1 Features

• SC70 and SOT-563 packages

– SC70 offers compatibility to existing solutions

– SOT-563 is 39 smaller footprint than SC70

– SOT-563 dimensions is 1.6 mm × 1.6 mm ×

0.55 mm

• Common-mode range (VCM): –0.2 V to +26 V

• High bandwidth: 350 kHz (A1 devices)

• Offset voltage:

– ±55 μV (maximum) at VCM = 0 V

– ±100 μV (maximum) at VCM = 12 V (A4 device)

• Output slew rate: 2 V/μs

• Bidirectional current-sensing capability

• Accuracy:

– Maximum gain error (A1, A2, A3): ±0.2

– Maximum offset drift: 0.5 μV/°C

• Gain options:

– 20 V/V (A1 devices)

– 50 V/V (A2 devices)

– 100 V/V (A3 devices)

– 200 V/V (A4 devices)

• Quiescent current: 260 μA (maximum)

2 Applications

• Motor control

• Battery monitors and balancers

• Power management

• Lighting control

• Solar inverters

3 Description

The INA185 current sense amplifier is designed for

use in cost-sensitive space constrained applications.

This device is a bidirectional, current-sense amplifier

(also called a current-shunt monitor) that senses

the voltage drop across a current-sense resistor

at common-mode voltages from –0.2 V to +26 V,

independent of the supply voltage. The INA185

integrates a matched resistor gain network in four,

fixed-gain device options: 20 V/V, 50 V/V, 100 V/V,

or 200 V/V. This matched gain resistor network

minimizes gain error and reduces the temperature

drift.

The INA185 operates from a single 2.7-V to 5.5-V

power supply. The device draws a maximum supply

current of 260 μA and features high slew rate and

bandwidth making this device an excellent choice for

many power-supply and motor-control applications.

The INA185 is available in an industry standard SC70

package and low profile 6-pin, SOT-563 package. The

SOT-563 package has a body size of size of only 2.56

mm2, including the device pins. All device options are

specified over the extended operating temperature

range of –40°C to +125°C.