1

FEATURES

DESCRIPTION

APPLICATIONS

SampleRequest

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50kW

150kW

150kW

A

1

A

3

V

OUT

V

IN-

6

REF

5

RFIFilteredInputs

2

V+

7

V-

4

1

8

150kW

150kW

50kW

A

2

V

IN+

RFIFilteredInputs

3

INA333

R

G

G=1+

100kW

R

G

RFIFilteredInputs

RFIFilteredInputs

INA333

Micro-Power (50

µA), Zerø-Drift, Rail-to-Rail Out

Instrumentation Amplifier

2

• LOW OFFSET VOLTAGE: 25µV (max), G ≥ 100

The INA333 is a low-power, precision instrumentation

amplifier offering excellent accuracy. The versatile

• LOW DRIFT: 0.1µV/°C, G ≥ 100

3-op amp design, small size, and low power make it

• LOW NOISE: 50nV/√Hz, G ≥ 100

ideal for a wide range of portable applications.

• HIGH CMRR: 100dB (min), G ≥ 10

A single external resistor sets any gain from 1 to

• LOW INPUT BIAS CURRENT: 200pA (max)

1000.

The

INA333

is

designed

to

use

an

• SUPPLY RANGE: +1.8V to +5.5V

industry-standard gain equation: G = 1 + (100k

• INPUT VOLTAGE: (V–) +0.1V to (V+) –0.1V

The INA333 provides very low offset voltage (25

µV,

• OUTPUT RANGE: (V–) +0.05V to (V+) –0.05V

G

≥ 100), excellent offset voltage drift (0.1

µV/°C,

G

≥ 100), and high common-mode rejection (100dB

• LOW QUIESCENT CURRENT: 50µA

at G

≥ 10). It operates with power supplies as low as

• OPERATING TEMPERATURE: –40°C to +125°C

1.8V

(±0.9V),

and

quiescent

current

is

only

• RFI FILTERED INPUTS

50

µA—ideal for battery-operated systems. Using

autocalibration

techniques

to

ensure

excellent

• MSOP-8 AND DFN-8 PACKAGES

precision over the extended industrial temperature

range, the INA333 also offers exceptionally low noise

density (50nV/

√Hz) that extends down to dc.

• BRIDGE AMPLIFIERS

The INA333 is available in both MSOP-8 and DFN-8

• ECG AMPLIFIERS

surface-mount packages and is specified over the

• PRESSURE SENSORS

• MEDICAL INSTRUMENTATION

blank

• PORTABLE INSTRUMENTATION

• WEIGH SCALES

• THERMOCOUPLE AMPLIFIERS

• RTD SENSOR AMPLIFIERS

• DATA ACQUISITION

1

Please be aware that an important notice concerning availability, standard warranty, and use in critical applications of Texas

Instruments semiconductor products and disclaimers thereto appears at the end of this data sheet.

2

All trademarks are the property of their respective owners.

PRODUCTION DATA information is current as of publication date.

Copyright © 2008, Texas Instruments Incorporated

Products conform to specifications per the terms of the Texas

Instruments standard warranty. Production processing does not

necessarily include testing of all parameters.