INA129UAIn StockTexas Instruments
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
Applications
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.
Specifications
| 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 |
Alternate & Equivalent Parts
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.
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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.
| 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 |
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