INA121PA

Overview

The INA121PA is a FET-input, low power instrumentation amplifier from Texas Instruments. It features a versatile three-op amp design and very small size. Key electrical parameters include an input bias current of 50 pA, input offset voltage of 500 uV, maximum supply voltage of 36 V, and minimum supply voltage of 4.5 V. The device offers excellent accuracy and is available in a DIP8 package.

Feature Summary

• FET-input architecture for low power consumption
• Three-op amp design for high versatility
• Very small physical size

Applications

• Precision measurement systems
• Low power data acquisition
• Sensor signal conditioning

Procurement Notes

Verify the specific ordering suffix to ensure correct packaging and temperature range. Confirm RoHS compliance status through official manufacturer documentation before procurement. Check for any recent lifecycle changes or obsolescence notices directly from Texas Instruments to ensure long-term availability.

Selection Notes

Select this component when low input bias current and high precision are required in a compact form factor. Ensure the application voltage stays within the 4.5 V to 36 V range. Consider the FET input stage for high impedance source applications where minimal loading is critical.

Part Context

The INA121PA belongs to the INA121 family of instrumentation amplifiers. It is manufactured by Texas Instruments, formerly associated with Burr-Brown. The PA suffix typically denotes a plastic DIP package variant. This series is known for combining high performance with low power consumption.

Replacement Considerations

Public confirmed substitute part numbers were not found in the provided source material.