Key Selection Information
| Selection Parameter | Confirmed Information |
|---|---|
| Quiescent Current | 175 µA per channel |
| Supply | ±1.35 V to ±18 V |
| Gain Range | 5 V/V to 10,000 V/V with one external resistor |
| Offset Voltage | 250 µV maximum |
| Offset Drift | 3 µV/°C maximum |
| Input Bias Current | 25 nA maximum |
| Input Noise | 35 nV/√Hz stated feature |
| Exact Package / Packing | SOIC (D), 8 pins; 2500-piece large tape and reel |
Product Overview
INA126UA/2K5 is a micropower instrumentation amplifier aimed at sensor interfaces where supply current matters more than very low offset or wide bandwidth. The two-op-amp architecture consumes about 175 µA and supports a broad ±1.35 V to ±18 V supply range.
Gain starts at 5 rather than unity and can be extended to 10,000 with one resistor. That is useful for low-level sensors that always require amplification, but it makes INA126 unsuitable when a unity-gain instrumentation stage is required.
The UA grade is the precision SOIC ordering option in a 2500-piece reel. Its core tradeoff is clear: lower power than INA118/INA821-class devices, but higher offset, drift and noise.
For related devices, see HKEQGOO’s Instrumentation Amplifiers category.
Technical Specifications
| Parameter | Verified Information |
|---|---|
| Manufacturer | Texas Instruments |
| Exact MPN | INA126UA/2K5 |
| Quiescent Current | 175 µA per channel |
| Supply | ±1.35 V to ±18 V |
| Gain Range | 5 V/V to 10,000 V/V with one external resistor |
| Offset Voltage | 250 µV maximum |
| Offset Drift | 3 µV/°C maximum |
| Input Bias Current | 25 nA maximum |
| Input Noise | 35 nV/√Hz stated feature |
| Exact Package / Packing | SOIC (D), 8 pins; 2500-piece large tape and reel |
| Manufacturer Status | Active / Production |
| Part Marking | INA 126U A |
Functional Highlights
MicroPower operation is the primary selection advantage
At 175 µA, INA126 can materially reduce analog-front-end current in battery-powered or loop-powered sensing. The cost is looser 250 µV offset, 3 µV/°C drift and 35 nV/√Hz noise compared with higher-performance INAs.
Minimum gain of five affects signal-chain architecture
The internal topology is not intended for G=1 buffering. Sensor full-scale amplitude and ADC range should be checked to ensure the required minimum gain does not overdrive later stages.
Design Considerations
- Confirm the signal chain can accept a minimum gain of 5 V/V.
- Budget offset and drift at the actual gain and temperature range rather than comparing quiescent current alone.
- Use a stable RG because external resistor tolerance directly affects gain.
Product Status and Exact Order Code
Manufacturer status: Active / Production
Texas Instruments lists INA126UA/2K5 as Active / Production; SOIC (D), 8 pins; 2500-piece large tape and reel; Level-2-260C-1 YEAR; marking INA 126U A.
Related Engineering Resources
Quality & Verification Support
Third-party inspection or testing can be arranged according to customer requirements. Testing fees are borne by the buyer. Additional verification requirements can be discussed before shipment. After an order is placed, physical product, label, packaging, and Date Code photos may be provided where appropriate.
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