Texas Instruments INA310A Handleiding

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INA310x –4 V to 110 V, 1.3 MHz, Ultra-Precise Current Sense Amplifier With Open-

Drain Comparator and Reference

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 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.

Package Information

(1)

PART NUMBERPACKAGEBODY SIZE (NOM)

INA310A

VSSOP (8)3.00 mm × 3.00 mm

INA310B

(1)For all available packages, see the package option

addendum at the end of the data sheet.

INA310

V

S

OUT

GND

IN+

IN-

-

+

-

+

CMP

OUT

RESET

2.7V to 20V

Supply

0.6-V

Reference

Controller

GPIO

GPIO

ADC

ADC

Battery

CMP

IN

Typical Application

INA310A, INA310B

SBOSA86 – MARCH 2023

An IMPORTANT NOTICE at the end of this data sheet addresses availability, warranty, changes, use in safety-critical applications,

intellectual property matters and other important disclaimers. PRODUCTION DATA.

Product specificaties