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ACS70310 Datasheet Preview

ACS70310 Datasheet

Programmable Linear Hall-Effect Sensor IC

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ACS70310
Very High Precision, Programmable Linear Hall-Effect Sensor IC
with Reverse Battery Protection and High-Bandwidth (240 kHz)
Analog Output for Core-Based Current Sensing
FEATURES AND BENEFITS
• Factory-programmed segmented linear temperature
compensation (TC) provides ultralow thermal drift
□Sensitivity ±1%
□Offset ±5 mV
• On-board supply regulator with reverse-battery protection
provides high immunity to Electrical Overstress (EOS)
• Very fast response time (2 µs)
• High operating bandwidth: DC to 240 kHz
• AEC-Q100 Grade 0, automotive qualified
• Customer-programmable, high-resolution offset, and
sensitivity trim
• Extremely low noise and high resolution achieved via
proprietary Hall element and low-noise amplifier circuits
Continued on next page...
PACKAGE: 4-pin SIP (suffix KT)
TN Leadform TF Leadform
TG Leadform
Not to scale
DESCRIPTION
The Allegro ACS70310 IC incorporates a Hall element with
BiCMOS integrated circuitry to provide a fully monolithic
linear current sensor IC. The IC is sensitive to magnetic flux
density orthogonal to the IC package surface and the output
is an analog voltage proportional to the applied flux density.
The ACS70310 is designed to be used in conjunction with a
ferromagnetic core to provide highly accurate current sensing.
The gain and offset drift over temperature is factory programmed
atAllegro and delivers a solution with 1% sensitivity and 5 mV
offset error from 25°C to 150°C.
TheACS70310 is customer programmable. The absolute value
of gain and offset can be programmed after manufacturing to
provide customers industry-leading current sensor accuracy.
The sensor has a high operating bandwidth from DC to
240 kHz and a fast 2 µs response time. It is ideal for use in
high frequency automotive inverters and DC/DC converters
where fast switching is required.
Broken ground wire detection, clamps, power-on reset, and
overvoltage detection provide the required diagnostics for
safety-critical automotive applications.
The on-board supply regulator enables the supply pin to survive
voltages of ±18 V and the output pin to survive voltages of
+16 to –6 V for added robustness in the harsh automotive
environment.
Continued on next page...
VCC
(Programming)
CBYPASS
ACS70310-DS, Rev. 3
MCO-0000617
Regulator
Programming
Control
To all
subcircuits
Temperature
Sensor
Sensitivity Control
Charge Pump
Pulse Generator
Undervoltage
Detection
Broken
Ground
Detection
EEPROM and
Control Logic
Active Temp.
Compensation
Offset Control
Output
Clamps
Signal Recovery
Push/Pull
Output Driver
GND
Figure 1: Functional Block Diagram
VOUT
(Programming)
CL
July 17, 2019




Allegro

ACS70310 Datasheet Preview

ACS70310 Datasheet

Programmable Linear Hall-Effect Sensor IC

No Preview Available !

ACS70310
Very High Precision, Programmable Linear Hall-Effect Sensor IC
with Reverse Battery Protection and High-Bandwidth (240 kHz)
Analog Output for Core-Based Current Sensing
FEATURES AND BENEFITS (continued)
• Patented circuits suppress IC output spiking during fast current
step inputs
• Wide selectable sensitivity range between 0.5 and 11.5 mV/G
• User-selectable ratiometric behavior of sensitivity, quiescent
voltage, and clamps (ratiometry can be disabled), for simple
interface with application A-to-D converter (ADC)
• Precise recoverability after temperature cycling
• Open circuit detection on ground pin (broken wire)
• Customer programmable Output Voltage Clamps provide short-
circuit diagnostic capabilities
• Wide ambient temperature range: –40°C to 150°C
• Immune to mechanical stress
• Extremely thin package: 1 mm case thickness
DESCRIPTION (continued)
Device parameters are specified across an extended ambient
automotive temperature range: –40°C to 150°C. The ACS70310
sensor IC is provided in an extremely thin case (1 mm thick), 4-pin
SIP (single in-line package, suffix KT) that is lead (Pb) free, with
100% matte-tin leadframe plating.
SELECTION GUIDE
Part Number [1]
ACS70310LKTATN-001B5-C
ACS70310LKTATN-2P5B5-C
ACS70310LKTATN-005B5-C
ACS70310LKTATN-010B5-C
Factory-Programmed
Sensitivity (mV/G)
1
2.5
5
10
Programmable Sens
Range (mV/G)
0.5 to 1.2
1.2 to 2.5
2.5 to 5.5
5.5 to 11.5
TA (°C)
–40 to 150
[1] Characteristics are guaranteed within the sense programmable range of the corresponding part number.
[2] TN, TG and TF package leadform options available.
[3] Contact Allegro for additional packing options.
Package [2]
Packing [3]
4-pin SIP,
TN leadform
4000 pieces per 13-inch reel
ACS70310LKATN-001B5-C
Programmability
F = Factory only
C = Customer programmable
Forward Supply Voltage Level
5=5V
Directionality
B = Bidirectional
U = Unidirectional
Factory-Trimmed Sensitivity
001 = 1 mv/G
Package Leadform Option
TN
TF
TG
Package Designator
KTA = 4-pin mini SIP
Temperature Range
L = –40°C to 150°C
Allegro Part Number
Allegro MicroSystems
955 Perimeter Road
Manchester, NH 03103-3353 U.S.A.
www.allegromicro.com
2


Part Number ACS70310
Description Programmable Linear Hall-Effect Sensor IC
Maker Allegro
Total Page 27 Pages
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