INA301-Q1 Datasheet, PDF (1/32 Pages) Texas Instruments – Current-Shunt Monitor With High-Speed, Overcurrent Protection Comparator

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INA301-Q1
SBOS786A – APRIL 2016 – REVISED JUNE 2016
INA301-Q1 36-V, Automotive, High-Speed, Zero-Drift, Voltage-Output
Current-Shunt Monitor With High-Speed, Overcurrent Protection Comparator
1 Features
•1 Qualified for Automotive Applications
• AEC-Q100 Qualified With the Following Results:
– Device Temperature Grade 1: –40°C to
+125°C Ambient Operating Temperature
– Device HBM ESD Classification Level 2
– Device CDM ESD Classification Level C6
• Wide Common-Mode Input Range: 0 V to 36 V
• Dual Output: Amplifier and Comparator Output
• High Accuracy Amplifier:
– Offset Voltage: 35 µV (Max)
– Offset Voltage Drift: 0.5 µV/°C (Max)
– Gain Error: 0.1% (Max)
– Gain Error Drift: 10 ppm/°C
• Available Amplifier Gains:
– INA301A1-Q1: 20 V/V
– INA301A2-Q1: 50 V/V
– INA301A3-Q1: 100 V/V
• Programmable Alert Threshold Set Through a
Single Resistor
• Total Alert Response Time: 1 µs
• Open-Drain Output With Both Transparent and
Latching Modes
• Package: VSSOP-8
2 Applications
• Solenoid Control
• Low-Side Motor Monitoring
• Electronic Power Steering
• Power Seats
• Power Windows
• Body Control Modules
• Electronic Control Units
• Overcurrent Protection
• eFuses
3 Description
The INA301-Q1 includes both a high common-mode,
current-sensing amplifier and a high-speed
comparator configured to provide overcurrent
protection by measuring the voltage developed
across a current-sensing or current-shunt resistor and
comparing that voltage to a defined threshold limit.
This device features an adjustable limit-threshold
range that is set using a single external limit-setting
resistor. This current-shunt monitor measures
differential voltage signals on common-mode voltages
that can vary from 0 V up to 36 V, independent of the
supply voltage.
The open-drain alert output can be configured to
operate in either a transparent mode, where the
output status follows the input state, or in a latched
mode, where the alert output is cleared when the
latch is reset. The device alert response time is under
1 µs, allowing for quick detection of overcurrent
events.
This device operates from a single 2.7-V to 5.5-V
supply, drawing a maximum supply current of 700 µA.
The device is specified over the extended operating
temperature range of –40°C to +125°C, and is
available in an 8-pin VSSOP package.
Device Information⁽¹⁾
PART NUMBER
PACKAGE
BODY SIZE (NOM)
INA301-Q1
VSSOP (8)
3.00 mm × 3.00 mm
(1) For all available packages, see the package option addendum
at the end of the data sheet.
Typical Application
2.7 V to 5.5 V
CBYPASS
0.1 F
Supply
(0 V to 36 V)
IN+ ₊
IN±
Load
VS
GND
INA301-Q1
OUT
ALERT
RESET
LIMIT
RPULL-UP
10 k
Microcontroller
RLIMIT
ADC
GPIO
GPIO
DAC
Copyright © 2016, Texas Instruments Incorporated
1
An IMPORTANT NOTICE at the end of this data sheet addresses availability, warranty, changes, use in safety-critical applications,
intellectual property matters and other important disclaimers. PRODUCTION DATA.