[AP1355AEM]
AP1355AEM
Amplifier for Hall Element
1. General Descriptions
AP1355AEM is an amplifier specially designed for Hall Element. The AP1355AEM integrates built-in
current source for driving a Hall Element and amplifier for Hall output. The current source and offset voltage
of Hall Element are controllable by external voltage supply, so as to calibrate characteristics of Hall Element
and to calibrate errors after installation of Hall element to the system.
2. Features
Input Voltage
±13.5V ～ ±15V ～ ±16.5V
Operating Temperature range
−40°C ～ 105°C
Built-in current source for Hall Element
5mA±5.4% @ Ta= 25°C (+0.045%/°C)
Amplifier Gain
Gain A ×180
Gain B ×95
Offset Voltage
Offset Calibration Range ±1.85V(typ)、
Offset Calibration Accuracy ±2.0mV
Built-in Voltage Reference
5.0V±2% @ Ta= 25°C
Output Drive Ability
±10mA
Package
16-pin TSSOP
ESD Level
HBM = ±2.0kV
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3. Table of Contents
1.
2.
3.
4.
5.
6.
7.
8.
9.
10.
11.
12.
General Descriptions ............................................................................................................................................ 1
Features................................................................................................................................................................. 1
Table of Contents.................................................................................................................................................. 2
Block Diagram and Functions .............................................................................................................................. 3
Ordering Information ............................................................................................................................................ 4
Pin Configurations and Functions ......................................................................................................................... 4
Absolute Maximum Ratings ................................................................................................................................. 5
Recommended Operationg Conditions ................................................................................................................. 5
Electrical Characteristics ...................................................................................................................................... 6
Functional Descriptions ........................................................................................................................................ 9
Package ............................................................................................................................................................... 11
Revision History ................................................................................................................................................. 12
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4. Block Diagram and Functions
■ Block Diagram
+15V
GND
VCC
16
1
1.0uF
CVCC
ISET
RISET
3.3k
2
Voltage
Reference
IHALL
3
Current
mirror
Circuit
VREF
15
VISET
14
IN+
4
2
10k
1
HG-362A
3
Offset
calibration
Circuit
VOS
13
1 AO1
4
Amplifier
TR1
12
CIN
2200pF
Gain set
Circuit
IN-
5
100
1000pF
AO2 8
VCC 7
2 CS
AK9820C
DI 6
3 SK
4 DO
GND 5
TR2
DI
DO
SK
CS
11
VO
N.C.
6
CVREF
0.1uF
10
10k 10k
N.C.
VEE
7
CVEE
1.0uF
9
N.C.
8
-15V
Figure 1. Block Diagram
■ Functions
Block
Amplifier
Offset Calibration
Circuit
Voltage Reference
Current Mirror Circuit
Functions
It amplifies the generated voltage of Hall Element. It can change the gain by making the
short circuit between TR1 pin and TR2 pin.
It adjusts the offset of the amplifier output. The offset is adjustable by inputting the
voltage to VOS pin.
It outputs the reference voltage (5V). Its voltage is supplied for the power supply of
DAC.
It supplies the current to the hall element. The current is adjustable by inputting the
voltage to VISET pin.
■ D/A Converter (AK9820CTH)
AK9820CTH inputs the voltage to the offset calibration circuit, and sets up the current for Hall Element.
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5. Ordering Information
AP1355AEM
−40°C ～ 105°C
16-pin TSSOP
6. Pin Configurations and Functions
■ Pin Configurations
VCC
1
16
GND
ISET
2
15
VREF
IHALL
3
14
VISET
IN+
4
13
VOS
IN-
5
12
TR1
VO
6
11
TR2
N.C.
7
10
N.C.
N.C.
8
9
VEE
■ Pin Functions
No. Pin Name I/O Descriptions
1
VCC
I Positive power supply
2
ISET
I Pin for setting driving current of Hall Element. Connect external resistor RISET.
Current source pin for driving Hall Element.
3
IHALL
O Driving current IHALL can be calculated by following formula;
IIHALL=VVISET÷RISET×3
4
IN+
I Input pin of Hall signal. Connect OUT+ of HG-362A.
5
INI Input pin of Hall signal. Connect OUT- of HG-362A.
6
VO
O Output pin
7
N.C.
- No connection
8
N.C.
- No connection
9
VEE
I Negative Power supply
10
N.C.
- No connection
11
TR2
I Pin for gain setting
12
TR1
I Pin for gain setting
13
VOS
I Pin for offset voltage control. Connect AO1 of AK9820CTH.
14
VISET
I Pin for control of driving current of Hall Element. Connect AO2 of AK9820CTH.
Voltage reference pin. Connect VCC of AK9820CTH.
15
VREF
O Temperature characteristics differ by changing load. Do not connect any external parts
except for parts with specified load.
16
GND
- GND
Note 1. It should be shorted by below 1ohm, when the pins between TR1 and TR2 are shorted.
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7. Absolute Maximum Ratings
Parameter
Symbol
min
max
Units
VCC
GND
+18
V
Supply Voltage
VEE
-18
GND
V
IN-, IN+,
VEE
VCC
V
TR1,TR2, VOS
Input Pin
VISET
GND
VCC
V
VO
VEE
VCC
V
Output Pin
ISET, IHALL,
GND
VCC
V
VREF
Storage Temperature Range
TSTG
-55
+150
°C
Junction Temperature Range
TJ
125
°C
Power Dissipation (Note 3)
PD
200
mW
Note 2. All Voltages with respect to GND pin.
Note 3. Thermal Resistance of PKG(θJA): 112.6°C/W (JEDEC51, four-layers PCB)
Condition
Ta=105°C
WARNING: The maximum ratings are the absolute limitation values with the possibility of the IC breakage.
When the operation exceeds this standard quality cannot be guaranteed.
8. Recommended Operating Conditions
Parameter
Positive Power Supply Voltage
Negative Power Supply Voltage
Operating Temperature Range
VO Capacitor
VREF Capacitor
VCC Capacitor
VEE Capacitor
Input Capacitor
Symbol
VCC
VEE
TOPR
CVO
CVREF
CVCC
CVEE
CIN
min
13.5
-16.5
-40
0.47
0.47
1650
typ
15
-15
25
0.1
1.0
1.0
2200
max
16.5
-13.5
105
470
0.47
2750
Units
V
V
°C
pF
µF
µF
µF
pF
WARNING: AKM assumes no responsibility for the usage beyond the conditions in this datasheet.
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9. Electrical Characteristics
Ta=-40°C ~105°C、VCC=13.5V~16.5V、VEE= -VCC, unless otherwise specified.
Parameter
Symbol
min
typ
max
Units Conditions
ICC
9.0
11.0
mA
RISET=3.00kΩ, VVISET=5.0V
Supply Current
VVOS=2.5V, HE:HG-362A
IEE
-2.0
-3.0
mA
ICC
11.0
mA
At Startup,
VCC,VEE=0~±16.5V, ISET=3.00kΩ
Supply Current
IEE
-3.0
mA
VVISET= VVREF=VVOS, HE:HG-362A
Reference Voltage Source
Reference Voltage
IVREF=0mA, VVISET=5.0V
VREF
4.9
5.0
5.1
V
(25°C)
VVOS=2.5V, RISET=3.00kΩ, Ta=25°C
At Startup,
VREF
-0.6
6.5
V
Reference Voltage
Temperature
=0mA, VVISET=5.0V
I
Characteristics of
-100
0
+100 ppm/°C VREF
∆VREF
VVOS=2.5V, RISET=3.00kΩ
Reference Voltage
IVREF=0 to 5.5mA, VVISET=5.0V
LoReg
Load Regulation
100
mV
VVOS=2.5V, RISET=3.00kΩ
VREF
ISET Pin
VISETO = VISET-VVISET, RISET=2.7kΩ～
At ISET Pin
-50
-10
5
mV
VISETO
Offset Voltage
7.5kΩ, VVISET=0.9V～5.2V, VVOS=2.5V
ISET Pin Voltage,
LoReg
RISET=2.7kΩ～7.5kΩ, VVISET=0.9V～
50
mV
Load Regulation
5.2V, VVOS=2.5V
ISET
Hall Element Driving Current
HALL Current
IIHALL= VVISET /RISET ×3, RISET= 3.00kΩ,
IHALL
4.73
5.0
5.27
mA
(25°C)
VVISET= VVREF, VVOS=2.5V, Ta=25°C
IIHALL= VVISET /RISET ×3
HALL Current
RISET=3.00kΩ, RISET Temperature
IHALL105
4.76
5.18
5.59
mA
(105°C)
Characteristic =0ppm/°C,
VVISET=VVREF, VVOS=2.5V
IIHALL= VVISET /RISET ×3
HALL Current
RISET=3.00kΩ, RISET Temperature
4.46
4.85
5.24
mA
IHALL-40
(-40°C)
Characteristic =0ppm/°C,
VVISET=VVREF, VVOS=2.5V
VVISET=0.9V～5.2V, VVOS=2.5V
Temperature Drift
200
450
700
∆IHALL
ppm/°C
of HALL Current
RISET=2.7kΩ～7.5kΩ,
Ratio of ISET Pin
VVISET=0.9V～5.2V, VVOS=2.5V,
Current to Hall
IHALL /
2.90
3.0
3.10
RISET=2.7kΩ～7.5kΩ,
Current
IISET
Ta=25°C
(25°C)
Maximum HALL
RISET=1.0kΩ, RIHALL=1.92kΩ
IHALL MAX
5.8
mA
Current
VVOS=2.5V, VVISET=5.2V
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Ta=-40°C ~105°C、VCC=13.5V~16.5V、VEE= -VCC, unless otherwise specified.
Parameter
Symbol
min
typ
max
Units Conditions
Amplifier（Offset Calibration）
VVOS=1/2VREF, TR1-TR2=0Ω
Output Voltage A
VOS_A
-0.20
0
0.20
V
VIN+=VIN-= 0~4V, IVO =0mA
VVISET=5.0V
VVOS=0V, TR1-TR2=0Ω
Output Voltage B
VOS_B
1.65
1.85
2.05
V
VIN+=VIN-= 0~4V, IVO =0mA
VVISET=5.0V
VVOS=VREF, TR1-TR2=0Ω
Output Voltage C
VOS_C
-2.05
-1.85
-1.65
V
VIN+=VIN-= 0~4V, IVO =0mA
VVISET=5.0V
Amplifier（DC）
Input Bias
IIB
-15
-70
nA
VIN+=VIN-= 0~7.5V
Current
Input Offset
IIO
±1.5
±30
nA
VIN+=VIN-= 0~7.5V
Current
VCC
VCC
CMR > 80dB, (Ta=25°C～105°C)
V
Common Mode
-3.0
-2.0
CMR > 75dB, (Ta=-40°C～below
Input Voltage
VICR
VEE
VEE
25°C)
Range
V
+2.0
+3.0
Gain=180, IVO =0mA
VCC
V
-3.0
Maximum Output
VOM
RL =2kΩ
Voltage Range
VEE
V
+3.0
IO SINK
10
mA
VIN+=2V, VIN-=3V, VVO=0V
Output Current
IO SOURCE
-10
mA
VIN+=3V, VIN-=2V, VVO=0V
Amplifier（DC2）
TYP
TYP
TR1-TR2=0Ω, VVO=±4.0V
Amplifier Gain A
Gain A
180
times
-5%
+5%
IVO =0mA
TYP
TYP
TR1-TR2=0Ω, VCC,VEE=±15V
Amplifier Gain A
Gain A
180
times
-5%
+5%
VVO=±12.0V, IVO =0mA
TYP
TYP
TR1-TR2=Open, VVO=±4.0V
Amplifier Gain B
Gain B
95
times
-5%
+5%
IVO =0mA
TYP
TYP
TR1-TR2=Open, VCC,VEE=±15V
Amplifier Gain B
Gain B
95
times
-5%
+5%
VVO=±12.0V, IVO =0mA
Linearity of
±0.5
%
VVO=±4.0V
Amplifier Gain A
■ The equation of the Linearity of Gain A
Vo
VVO= ±4.0V, ±4.0V / 180= ±0.022V
V1
A: V1-V2 amount of change
B: V2-V3 amount of change
A
0.022V
Equation：(A-B)/{(A+B)/2}×100
V2
B
V3
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Ta=-40°C ~105°C、VCC=13.5V~16.5V、VEE= -VCC, unless otherwise specified.
Symbol
min
typ
max
Units Conditions
Parameter
Amplifier（AC）
Slew Rate
Output Delay Time
Input Referred
Voltage Noise
Common Mode
Rejection Ratio
Protection
VREF limit Current
Thermal Protection
SR
tdely
5
-
8
1.0
3.0
V/µs
µs
VNI
-
4
8
µVrms
CMR
80
75
100
-
-
dB
dB
-
6
135
12
155
20
180
mA
°C
CL =100pF, RL≧2kΩ, Gain=180, 95
Gain=180, CL =100pF , RL≧2kΩ
HPF=400Hz, LPF=30kHz
VIN+=VIN-= 0V
Ta=25°C～105°C
Ta=-40°C～below 25°C
■Output Delay Time
Output Delay Time is specified the time of up to 50% of VOUT from IN+/IN- start-up.
Output
Delay Time
ININ+
(50%)
VOUT
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10. Functional Descriptions
AP1355AEM is, as the amplifier for the Hall Element, “Drive Current Circuit” which supplies the current to the Hall
Element, “Amplification Circuit” which amplifies the output voltage of the Hall Element, and “Offset Calibration
Circuit” which adjusts the offset of the Amplification Circuit output. Furthermore, it supplies the voltage of 5V to
the external DAC which controls “Drive Current Circuit” and “Offset Calibration Circuit” as the power supply.
10.1 Drive Current Circuit
The current (IIHALL) which is supplied from IHALL pin to the Hall Element is calculated by the resistor (RISET) of
ISET pin and the voltage (VVISET) of VISET pin.
IIHALL=VVISET / RISET ×3
（Ta=25°C）
And, as for the set up current (IIHALL), it is set up to have the temperature characteristic of about 450ppm/°C(typ.) to
correct the temperature characteristic of the Hall Element. But, the temperature characteristic of the external resistor
(RISET) is 0ppm/°C at that time.
And, the setup range for the resistor (RISET) is 2.7kΩ to 7.5kΩ, and the voltage (VVISET) is 1.0V to 5.0V.
10.2 Amplifier Circuit
Amplification Circuit is the measurement amplifier structure using three Operational Amplifiers.
The Amplifier Gain is selectable 95 times and 180 times by shorting the pins between TR1 pin and TR2 pin.
∆Vout＝∆Vin (100kΩ/10kΩ)(1+2×42.5kΩ/(5kΩ or 10kΩ))
And, the DC offset of the output voltage is adjustable by “Offset Calibration Circuit”.
Figure 2. Amplification Circuit
When the voltage which is at the output of the offset calibration circuit is 0V, the output voltage is VO= (100k/10k)
× (VB-VA). When it is based on the virtual short, the input pins both amplifiers (V1, V2) can be considered the same
voltage.
It supplies the same current through each resistor in the line from VA to VB (to 42.5k to 10k to 42.5k to VB),
because the current does not flow into the input pin.
For that, the equation becomes;
(VA-V1) / 42.5k = (V1-V2) / 10k = (V2-VB) / 42.5k
VA-VB = 42.5k / 10k×(V1-V2), V2-VB = 42.5k / 10k×(V1-V2)
By the above two equations;
VA-VB-(V1-V2) = (42.5k+42.5k)/10k×(V1-V2)
VA-V1 = (1+(42.5k+42.5k)/10k)×(V1-V2)
And, VO becomes;
VO = 100k/10k×(1+(42.5k+42.5k)/10k)×(V1-V2)
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10.3 Offset Calibration Circuit
The DC offset of the amplifier output is adjustable by inputting the voltage to VOS pin.
The offset voltage is adjustable in the typical range from +1.85V to -1.85V by inputting the voltage (from 0V to 5V)
to VOS pin.
・The equation for the component values
Specification Values
① VOS pin：0V
VO pin：1.85V
② VOS pin：2.5V
VO pin：0V
③ VOS pin：5V
VO pin：-1.85V
When it set up VOS pin as the horizontal axis (from ① to ③), VO pin as the vertical axis, It is y=1.85-2.5x, (ex.
y=0V, x=0.74)
Figure 3. Offset Calibration Circuit
VB=V2/(37k+10k)×10k
The current value through the register of 25kΩ is the below, because it becomes VA=VB by the virtual short.
I=(V1-VA)/25k=(V1-VB)/18.5k=(V1-(V2×10k)/(10k+37k))/18.5k
VC=VA-I×18.5k=VB- I×25k
VC=-18.5k/25k×V1+(10k/(10k+37k)×V2×(1+18.5k/25k)
VC=-0.74×V1+0.370×V2
The voltage of the precision which is divided by VREF/1023 is inputted to VOS.
10.4 Reference Voltage Circuit
5.0V which is the reference voltage is outputted from VREF pin. It is available for an external DAC.
10.5 Protection Circuit
VREF Current Limit ：The VREF Current is limited below 12mA (typ.).
VO Current Limit ：The VO Current is limited below ±30mA(typ.).
Thermal Protection：When the internal temperature in IC exceeds 155°C (typ.), the current for each circuit in IC is
turned off and all circuit is in shutdown.
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11. Package
0.13～ 0.18
5±0.1
9
1
8
6.4±0.2
4.4±0.1
16
0.6±0.1
■ Outline Dimensions
・16-pin TSSOP (Unit : mm)
0.13
M
0゜～ 10゜
1.1MAX
0.19～ 0.27
0.9±0.05
0.65
0.1
S
0.1±0.05
S
■ Marking
AP1355A
(3) XXXXX
(2)
(1)
1pin Indication
(2)
Market No.
(3)
Date Code (5digits)
Year Code(the rightmost digit) (ex.“2015”→“5”)、
(1)
Week Code throughout the year(two digit)、
Manegement Code(two digit)
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12. Revision History
Date (YY/MM/DD)
15/07/28
Revision
00
Page
-
Contents
First Edition
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[AP1355AEM]
IMPORTANT NOTICE
0. Asahi Kasei Microdevices Corporation (“AKM”) reserves the right to make changes to the information
contained in th
1. is document without notice. When you consider any use or application of AKM product stipulated in this
document (“Product”), please make inquiries the sales office of AKM or authorized distributors as to current
status of the Products.
1. All information included in this document are provided only to illustrate the operation and application examples
of AKM Products. AKM neither makes warranties or representations with respect to the accuracy or
completeness of the information contained in this document nor grants any license to any intellectual property
rights or any other rights of AKM or any third party with respect to the information in this document. You are
fully responsible for use of such information contained in this document in your product design or applications.
AKM ASSUMES NO LIABILITY FOR ANY LOSSES INCURRED BY YOU OR THIRD PARTIES
ARISING FROM THE USE OF SUCH INFORMATION IN YOUR PRODUCT DESIGN OR
APPLICATIONS.
2. The Product is neither intended nor warranted for use in equipment or systems that require extraordinarily high
levels of quality and/or reliability and/or a malfunction or failure of which may cause loss of human life, bodily
injury, serious property damage or serious public impact, including but not limited to, equipment used in nuclear
facilities, equipment used in the aerospace industry, medical equipment, equipment used for automobiles, trains,
ships and other transportation, traffic signaling equipment, equipment used to control combustions or
explosions, safety devices, elevators and escalators, devices related to electric power, and equipment used in
finance-related fields. Do not use Product for the above use unless specifically agreed by AKM in writing.
3. Though AKM works continually to improve the Product’s quality and reliability, you are responsible for
complying with safety standards and for providing adequate designs and safeguards for your hardware, software
and systems which minimize risk and avoid situations in which a malfunction or failure of the Product could
cause loss of human life, bodily injury or damage to property, including data loss or corruption.
4. Do not use or otherwise make available the Product or related technology or any information contained in this
document for any military purposes, including without limitation, for the design, development, use, stockpiling
or manufacturing of nuclear, chemical, or biological weapons or missile technology products (mass destruction
weapons). When exporting the Products or related technology or any information contained in this document,
you should comply with the applicable export control laws and regulations and follow the procedures required
by such laws and regulations. The Products and related technology may not be used for or incorporated into any
products or systems whose manufacture, use, or sale is prohibited under any applicable domestic or foreign laws
or regulations.
5. Please contact AKM sales representative for details as to environmental matters such as the RoHS compatibility
of the Product. Please use the Product in compliance with all applicable laws and regulations that regulate the
inclusion or use of controlled substances, including without limitation, the EU RoHS Directive. AKM assumes
no liability for damages or losses occurring as a result of noncompliance with applicable laws and regulations.
6. Resale of the Product with provisions different from the statement and/or technical features set forth in this
document shall immediately void any warranty granted by AKM for the Product and shall not create or extend in
any manner whatsoever, any liability of AKM.
7. This document may not be reproduced or duplicated, in any form, in whole or in part, without prior written
consent of AKM.
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