5 Description (cont.)

Ultra-precise current measurements are achieved thanks to the combination of ultra-low offset voltage of ±12 µV

(maximum), small gain error of ±0.15% (maximum), and high DC CMRR of 160 dB (typical). The INAx290 is not

only designed for DC current measurement, but also for high-speed applications (like fast overcurrent protection,

for example) with a high bandwidth of 1.1 MHz (at gain of 20 V/V) and a 85-dB AC CMRR (at 50 kHz).

The INAx290 operates from a single 2.7-V to 20-V supply with the single channel device only drawing 370-µA

supply current (typical). The devices are available with five gain options: 20 V/V, 50 V/V, 100 V/V, 200 V/V, and

500 V/V. The low offset of the zero-drift architecture enables current sensing with low ohmic shunts as specified

over the extended operating temperature range (−40 °C to +125 °C).

6 Pin Configuration and Functions

1

OUT

2

GND

3

VS

4

IN+

5

IN±

Not to scale

Figure 6-1. DCK Package 5-Pin SC-70 Top View

IN+1

IN-1

IN+2

IN-2

VS

OUT1

OUT2

GND

A. Advanced information only

Figure 6-2. INA2290: DGK Package 8-Pin VSSOP

Top View

Pin Functions (Single channel device)

PIN

TYPE

DESCRIPTION

NAME

NO.

GND

2

Ground

Ground

IN–

5

Input

Connect to load side of shunt resistor

IN+

4

Input

Connect to supply side of shunt resistor

OUT

1

Output

Output voltage

VS

3

Power

Power supply

Pin Functions: INA2290 (Dual Channel)

PIN

TYPE

DESCRIPTION

NAME

NO.

GND

5

Ground

Ground

IN–1

2

Analog input

Current-sense amplifier negative input for channel 1. Connect to load side of

channel-1 sense resistor.

IN+1

1

Analog input

Current-sense amplifier positive input for channel 1. Connect to bus-voltage side

of channel-1 sense resistor.

IN–2

4

Analog input

Current-sense amplifier negative input for channel 2. Connect to load side of

channel-2 sense resistor.

IN+2

3

Analog input

Current-sense amplifier positive input for channel 2. Connect to bus-voltage side

of channel-2 sense resistor.

OUT1

7

Analog output

Channel 1 output voltage

OUT2

6

Analog output

Channel 2 output voltage

VS

8

Power

Power supply

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INA290, INA2290

SBOS961A – JUNE 2020 – REVISED SEPTEMBER 2020

Copyright © 2020 Texas Instruments Incorporated

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