1 Features

• Wide common-mode voltage:

– Operational voltage: −4 V to +110 V

– Survival voltage: −20 V to +120 V

• High signal bandwidth: 1.3 MHz

• Slew rate: 2.5 V/μs

• Excellent CMRR: 160 dB

• Accuracy

– Gain error (maximum)

• Version A: 0.15, 10 ppm/°C drift

• Version B: 0.5, 20 ppm/°C drift

– Offset voltage (maximum)

• Version A: ±20 μV, ±0.25 μV/°C drift

• Version B: ±150 μV, ±1 μV/°C drift

• On-board open-drain comparator

• Internal comparator voltage reference: 0.6 V

• Propagation delay time: 1 μs

• Latching capability on comparator

• Available gains:

– INA310A1, INA310B1 : 20 V/V

– INA310A2, INA310B2 : 50 V/V

– INA310A3, INA310B3 : 100 V/V

– INA310A4, INA310B4 : 200 V/V

– INA310A5, INA310B5 : 500 V/V

• Package options: VSSOP-8

2 Applications

• 48 V DC/DC converter

• 48 V battery management systems (BMS)

• Test and measurement

• Macro remote radio unit (RRU)

• 48 V rack server

• 48 V merchant network & server power supply

(PSU)

• Solenoids and actuators

3 Description

The INA310x is an ultra-precise current sense

amplifier that can measure voltage drops across

shunt resistors over a wide common-mode range

from –4 V to 110 V, independent of supply voltage

with an integrated comparator. The high precision

current measurement accuracy is achieved through a

combination of low offset voltage (20 μV, maximum),

small gain error (0.15, maximum) and a high DC

CMRR (160 dB, typical). The INA310x has a high

signal bandwidth of 1.3 MHz designed for high

voltage DC current measurements and high-speed

applications like fast overcurrent protection.

The INA310x incorporates an open-drain comparator

and internal reference that provides a 0.6 V threshold.

An external resistive divider sets the current trip point.

The comparator includes a latching capability that can

be made transparent by grounding (or leaving open)

the RESET pin.

The INA310x operates from a single 2.7 V to 20 V

supply and draws 1.6 mA of supply current. The

INA310x is available in five gain options: 20 V/V,

50 V/V, 100 V/V, 200 V/V, and 500 V/V. These gain

options address a wide dynamic range of currentsensing

applications.

The INA310x is specified over an operating

temperature range of −40°C to +125°C and is offered

in a space-saving 8-pin VSSOP package.