C for more info) before reflow occur.
Table 12.1 MSOP-10 MSL classification
Package
Level (duration)
MSL 1 (Unlimited at ≤30 °C/85% RH)
MSOP-10
Reflow profile peak temperature < 260 °C for < 25 seconds
Number of Reflow ≤ 3
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IQS213A Datasheet
Revision 3.0
Page 45 of 48
October 2018
IQ Switch®
ProxSense® Series
13 Device Marking
13.1 Top marking
IC NAME
IQS213A
=
IQS213A
REVISION
x
=
IC Revision Number
TEMPERATURE RANGE
t
=
=
i
c
DATE CODE
P
=
Package House
WW
=
Week
YY
=
Year
-20°C to 85°C (Industrial)
0°C to 70°C (Commercial)
13.2 Bottom Marking
zzzzzzzz
Configuration
Copyright © Azoteq (Pty) Ltd 2018
All Rights Reserved
zzzzzzzz
=
Device Configuration /
User Programmable Options
[Default = 00000000]
IQS213A Datasheet
Revision 3.0
Page 46 of 48
October 2018
IQ Switch®
ProxSense® Series
14 Ordering Information
Orders will be subject to a MOQ (Minimum Order Quantity) of a full reel. Contact the official
distributor for sample quantities. A list of the distributors can be found under the “Distributors”
section of www.azoteq.com.
14.1 General Part Order Number
IQS213A
zzzzzzzz
pp
b
IC NAME
IQS213A
=
IQS213A
CONFIGURATION
zzzzzzzz
=
User Programmable Option Selection
PACKAGE TYPE
MS
=
MSOP10
BULK PACKAGING
R
=
Reel (4000pcs/reel)
Copyright © Azoteq (Pty) Ltd 2018
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IQS213A Datasheet
Revision 3.0
Page 47 of 48
October 2018
IQ Switch®
ProxSense® Series
Azoteq
USA
Asia
South Africa
Physical
Address
11940 Jollyville
Suite 120-S
Austin
TX 78750
USA
Room 501A, Block A,
T-Share International Centre,
Taoyuan Road, Nanshan District,
Shenzhen, Guangdong, PRC
1 Bergsig Avenue
Paarl
7646
South Africa
Postal
Address
11940 Jollyville
Suite 120-S
Austin
TX 78750
USA
Room 501A, Block A,
T-Share International Centre,
Taoyuan Road, Nanshan District,
Shenzhen, Guangdong, PRC
PO Box 3534
Paarl
7620
South Africa
Tel
+1 512 538 1995
+86 755 8303 5294
ext 808
+27 21 863 0033
Email
info@azoteq.com
info@azoteq.com
info@azoteq.com
Visit www.azoteq.com
for a list of distributors and worldwide representation.
Patents as listed on www.azoteq.com/patents-trademarks/ may relate to the device or usage of the device.
Azoteq®, Crystal Driver , IQ Switch®, ProxSense®, ProxFusion®, LightSense™, SwipeSwitch™, and the
logo are trademarks of Azoteq.
The information in this Datasheet is believed to be accurate at the time of publication. Azoteq uses reasonable effort to maintain the information up-to-date and accurate, but does
not warrant the accuracy, completeness or reliability of the information contained herein. All content and information are provided on an “as is” basis only, without any representations
or warranties, express or implied, of any kind, including representations about the suitability of these products or informat ion for any purpose. Azoteq disclaims all warranties and
conditions with regard to these products and information, including but not limited to all implied warranties and conditions of merchantability, fitness for a particular purpose, title
and non-infringement of any third party intellectual property rights. Azoteq assumes no liability for any damages or injury arising from any use of the information or the product o r
caused by, without limitation, failure of performance, error, omission, interruption, defect, delay in operation or transmiss ion, even if Azoteq has been advised of the possibility of
such damages. The applications mentioned herein are used solely for the purpose of illustration and Azoteq makes no warranty or representation that such applications will be
suitable without further modification, nor recommends the use of its products for application that may present a risk to human life due to malfunction o r otherwise. Azoteq products
are not authorized for use as critical components in life support devices or systems. No licenses to patents are granted, implicitly, express or implied, by estoppel or otherwise,
under any intellectual property rights. In the event that any of the abovementioned limitations or exclusions does not apply , it is agreed that Azoteq’s total liability for all losses,
damages and causes of action (in contract, tort (including without limitation, negligence) or otherwise) will not exceed the amount already paid by the customer for the products.
Azoteq reserves the right to alter its products, to make corrections, deletions, modifications, enhancements, improvements and other changes to the content and information, its
products, programs and services at any time or to move or discontinue any contents, products, programs or services without pr ior notification. For the most up-to-date information
and binding Terms and Conditions please refer to www.azoteq.com.
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All Rights Reserved.
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