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.