0

500

1000

1500

2000

2500

3000

3500

4000

4500

Input Offset Voltage Drift ( V/

ƒC)

C001

+

±

+

±

+

±

40 k

25 k

40 k

40 k

40 k

25 k

Overvoltage

Protection

Overvoltage

Protection

RG

REF

+VS

OUT

-VS

-IN

+IN

RG

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Design

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.

INA828

SBOS792A – AUGUST 2017 – REVISED JANUARY 2018

INA828 50-µV Offset, 7-nV/

√Hz Noise, Low-Power, Precision Instrumentation Amplifier

1

1 Features

1

•

Precision Instrumentation Amplifier Evolution:

–

Second Generation: INA828

–

First Generation: INA128

•

Low Offset Voltage: 50 µV, MAX

•

Gain Drift: 5 ppm/°C (G = 1), 50 ppm/°C (G > 1)

•

Noise: 7 nV/

√Hz

•

Bandwidth: 2 MHz (G = 1), 260 kHz (G = 100)

•

Stable with 1-nF Capacitive Loads

•

Inputs Protected Up to ±40 V

•

Common-Mode Rejection:

–

110 dB, MIN (G = 10)

•

Power-Supply Rejection: 100 dB, MIN (G = 1)

•

Supply Current: 650 µA, MAX

•

Supply Range:

–

Single Supply: 4.5 V to 36 V

–

Dual Supply: ±2.25 V to ±18 V

•

Specified Temperature Range:

–40°C to +125°C

•

Package: 8-Pin SOIC

2 Applications

•

Industrial Process Controls

•

Circuit Breakers

•

Battery Testers

•

ECG Amplifiers

•

Power Automation

•

Medical Instrumentation

•

Portable Instrumentation

3 Description

The INA828 is a high-precision instrumentation

amplifier that offers low power consumption and

operates over a very wide single- or dual-supply

range. A single external resistor sets any gain from 1

to 1000. The device offers excellent precision due to

the use of new super-beta input transistors which

provide exceptionally low input offset voltage, offset

voltage drift, input bias current, and input voltage and

current noise. Additional circuitry protects the inputs

against overvoltage up to ±40 V.

The

INA828

is

optimized

to

provide

excellent

common-mode rejection ratio. At G = 1, the common-

mode rejection ratio exceeds 90 dB across the full

input common-mode range. The device is well-suited

for low-voltage operation from a 5-V single supply as

well as dual supplies up to ±18 V. Finally, INA828 is

available in an 8-pin SOIC package and specified

over the –40°C to +125°C temperature range.

Device Information(1)

PART NUMBER

PACKAGE

BODY SIZE (NOM)

INA828

SOIC (8)

4.90 mm × 3.91 mm

(1) For all available packages, see the orderable addendum at

the end of the data sheet.

INA828 Simplified Internal Schematic

Typical Distribution of Input Offset Voltage Drift