Overview
The INA141U/2K5 is a precision, low-power instrumentation amplifier produced by Texas Instruments. It is designed for general-purpose applications and offers excellent accuracy and versatility. The device features a three-op-amp design and current-feedback input circuitry, which provides wide bandwidth even at high gain settings, such as 200 kHz at a gain of 100 V/V. The INA141U/2K5 is laser trimmed for very low offset voltage, drift, and high common-mode rejection, making it an excellent choice for a wide range of applications. It operates with power supplies as low as ±2.25 V and has a low quiescent current of 750 µA, making it suitable for battery-operated systems.
Key Specifications
| Parameter | Conditions | Min | Max | Units | |
|---|---|---|---|---|---|
| Offset Voltage, RTI | G = 100 | ±20 | ±50 | ±125 | µV |
| G = 10 | ±50 | ±100 | ±250 | µV | |
| Offset Voltage Drift | G = 100 | ±0.2 | ±0.5 | ±1.5 | µV/°C |
| G = 10 | ±0.5 | ±2 | ±2.5 | µV/°C | |
| Gain Error | G = 10 | ±0.01 | ±0.05 | % | |
| G = 100 | ±0.03 | ±0.075 | % | ||
| Input Bias Current | ±2 | ±5 | nA | ||
| Common-Mode Rejection Ratio (CMRR) | G = 100 | 117 | 125 | dB | |
| Supply Voltage | ±2.25 | ±18 | V | ||
| Quiescent Current | 750 | µA | |||
| Operating Temperature | –40 | +85 | °C |
Key Features
- Low offset voltage: 50 µV maximum at G = 100 V/V
- Low drift: 0.5 µV/°C maximum at G = 100 V/V
- Accurate gain: ±0.05% at G = 10 V/V
- Low input bias current: 5 nA maximum
- High common-mode rejection ratio (CMRR): 117 dB minimum at G = 100 V/V
- Inputs protected to ±40 V
- Wide supply range: ±2.25 V to ±18 V
- Low quiescent current: 750 µA
- Available in 8-pin SOIC package
Applications
- Temperature transmitter
- Medical instrumentation
- Data acquisition (DAQ)
- Process analytics (pH, gas, concentration, force, and humidity)
- Bridge amplifier
- Thermocouple amplifier
- RTD sensor amplifier
Q & A
- What is the typical offset voltage of the INA141U/2K5? The typical offset voltage is 50 µV maximum at G = 100 V/V.
- What is the drift of the INA141U/2K5? The drift is 0.5 µV/°C maximum at G = 100 V/V.
- What is the gain accuracy of the INA141U/2K5? The gain accuracy is ±0.05% at G = 10 V/V.
- What is the input bias current of the INA141U/2K5? The input bias current is 5 nA maximum.
- What is the common-mode rejection ratio (CMRR) of the INA141U/2K5? The CMRR is 117 dB minimum at G = 100 V/V.
- How are the inputs of the INA141U/2K5 protected? The inputs are protected to ±40 V.
- What is the supply voltage range of the INA141U/2K5? The supply voltage range is ±2.25 V to ±18 V.
- What is the quiescent current of the INA141U/2K5? The quiescent current is 750 µA.
- In what package is the INA141U/2K5 available? The INA141U/2K5 is available in an 8-pin SOIC package.
- What is the operating temperature range of the INA141U/2K5? The operating temperature range is –40°C to +85°C.
