INA129UA Texas Instruments amplifiers (SOIC-8) In Stock
INA129UA is a precision instrumentation amplifier by Texas Instruments in SOIC-8, gain 1-10000 via single resistor, +/-15V supply, from $6.25/10pcs, in stock, ships worldwide.
- Manufacturer
- Texas Instruments
- Package
- SOIC-8
- Pin Count
- 8
- Lifecycle
- ACTIVE
- Datasheet
- INA129UA Datasheet PDF
- Category
- amplifiers
- Price
- From $6.2500(MOQ 10)
- Temp Range
- -40.0°C to 85.0°C
- RoHS
- Compliant
- Lead Time
- 3–7 business days
- Shipping
- DHL Express · Worldwide
What is INA129UA used for?
Widely used in industrial bridge sensor amplification, medical instrumentation, and thermocouple signal conditioning. Also suitable for data acquisition front-ends and precision differential measurement circuits requiring high CMRR and low noise.
What are the specifications of INA129UA?
| supply_voltage | +/-2.25V to +/-18V |
| gain_range | 1 to 10000 |
| offset_voltage | 25uV max |
| cmrr | 100dB min at G=10 |
| quiescent_current | 1mA typical |
| bandwidth | 1MHz at G=1 |
| operating_temperature | -40C to +85C |
| Package | SOIC-8 |
Compliance & Regulatory
| RoHS Status | Compliant |
| Lead-Free | Yes (Pb-Free) |
| Moisture Sensitivity Level | MSL MSL1 |
Where can I find the INA129UA datasheet?
INA129UA Datasheet DownloadOfficial datasheet from Texas Instruments
What are equivalent replacements for INA129UA?
Compatible alternatives and drop-in replacements for INA129UA:
Frequently Asked Questions
What is the gain range of the INA129UA?
The INA129UA supports a gain range of 1 to 10,000, set by a single external resistor connected between pins 1 and 8. The formula is G = 1 + (50kOhm / RG). No resistor means G=1; a 5.56 Ohm resistor sets G=10,000.
What supply voltage does the INA129UA require?
The INA129UA operates on a wide dual supply range of +/-2.25V to +/-18V. It is commonly used at +/-15V in industrial systems and +/-5V in lower-power designs. Single-supply operation is also possible with proper biasing.
What are the typical applications of the INA129UA?
Typical applications include Wheatstone bridge amplification for load cells and pressure sensors, thermocouple signal conditioning, medical ECG front-ends, industrial data acquisition, and precision differential measurement circuits.
What package does the INA129UA come in?
The INA129UA is housed in an 8-pin SOIC-8 surface-mount package, offering a compact footprint for PCB integration. It is RoHS compliant and rated MSL1, allowing unlimited floor life at standard conditions.
What are common substitutes for the INA129UA?
Pin-compatible or functionally equivalent alternatives include the INA128UA (same family, pin-compatible), AD8221 by Analog Devices (lower noise), and INA163UA. Always verify supply range, gain formula, and offset specs before substituting.
Related Guides
XITCORP SSD Controllers: RISC-V Architecture and SM2/SM3/SM4 National Cryptography
How XITCORP pairs RISC-V multi-core controllers with hardware SM2/SM3/SM4 national cryptography, AES-256, and TCG Opal 2.0 across its SATA III and PCIe NVMe SSD controller lines.
Jul 12, 2026
SM2, SM3, SM4 National Cryptography in SSDs: A Design Guide for Secure Storage
How hardware SM2/SM3/SM4 engines deliver Guomi-certified full-disk encryption in SSDs, and when to choose national cryptography over AES-256 and TCG Opal 2.0.
Jul 12, 2026
Enterprise vs Industrial SSDs: How to Choose by PLP, DWPD, and Wide-Temperature Endurance
How to pick between enterprise and industrial SSDs using power-loss protection, DWPD/TBW endurance, and -40 to +85C wide-temperature qualification as the deciding factors.
Jul 12, 2026
150141RS73100 Red LED Indicator and Current-Resistor Design Guide
Design a reliable 150141RS73100 red LED indicator with worst-case resistor sizing, GPIO checks, PWM drive, layout, and production validation.
Jul 11, 2026
Why Buy from FindMyChip
About Texas Instruments
Texas Instruments (TI) is a global semiconductor company headquartered in Dallas, Texas. TI designs and manufactures analog and embedded processing chips used in industrial, automotive, consumer, communications, and enterprise systems.
More from Texas Instruments
| Qty. | Unit Price | Ext. Price |
|---|---|---|
| 10+ | $7.7800 | $77.80 |
| 25+ | $6.8200 | $170.50 |
| 75+ | $6.5000 | $487.50 |
| 525+ | $6.3900 | $3354.75 |
| 1050+ | $6.2500 | $6562.50 |
In Stock · 24h Response · Worldwide Shipping
Response within 24 hours · Worldwide shipping
“Their engineering team helped us find a pin-compatible alternative when our original MCU went EOL.”