INA301 Datasheet, PDF (1/7 Pages) Texas Instruments – INA301 36-V, Low- or High-Side, High-Speed, Zero-Drift, Voltage-Output, Current-Shunt Monitor with High-Speed, Overcurrent Comparator

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INA301
SBOS713 – SEPTEMBER 2015
INA301
36-V, Low- or High-Side, High-Speed, Zero-Drift, Voltage-Output, Current-Shunt Monitor
with High-Speed, Overcurrent Comparator
1 Features
•1 Wide Common-Mode Input Range: 0 V to 36 V
• Dual Output: Amplifier and Comparator Output
• High Accuracy Amplifier:
– Offset Voltage: 100 µV
– Offset Voltage Drift: 0.5 µV/°C
– Gain Error: 0.15%
– Gain Error Drift: 10 ppm/°C
• Available Amplifier Gains:
– INA301A1: 20 V/V
– INA301A2: 50 V/V
– INA301A3: 100 V/V
• Programmable Threshold Set Through a Single
Resistor
• Total Alert Response Time: 1 µs
• Open-Drain Output With Latching Mode
• Package: MSOP-8
2 Applications
• Overcurrent Protection
• Power-Supply Protection
• Circuit Breakers
• Computers and Servers
• Telecom Equipment
• Battery Management
3 Description
The INA301 includes both a high common-mode
current-sensing amplifier as well as a high-speed
precision comparator configured to detect overcurrent
conditions through measuring the voltage developed
across a current-sensing or shunt resistor. This
current shunt monitor can measure this differential
voltage signal on common-mode voltages that can
vary from 0 V up to 36 V, independent of the supply
voltage. The device features an adjustable threshold
range that is set using a single external limit-setting
resistor.
An open-drain alert output on the device 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
issued in under 1 µs to allow 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 (–40°C to +125°C), and is
available in an MSOP-8 package.
PART NUMBER
INA301
Device Information
PACKAGE
BODY SIZE
MSOP (8)
3.0 mm × 3.0 mm
Typical Application
+2.7 V to 5.5 V
C_BYPASS
0.1 2F
Supply
(0 V to 36 V)
IN+
+
V_S
INA301
OUT
IN-
Load
ALERT
RESET
GND
LIMIT
R_PULL-UP
10 k
Microcontroller
ADC
GPIO
GPIO
R_LIMIT
DAC
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. PRODUCT PREVIEW Information. Product in design phase of
development. Subject to change or discontinuance without notice.