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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.

INA826

SBOS562G – AUGUST 2011 – REVISED JUNE 2020

INA826 Precision, 200-µA Supply Current, 3-V to 36-V Supply

Instrumentation Amplifier With Rail-to-Rail Output

1

1 Features

1

•

Input common-mode range: Includes V–

•

Common-mode rejection:

–

104 dB, min (G = 10)

–

100 dB, min at 5 kHz (G = 10)

•

Power-supply rejection: 100 dB, min (G = 1)

•

Low offset voltage: 150 µV, max

•

Gain drift: 1 ppm/°C (G = 1), 35 ppm/°C (G > 1)

•

Noise: 18 nV/

√Hz, G ≥ 100

•

Bandwidth: 1 MHz (G = 1), 60 kHz (G = 100)

•

Inputs protected up to ±40 V

•

Rail-to-rail output

•

Supply current: 200 µA

•

Supply range:

–

Single supply: 3 V to 36 V

–

Dual supply: ±1.5 V to ±18 V

•

Specified temperature range:

–40°C to +125°C

•

Packages: 8-pin VSSOP, SOIC, and WSON

2 Applications

•

Analog input module

•

Flow transmitter

•

Battery test

•

LCD test

•

Electrocardiogram (ECG)

•

Surgical equipment

•

Process analytics (pH, gas, concentration, force

and humidity)

•

Circuit breaker (ACB, MCCB, VCB)

3 Description

The

INA826

is

a

cost-effective

instrumentation

amplifier that offers extremely low power consumption

and operates over a very wide single-supply or dual-

supply range. A single external resistor sets any gain

from 1 to 1000. The device offers excellent stability

over temperature, even at G > 1, as a result of the

low gain drift of only 35 ppm/°C (maximum).

The

INA826

is

optimized

to

provide

excellent

common-mode rejection ratio of over 100 dB (G = 10)

over frequencies up to 5 kHz. At G = 1, the common-

mode rejection ratio exceeds 84 dB across the full

input common-mode range, from the negative supply

all the way up to 1 V of the positive supply. Using a

rail-to-rail output, the INA826 is a great choice for

low-voltage operation from a 3-V single supply, as

well as dual supplies up to ±18 V.

Additional

circuitry

protects

the

inputs

against

overvoltage of up to ±40 V beyond the power

supplies by limiting the input currents to less than

8 mA.

The INA826 is available in 8-pin SOIC, VSSOP, and

tiny 3-mm × 3-mm WSON surface-mount packages.

All versions are specified for the –40°C to +125°C

temperature range.

Device Information(1)

PART NUMBER

PACKAGE

BODY SIZE (NOM)

INA826

SOIC (8)

4.90 mm × 3.91 mm

WSON (8)

3.00 mm × 3.00 mm

VSSOP (8)

3.00 mm × 3.00 mm

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

at the end of the data sheet.

General-Purpose Instrumentation Amplifier

(1)

This resistor is optional if the input voltage stays above [(V–) – 2 V] or if the signal source current drive capability is

limited to less than 3.5 mA; see the Input Protection section for more details.