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INA310B
  • INA310B
  • INA310B

INA310B

ACTIVE

-4-V to 110-V 1.3-MHz high-precision current-sense amplifier with comparator

Texas Instruments INA310B Product Info

1 April 2026 3

Parameters

Product type

Analog output with integrated comparator

Common-mode voltage (max) (V)

110

Common-mode voltage (min) (V)

-4

Input offset (±) (max) (µV)

150, 200, 250, 300, 500

Input offset drift (±) (typ) (µV/°C)

0.1

Features

Alert Function, High precision, Low-side Capable

Rating

Catalog

Voltage gain (V/V)

20, 50, 100, 200, 500

CMRR (min) (dB)

120

Bandwidth (kHz)

900, 1000, 1300

Supply voltage (max) (V)

20

Supply voltage (min) (V)

2.7

Iq (max) (mA)

2.25

Number of channels

1

Comparators (#)

1

Gain error (%)

0.5

Gain error drift (±) (max) (ppm/°C)

20

Slew rate (V/µs)

2.5

Operating temperature range (°C)

-40 to 125

Package

VSSOP (DGK)-8-14.7 mm² 3 x 4.9

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
  • 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

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 current-sensing 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.

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