Overview
The INA129UA/2K5E4 is a precision, low-power instrumentation amplifier produced by Texas Instruments. This amplifier is part of the INA12x series, which includes the INA128 and INA129 models. These amplifiers are designed for general-purpose use and offer excellent accuracy, making them suitable for a wide range of applications. The INA129UA/2K5E4 features a versatile three op-amp design and is available in small packages, including 8-pin plastic DIP and SO-8 surface-mount packages.
Key Specifications
| Parameter | Value |
|---|---|
| Package | 8-pin SOIC (0.154", 3.90mm Width) |
| Operating Temperature Range | -40°C to 125°C |
| Input Offset Voltage | 50 µV, maximum |
| Input Bias Current | 5 nA, maximum |
| Voltage Noise (RTI) | 8 nV/√Hz |
| Common Mode Rejection Ratio (CMRR) | 120 dB, minimum |
| Bandwidth | 1.3 MHz (G = 1) |
| Input Protection | ±40 V |
| Supply Voltage Range | ±2.25 V to ±18 V |
| Quiescent Current | 700 µA |
| Slew Rate | 4 V/µs |
| Output Current per Channel | 15 mA |
Key Features
- Low offset voltage: 50 µV, maximum
- Low drift: 0.5 µV/°C, maximum
- Low input bias current: 5 nA, maximum
- Low noise: 8 nV/√Hz, 0.2 µVpp
- High CMRR: 120 dB, minimum
- Bandwidth: 1.3 MHz (G = 1)
- Inputs protected to ±40 V
- Wide supply range: ±2.25 V to ±18 V
- Low quiescent current: 700 µA
- Single external resistor sets any gain from 1 to 10,000
Applications
- Pressure transmitters
- Temperature transmitters
- Weigh scales
- Electrocardiogram (ECG) systems
- Analog input modules
- Data acquisition (DAQ) systems
Q & A
- What is the operating temperature range of the INA129UA/2K5E4?
The operating temperature range is -40°C to 125°C.
- What is the input offset voltage of the INA129UA/2K5E4?
The input offset voltage is 50 µV, maximum.
- What is the input bias current of the INA129UA/2K5E4?
The input bias current is 5 nA, maximum.
- What is the bandwidth of the INA129UA/2K5E4 at a gain of 1?
The bandwidth is 1.3 MHz at a gain of 1.
- How is the gain set for the INA129UA/2K5E4?
The gain is set using a single external resistor and can be adjusted from 1 to 10,000.
- What is the supply voltage range for the INA129UA/2K5E4?
The supply voltage range is ±2.25 V to ±18 V.
- What is the quiescent current of the INA129UA/2K5E4?
The quiescent current is 700 µA.
- What type of packages are available for the INA129UA/2K5E4?
The amplifier is available in 8-pin plastic DIP and SO-8 surface-mount packages.
- What are some common applications of the INA129UA/2K5E4?
Common applications include pressure transmitters, temperature transmitters, weigh scales, ECG systems, analog input modules, and data acquisition systems.
- How is the input protection for the INA129UA/2K5E4?
The inputs are protected to ±40 V.
