1 Features

1• Low Offset Voltage

• Low Input Bias Current

• High CMR: 95 dB (Typical)

• Inputs Protected to ±40 V

• Wide Supply Range: ±2.25 V to ±18 V

• Low Quiescent Current: 2 mA (Typical)

2 Applications

• Bridge Amplifier

• Thermocouple Amplifier

• RTD Sensor Amplifier

• Medical Instrumentation

• Data Acquisition

• Supports Extreme Temperature Applications:

– Controlled Baseline

– One Assembly and Test Site

– One Fabrication Site

– Available in Military (–55°C to +125°C)

Temperature Range (1)

– Extended Product Life Cycle

– Extended Product-Change Notification

– Product Traceability

3 Description

The INA129-EP device is a low power, general-

purpose instrumentation amplifier offering excellent accuracy. The versatile 3-op amp design and small

size make the device ideal for a wide range of

applications. Current-feedback input circuitry provides

wide bandwidth even at high gain (200 kHz at G = 100).

A single external resistor sets any gain from 1 to

10,000. The INA129-EP provides an industry- standard gain equation; the INA129-EP gain equation

is compatible with the AD620.

The INA129-EP device is laser trimmed for very low

offset voltage, drift, and high common-mode rejection

(113 dB at G ≥ 100). It operates with power supplies

as low as ±2.25 V, and quiescent current is only 750 μA–ideal for battery operated systems. Internal input

protection can withstand up to ±40 V without damage.

The INA129-EP is available in a 8-Pin SOIC surface-

mount package specified for the –55°C to 125°C

temperature range.