INA122UIn StockTexas Instruments
INA122U is a precision instrumentation amplifier in SOIC-8 from Texas Instruments with 25μV max offset, 100dB CMRR, and ±2.25V–±18V supply. Priced from $3.65, in stock, ships globally, 1 piece minimum.
- Manufacturer
- Texas Instruments
- Package
- SOIC-8
- Pin Count
- 8
- Lifecycle
- ACTIVE
- Datasheet
- INA122U Datasheet PDF
- Category
- amplifiers
- Price
- From $3.6528(MOQ 1)
- Temp Range
- -40.0°C to 85.0°C
- RoHS
- Compliant
- Lead Time
- 3–7 business days
- Shipping
- DHL Express · Worldwide
Applications
The INA122U is widely used in medical instrumentation, industrial process control, and data acquisition systems where accurate amplification of small differential signals is critical. It suits bridge sensor interfaces, thermocouple amplifiers, and ECG/EEG front-end circuits.
Specifications
| Supply Voltage | ±2.25V to ±18V |
| Input Offset Voltage | 25μV max |
| CMRR | 100dB min |
| Gain Range | 1 to 10,000 |
| Quiescent Current | 450μA typical |
| Operating Temperature | -40°C to +85°C |
| Package | SOIC-8 |
| Package | SOIC-8 |
Compliance & Regulatory
| RoHS Status | Compliant |
| Lead-Free | Yes (Pb-Free) |
Alternate & Equivalent Parts
Compatible alternatives and drop-in replacements for INA122U:
Frequently Asked Questions
How do I set the gain on the INA122U?
Gain is set by connecting a single external resistor RG between pins 1 and 8. The gain formula is G = 1 + (200kΩ / RG). For example, RG = 2kΩ sets gain to 101. No external resistor means G = 1.
What is the supply voltage range for the INA122U?
The INA122U operates from ±2.25V to ±18V dual supply, or a single 4.5V to 36V supply. This wide range makes it suitable for both 5V microcontroller systems and ±15V industrial analog environments.
What package is the INA122U available in?
The INA122U comes in an 8-pin SOIC (Small Outline IC) package with a 1.27mm pitch, suitable for standard SMD assembly. A DIP-8 version (INA122P) is also available for through-hole designs.
What are typical applications for the INA122U?
The INA122U is commonly used in bridge sensor amplifiers, medical instrumentation (ECG, EEG), industrial process control, thermocouple signal conditioning, and precision data acquisition front-ends where high CMRR and low offset are critical.
What are compatible substitute parts for the INA122U?
Pin-compatible and functionally similar alternatives include the INA128U and INA129U (lower noise, higher precision), INA126UA (lower power), and AD8221 from Analog Devices. Always verify gain-setting resistor formula and supply requirements 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 |
|---|---|---|
| 1+ | $11.6157 | $11.62 |
| 3+ | $9.7500 | $29.25 |
| 10+ | $8.7500 | $87.50 |
| 51+ | $3.9497 | $201.43 |
| 66+ | $3.8012 | $250.88 |
| 83+ | $3.6528 | $303.18 |
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Response within 24 hours · Worldwide shipping
“Their engineering team helped us find a pin-compatible alternative when our original MCU went EOL.”