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.