ACS37002
400 kHz, High Accuracy Current Sensor
with Pin-Selectable Gains and Adjustable Overcurrent Fast Fault in SOICW-16 Package
Table of Contents
Features and Benefits............................................................ 1
Description........................................................................... 1
Power Supply Offset Error (VPS)........................................ 30
Offset Power Supply Rejection Ratio (PSRRO).................... 30
Packages............................................................................. 1
Power Supply Sensitivity Error (EPS)................................. 30
Selection Guide.................................................................... 2
Sensitivity Power Supply Rejection Ratio (PSRRS).............. 30
Absolute Maximum Ratings.................................................... 4
Fault Behavior.................................................................... 31
Isolation and Package Characteristics..................................... 5
Overcurrent Fault (OCF)................................................... 31
MA Package Specific Performance.......................................... 5
LA Package Specific Performance........................................... 5
Pinout Diagram and Terminal List............................................ 6
Overcurrent Fault Operating Range/Point (IOCF-OR, IOCF-OP)...31
Overcurrent Fault Hysteresis (IOCF-Hyst)........................... 31
Voltage Overcurrent Pin (VOC)...................................... 31
Functional Block Diagram...................................................... 7
Common Electrical Characteristics.......................................... 8
Performance Characteristics..................................................11
Functional Description......................................................... 25
Power-On Reset Operation............................................... 25
Power-On/Power-Off.................................................... 25
Overcurrent Fault Error (EOCF)....................................... 32
Overcurrent Fault Response Time (tOCF)......................... 32
Overcurrent Fault Reaction Time (tOCF-R)........................ 32
Overcurrent Fault Mask Time (tOCF-MASK)........................ 32
Overcurrent Fault Hold Time (tOCF-HOLD)......................... 32
Overcurrent Fault Persist............................................... 32
Overvoltage Detection (OVD)........................................ 26
OCF Disable................................................................ 32
Absolute Maximum Ratings............................................... 27
Response Characteristics Definitions and Performance Data.... 33
Supply Zener Clamp Voltages........................................ 27
Forward and Reverse Supply Voltage............................. 27
Forward and Reverse Output Voltage............................. 27
Forward and Reverse Reference/Fault Voltage................ 27
Response Time (tRESPONSE).............................................. 33
Propagation Time (tpd)...................................................... 33
Rise Time (tR).................................................................. 33
Output Slew Rate (SR)..................................................... 33
Output Source and Sink Current..................................... 27
Temperature Compensation.............................................. 34
Definitions of Operating and Performance Characteristics........ 28
Temperature Compensation Update Rate........................... 34
Zero Current Voltage Output (VIOUT(Q), QVO)...................... 28
QVO Temperature Drift (VQE)............................................ 28
Reference Voltage (VREF)................................................. 28
Reference Voltage Temperature Drift (VRE)........................ 28
Application and Theory........................................................ 35
Application Circuits.......................................................... 35
Theory and Functionality – VOC and OCF.......................... 36
VOC Driven by Non-Inverting Buffered VREF.................. 36
Offset Voltage (VOE)........................................................ 28
Power Supply Decoupling Capacitor and
Output Saturation Voltage (VSAT(HIGH/LOW)).......................... 28
Output Voltage Operating Range (VOOR)............................. 28
Sensitivity (Sens)............................................................. 29
Output Capacitive Loads............................................. 36
Dynamically Change Gain in a System............................... 37
Thermal Performance.......................................................... 38
Sensitivity Error (Esens)..................................................... 29
Gain Selection Pins.......................................................... 29
Thermal Rise vs. Primary Current...................................... 38
Evaluation Board Layout .................................................. 38
Full Scale (FS)................................................................. 29
Package Outline Drawings................................................... 39
Nonlinearity (ELIN)............................................................ 29
Total Output Error (ETOT)................................................... 30
MA Package.................................................................... 39
LA Package..................................................................... 40
3
Allegro MicroSystems
955 Perimeter Road
Manchester, NH 03103-3353 U.S.A.
www.allegromicro.com
ACS37002
400 kHz, High Accuracy Current Sensor
with Pin-Selectable Gains and Adjustable Overcurrent Fast Fault in SOICW-16 Package
ABSOLUTE MAXIMUM RATINGS
Characteristic
Symbol
Forward Supply Voltage
VFCC
Reverse Supply Voltage
VRCC
Forward Output Voltage
Reverse Output Voltage
Forward Input Voltage
Reverse Input Voltage
Operating Ambient Temperature
Storage Temperature
Maximum Junction Temperature
VFIOUT
VRIOUT
VFI
VRI
TA
Tstg
TJ(max)
Notes
Applies to VIOUT, VOCF, and VREF
Applies to VIOUT, VOCF, and VREF
Applies to GAIN_SEL0, GAIN_SEL1, and VOC
Applies to GAIN_SEL0, GAIN_SEL1, and VOC
Rating
Unit
6.5
V
–0.5
V
(VCC + 0.7) ≤ 6.5
V
–0.5
V
(VCC + 0.7) ≤ 6.5
V
–0.5
V
–40 to 150
°C
–65 to 165
°C
165
°C
THERMAL CHARACTERISTICS
Characteristic
Symbol
Package Thermal Resistance
(Junction to Ambient)
Package Thermal Metric
(Junction to Top)
Package Thermal Resistance
(Junction to Case)
Package Thermal Resistance
(Junction to Board)
RθJA
ΨJT
RθJC
RθJB
Package Thermal Resistance
(Junction to Ambient)
Package Thermal Characterization
(Junction to Top)
Package Thermal Resistance
(Junction to Case)
Package Thermal Resistance
(Junction to Board)
RθJA
ΨJT
RθJC
RθJB
Notes
MA Package, 16-Pin SOICW
Mounted on the standard MA/LA Current Sensor
Evaluation Board (ACSEVB-MA16-LA16)
Simulated per the methods in JESD51-1
Simulated per the methods in JESD51-8
LA Package, 16-Pin SOICW
Mounted on the standard MA/LA Current Sensor
Evaluation Board (ACSEVB-MA16-LA16)
Simulated per the methods in JESD51-1
Simulated per the methods in JESD51-8
Value
20
2.4
14
14
16
–1.7
10
8
Unit
°C/W
°C/W
°C/W
°C/W
°C/W
°C/W
°C/W
°C/W
4
Allegro MicroSystems
955 Perimeter Road
Manchester, NH 03103-3353 U.S.A.
www.allegromicro.com
