1 Features

• AEC-Q100 qualified for automotive applications:

– Temperature grade 1: −40°C to +125°C, TA

• Functional Safety-Capable

– Documentation available to aid functional safety

system design

• 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

• Onboard open-drain comparator

• Internal comparator voltage reference: 0.6 V

• Propagation delay time: 1 μs

• Latching capability on comparator

• Available gains:

– INA310A1-Q1, INA310B1-Q1 : 20 V/V

– INA310A2-Q1, INA310B2-Q1 : 50 V/V

– INA310A3-Q1, INA310B3-Q1 : 100 V/V

– INA310A4-Q1, INA310B4-Q1 : 200 V/V

– INA310A5-Q1, INA310B5-Q1 : 500 V/V

• Package options: VSSOP-8

2 Applications

• eTurbo/charger

• Electric power steering (EPS)

• Starter/generator

• Regenerative breaking

• Brake system

3 Description

The INA310x-Q1 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-Q1 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-Q1 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-Q1 operates from a single 2.7 V to

20 V supply and draws 1.6 mA of supply current.

The INA310x-Q1 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

current-sensing applications.