Texas Instruments INA128UA
| Parameters | |
|---|---|
| Series | - |
| Moisture Sensitivity Level (MSL) | 3 (168 Hours) |
| RoHS Status | ROHS3 Compliant |
| Package / Case | 8-SOIC (0.154", 3.90mm Width) |
| Mfr | Texas Instruments |
| Mounting Type | Surface Mount |
| Operating Temperature | -40°C ~ 125°C |
| Current - Supply | 700µA |
| Output Type | - |
| Number of Circuits | 1 |
| Slew Rate | 4V/µs |
| Supplier Device Package | 8-SOIC |
| -3db Bandwidth | 1.3 MHz |
| Current - Input Bias | 2 nA |
| Amplifier Type | Instrumentation |
| Voltage - Input Offset | 25 µV |
| Current - Output / Channel | 15 mA |
| Package | Tube |
| Product Status | Active |
| Base Product Number | INA128 |
| REACH Status | REACH Unaffected |
| Standard Package | 75 |
| ECCN | EAR99 |
| HTSUS | 8542.33.0001 |
| Voltage - Supply Span (Min) | 4.5 V |
| Voltage - Supply Span (Max) | 36 V |
INA128UA – Precision, Low-Power Instrumentation Amplifier with 130dB CMRR
The INA128UA from Texas Instruments is a high-precision, low-power instrumentation amplifier designed for applications requiring accurate differential signal amplification in noisy environments. Operating over a wide supply voltage range (±2.25V to ±18V), it delivers exceptional performance with a 130dB common-mode rejection ratio (CMRR) and a low input offset voltage of 125µV, making it ideal for medical instrumentation, industrial sensors, and test equipment. The device features a fixed gain of 10,000 (adjustable via external resistors) and a bandwidth of 1.3MHz, ensuring high-fidelity signal amplification. Packaged in an 8-pin SOIC, the INA128UA supports an extended operating temperature range (-40°C to +125°C) and consumes only 700µA of quiescent current, making it suitable for battery-powered systems. Its robust design includes ±15V input protection and low noise, enabling reliable performance in high-precision measurement applications.
Key Features & Benefits
The INA128UA excels in low-power precision amplification, offering a high slew rate of 4V/µs and a gain bandwidth product (GBP) of 1.3MHz, ensuring fast and accurate signal processing. Its ultra-low input bias current (2nA) minimizes errors in high-impedance sensor interfaces, while the integrated EMI/RFI filtering enhances noise immunity in electrically noisy environments. The amplifier's three-op-amp architecture provides excellent linearity and stability, with a wide common-mode input range that extends beyond the supply rails. Additionally, the RoHS-compliant, lead-free SOIC-8 package ensures easy PCB integration in space-constrained designs. Key applications include strain gauge amplifiers, ECG systems, bridge sensors, and data acquisition modules.
Applications
The INA128UA is widely used in medical devices (ECG, EEG, blood pressure monitors), industrial automation (load cells, pressure transducers), and precision data acquisition systems. Its ability to reject common-mode noise (e.g., 50/60Hz power-line interference) makes it ideal for sensor signal conditioning in harsh environments. Other applications include thermocouple amplifiers, RTD interfaces, and automotive sensor modules, where high accuracy and low drift are critical.
