1 Features
1• 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: 20 V/V
– INA301A2: 50 V/V
– INA301A3: 100 V/V
• Programmable Alert Threshold Set Through a
Single Resistor
• Total Alert Response Time: 1 μs
• Open-Drain Output With Latching Mode
• Package: VSSOP-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 and a high-speed
comparator configured to detect overcurrent
conditions through measuring the voltage developed
across a current-sensing or current-shunt resistor and
comparing that voltage to a defined threshold limit.
The device features an adjustable limit threshold
range that is set using a single external limit-setting
resistor. This current-shunt monitor can measure
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 (–40°C to +125°C), and is
available in an 8-pin VSSOP package.