Overview
The INA818IDR from Texas Instruments is a high-precision instrumentation amplifier designed for low power consumption and wide supply voltage range. It features exceptionally low input offset voltage, offset voltage drift, and noise, making it suitable for a variety of precision measurement applications. The device operates with a single external resistor to set any gain from 1 to 10000 and is optimized for high common-mode rejection ratio. It is available in an 8-pin SOIC package and is specified over the –40°C to +125°C temperature range.
Key Specifications
| Parameter | Description |
|---|---|
| Offset Voltage | 10 µV (typ), 35 µV (max) |
| Gain Drift | 5 ppm/°C (G = 1), 35 ppm/°C (G > 1) (max) |
| Noise | 8 nV/√Hz |
| Bandwidth | 2 MHz (G = 1), 270 kHz (G = 100) |
| Input Protection | Up to ±60 V |
| Common-Mode Rejection Ratio | 110 dB, G = 10 (min) |
| Power-Supply Rejection Ratio | 100 dB, G = 1 (min) |
| Supply Current | 385 µA (max) |
| Supply Voltage Range | Single supply: 4.5 V to 36 V, Dual supply: ±2.25 V to ±18 V |
| Operating Temperature Range | –40°C to +125°C |
| Package | 8-pin SOIC |
Key Features
- Low offset voltage: 10 µV (typ), 35 µV (max)
- Low gain drift: 5 ppm/°C (G = 1), 35 ppm/°C (G > 1) (max)
- Low noise: 8 nV/√Hz
- High bandwidth: 2 MHz (G = 1), 270 kHz (G = 100)
- Stable with 1-nF capacitive loads
- Inputs protected up to ±60 V
- High common-mode rejection ratio: 110 dB, G = 10 (min)
- High power-supply rejection ratio: 100 dB, G = 1 (min)
- Low power consumption: 385 µA (max) supply current
- Wide supply voltage range: Single supply: 4.5 V to 36 V, Dual supply: ±2.25 V to ±18 V
Applications
- Industrial monitors
- Flow transmitters
- Battery test equipment
- Multiparameter patient monitors
- Analog input modules
- Semiconductor test equipment
- Portable instrumentation
Q & A
- What is the typical offset voltage of the INA818IDR?
The typical offset voltage of the INA818IDR is 10 µV.
- What is the maximum gain drift for the INA818IDR?
The maximum gain drift for the INA818IDR is 5 ppm/°C (G = 1) and 35 ppm/°C (G > 1).
- What is the noise level of the INA818IDR?
The noise level of the INA818IDR is 8 nV/√Hz.
- What is the bandwidth of the INA818IDR at different gains?
The bandwidth of the INA818IDR is 2 MHz at G = 1 and 270 kHz at G = 100.
- How are the inputs of the INA818IDR protected?
The inputs of the INA818IDR are protected up to ±60 V.
- What is the common-mode rejection ratio of the INA818IDR?
The common-mode rejection ratio of the INA818IDR is 110 dB at G = 10 (min).
- What is the power-supply rejection ratio of the INA818IDR?
The power-supply rejection ratio of the INA818IDR is 100 dB at G = 1 (min).
- What is the maximum supply current of the INA818IDR?
The maximum supply current of the INA818IDR is 385 µA.
- What is the operating temperature range of the INA818IDR?
The operating temperature range of the INA818IDR is –40°C to +125°C.
- In what package is the INA818IDR available?
The INA818IDR is available in an 8-pin SOIC package.
