INA129SKGD1

Overview

The INA129SKGD1 is a high-temperature precision, low-power instrumentation amplifier die from Texas Instruments. It features a three-op-amp architecture with current-feedback inputs for wide bandwidth at high gains. The device offers a gain range of 1 V/V to 10,000 V/V via a single external resistor. Key electrical specifications include a 1.3 MHz bandwidth, 4 V/us slew rate, and 113 dB common-mode rejection ratio. It operates on supply voltages between 4.5 V and 36 V with a typical quiescent current of 2 mA. The component is rated for an extended operating temperature range from -55°C to +210°C.

Feature Summary

• High-temperature operation up to 210°C
• Precision performance with low power consumption
• Wide bandwidth maintained at high gain settings
• Single-resistor gain adjustment capability

Applications

• Harsh environment industrial sensing
• High-temperature data acquisition systems
• Precision measurement instrumentation
• Aerospace and defense electronics
• Medical equipment requiring extreme reliability

Procurement Notes

Verify the specific suffix 'SKGD1' indicates the die form factor and high-temperature grade directly from the official Texas Instruments datasheet. Confirm that the package type matches your substrate or assembly process requirements. Ensure compatibility with the specified voltage and temperature limits for your target application environment before finalizing procurement.

Selection Notes

Select this component when standard commercial-grade amplifiers fail under extreme thermal conditions. The die format requires careful consideration of mounting and interconnection methods compared to packaged versions. Evaluate the need for the extended 210°C rating against cost and availability constraints. Compare input bias current and offset voltage specifications against system accuracy requirements.

Part Context

This part belongs to the INA12x family of instrumentation amplifiers, which are known for their versatility and accuracy. The SKGD1 designation specifically denotes the high-temperature variant in die form. This family is widely used in applications requiring precise signal conditioning from low-level sensors. The design supports both plastic DIP and surface-mount packages in other variants within the same series.

Replacement Considerations

Official substitutes within the INA12x family include the INA128SKGD1. Verify if the gain equation differences due to internal resistor tolerances affect your circuit design. Ensure that any replacement maintains the required high-temperature rating and die form factor compatibility.