INA122UE4 Texas Instruments Integrated Circuit (Small Outline Packages) In Stock
INA122UE4 is a single-supply micropower instrumentation amplifier from Texas Instruments with 83 dB minimum CMRR and 500 µV maximum input offset voltage. It operates on supplies from 2.2 V to 36 V with 0.12 MHz bandwidth and 25 nA bias current in an 8-pin SOIC package. Available from stock with worldwide shipping.
- Manufacturer
- Texas Instruments
- Package
- Small Outline Packages
- Pin Count
- 8
- Lifecycle
- OBSOLETE
- Datasheet
- INA122UE4 Datasheet PDF
- Category
- Integrated Circuit
- Temp Range
- -40.0°C to 85.0°C
- RoHS
- Compliant
- Lead Time
- 3–7 business days
- Shipping
- DHL Express · Worldwide
What are the key features of INA122UE4?
- Single-supply micropower instrumentation amplifier with 83 dB minimum CMRR and 25 nA max bias current for high-accuracy low-power sensor signal conditioning
- Wide supply range from 2.2 V single-supply to ±18 V dual-supply enables use across battery-powered and bench-powered measurement systems
- Single external resistor sets gain from 1 to 10000 with 0.12 MHz bandwidth, simplifying design for bridge sensors and thermocouple amplifiers in 8-pin SOIC
What is INA122UE4 used for?
The INA122UE4 is designed for precision amplification of small differential signals from Wheatstone bridge sensors, strain gauges, and thermocouple amplifiers in single-supply battery-operated instrumentation. Its micropower quiescent current makes it suitable for always-on data loggers, remote sensor nodes, and portable medical devices requiring continuous measurement without rapidly depleting a battery. The high 83 dB CMRR ensures accurate reading even in electrically noisy industrial environments where large common-mode voltages from motor drives or power lines appear on sensor leads.
What are the specifications of INA122UE4?
| YTEOL | 0 |
| Amplifier Type | INSTRUMENTATION AMPLIFIER |
| Average Bias Current-Max (IIB) | 0.025 µA |
| Bandwidth (3dB)-Nom | 0.12MHz |
| Common-mode Reject Ratio-Min | 83dB |
| Input Offset Current-Max (IIO) | 0.005 µA |
| Input Offset Voltage-Max | 500 µV |
| JESD-30 Code | R-PDSO-G8 |
| JESD-609 Code | e4 |
| Neg Supply Voltage Limit-Max | -18 V |
| Non-linearity-Max | 0.012% |
| Number of Functions | 1 |
| Package Body Material | PLASTIC/EPOXY |
| Package Equivalence Code | SOP8,.25 |
| Package Shape | RECTANGULAR |
| Package Style | SMALL OUTLINE |
| Packing Method | TUBE |
| Peak Reflow Temperature (Cel) | 260 |
| Qualification Status | Not Qualified |
| Screening Level | TS 16949 |
| Slew Rate-Nom | 0.08V/us |
| Supply Current-Max | 0.085mA |
| Supply Voltage Limit-Max | 18V |
| Supply Voltage-Nom (Vsup) | 15V |
| Surface Mount | YES |
| Temperature Grade | INDUSTRIAL |
| Terminal Finish | NICKEL PALLADIUM GOLD |
| Terminal Form | GULL WING |
| Terminal Pitch | 1.27mm |
| Terminal Position | DUAL |
| Time@Peak Reflow Temperature-Max (s) | 30 |
| Voltage Gain-Max | 10000 |
| Voltage Gain-Min | 5 |
| Voltage Gain-Nom | 100 |
| Package | Small Outline Packages |
Compliance & Regulatory
| RoHS Status | Compliant |
| Lead-Free | Yes (Pb-Free) |
| Moisture Sensitivity Level | MSL 3 |
| ECCN | EAR99 |
| HTS Code | 8542.33.00.01 |
Where can I find the INA122UE4 datasheet?
INA122UE4 Datasheet DownloadOfficial datasheet from Texas Instruments
What are equivalent replacements for INA122UE4?
Compatible alternatives and drop-in replacements for INA122UE4:
Amplifier, 1 Func, 250uV Offset-Max, 0.12MHz Band Width, BIPolar, PDSO8
Frequently Asked Questions
What is the CMRR and input offset voltage of the INA122UE4, and why do these matter for bridge sensor measurements?
The INA122UE4 provides a minimum CMRR of 83 dB and a maximum input offset voltage of 500 µV. For a Wheatstone bridge with a full-scale output of 10 mV, the 500 µV offset represents a 5% initial error that must be trimmed or calibrated out, while the 83 dB CMRR attenuates 60 Hz mains interference by a factor of 14000, preventing noise from corrupting the bridge signal measurement.
How is gain set on the INA122UE4 and what gain values are achievable?
Gain on the INA122UE4 is set by a single external resistor connected between the RG pins, with gain ranging from 1 (no resistor, open circuit) to 10000 (using a resistor value calculated from G = 1 + 5000 Ω / RG). Common gain settings such as 100, 500, and 1000 require RG values of 50.5 Ω, 10.0 Ω, and 5.05 Ω respectively, achievable with standard 1% resistors.
What supply voltage range does INA122UE4 support, and how does it perform in a single 3.3 V system?
The INA122UE4 operates from a 2.2 V single-supply up to ±18 V dual-supply, making it fully compatible with 3.3 V microcontroller-based systems. At 3.3 V single supply, the output swing is limited by the rail-to-rail input and output headroom, typically operating within 100 mV of each supply rail, so the ADC reference and signal range should be planned accordingly for the 0.12 MHz bandwidth and 83 dB CMRR performance.
When should INA122UE4 be chosen over a standard op-amp for a strain gauge amplifier design?
The INA122UE4 should be chosen over a standard op-amp when the design requires high CMRR of 83 dB, low 25 nA bias current, and single-resistor gain control in a 4-resistor Wheatstone bridge circuit. Implementing equivalent performance with discrete op-amps requires a 3-op-amp instrumentation amplifier topology with 7 precision resistors matched to 0.01%, increasing component count and PCB area by a factor of 3 compared to the single 8-pin INA122UE4 solution.
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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.
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