A

1

A

2

A

3

40 kW

40 kW

40 kW

40 kW

V

IN

2

1

8

3

6

5

V

IN

R

G

V+

V-

Ref

V

O

G = 1 +

49.4 kW

R

G

+

4

7

INA128, INA129

Over-Voltage

Protection

Over-Voltage

Protection

-

25 kW

(1)

25 kW

(1)

NOTE: (1) INA129: 24.7 kW

G = 1 +

50 kW

R

G

INA128:

INA129:

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Folder

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INA128-HT, INA129-HT

SBOS501F – JANUARY 2010 – REVISED FEBRUARY 2015

INA12x-HT Precision, Low-Power Instrumentation Amplifiers

1 Features

3 Description

The INA128-HT and INA129-HT are low-power,

1

•

Low Offset Voltage: 25 uV Typical

general-purpose instrumentation amplifiers offering

•

Low Input Bias Current: 50 nA Typical (1)

excellent accuracy. The versatile three-operational-

•

High CMR: 95 dB Typical(1)

amplifier design and small size make them ideal for a

wide range of applications. Current-feedback input

•

Inputs Protected to ±40 V

circuitry provides wide bandwidth even at high gain. A

•

Wide Supply Range: ±2.25 V to ±18 V

single external resistor sets any gain from 1 to 10000.

•

Low Quiescent Current: 2 mA Typical(1)

The INA128-HT provides an industry-standard gain

equation; the INA129-HT gain equation is compatible

2 Applications

with the AD620.

•

Bridge Amplifiers

The INA128-HT and INA129-HT are laser trimmed for

very low offset voltage (25

μV Typ) and high

•

Thermocouple Amplifiers

common-mode rejection (93 dB at G

≥ 100). These

•

RTD Sensor Amplifiers

devices operate with power supplies as low as ±2.25

•

Medical Instrumentation

V, and quiescent current of 2 mA, typically. Internal

•

Data Acquisition

input protection can withstand up to ±40 V without

damage.

•

Supports Extreme Temperature Applications:

Texas Instruments' high-temperature products use

–

Controlled Baseline

highly optimized silicon (die) solutions with design

–

One Assembly/Test Site

and process enhancements to maximize performance

–

One Fabrication Site

over extended temperatures.

–

Available in Extreme Temperature Ranges

The INA129-HT is available in 8-pin ceramic DIP and

(–55°C to 210°C) (2)

8-pin ceramic surface-mount packages, specified for

–

Extended Product Life Cycle

the –55°C to 210°C temperature range. The INA128-

HT is available in an 8-pin SOIC-8 surface-mount

–

Extended Product-Change Notification

package,

specified

for

the

–55°C

to

175°C

–

Product Traceability

temperature range.

Device Information(1)

PART NUMBER

PACKAGE

BODY SIZE (NOM)

INA128-HT

SOIC (8)

4.90 mm × 3.91 mm

CFP (8)

6.90 mm × 5.65 mm

INA129-HT

CDIP SB (8)

11.81 mm × 7.49 mm

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

(1)

Typical values for 210°C application.

the end of the data sheet.

(2)

Custom temperature ranges available.

4 Simplified Schematic

1

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.