Hardware
Documentation
D at a S h e e t
®
HAR 3927
Robust Dual-Die Programmable
2D Position Sensor with Analog
and SENT Output Interface
Edition June 20, 2022
DSH000215_001EN
HAR 3927
DATA SHEET
Copyright, Warranty, and Limitation of Liability
The information and data contained in this document are believed to be accurate and reliable. The software and proprietary information contained therein may be protected by
copyright, patent, trademark and/or other intellectual property rights of TDK-Micronas. All
rights not expressly granted remain reserved by TDK-Micronas.
TDK-Micronas assumes no liability for errors and gives no warranty representation or
guarantee regarding the suitability of its products for any particular purpose due to
these specifications.
By this publication, TDK-Micronas does not assume responsibility for patent infringements
or other rights of third parties which may result from its use. Commercial conditions, product availability and delivery are exclusively subject to the respective order confirmation.
Any information and data which may be provided in the document can and do vary in
different applications, and actual performance may vary over time.
All operating parameters must be validated for each customer application by customers’
technical experts. Any mention of target applications for our products is made without a
claim for fit for purpose as this has to be checked at system level.
Any new issue of this document invalidates previous issues. TDK-Micronas reserves
the right to review this document and to make changes to the document’s content at any
time without obligation to notify any person or entity of such revision or changes. For
further advice please contact us directly.
Do not use our products in life-supporting systems, military, aviation, or aerospace
applications! Unless explicitly agreed to otherwise in writing between the parties,
TDK-Micronas’ products are not designed, intended or authorized for use as components in systems intended for surgical implants into the body, or other applications
intended to support or sustain life, or for any other application in which the failure of the
product could create a situation where personal injury or death could occur.
No part of this publication may be reproduced, photocopied, stored on a retrieval system or transmitted without the express written consent of TDK-Micronas.
TDK-Micronas Trademarks
– HAR, 3D HAL
Third-Party Trademarks
All other brand and product names or company names may be trademarks of their
respective companies.
License Note
HAR 3927 uses licenses of Fraunhofer Institute for Integrated Circuits IIS.
TDK-Micronas GmbH
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DATA SHEET
Contents
Page
Section
Title
5
6
7
1.
1.1.
1.2.
Introduction
Major Applications
Main Features
8
8
2.
2.1.
Ordering Information
Device-Specific Ordering Codes
10
10
11
12
12
14
21
22
24
25
26
27
28
28
29
30
31
31
31
3.
3.1.
3.2.
3.3.
3.3.1.
3.3.2.
3.4.
3.4.1.
3.4.2.
3.4.3.
3.4.4.
3.4.5.
3.4.6.
3.4.7.
3.4.8.
3.4.9.
3.4.10.
3.4.11.
3.4.12.
Functional Description
General Function
Signal Path
Register Definition
RAM Registers
EEPROM Registers
SENT Output Protocol
H.1 Format: 6 Data Nibble Frame with Two Fast Channels
H.2 Format: 3 Data Nibble Frame with One Fast Channel
H.4 Format: Secure Single Sensors with 12-bit Fast Channel
Error Diagnostic Reporting on Fast Channel and Status Bits
Pause Pulse
CRC Implementation
Slow Channel: Enhanced Serial Message
Slow Channel: Serial Message Sequence
Slow Channel: Serial Message Error Codes
Slow Channel: Sensor Types
Start-Up Behavior
Message Time for SENT Frames in PP Mode
32
32
32
4.
4.1.
4.2.
Functional Safety
Functional Safety Manual and Functional Safety Report
Integrated Diagnostic Mechanism
34
34
36
36
36
36
37
38
39
40
44
44
45
45
46
48
5.
5.1.
5.2.
5.3.
5.4.
5.5.
5.6.
5.7.
5.8.
5.9.
5.10.
5.10.1.
5.10.2.
5.10.3.
5.11.
5.12.
Specifications
Outline Dimensions
Soldering, Welding, Assembly
Storage and Shelf Life
Size of Sensitive Area
Definition of Magnetic-Field Vectors
Pin Connections and Short Description
Absolute Maximum Ratings
Recommended Operating Conditions
Characteristics
Notes for Electrical Characteristics
Power-On Operation
Definition of Parameter INL and absolute D/A Converter Error
Definition of Rise and Delay Time of Output
Magnetic Characteristics
Temperature Sensor
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Contents, continued
Page
Section
Title
49
49
49
50
52
6.
6.1.
6.2.
6.3.
6.4.
Application Notes
Ambient Temperature
EMC and ESD
Application Circuit for HAR 3927
Recommended Pad Size SOIC8 Package
53
53
54
54
7.
7.1.
7.2.
7.3.
Programming of the Sensor
Programming Interface
Programming Environment and Tools
Programming Information
56
8.
Document History
TDK-Micronas GmbH
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HAR 3927
DATA SHEET
Robust Dual-Die Programmable 2D Position Sensor
with Analog and SENT Output Interface
Release Note: Revision bars indicate significant changes to the previous document
1. Introduction
HAR 3927 is a member of a new generation of TDK-Micronas 2D position sensors based
on TDK-Micronas’ 3D HAL® technology addressing the need for ISO 26262 compliant
development. The device is a high-resolution position sensor for highly accurate position
measurements. It provides full redundancy due to two independent dies stacked in a
single package, each electrically connected to the pins of one package side.
The stacked-die architecture ensures that both dies occupy the same magnetic-field
position, thus generating synchronous measurement outputs.
HAR 3927 features a linear, ratiometric analog output signal with integrated wire-break
detection working with pull-up or pull-down resistors as well as an SAE J2716 compliant
SENT output according to rev. 4.
The HAR 3927 is based on the Hall technology and is able to measure horizontal and
vertical magnetic-field components BX, BY and BZ.
Based on the signals of two magnetic-field components out of BX, BY or BZ, the device
can measure 360° angular range and linear movements.
On-chip signal processing calculates one angle out of two orthogonal magnetic-field
components and converts this value into an output signal. Additionally to the built-in signal processing, the sensor features an arbitrary programmable characteristic, e.g. for
linearization of the output signal via up to 33 setpoints (17 variable or 33 fixed).
Major characteristics like gain and offset, reference position, etc. can be adjusted to the
magnetic circuitry by programming the non-volatile memory.
This product is defined as SEooC (Safety Element out of Context) ASIL B ready according
to ISO 26262.
The device is designed for automotive and industrial applications. It operates in the
ambient temperature range from 40 C...150 °C.
The sensor is available in the eight-pin SOIC8 SMD package.
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1.1. Major Applications
Thanks to the sensor’s versatile programming characteristics and its high accuracy, the
HAR 3927 is a potential solution for the following application examples:
– Linear movement measurements in dual-clutch transmissions, engine stroke sensors,
clutch pedal, as well as cylinder and valve position measurements
– Rotary position measurement in gear selectors, rotary selectors with push function,
rear-axis steering, electronic throttle control, accelerator pedal, etc.
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1.2. Main Features
– Accurate angular measurement up to 360° and linear position detection
– SEooC ASIL B ready according to ISO 26262 to support Functional Safety applications
– Operates from 4.5 V up to 5.5 V supply voltage
– 12 bit ratiometric linear analog output
– Up to 8 kSps sampling frequency
– Operates from 40 °C up to 170 °C junction temperature
(Max. Ambient Temperature: TA,absmax = 160 °C)
– Programming via the sensor’s output pin. No additional programming pin required
– Various configurable signal processing parameters, like output gain and offset, reference position, temperature-dependent offset, etc.
– Programmable arbitrary output characteristic with 17 variable or 33 equidistant
distributed setpoints
– Programmable characteristics in a non-volatile memory (EEPROM) with redundancy
and lock function
– Read access on non-volatile memory after customer lock
– On-Board diagnostics of different functional blocks of the sensor
– Short-circuit protected push-pull output
– Overvoltage and reverse-voltage protection
– Under- and overvoltage detection of VSUP
– Integrated wire-break detection with pull-up or pull-down resistor
– SENT according to SAE J2716 rev. 4
• Support of four different frame formats
• H.1 format: Two 12-bit Fast Channels
(supporting A.1 Dual Throttle Position Sensors)
• H.2 format: One 12-bit Fast Channel
• H.4 format: Secure sensor with 12-bit Fast Channel 1 and secure sensor information on Fast Channel 2
• Enhanced 8-bit ID serial message format including temperature information
• Programmable tick time between 1.5 µs and 12 µs
• Low time of 3, 4, 5 and 6 ticks
• Transmission of OEM ID’s via Slow Channel
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2. Ordering Information
A Micronas device is available in a variety of delivery forms. They are distinguished by a
specific ordering code:
XXX NNNN PA-RRRR-C-P-Q-SP
Further Code Elements
ROM/EEPROM Version
Package
Product Type
Product Group
Fig. 2–1: Ordering code principle
For a detailed information, please refer to the brochure:
“Micronas Sensors and Controllers: Ordering Codes, Packaging, Handling”.
2.1. Device-Specific Ordering Codes
The HAR 3927 is available in the following package.
Table 2–1: Available packages
Package Code (PA)
Package Type
DJ
SOIC8
For available variants for Configuration (C), Packaging (P), Quantity (Q), and Special
Procedure (SP) please contact TDK-Micronas.
Table 2–2: Ordering Information
Product
Package
ROM/EEPROM
Version
Further Code
[-C-P-Q-SP]
HAR3927
DJ = SOIC8
4301
See TDK-Micronas
Ordering Information
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DATA SHEET
Table 2–3: Available ordering codes and corresponding package marking
Ordering Code
Package Marking
HAR3927DJ-4301[-C-P-Q-SP]
Description
Line 1: Product Type / ROM-ID
Line 2: Lot number
R39274301
Lot number
YWWD SB
Line 3: Date code / Special
Procedure SB (optional)
For available variants for Configuration (C), Packaging (P), Quantity (Q), and Special
Procedure (SP) please contact TDK-Micronas.
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DATA SHEET
3. Functional Description
3.1. General Function
HAR 3927 is a 2D position sensor based on TDK-Micronas’ 3D HAL technology. It is a
dual-die integrated circuit with fully redundant signals. Each die includes two vertical
and one horizontal Hall-plate for the detection of X, Y, or Z magnetic-field components,
a signal processor for calculation and signal conditioning of two magnetic-field components, protection devices, and a ratiometric analog or SENT output.
The Hall-plate signals are measured by two A/D converters, filtered and temperature
compensated. Offset compensation by spinning current minimizes the errors due to
supply voltage and temperature variations as well as external package stress. A linearization block can be used optionally to reduce the overall system non-linearity error, due
to mechanical misalignment, magnet imperfections, etc.
Overall, the in-system calibration can be utilized by the system designer to optimize performance for a specific system. The calibration information is stored in an on-chip
memory.
The calculated position information is provided as a ratiometric analog output voltage
proportional to the position or via SENT frames according to SAE J2716 rev.4.
The HAR 3927 is programmable by modulation of the output voltage. No additional programming pin is needed and fast end-of-line programming is enabled.
VSUP1
VSUP2
Internally
Stabilized
Supply and
Protection
Devices
Temperature
Dependent
Bias
Open-Circuit,
Overvoltage,
Undervoltage,
Detection
OSC
Protection
Devices
TEST1
TEST2
Pixel
Cell
X/Y/Z
MUX
MUX
A
D
DSP
A
17/33
Setpoints
Linearization
D
Interpolator
D
A
Analog
Output
SENT
formatter
OUT1
OUT2
EEPROM Memory
A
D
GND1
μC
Temperature
Sensor
Programming
Interface
OTP
Lock Control
GND2
Fig. 3–1: HAR 3927 block diagram
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DATA SHEET
3.2. Signal Path
The DSP part of this sensor performs the signal conditioning. The parameters for the
DSP are stored in the memory registers. Details of the overall signal path are shown in
Fig. 3–2.
OFFSET_CH1_0...2
GAIN_CH1_0...2
CUST_COMP_CH1
meas_config
COMP_CH1
Channel 1
A
D
X
Y
DEC
fdecsel
PHASE_CORRECTION_CH12
LOW_PASS_FILTER
OFFSET_CH2_0...2
GAIN_CH2_0...2
Angle
Calculation
COMP_CH2
Channel 2
Z
Customer
Offset & Gain
Trimming
LP
A
D
Phase
Correction
Channel 1/2
DEC
Customer
Offset & Gain
Trimming
LP
PHASE_CORR_CH2
CUST_COMP_CH2
MAG_LOW
MAG_HIGH
AMPLITUDE
OFFSET_SENT_TEMP
GAIN_SENT_TEMP
Calculation of
Signal Sum of
Squares
TEMP_ADJ
SENT
Temp
SCALE
°C
ANGLE_AMP
ANGLE_OUT
REF_ANGLE_OUT MODULO_OUT
REF
ANGLE
MOD
SETPOINT_IN
SP
SCALE
Setpoint
Linearization
SETPOINT_OUT
DNC
Filter
SCALE_OUT
DNC_OUT
OUT
SCALE
SENT configuration
OUT
SENT
Interface
Clamping
analog_interpol
REF_ANGLE_0...2
modulo
nmult
SP_GAIN
SP_OFFSET
SENTOUT
error_band
SP0...35 nspgain dnc_-3dB_frequency OUT_OFFSET_0...2 CLAMP_LOW
variable_setpoints dnc_threshold
CLAMP_HIGH
OUT_GAIN_0...2
Interpolator
D
A
VOUT
EEPROM registers
EEPROM settings
RAM registers
Sensor interfaces
Fig. 3–2: Signal path of HAR 3927 (equal for both dies)
The sensor signal path contains two kinds of registers. Registers that are read-only and
programmable registers (non-volatile memory). The read-only (RAM) registers contain
measurement data at certain steps of the signal path and the non-volatile memory registers (EEPROM) change the sensor’s signal processing. EEPROM settings are individually configurable bits within an EEPROM register.
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DATA SHEET
3.3. Register Definition
3.3.1. RAM Registers
TEMP_ADJ
The TEMP_ADJ register already contains the TDK-Micronas compensated digital value
of the sensor’s junction temperature.
COMP_CH1 and COMP_CH2
COMP_CH1 and COMP_CH2 registers contain the temperature-compensated magnetic-field information of channel 1 and channel 2.
AMPLITUDE
The AMPLITUDE register contains the sum of squares of the magnetic-field amplitude
of the two signals calculated with the following equation. This information is used for the
magnet loss detection:
2
AMPLITUDE =
2
COMP_CH1
COMP_CH2
---------------------------+ ---------------------------32768
32768
CUST_COMP_CH1 and CUST_COMP_CH2
CUST_COMP_CH1 and CUST_COMP_CH2 register contain the customer-compensated magnetic-field information of channel 1 and channel 2 used for the angle calculation. These registers contain already the customer phase-shift, gain and offset corrected data.
PHASE_CORR_CH2
PHASE_CORR_CH2 register contains the customer compensated magnetic-field information of channel 2 after customer phase-shift error correction using the
PHASE_CORRECTION_CH12 register.
ANGLE_OUT
The ANGLE_OUT register contains the digital value of the position calculated by the
angle calculation algorithm.
REF_ANGLE_OUT
The REF_ANGLE_OUT register contains the digital value of the angle information after
setting the reference angle defining the zero angle position.
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MODULO_OUT
The MODULO_OUT register contains the digital value of the angle information after
applying the modulo calculation algorithm.
SETPOINT_IN
The SETPOINT_IN register contains the digital value of the angle information after the
setpoint scaling block and are the values used for the input of the setpoint linearization
block.
SETPOINT_OUT
The SETPOINT_OUT register contains the digital value of the angle information after
the setpoint linearization block.
DNC_OUT
The DNC_OUT register contains the digital value of the angle information after the DNC
filter.
SCALE_OUT
The SCALE_OUT register contains already the position information after the customer
output scaling using the OUT_GAIN and OUT_OFFSET registers.
OUT
The OUT register contains the digital value of the angle information after all signal
processing steps and depends on all customer configuration settings.
DIAGNOSIS
The DIAGNOSIS_0 and DIAGNOSIS_1 registers report certain failures detected by the
sensor. HAR 3927 performs self-tests during power-up as well as continued system
integrity tests during normal operation. The result of those tests is reported via the
DIAGNOSIS_X registers.
Micronas IDs
The MIC_ID1 and MIC_ID2 registers are both 16 bit organized. They are read-only and
contain TDK-Micronas production information, like X,Y position on the wafer, wafer
number, etc. This register content will be send via the SENT interface if the serial message channel has been activated.
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3.3.2. EEPROM Registers
Customer IDs
The customer ID registers (CUSTOMER_ID0 to CUSTOMER_ID9) consist of ten 16-bit
words and can be used to store customer production information, like serial number,
project information, OEM codes, etc. The customer IDs will be part of the SENT Slow
Channel in case that the SENT output is activated and transmission via Slow Channel is
selected as well.
Magnetic Range Check
The magnetic range check uses the AMPLITUDE register value and compares it with
an upper and lower limit threshold defined by the customer programmable registers
MAG_LOW and MAG_HIGH. If either low or high limit is exceeded, the sensor will indicate an error.
Mag-Low Limit
MAG_LOW defines the low level for the magnetic-field range check function.
Mag-High Limit
MAG_HIGH defines the high level for the magnetic-field range check function.
Phase Correction
PHASE_CORRECTION_CH12 can be used to compensate a phase-shift of channel 2
in relation to channel 1.
Neutral value for the register is zero (no phase-shift correction).
Low-Pass Filter
With the LOW_PASS_FILTER register it is possible to select different 3 dB cutoff
frequencies for HAR 3927. The default value is zero (low-pass filter disabled). The filter
frequency is valid for both channels.
Gain for Channel 1 and 2
GAIN_CH1_0...2 and GAIN_CH2_0...2 can be used to compensate amplitude mismatches between channel 1 and channel 2. TDK-Micronas delivers pre calibrated sensors with compensated gain mismatch. Nevertheless, it is possible that due to the magnetic circuit a mismatch between the channels occurs.
In addition a temperature-dependent gain can be added for both channels.
GAIN_CHx_0...2 supports a polynomial of 2nd order. This means that a constant, linear
and quadratic gain factor can be programmed.
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Customer Offset
OFFSET_CH1_0...2 and OFFSET_CH2_0...2 can be used to compensate a remaining
offset in channel 1 and channel 2. TDK-Micronas delivers pre calibrated sensors. Nevertheless it is possible that due to the magnetic circuit an offset in channel 1 and 2
occurs. This can be compensated with OFFSET_CHx_0...2.
The customer offset can have a temperature coefficient to follow the temperature coefficient of a magnet. The customer offset consists of a polynomial of second order. This
means that a constant, linear and quadratic offset factor can be programmed.
Reference Angle Position
The output signal zero position defines the reference position for the angle output and
therefore it is possible to shift the discontinuity in the output characteristics out of the
measurement range with these parameters. It can be set to any value of the angular
range.
REF_ANGLE_0...2 defines a polynomial of second order with REF_ANGLE_0 (constant part), REF_ANGLE_1 (linear part) and REF_ANGLE_2 (quadratic part).
360°
270°
90°
0°
180°
Fig. 3–3: Example definition of zero degree point
Setpoint Gain
SP_GAIN and nmult define the gain of the input signal for the linearization block. They
are used to scale the position information to the input range of the linearization block.
Setpoint Offset
SP_OFFSET defines the offset of the input signals for the linearization block. They are
used to scale the position information to the input range of the linearization block.
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Setpoint Linearization
The setpoint linearization block enables the linearization of the sensor’s output characteristic for the customer’s application. For fixed setpoints it consists of 33 setpoints
(SP0, SP1, ..., SP32). Each setpoint is defined by its fixed X position and its programmable Y value. The setpoint X positions (SP(n)_X) are equally distributed between
32768... 32767 LSB.
The setpoint registers have a length of 16 bits and are two’s complement coded. Therefore the setpoint Y values (SP(n)_Y) can vary between 32768...32767 LSB.
Alternatively 17 variable setpoints can be used. In this case the 17 setpoint X positions
and 19 setpoint Y values (the first corresponds to position 32768 and the last to
32767) are freely programmable.
The SETUP_DATAPATH[1:0] bits (= variable_setpoints) offer the selection between 33
fixed and 17 variable setpoints and if the setpoint Y values are stored absolutely or differentially to their setpoint X positions.
The setpoint register values are initially set to 0 (neutral) by default. The setpoint linearization block works in a way that the incoming signal (SETPOINT_IN value) is interpolated linearly between two adjacent setpoints (SP(n) and SP(n+1)). The resulting
SETPOINT_OUT register value represents the angular information after the setpoint
scaling.
nspgain
The SETUP_DATAPATH[5:2] bits (= nspgain) set the gain exponent for the internal setpoint slope calculation, which is used for variable setpoints only.
DNC Filter Register (dnc_–3dB_frequency & dnc_threshold)
The DNC (Dynamic Noise Cancellation) filter decreases the output noise significantly by
adding a low-pass filter with a very low cut-off frequency for signals below a certain signal change threshold (dnc_threshold, DNC[15:8]).
The attenuation factor dnc_–3 dB_frequency of this IIR filter can be selected by the bits
DNC[7:0] of the DNC register. Both parameters have a length of 8 bits.
For dnc_threshold only values from 0 to 255 are allowed. For the dnc_–3 dB_frequency
only cut-off frequencies up to 50% of the sample frequency (0.5*fdecsel) are allowed.
To disable the DNC filter both registers must be set to 0.
Clamping Levels (CLAMP_LOW & CLAMP_HIGH)
The clamping levels CLAMP_LOW and CLAMP_HIGH define the maximum and minimum output values. The two registers have a bit length of 16 bit. Both clamping levels
can have values between 0% FS and 100% FS.
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DATA SHEET
Output Gain
OUT_GAIN_0...2 defines the final gain scaling for the desired output signal. It can also
be used to invert the output signal. The register has a length of 16 bit. OUT_GAIN_0...2
supports a polynomial of 2nd order. This means that a constant, linear and quadratic
gain factor can be programmed.
Output Offset
OUT_OFFSET_0...2 defines the final offset scaling for the desired output signal. The
register has a length of 16 bit. OUT_OFFSET_0...2 supports a polynomial of 2nd order.
Hence, a constant, linear and quadratic offset factor can be programmed.
Interpolator (analog_interpol)
HAR 3927 features a programmable interpolator before the D/A converter. The interpolator provides a linear interpolation between two successive 8 kHz samples, resulting in
an increased update rate at the input of the DAC.
The benefit of this block are reduced amplitude steps by a factor of 32, resulting in a
smoother DAC analog output and reduced out-of-band noise.
Please note, that the interpolator does not change the overall signal bandwidth.
The interpolator can be switched on and off.
SENT Temperature Scaling
If SENT H.1 Format of secondary output (2nd fast channel SENT) is selected, the registers OFFSET_SENT_TEMP and GAIN_SENT_TEMP can be used for offset and gain
scaling of the digital value of the sensor’s junction temperature.
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Customer Configuration Registers
SETUP_FRONTEND, SETUP_DATAPATH, SETUP_OUTPUT and SETUP_SUPERVISION
registers are 16-bit registers that enable the customer to activate various functions of
the sensor. The table below describes in detail the available combinations and resulting
functions.
Table 3–1: SETUP_FRONTEND
Bit No. Function
Description
15:9
–
Reserved
8
customer_burnin
Customer burn-in mode
0: disabled
1: activated
7:6
fdecsel
Decimation frequency:
00: 2 kSps
01: 4 kSps
10: 8 kSps
11: reserved
5:2
–
Reserved
1:0
meas_config
Measurement configuration
00: CH1: X CH2: Y
01: CH1: X CH2: Z
10: CH1: Y CH2: Z
11: reserved
Table 3–2: SETUP_DATAPATH
Bit No. Function
Description
15
fusa_en
Functional Safety support
0: Limited FuSa support
1: Full FuSa support
Note: If fusa_en = 0 (SETUP_DATAPATH[15] = 0) not all Functional Safety diagnostic
mechanisms are active. In this configuration, HAR 3927 is not defined as SEooC
ASIL B ready according to ISO 26262. Further details can be found in Section 4. on
page 32.
14:13
-
Reserved
12:11
modulo
Modulo operation:
00: No Modulo
01: Modulo 90°
10: Modulo 120°
11: Modulo 180°
10:8
nmult
Gain exponent for SETPOINT_IN channel 1
SP_Gain = SP_GAIN x 2nmult
7:6
–
Reserved
5:2
nspgain
Gain exponent for internal setpoint slope calculation (only for variable setpoints)
Slope = SPGn x 2nspgain+1
1:0
variable_setpoints
Fixed/variable setpoints:
00: fixed setpoints, absolutely stored SP_Y values
01: fixed setpoints, differentially stored SP_Y values
10: variable setpoints, absolutely stored SP_Y values
11: variable setpoints, differentially stored SP_Y values
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Table 3–3: SETUP_OUTPUT
Bit No. Function
Description
15:14
Primary output protocol selection:
00: Analog
01: SENT
10: reserved
11: reserved
primary_output
Analog Output (SETUP_OUTPUT[15:14] = 00)
13:1
–
Reserved
0
analog_interpol
Analog output interpolator:
0: off
1: on
SENT Output (SETUP_OUTPUT[15:14] = 01)
13
–
Reserved
12
secondary_output
0: ANGLE_AMP
1: TEMP_SENT
11:8
sent_slew_rate
Slew rate control:
0xxx: slew rate control disabled
1000: Fall: 5V/1.0µs, Rise: 5V/1.0µs
1001: Fall: 5V/1.0µs, Rise: 5V/1.5µs
1010: Fall: 5V/1.2µs, Rise: 5V/1.2µs
1011: Fall: 5V/1.2µs, Rise: 5V/2.7µs
1100: Fall: 5V/1.6µs, Rise: 5V/1.6µs
1101: Fall: 5V/1.6µs, Rise: 5V/5.2µs
1110: Fall: 5V/2.7µs, Rise: 5V/2.7µs
1111: Fall: 5V/2.7µs, Rise: 5V/10.3µs
Measured from/to 1.1V to/from 3.8 V with CL =4.7 nF, VSUP = 5V
7
sent_synchronicity
Synchronicity mode:
0: SENT Continuous
1: SENT with Pause Pulse
6:4
sent_tick_time
SENT tick time selection (typ. value):
000: reserved
001: 1.50 µs
010: 2.00 µs
011: 2.50 µs
100: 2.75 µs
101: 3.00 µs
110: 6.00 µs
111: 12.0 µs
Note: Not all combinations of tick time and repetition rate are possible.
3:0
sent_repetition_rate
SENT data rate
0000: reserved
0001: reserved
0010: 2.66 kHz
0011: 2 kHz
0100: 1.6 kHz
0101: 1 kHz
0110: 0.8 kHz
0111: 0.5 kHz
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SENT message length (PPC)
1000: 225 ticks
1001: 239 ticks
1010: 250 ticks
1011: 269 ticks
1100: 294 ticks
1101: 366 ticks
1110: 375 ticks
1111: 450 ticks
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Table 3–4: SETUP_SUPERVISION
Bit No. Function
Description
15
customer_lock
Customer lock
0: unlocked
1: locked
14:13
overcurrent_
configuration
Overcurrent configuration
customer_lock = 0 (SETUP_SUPERVISION[15] = 0)
xx: entering Listen Mode via OUT Pin always enabled
customer lock = 1 (SETUP_SUPERVISION[15] = 1)
00: entering Listen Mode via OUT Pin enabled
01: entering Listen Mode via OUT Pin disabled. In case of an overcurrent event, output goes to tristate and returns to Application Mode after approx. 80 ms
10: entering Listen Mode via OUT Pin disabled. Output continues driving also in
case of overcurrent.
11: reserved
12
–
Reserved
11:10
short_current_limit
Short current limitation levels (only valid for Analog, in SENT mapped to 00)
00: 19.0 mA
01: 22.0 mA
10: 25.5 mA
11: 28.5 mA
9:8
overcurrent_level
Overcurrent (OC) detection levels (only valid for Analog, in SENT mapped to 00)
00: on: 4.75 mA, off: 3.75 mA
01: on: 8.5 mA, off: 7.5 mA
10: on: 12.5 mA, off: 11.5 mA
11: on: 16.5 mA, off: 15.5 mA
7
dis_temp_sup
Temperature supervision
0: enabled
1: disabled
Note: If dis_temp_sup = 1 (SETUP_SUPERVISION[7] = 1) is selected, the temperature range supervision as well as the plausibility check of the redundant temperature
sensor are disabled. In this case, HAR 3927 is not defined as SEooC ASIL B ready
according to ISO 26262. Further details can be found in Section 4. on page 32.
6
–
Must be set to 1
5:4
ov_level
Overvoltage threshold
00: 9.3 V
01: 5.7 V
10: reserved
11: reserved
3:2
uv_level
Undervoltage threshold
00: 3.8 V
01: 4.1 V
10: 4.25 V
11: reserved
1
–
Must be set to 0
0
error_band
Error band mode
0: low level on error
1: high level on error
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3.4. SENT Output Protocol
The HAR 3927 complies with the SAEJ2716 standard rev.4 and supports the following
three frame formats:
– H.1 Format: Two 12-bit Fast Channels
• A.1 Dual Throttle Position Sensors: 3 nibble position information and 3 nibble negated position
information (1-position)
• A.7 Position Sensors: 3 nibble position information and 3 nibble temperature information or
magnetic-field amplitude
– H.2 Format: One 12-bit Fast Channel (3 nibble position information)
– H.4 Format: Secure Single Sensors with 12-bit Fast Channel (3 nibble position information) and 12-bit Secure Sensor Information
All frame formats are customer selectable via bits (Table 3–3 on page 19 and Table 3–5).
Beside the supported frame formats, a lot of other SENT interface parameter can be
configured by the customer, like tick time, pause pulse, start-up behavior, transmission
of error codes, serial message channel content, etc. All configurable parameter are
defined in Table 3–3, Table 3–5 and Table 3–14.
In SENT output mode, the unidirectional communication from the sensor to a receiver
module (e.g. an Electronic Control Unit) occurs independently of any action of the
receiver module. It does not require any synchronization signal from the receiver module and does not include a coordination signal from the controller/receiving devices.
Table 3–5: SETUP_PROTOCOL
Bit No. Function
Description
15:14
sent_channel_format
SENT fast channel data format:
00: H.2, CH1 primary channel
01: H.4, CH1 primary channel, CH2 secure counter
10: H.1 - A1, CH1 primary channel, CH2 inverse primary channel
11: H.1 - A.7, CH1 primary channel, CH2 secondary channel
13:12
sent_low_time
SENT low time:
00: 3 ticks
01: 4 ticks
10: 5 ticks
11: 6 ticks
11
sent_crc_type
CRC type:
0: CRC acc. SAEJ2716 rev. 2010
1: legacy CRC acc. SAEJ2716 rev. 2008
10
sent_status_crc
Include status nibble in CRC
0: disabled (conformal to SENT)
1: enabled
9
sent_wakeup_behaviour
SENT start-up behavior:
0: send 4094 during start-up
1: send 0 during start-up
8
-
Reserved
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Table 3–5: SETUP_PROTOCOL, continued
Bit No. Function
Description
7
-
Reserved
6
sent_error_status
SENT error status bits (see Section 3.4.4. on page 26):
0: always zero
1: according to SENT SAE J2716
5
sent_fast_error_codes
SENT transmission of error codes on fast channel
0: disabled
1: enabled
4
sent_slow_channel_format
Slow serial channel format:
0: No serial message channel
1: 12-bit enhanced serial message format
3:1
sent_slow_channel_content
Selection which blocks have to be send in addition to block 1 in the slow
channel:
xx1: Block 2
x1x: Block 3
1xx: Block 4+5
0
sent_sdf
SENT SDF mode:
0: Send diagnosis info in front of every block
1: Send diagnosis info in front of every ID
3.4.1. H.1 Format: 6 Data Nibble Frame with Two Fast Channels
In this SENT mode the sensor transmits SENT frames with 6 data nibbles.
Two different application specific protocols are supported:
– A.1 Dual Throttle Position Sensors
– A.7 Position Sensors
In case of A.1 the first 3 data nibbles contain a 12-bit position information and the second 3 data nibbles contain the negated position of the first 3 nibbles (1-position).
In case of A.7 the first 3 data nibbles contain a 12-bit position information and the second 3 data nibbles contain a 12-bit temperature information or 12-bit magnetic-field
amplitude information (customer configurable: Table 3–3). They are formatted according to Table 3–6.
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Table 3–6: Nibble description for H.1 A.1 format
Pulse
Remarks
#
Description
1
Synchronization/
Calibration
It is mandatory to measure the synchronization / calibration
period for calibration of the clock tick time ttick at the ECU
2
4-bit Status &
Communication Nibble
Status [0...1]: According selection in Table 3–5
Status [2...3]: According selection in Table 3–5
3
4-bit Data Nibble MSN 1 Position Value [11:8]
4
4-bit Data Nibble MidN 1 Position Value [7:4]
5
4-bit Data Nibble LSN 1
Position Value [3:0]
6
4-bit Data Nibble LSN 2
Negated Position Value[3:0]
7
4-bit Data Nibble MidN 2 Negated Position Value[7:4]
8
4-bit Data Nibble MSN 2 Negated Position Value[11:8]
9
4-bit CRC Nibble
According selection in Table 3–5
10
Pause Pulse
According selection in Table 3–3
Table 3–7: Nibble description for H.1 A.7 format
Pulse
Remarks
#
Description
1
Synchronization/
Calibration
It is mandatory to measure the synchronization / calibration
period for calibration of the clock tick time ttick at the ECU
2
4-bit Status &
Communication Nibble
Status [0...1]: According selection in Table 3–5
Status [2...3]: According selection in Table 3–5
3
4-bit Data Nibble MSN 1 Position Value [11:8]
4
4-bit Data Nibble MidN 1 Position Value [7:4]
5
4-bit Data Nibble LSN 1
Position Value [3:0]
6
4-bit Data Nibble LSN 2
Value [3:0] -> According selection in Table 3–5 on page 21
7
4-bit Data Nibble MidN 2 Value [7:4] -> According selection in Table 3–5 on page 21
8
4-bit Data Nibble MSN 2 Value [11:8] -> According selection in Table 3–5 on page 21
9
4-bit CRC Nibble
According selection in Table 3–5
10
Pause Pulse
According selection in Table 3–3
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3.4.2. H.2 Format: 3 Data Nibble Frame with One Fast Channel
Following application-specific protocol is supported:
– A.7 Position Sensors
In this mode, the sensor transmits SENT frames with 3 data nibbles containing 12-bit
position information. They are formatted according to Table 3–8.
Table 3–8: Nibble description for 3 data nibble frame format with one Fast Channel
Pulse
Remarks
#
Description
1
Synchronization/
Calibration
It is mandatory to measure the synchronization / calibration
period for calibration of the clock tick time ttick at the ECU
2
4-bit Status &
Communication Nibble
Status [0...1]: According selection in Table 3–5 on page 21
Status [2...3]: According selection in Table 3–5 on page 21
3
4-bit Data Nibble MSN 1 Position Value [11:8]
4
4-bit Data Nibble MidN 1 Position Value [7:4]
5
4-bit Data Nibble LSN 1
Position Value [3:0]
6
4-bit CRC Nibble
According selection in Table 3–5 on page 21
7
Pause Pulse
According selection in Table 3–3 on page 19
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3.4.3. H.4 Format: Secure Single Sensors with 12-bit Fast Channel
Following application-specific protocol is supported:
– A.7 Position Sensors
In this SENT mode, the sensor transmits SENT frames with 3 data nibbles containing
12-bit position information as well as 3 data nibbles containing 12-bit secure sensor
information. The secure sensor information consists of an 8-bit rolling counter and the
inverted copy of the MSN of the transmitted position information. They are formatted
according to Table 3–9.
Table 3–9: Nibble description for 6 data nibble frame format with secure information
Pulse
Remarks
#
Description
1
Synchronization/
Calibration
It is mandatory to measure the synchronization / calibration
period for calibration of the clock tick time ttick at the ECU
2
4-bit Status &
Communication Nibble
Status [0...1]: According selection in Table 3–5
Status [2...3]: According selection in Table 3–5
3
4-bit Data Nibble MSN 1
Position Value [11:8]
4
4-bit Data Nibble MidN 1
Position Value [7:4]
5
4-bit Data Nibble LSN 1
Position Value [3:0]
6
4-bit Data Nibble MSN 2
Rolling Counter MSN
7
4-bit Data Nibble MidN 2
Rolling Counter LSN
8
4-bit Data Nibble LSN 2
Inverted Copy of Data Nibble MSN 1
9
4-bit CRC Nibble
According selection in Table 3–5
10
Pause Pulse
According selection in Table 3–3
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3.4.4. Error Diagnostic Reporting on Fast Channel and Status Bits
The error diagnostic reporting is customer configurable. By setting bits in the
SETUP_PROTOCOL register (see Table 3–5 on page 21) different error handling can
be activated:
– Always zero: Status bits are always set to zero independent from an error
– Error indication according to SAE J2716 rev. 4: The Status bits are set to one in case
of “sensor error indication” or “sensor functionality and processing error indication”
In addition, the diagnostic can be reported through the 12-bit payload of channel 1 and/
or channel 2. Table 3–10 shows the values that will be sent in case of an internal error.
Table 3–10: Error codes transmitted on Fast Channel 1 and/or 2
Error
Code
A.1 Mode
CH 1
CH 2
CH 1
CH 2
A.1 error code
–
–
4095
4095
Sensor error indication
4091
4091
N/A
N/A
Sensor functionality and processing error indication
4090
4090
–
–
Data Clamping: High
1)
1)
1)
1)
Data Clamping: Low
1)
1)
1)
1)
1)
The output will clamp according to the settings for CLAMP_HIGH and CLAMP_LOW
A description with the mapping of internal errors with “Sensor error indication” and “Sensor functionality and processing error indication” can be found in Table 3–15 on
page 30.
The transmission of error codes on Fast Channel 1 and/or 2 can be deactivated by a
customer EEPROM bit (bit[5] of SETUP_PROTOCOL, Table 3–5 on page 21). The
sensor will then continue to transmit measurement data. Status error bits will be transmitted according to bits[7:6] in the SETUP_PROTOCOL register.
Note
It is not recommended to deactivate the transmission of the error codes on
the Fast Channel 1 and/or 2.
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3.4.5. Pause Pulse
The pause pulse is present at the end of every frame as defined by the SAE J2716
standard. HAR 3927 offers two options:
PPC: The length of the pause pulse is automatically adjusted in order to achieve a constant frame length independent from the message content. The overall length can be
defined by the sent_repetition_rate bits (SETUP_OUTPUT bits[3:0]). Two different
types of PPC are supported. For the first type the overall frame length is defined in fixed
µs steps and for the second type the frame length is adapted to a fixed sample rate (see
Table 3–3 on page 19).
Table 3–11: Message length for PPC (ticks related)
SETUP_OUTPUT [3:0]
1000
1001
1010
1011
1100
1101
1110
1111
ticks PPC
225
239
250
269
294
366
375
450
Following PPC message length are supported for the various frame formats:
Table 3–12: Recommended PPC message length
ticks
PPC
H.1 A.1 Format:
6 Data Nibble
Frame
H.1 A.7 Format:
6 Data Nibble
Frame
H.2 A.7 Format:
3 Data Nibble
Frame
H.4 A.7:
Secure Single
Sensor
PP Length [ticks] PP Length [ticks] PP Length [ticks]
PP Length [ticks]
225
–
–
36
–
239
–
–
50
–
250
–
–
61
–
269
44
–
80
–
294
69
24
105
39
366
141
96
177
111
375
150
105
186
120
450
225
180
261
195
Table 3–13: Message repetition rate for PPC (sampling aligned)
SETUP_OUTPUT [3:0]
0000
0001
0010
0011
0100
0101
0110
0111
frequency PPC [kHz]
2.66
2.00
1.60
1.00
0.80
0.50
NPP: It is also possible that in case of deactivated pause pulse (npp), some samples
may be transmitted twice in series due to the fact that the message time can be shorter
than the sample time. Status[0] bit will then be set to one in case that a sample is transmitted twice.
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3.4.6. CRC Implementation
HAR 3927 is supporting the recommended CRC implementation defined in SAEJ2716
Rev. 4. The Legacy CRC can also be activated by bit[11] in the SETUP_PROTOCOL
register (see Table 3–5 on page 21). It is possible to include the status nibble in the
CRC calculation. This function can be activated by bit[10] in the SETUP_PROTOCOL
register as well.
3.4.7. Slow Channel: Enhanced Serial Message
HAR 3927 supports a Slow Channel according to the Enhanced Serial Message with
12-bit data and 8-bit message ID. It is also possible to deactivate the Slow Channel by
setting bit[4] in the SETUP_PROTOCOL register (see Table 3–5 on page 21).
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3.4.8. Slow Channel: Serial Message Sequence
The device can transmit the serial message sequence shown in Table 3–14. The content/length of the serial message can be tailored by configuration bits in the
SETUP_PROTOCOL register (see Table 3–5 on page 21). It is possible to activate up
to five blocks. Block 1 will always be transmitted if the serial message channel is activated.
Table 3–14: Serial message sequence
Block
#
8-bit ID
Item
12-bit Data
1
1
0x01
Error Codes
(see Table 3–15 on page 30)
2
0x03
Sensor type
(see Section 3.4.10. on
page 31)
Bits 0...11 in CUSTOMER_ID0 register (12 bit)
Examples:
0x050 = not specified position sensor
0x055 = position & secure channel
0x060 = angle sensor
0x064 = angle sensor + secure channel, etc.
3
0x05
Manufacturer
Code
0x007
TDK Manufacturer Code
4
0x06
Protocol Revision
0x004
SAE J2716 rev. 4
5
0x23
Temperature
1 to 4088 temperature data
Temperature information according
SAE J2716
6
0x01
Error Codes
(see Table 3–15 on page 30)
7
0x29
TDK-Micronas SN 8-bit MSB MIC_ID1
Right aligned
8
0x2A
TDK-Micronas SN 8-bit LSB MIC_ID1
Right aligned
9
0x2B
TDK-Micronas SN 8-bit MSB MIC_ID2
Right aligned
10
0x2C
TDK-Micronas SN 8-bit LSB MIC_ID2
Right aligned
11
0x01
Error Codes
(see Table 3–15 on page 30)
Customer configurable
12
0x07
Fast CH1 - X1
Fast channel 1 characteristics
Bits 0...11 in CUSTOMER_ID1 register
13
0x08
Fast CH1 - X2
Fast channel 2 characteristics
Bits 12...15 in CUSTOMER_ID1 register
Bits 0...7 in CUSTOMER_ID2 register
14
0x09
Fast CH1 - Y1
Fast channel 1 characteristics
Bits 8...15 in CUSTOMER_ID2 register
Bits 0...3 in CUSTOMER_ID3 register
15
0x0A
Fast CH1 - Y2
Fast channel 2 characteristics
Bits 4...15 in CUSTOMER_ID3 register
2
3
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Table 3–14: Serial message sequence, continued
Block
#
8-bit ID
Item
12-bit Data
4
16
0x01
Error Codes
(see Table 3–15 on page 30)
17
0x90
OEM Code 1 ID
ASCII character OEM Codes
Bits 0...11 in CUSTOMER_ID4 register
18
0x91
OEM Code 2 ID
ASCII character OEM Codes
Bits 12...15 in CUSTOMER_ID4 register
Bits 0...7 in CUSTOMER_ID5 register
19
0x92
OEM Code 3 ID
ASCII character OEM Codes
Bits 8...15 in CUSTOMER_ID5 register
Bits 0...3 in CUSTOMER_ID6 register
20
0x93
OEM Code 4 ID
ASCII character OEM Codes
Bits 4...15 in CUSTOMER_ID6 register
21
0x01
Error Codes
(see Table 3–15 on page 30)
22
0x94
OEM Code 5 ID
ASCII character OEM Codes
Bits 0...11 in CUSTOMER_ID7 register
23
0x95
OEM Code 6 ID
ASCII character OEM Codes
Bits 12...15 in CUSTOMER_ID7 register
Bits 0...7 in CUSTOMER_ID8 register
24
0x96
OEM Code 7 ID
ASCII character OEM Codes
Bits 8...15 in CUSTOMER_ID8 register
Bits 0...3 in CUSTOMER_ID9 register
25
0x97
OEM Code 8 ID
ASCII character OEM Codes
Bits 4...15 in CUSTOMER_ID9 register
5
Comment
Alternatively, the Error Code can be transmitted as every second Slow Channel message by selecting a bit in the SETUP_PROTOCOL register (see Table 3–5 on page 21)
3.4.9. Slow Channel: Serial Message Error Codes
Diagnostic status codes are transmitted via the serial message. The 8-bit message ID
for the diagnostic status code is 01h. HAR 3927 features the error codes described in
Table 3–15.
Table 3–15: Serial message error codes
Bit Position
Error Type
Fast Channel Error Code
0
Memory self-test error or checksum error
4090
1
ADC error or DSP self-test error
4090
2
Voltage regulator error
4090
3
ADC clipping
4091
4
Invalid temperature sensor values
4090
5
Signal path under/ overflow
CLAMP_LOW/CLAMP_HIGH
6
Overvoltage warning
4091
7
Undervoltage warning
4091
8
Reserved
N/A
9
Hall-plate error
4090
10
Magnet field out of range (MAG_HIGH,
MAG_LOW)
4091
11
Always set to one
–
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3.4.10. Slow Channel: Sensor Types
HAR 3927 can transmit the sensor type information via the Slow Channel. The sensor
type depends on the final customer application and is therefor customer programmable.
The 12-bit value for the sensor type can be directly stored in CUSTOMER_ID0 register.
3.4.11. Start-Up Behavior
HAR 3927 can either transmit frames with value zero until a valid information is available (SAEJ2716 conform) or alternatively frames with 4094. The start-up behavior is
customer configurable by a bit in the SETUP_PROTOCOL register (see Table 3–5 on
page 21).
3.4.12. Message Time for SENT Frames in PP Mode
The SENT frame repetition frequency (sent_repetition_rate in SETUP_OUTPUT[3:0]
register) is defined by the position sampling frequency. The selectable SENT frame repetition frequency is limited by the configured tick time, the transmitted data value and
the minimum and maximum pause pulse duration.
The tick time is customer programmable and can be selected between 1.5 µs and
12 µs.
The pulse low time can be configured to 3, 4, 5 and 6 ticks.
The delivery of new position values is synchronous with the SENT messages, i.e. one
SENT message is transmitted per position sample. Thus, the propagation delay is very
low and the message time is nearly constant.
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4. Functional Safety
4.1. Functional Safety Manual and Functional Safety Report
The Functional Safety Manual for HAR 3927 contains the necessary information to support customers to realize a safety compliant application by integrating HAR 3927, as an
ASIL B ready component, in their system. The Functional Safety Manual will be provided upon request.
The Functional Safety Analysis Report describes the assumed Safety Goal, the corresponding Failure Modes as well as the Base Failure Rate for die and package according to IEC TR 62380. It can be provided based on a TDK-Micronas mission profile as
well as customer mission profiles.
4.2. Integrated Diagnostic Mechanism
HAR 3927 performs self-tests during start-up and normal operation. In order to integrate
HAR 3927 with analog output mode as an ASIL B ready component, the external ECU
on system level has to measure and compare the two analog output signals of the dualdie sensor.
The internal diagnostic mechanisms increase the robustness of the device functionality
by either preventing the sensor to provide wrong output signals or by reporting the failure according SENT definition. For further details about error reporting in case of SENT
output see Section 3.4. on page 21.
Configured to analog output mode, the sensor indicates a fault by switching the output
signal to the selected error band.
The sensor switches the output to ground in case of a VSUP wire break and to VSUP in
case of a GND wire break.
The result of the internal diagnostics is as well available via the DIAGNOSIS_X registers.
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Table 4–1: DIAGNOSIS_0 register
Bit no.
Description when bit is set to 1
15
DSP self-check routines (redundancy or plausibility checks)
14
DSP and µC check of 16-bit checksum covering the EEPROM parameter
13
DSP checksum for ROM and RAM
12
Chip junction temperature out of range
11
Plausibility check of redundant temperature sensor
10
Hall-plate supply too high
9
Hardware overtemperature supervision: Junction temperature > 180°C
8
Reserved
7
One of the A/D converters delivers a stuck signal
6
Overflow or underflow of decimation filter
5
Magnetic field amplitude is above the MAG_HIGH threshold
4
Magnetic field amplitude is below the MAG_LOW threshold
3
The result of the position calculation exceeds the programmed upper threshold register value
(CLAMP_HIGH)
2
The result of the position calculation falls below the programmed lower threshold register value
(CLAMP_LOW)
1
Hall-plate current out of range
0
Reserved
Note: Bit[13] can not be read via the programming interface as they are triggering immediately a reset
of the device. Bit [9] can not be read via the programming interface as the output will not respond.
Table 4–2: DIAGNOSIS_1 register
Bit no.
Description when bit is set to 1
15, 10
Supply Overvoltage
14
General purpose ADC error
13, 11
Supply Undervoltage
12
Bandgap voltage out of range
9
Internal analog voltage out of range
8
Internal digital voltage out of range
7
µC self-test error
6
µC ROM OP code error
5:0
Reserved
Note: Bits[7:6] cannot be read via the programming interface as they are triggering immediately a reset
of the device.
TDK-Micronas GmbH
June 20, 2022; DSH000215_001EN
33
HAR 3927
DATA SHEET
5. Specifications
5.1. Outline Dimensions
Product
4.9 B0.1
D
A
3
4
1
2
PIN 1 INDEX
0
X2
0
Y1
0
Y2
0
D
0.3
A1
0.65
A2
0.24
weight
0.076 g
-X
B ( 20 : 1 )
+X
Y2
6 B0.2
3.9 B0.1
Y1
+Y
HAR3927
X1
gauge plane
X1
D
L
center of
sensitive area
-Y
5
6
B
center of package x/y=0
8
7
0.42
L
1.27
0.25O
C
0.25
X2
A-B
0.6 B0.18
D
0.38x45°
0.22 B0.05
Sn plated
A2
A1
Y2
1.42 B0.1
0.65 B0.11
Y1
8.5° B2°
0.175 B0.075
4° B4°
8.5° B 2°
seating plane
F
0
2.5
B
C
0.1
seating plane
C
5 mm
scale
TOP VIEW
All dimensions are in mm.
Physical dimensions do not include moldflash.
Sn-thickness might be reduced by mechanical handling.
PACKAGE
ISSUE DATE
JEDEC STANDARD
(YY-MM-DD)
ITEM NO.
SOIC8-1
19-05-16
MS-012
BOTTOM VIEW
ANSI
REVISION DATE
(YY-MM-DD)
REV.NO.
F
SPECIFICATION
DRAWING-NO.
ISSUE
TYPE
21-04-22
3
CSOIC0083005.1
ZG
NO.
2105_Ver.03
c Copyright 2018 TDK-Micronas GmbH, all rights reserved
Fig. 5–1:
SOIC8-1: Plastic small outline IC package, 8 leads, gullwing bent, 150 mil
Ordering code: DJ
TDK-Micronas GmbH
June 20, 2022; DSH000215_001EN
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HAR 3927
DATA SHEET
user direction of feed
Ø1
02
18.2 max
Ø330
3
Ø1
12 min
Devices per Reel: 3500
IEC STANDARD
ANSI
ISSUE
ITEM NO.
4th
60286-3
ISSUE DATE
YY-MM-DD
DRAWING-NO.
ZG-NO.
12-01-31
06836.0001.4
ZG002036_001_01
© Copyright 2012 Micronas GmbH, all rights reserved
Fig. 5–2:
SOIC8-1: Dimensions Tape & Reel
TDK-Micronas GmbH
June 20, 2022; DSH000215_001EN
35
HAR 3927
DATA SHEET
5.2. Soldering, Welding, Assembly
Information related to solderability, welding, assembly, and second-level packaging is
included in the document “Guidelines for the Assembly of Micronas Packages”.
It is available on the TDK-Micronas website (https://www.micronas.com/en/service-center/
downloads) or on the service portal (http://service.micronas.com).
5.3. Storage and Shelf Life
Information related to storage conditions of Micronas sensors is included in the document “Guidelines for the Assembly of Micronas Packages”. It gives recommendations
linked to moisture sensitivity level and long-term storage. It is available on the
TDK-Micronas website (https://www.micronas.com/en/service-center/downloads) or on
the service portal (http://service.micronas.com).
5.4. Size of Sensitive Area
Hall-plate area = 125 µm x 125 µm (active area of the complete pixel cell).
See Fig. 5–1 on page 34 for more information on the Hall-plate position.
5.5. Definition of Magnetic-Field Vectors
Note
Die 2 is 180° rotated in relation to die 1. Therefore the measurement values of X and Y components have opposite signs compared to die 1.
TDK-Micronas GmbH
June 20, 2022; DSH000215_001EN
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DATA SHEET
5.6. Pin Connections and Short Description
Table 5–1: Pin connection SOIC8
Pin No.
Pin Name
Type
Short Description
1
VSUP1
SUPPLY
Supply Voltage 1
2
GND1
GND
Ground 1
3
TEST1
I/O
Test 1
4
OUT1
I/O
Output and Programming 1
5
VSUP2
SUPPLY
Supply Voltage 2
6
GND2
GND
Ground 2
7
TEST2
I/O
Test 2
8
OUT2
I/O
Output and Programming 2
Die 1
Die 2
1 VSUP 1
5 VSUP 2
OUT 2
OUT 1
8
4
3
TEST 1
2
GND 1
6
GND 2
7
TEST 2
Fig. 5–3: Pin configuration
Note
Pin TEST1 must be connected to pin GND1 and pin TEST2 must be connected to pin GND2.
TDK-Micronas GmbH
June 20, 2022; DSH000215_001EN
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DATA SHEET
5.7. Absolute Maximum Ratings
Stresses beyond those listed in the “Absolute Maximum Ratings” may cause permanent
damage to the device. This is a stress rating only. Functional operation of the device at
these conditions is not implied. Exposure to absolute maximum rating conditions for
extended periods will affect device reliability.
The device contains circuitry to protect the inputs and outputs against damage due to
high static voltages or electric fields; however, it is advised that normal precautions
must be taken to avoid application of any voltage higher than absolute maximum-rated
voltages to this high-impedance circuit.
All voltages listed are referenced to ground (GNDx).
Symbol
Parameter
Pin
Name
Min.
Max.
Unit
Condition
VSUP
Supply Voltage
VSUPx
8.5
16
V
t = 96 h
18
18
V
t=1h
6
16
V
t = 96 h
6
18
V
t=1h
VOUT
Output Voltage
OUTx
VOUTVSUP Excess of Output Voltage
over Supply Voltage
OUTx,
VSUPx
2
V
t = 96 h
7
V
t=1h
IOUT
Output Short Current
OUTx
30
30
mA
1)
Bmax
Magnetic-Field Amplitude
1
1
T
TJ
Junction Temperature
under Bias
50
190
°C
t = 96 h
TA
Ambient Temperature
40
160
°C
2)
Tstorage
Transportation/Short-Term
Storage Temperature
55
150
°C
Device only without packing material
VESD
ESD Protection
VSUPx,
GNDx,
OUTx,
TESTx
2
2
kV
3) For
VSUP1,
GND1,
OUT1
4
4
kV
3)
Die 1 only
VSUP2,
GND2,
OUT2
4
4
kV
3)
Die 2 only
t = 96 h; output short to
GND or VSUP
all pin combinations (including die 1 to
die 2)
No cumulative stress for all parameter.
Maximum resulting current with applied conditions
2)
For 96 h, not additive. Consider current consumption, mounting condition (e.g. overmold, potting) and
mounting situation for TA in relation to TJ. Please contact TDK-Micronas for other temperature requirements
3)
AEC-Q100-002-Rev H(100 pF and 1.5 k)
1)
TDK-Micronas GmbH
June 20, 2022; DSH000215_001EN
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DATA SHEET
5.8. Recommended Operating Conditions
Functional operation of the device beyond those indicated in the “Recommended
Operating Conditions/Characteristics” is not implied and may result in unpredictable
behavior, reduced reliability and lifetime of the device.
All voltages listed are referenced to ground (GNDx).
Symbol
Parameter
Pin
Name
Min.
Typ.
Max.
Unit
VSUP
Supply Voltage
VSUPx
4.5
5.0
5.5
V
IOUT
Output Current
OUTx
1.9
1.9
mA
RL
Load Resistor
OUTx
2.7
10
k
Pull-Up or Pull-Down
CL
Load Capacitance
OUTx
100
600
nF
Analog output
BiPhase Bit time = 1 kHz
4.7
15
nF
SENT output. 3 s tick time
0°C < Tamb < 55°C
NPRG
Number of Memory
Programming
Cycles
100
cycles
BAMP
Recommended
Magnetic-Field
Amplitude
20
130
mT
TJ
Junction
Temperature 1)
40
170
°C
TA
Ambient Temperature 2)
40
150
°C
1)
2)
Condition
for 1000 h
Depends on the temperature profile of the application. Please contact TDK-Micronas for life-time calculations.
Consider current consumption, mounting condition (e.g. overmold, potting) and mounting situation for TA and
in relation to TJ
Note
It is possible to operate the sensor with magnetic fields down to 5 mT.
For magnetic fields below 20 mT the sensor performance will be reduced.
TDK-Micronas GmbH
June 20, 2022; DSH000215_001EN
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DATA SHEET
5.9. Characteristics
At TA = 40°C to 150°C, VSUPx = 4.5 V to 5.5 V, GNDx = 0 V, after programming and
locking of the sensor, at Recommended Operation Conditions if not otherwise specified
in the column “Conditions”.
Typical Characteristics for TA = 25 °C and VSUPx = 5 V.
Symbol
ISUP
Parameter
Supply Current
Pin
Name
VSUPx
Limit Values
Unit
Conditions
2)
Min.
Typ.
Max.
12.5
mA
fusa_en bit = 0
Current consumption of each
die.
14
mA
2) fusa_en
bit = 1
Current consumption of each
die.
fosc
Internal Oscillator
Frequency
32
MHz
fsample
Sampling Frequency
1.953
kSps
1) Configurable
3.906
7.812
OUTRes
Output Resolution
OUTx
12
bit
1)
BW
Small Signal Bandwidth
(3 dB)
OUTx
2
kHz
1) LP-Filter: OFF, bandwidth
of each channel,
fdecsel bit = 10
(fsample = 8 kSps)
VSUPx
3.6
3.8
4.0
V
uv_level bit = 00
3.8
4.1
4.4
2)
3.95
4.25
4.55
2) uv_level
3.85
4.05
4.25
4.05
4.35
4.65
2) uv_level
bit = 01
2) uv_level
bit = 10
Overvoltage and Undervoltage Detection
VSUP,UVdown
VSUP,UVup
VSUP,OVdown
VSUP,OVup
1)
2)
Undervoltage Detection
Level (down)
Undervoltage Detection
Level (up)
Overvoltage Detection
Level (down)
Overvoltage Detection
Level (up)
VSUPx
VSUPx
VSUPx
4.15
4.45
4.75
8.5
8.9
9.3
5.15
5.45
5.75
8.9
9.3
9.7
5.4
5.7
6.0
V
V
uv_level bit = 01
uv_level bit = 00
ov_level bit = 00
2) ov_level
V
bit = 10
bit = 01
ov_level bit = 00
2) ov_level
bit = 01
Guaranteed by Design
Characterized on small sample size, not tested.
TDK-Micronas GmbH
June 20, 2022; DSH000215_001EN
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HAR 3927
DATA SHEET
Symbol
Parameter
Pin
Name
Limit Values
Unit
Conditions
Min.
Typ.
Max.
0
0.1
V
VSUP = 5 V
10 k RL
0
0.2
V
VSUP = 5 V
5 k RL < 10 k
0
0.35
V
VSUP = 5 V
3 k RL < 5 k
4.9
5.0
V
VSUP = 5 V
10 k RL
4.8
5.0
V
VSUP = 5 V
5 k RL < 10 k
4.65
5.0
V
VSUP = 5 V
3 k RL < 5 k
Open-Circuit Detection
VOUT,VSUPBreak
VOUT,GND-Break
Output Voltage in case of
Supply wire break
Output Voltage in case of
GND wire break
OUTx
OUTx
Power-On Operation
PORup
Power on reset voltage
(up)
VSUPx
3.6
3.8
4.0
V
PORdown
Power on reset voltage
(down)
VSUPx
3.2
3.4
3.6
V
Analog Output Parameter
tstartup
Start-up Time
OUTx
For definition see Fig. 5–4
3.0
ms
2)8)
6.5
ms
2) fusa_en bit = 1
fdecsel bit = 10
fusa_en bit = 0
fdecsel bit = 10
VSUP,DIAG
VSUPx
Supply Voltage required
to get defined Output Voltage Level
2.49
V
VError,Low
Output Voltage Range of
Lower Error Band
0
3
%VSUP
VSUP > VSUP,DIAG
10 k RL
0
4
%VSUP
VSUP > VSUP,DIAG
5 k RL < 10 k
0
7
%VSUP
VSUP > VSUP,DIAG
RL = 3 k
97
100
%VSUP
VSUP > VSUP,DIAG
10 k RL
96
100
%VSUP
VSUP > VSUP,DIAG
5 k RL < 10 k
93
100
%VSUP
VSUP > VSUP,DIAG
RL = 3 k
VError,High
Output Voltage Range of
Upper Error Band
OUTx
OUTx
VError,HighZ,Low
Output Voltage Range of
Low Error Band if output
is in High-Z mode
OUTx
0
7
%VSUP
RL = 3 k
VError,HighZ,High
Output Voltage Range of
High Error Band if output
is in High-Z mode
OUTx
93
100
%VSUP
RL = 3 k
2)
8)
Characterized on small sample size, not tested
If dVSUP/dt < 1 V/ms and uv_level bit = 01 or 10 selected, the startup time is delayed by additional 1.2 ms.
TDK-Micronas GmbH
June 20, 2022; DSH000215_001EN
41
HAR 3927
DATA SHEET
Symbol
Parameter
Pin
Name
Limit Values
Min.
Typ.
Max.
Unit
Conditions
DNL
Differential Non-Linearity
of D/A converter
OUTx
0.9
0.9
LSB
DACINL
Non-Linearity of Output
Stage
OUTx
0.1
0.1
%VSUP
ER
Ratiometric Error of Output
(Error in VOUT/VSUP)
OUTx
0.1
0.1
%VSUP
VOUT,DAC_ERR_R
Absolute D/A converter
error at 25°C
OUTx
0.18
0.18
%VSUP
VOUT,DAC_ERR
Absolute D/A converter
error drift over Temperature related to 25°C
OUTx
0.08
0.08
%VSUP
2)3)
VOUTH
Output High Voltage
OUTx
93
%VSUP
4)
3 k RL
VOUTL
Output Low Voltage
OUTx
7
%VSUP
4)
3 k RL
tr(O)
Rise Time of Output
OUTx
0.100
0.125
ms
2)
LP-Filter: OFF
T
For definition see Fig. 5–5
2)3)
For definition see Fig. 5–5
For definition see Fig. 5–6
td(O)
Delay Time of Output
OUTx
3.5/
fsample
OUTNoise
Output Noise RMS
OUTx
1.7
3.0
mV
2)5)
ROUT,analog
Output Resistance over
Recommended Operating Range in Analog Output Mode
OUTx
0.15
5
VOUTLmax VOUT
VOUTHmin
1)
For fsample, please refer to
page 40. For definition see
Fig. 5–6
Output range 10%VSUP
to 90%VSUP
IC
VOUTx
ROUT = 5
RL = 5 k
GND
1)
Guaranteed by Design
Characterized on small sample size, not tested
3)
The accuracy of the output voltage at clamp low / clamp high voltage over temperature range can be calculated with
the following formula: VOUTCL,CH = (VOUT,DAC_ERR_RT2 + VOUT,DAC_ERR2)(1/2).
4) Signal band area with full accuracy is located between V
OUTL and VOUTH. The sensors accuracy is reduced below
VOUTL and above VOUTH.
5) 4 kHz digital low-pass filter; 20 mT min. magnetic-field amplitude; f
BW = 22.5 kHz
6) Measured from/to 1.1 V to/from 3.8 V with C = 4.7 nF, V
L
SUP = 5 V
2)
TDK-Micronas GmbH
June 20, 2022; DSH000215_001EN
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HAR 3927
DATA SHEET
Symbol
Parameter
Pin
Name
Limit Values
Min.
Typ.
Max.
Unit
Conditions
Recommended SENT load
and 3 µs tick time
SENT Output Parameter
VOL
Output Low Voltage
OUTx
0.5
V
VOH
Output High Voltage
OUTx
4.1
V
trise_sym
Rise Time of Output
symmetrical to Fall Time
OUTx
1.0
µs
1.2
2)6)sent_slew_rate
1.6
2)6)
sent_slew_rate bit = 1100
2.7
2)6)
sent_slew_rate bit = 1110
1.5
2.7
trise_asym
tfall
ttick
tS_Init
Rise Time of Output
asymmetrical to Fall Time
(recommended for SENT)
Fall Time of Output
SENT Tick Time
SENT Start-up Time
OUTx
OUTx
OUTx
2)6)
sent_slew_rate bit = 1000
bit = 1010
2)6)sent_slew_rate
bit = 1001
2)6)sent_slew_rate
bit = 1011
5.2
2)6)sent_slew_rate
bit = 1101
10.3
2)6)sent_slew_rate
bit = 1111
1.0
2)6)sent_slew_rate
bit = 100x
1.2
2)6)sent_slew_rate
bit = 101x
1.6
2)6)sent_slew_rate
bit = 110x
2.7
2)6)sent_slew_rate
bit = 111x
1.41
1.50
1.59
µs
1.88
2.00
2.12
µs
2.35
2.50
2.65
µs
2.58
2.75
2.92
µs
2.82
3.00
3.18
µs
5.64
6.00
6.36
µs
11.29
12.00
12.72
µs
µs
µs
OUTx
Initial start-up time until output is ready. For definition
see Fig. 5–4.
ms
2)7)
fusa_en bit = 0
3.1
ms
2)7)
fusa_en bit = 1
1.5
tS_high
SENT drive high
OUTx
1
ms
For definition see Fig. 5–4
tlatency
SENT average Latency
OUTx
0.75
ms
1)
twcresp
SENT Step Response
Time (worst case)
OUTx
1
ms
fdecsel bit = 10, tS_frame =
0.5 ms, LP-Filter: OFF,
sent_repetition_rate = 2 kHz
ROUT,SENT
Output Resistance over
Recommended Operating Range in SENT Output Mode
OUTx
52
70
VOUTLmax VOUT VOUTHmin
1)
2)
6)
7)
Guaranteed by Design
Characterized on small sample size, not tested
Measured from/to 1.1 V to/from 3.8 V with CL = 4.7 nF, VSUP = 5 V
If dVSUP/dt < 1 V/ms and uv_level bit = 01 or 10 are selected, the start-up time can be delayed by additional 1.2 ms.
TDK-Micronas GmbH
June 20, 2022; DSH000215_001EN
43
HAR 3927
DATA SHEET
Symbol
Parameter
Pin
Name
Limit Values
Min.
Typ.
Unit
Conditions
Max.
SOIC8 Package
(Self-heating calculation see
Section 6.1. on page 49)
Rthja
Thermal Resistance
Junction to Air
Rthjc
Thermal Resistance
Junction to Case
RISOL
8)
Isolation Resistance
116
K/W
Determined with a 1s1p board
111
K/W
Determined with a 2s2p board
30
K/W
Determined with a 1s1p board
30
K/W
Determined with a 2s2p board
GND1,
GND2
4
M
8)
Between two dies (Between
GND1 and GND2 pin)
Galvanic isolation of GNDs not tested.
5.10. Notes for Electrical Characteristics
5.10.1. Power-On Operation
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TDK-Micronas GmbH
June 20, 2022; DSH000215_001EN
44
HAR 3927
DATA SHEET
5.10.2. Definition of Parameter INL and absolute D/A Converter Error
VOUT
VSUP
Ideal Line
VOUT,DAC_ERR
Measured
VOUT
DACINL
Best-Fit
Line
VOFFSET
0
4095
OUTLSB12
Fig. 5–5: Definition of INL and absolute D/A converter error
5.10.3. Definition of Rise and Delay Time of Output
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WU R
Fig. 5–6: Definition of rise and delay time of output
TDK-Micronas GmbH
June 20, 2022; DSH000215_001EN
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HAR 3927
DATA SHEET
5.11. Magnetic Characteristics
At TA = 40 °C to 150 °C, VSUPx = 4.5 V to 5.5 V, GNDx = 0 V, after programming and
locking of the sensor, at Recommended Operation Conditions if not otherwise specified
in the column “Conditions”.
Typical characteristics for TA = 25 °C and VSUPx = 5 V.
Symbol
Parameter
Pin
Name
Min.
Typ.
Max.
Unit
Conditions
RANGE
Detectable angle range
OUTx
0
360
°
7)
res
Angle resolution
OUTx
0.09
°
7)
Elinxy_RT
XY angle linearity error (on
output of CORDIC)
OUTx
0.3
0.3
°
1)2)3)5) INL
TA = 25 °C; VSUP = 5 V
BAMP = 20 mT
Elinxy_temp
XY angle linearity error
over temperature related
to 25 °C (on output of
CORDIC)
OUTx
Elinxy_RT_life
(360°/4096)
TA = 40 ... 150 °C
VSUP = 5 V
1.0
1.0
°
2)3)5)6) B
AMP
= 30 mT
1.5
1.5
°
1)2)3)5) B
AMP
= 20 mT
1.3
°
2)3)4)5)6)
XY angle linearity error
over life time (on output of
CORDIC)
OUTx
ASMmXY
Absolute Sensitivity Mismatch between X and Y
Hall-plates
OUTx
2
2
%
1)8)
TA = 25 °C
ASMmX/Y_Z
Absolute Sensitivity Mismatch between X/Y and Z
Hall-plates
OUTx
4
4
%
1)8)
TA = 25 °C
SenseXYZ
Sensitivity of X,Y and Z
Hall-plate
OUTx
123
128
133
LSB/
mT
1)
SMmXY
Thermal Sensitivity Mismatch Drift of calibrated
signals between X and Y
channel
OUTx
2
2
%
1)8) Related
to TA = 25 °C
SMmX/Y_Z
Thermal Sensitivity Mismatch Drift of calibrated
signals between X/Y and Z
channel
OUTx
2.5
2.5
%
1)8) Related
to TA = 25 °C
OffsetXY
Offset of X and Y Hallplates
OUTx
20
20
LSB15 1)8) TA = 25 °C
OffsetZ
Offset of Z Hall-plate
OUTx
12
12
LSB15 1)8) TA = 25 °C
TA = 25 °C; VSUP = 5 V;
BAMP = 20 mT
TA = 25 °C
1) Characterized
on small sample size, 3-sigma values, not tested for each device
Pure sine/cosine w/o distortion (ideal diametral magnet). Zero angle calibration in the system. The supply voltage
VSUP is regarded as constant over temperature.
3) After proper setpoint linearization done at 25 °C
4)
After 1008 h HTOL
5) Calculated/simulated angular error based on characterization and not on single error summation
6) Based on Simulation Model, 3-sigma values (not tested)
7) Guaranteed by Design
2)
8)
Can be compensated in customer application
TDK-Micronas GmbH
June 20, 2022; DSH000215_001EN
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HAR 3927
DATA SHEET
Symbol
Parameter
Pin
Name
Min.
Typ.
Max.
Unit
OffsetXY
Offset Drift of X and Y Hallplates
OUTx
45
45
LSB15 1)8) Related to TA = 25 °C
OffsetZ
Offset Drift of Z Hall-plate
OUTx
45
45
LSB15 1)8) Related to TA = 25 °C
EPhaseXY
Phase Error between X and
Y Hall-plates
OUTx
2
°
1)8)
EPhaseX/Y_Z
Phase Error between X/Y
and Z Hall-plates
OUTx
2
°
1)8)
SMmXYZ_life
Relative Sensitivity Mismatch Drift between X, Y
and Z Hall-plates over life
time
OUTx
3
%
1)4)
OffsetXY_life
Offset Drift of calibrated sig- OUTx
nals of X or Y channel over
life time
40
LSB15 1)4)
OffsetZ_life
Offset Drift of calibrated sig- OUTx
nals of Z channel over life
time
5
LSB15 1)4)
1)
4)
Characterized on small sample size, 3-sigma values, not tested for each device
After 1008 h HTOL
8)
Can be compensated in customer application
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Conditions
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DATA SHEET
5.12. Temperature Sensor
At TA = 40 °C to 150 °C, VSUPx = 4.5 V to 5.5 V, GNDx = 0 V, after programming and
locking of the sensor, at Recommended Operation Conditions if not otherwise specified
in the column “Conditions”.
Typical characteristics for TA = 25 °C and VSUPx = 5 V.
Symbol
Parameter
Pin
Name
Min.
Typ.
Max.
Unit
Conditions
TEMP_ADJGain
Gain of Temperature Sensor
OUTx
89.25
LSB15/°C
1)
TEMP_ADJOffset
Temperature Sensor Offset
OUTx
3720
LSB15
1) for
TEMP_SENTGain
Gain of Temperature Sensor
for SENT Output
OUTx
8.1
LSB12/°C
1) SENT
TEMP_SENTOffset
Temperature Sensor Offset
for SENT Output
OUTx
565.3
LSB12
1)
TLin
Temperature Sensor
Linearity Error
OUTx
2
2
°C
2) Junction Temperature
TAcc
Temperature Sensor
Accuracy
OUTx
5
5
°C
2) Junction Temperature
for TEMP_ADJ register
TEMP_ADJ reg-
ister
Slow Channel
SENT Slow Channel
1) Not
2)
tested
Characterized on small sample size, 3-sigma values, not tested for each device
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HAR 3927
DATA SHEET
6. Application Notes
6.1. Ambient Temperature
Due to the internal power dissipation, the temperature on the silicon chip (junction temperature TJ) is higher than the temperature outside the package (ambient temperature TA).
TJ = TA + T
The maximum ambient temperature is a function of power dissipation, maximum allowable die temperature and junction to ambient thermal resistance (Rthja). With a typical
supply voltage of 5.0 V the power dissipation P is 0.063 W per die. The junction to ambient thermal resistance Rthja is specified in Section 5.9. on page 40.
The difference between junction and ambient air temperature is expressed by the following equation (at static conditions and continuous operation):
T = P * RthjX
The X represents junction to air, case or solder point.
For worst case calculation, use the max. parameters for ISUP and RthjX, and the
max. value for VSUP from the application.
Note
The calculated self-heating of the device is only valid for the Rth test boards.
Depending on the application setup the final results in an application environment might deviate from these values.
6.2. EMC and ESD
Please contact TDK-Micronas for detailed information on EMC and ESD.
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June 20, 2022; DSH000215_001EN
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HAR 3927
DATA SHEET
6.3. Application Circuit for HAR 3927
Analog Output
HAR 3927
Sensor Assembly
ECU
VSUP
(typ. 5 V)
VSUP1
CP
GND1
TEST1
GND
RL
CL
CINPUT
OUT1
INPUT
OUT2
INPUT
TEST2
CL
RL
CINPUT
GND2
GND
CP
VSUP
(typ. 5 V)
VSUP2
Fig. 6–1: Recommended application circuit for HAR 3927 in analog output mode (pull-down)
HAR 3927
Sensor Assembly
ECU
VSUP
(typ. 5 V)
VSUP1
RL
CP
GND1
TEST1
GND
CINPUT
CL
OUT1
INPUT
OUT2
INPUT
TEST2
CL
RL
GND2
CINPUT
GND
CP
VSUP
(typ. 5 V)
VSUP2
Fig. 6–2: Recommended application circuit for HAR 3927 in analog output mode (pull-up)
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HAR 3927
DATA SHEET
Table 6–1: Recommended components in analog output mode
Name
Recommended Value
CP
100 nF (470 nF for CISPR Class 5)
CL + CINPUT
100 nF
RL Pull-down
10 k
RL Pull-up
10 k
SENT Output
In case of SAEJ2716 SENT output mode, it is recommended to add a filter structure at
the output pin for having a SENT standard compliant output slew rate.
HAR 3927
Sensor Assembly
ECU
VSUP
(typ. 5 V)
VSUP1
RPull-Up
CP
GND
GND1
TEST1
CINPUT
CL
CTau
RTau
INPUT
OUT1
INPUT
OUT2
RTau
TEST2
CL
CINPUT
GND2
CTau
GND
CP
RPull-Up
VSUP
(typ. 5 V)
VSUP2
Fig. 6–3: Recommended application circuit for HAR 3927 in SENT mode
Table 6–2: Recommended components in SENT mode
Name
SENT Specification
Recommended Value
CP
N/A
470 nF
CINPUT
< 0.1 nF
68 pF
CTau
1.54 nF 2.86 nF
2.2 nF
RPull-Up
10 k55k
10 k
RTau
448 672
560
CL
N/A
4.7 nF
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June 20, 2022; DSH000215_001EN
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HAR 3927
DATA SHEET
6.4. Recommended Pad Size SOIC8 Package
2.200
0.600
1.270
5.200
Fig. 6–4: Pad size recommendation for SOIC8 package (all dimensions in mm)
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HAR 3927
DATA SHEET
7. Programming of the Sensor
HAR 3927 features two different customer modes. In Application Mode, the sensors provide an analog output voltage or a digital output signal in accordance with the SENT standard. In Programming Mode (Listen Mode) it is possible to change the register settings
of the sensor.
After power-up, the sensor is always operating in Application Mode. It is switched to
Programming Mode by a BiPhase-M protocol via output voltage modulation. Therefore
the programming device needs to provide a sync pulse at the output pin.
7.1. Programming Interface
In Programming Mode, HAR 3927 is addressed by modulating a serial telegram on the
sensor’s output pin. The sensor answers with a modulation of the output voltage.
A logical “0” is coded as no level change within the bit time. A logical “1” is coded as a level
change at typically 50% of the bit time. After each bit, a level change occurs (see Fig. 7–1).
The serial telegram is used to transmit the EEPROM content, error codes, and digital values of the angle information from and to the sensor.
tbittime
tbittime
or
logical 0
tbittime
tbittime
or
logical 1
50%
50%
50%
50%
Fig. 7–1: Definition of logical 0 and 1 bit
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HAR 3927
DATA SHEET
Table 7–1: Telegram parameters (All voltages are referenced to GNDx.)
Symbol
Parameter
Pin
Name
Limit Values
Unit
Min.
Typ.
Max.
tH_bbit
Host BiPhase bit time
OUTx
0.01
1.1
ms
VH_OUTL
Host OUT Pin Voltage for
Low Level during
Programming
OUTx
0
0.5
V
VH_OUTH
Host OUT Pin Voltage for
High Level during
Programming
OUTx
4.5
5.0
V
SR
Host slew rate BiPhase
protocol
OUTx
10
V/µs
VSUPProgr
VSUP Voltage for memory
programming
VSUP
4.5
5.0
5.5
V
1) Not
Conditions
1)
For recommended
application circuit.
tested
7.2. Programming Environment and Tools
For the programming of HAR 3927 during product development, a programming tool
including hardware and software is available on request. It is recommended to use the
TDK-Micronas tool kit (TDK MSP V1.x and Lab View Programming Environment) in order
to facilitate the product development. The details of programming sequences are content
of the application notes “HAR 3927 User Manual” and “HAR 3927 Programming Guide”.
7.3. Programming Information
For reliability in service, it is mandatory to set the customer lock bit
(SETUP_SUPERVISION[15]) to 1 after final adjustment and final EEPROM programming.
Note
– After the customer lock is activated (by writing and power-on-reset),
it is not possible to program the sensor anymore.
– Because the lock bit is also included in the customer checksum,
the checksum has to be calculated considering the lock bit.
To lock the sensor, the customer checksum has to be calculated and stored as described
in application note “HAR 3927 User Manual”. Refer to this section and the following flowchart for more details.
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HAR 3927
DATA SHEET
Start
Set customer lock bit
(SETUP_SUPERVISION[15] = 1)
Calculate EEPROM CRC from
address 0x00 to 0x5E
Write result of calculation into
address 0x5F
Power-on-reset
Fig. 7–2: Locking the Sensor
The successful setting of the customer lock bit shall be checked, e.g. by reading back the
customer lock bit after programming and downloading it to the shadow RAM, but before a
power-on-reset. The lock mechanism becomes only active after the next power-on-reset.
Electro-static discharges (ESD) may disturb the supply voltage during programming.
Please take precautions against ESD.
A programming tool including hardware and software can be provided for product evaluation and application development. It is recommended to use the TDK-Micronas tool kit to
simplify the product development phase.
The HAR 3927 allows to read the registers after locking, provided that valid commands
with correct CRC are recognized by the sensor and the over-current detection is not disabled (see Table 3–9 in the application note “HAR 3927 User Manual”). The programming
command does not have any effect on the memory of locked devices.
Note
A description of the communication protocol and the programming of the
sensor is available in a separate document (application note “HAR 3927
Programming Guide”).
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June 20, 2022; DSH000215_001EN
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HAR 3927
DATA SHEET
8. Document History
1. Advance Information “HAR 3927 Robust Dual-Die Programmable 2D Position Sensor with Analog
and SENT Output Interface”, May 13, 2020, DSH000222_001EN. First release of the advance
information.
2. Data Sheet “HAR 3927 Robust Dual-Die Programmable 2D Position Sensor with Analog and
SENT Output Interface”, June 20, 2022, DSH000215_001EN. First release of the data sheet.
Describing ROM-ID release: 4301 (mass production release):
Major changes compared to previous Advance Information:
– Electrical and magnetic characteristics updated
– Parameter tUV and tOV removed as it is covered by overall FDTI
TDK-Micronas GmbH
Hans-Bunte-Strasse 19 D-79108 Freiburg P.O. Box 840 D-79008 Freiburg, Germany
Tel. +49-761-517-0 Fax +49-761-517-2174 www.micronas.tdk.com
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56
