Overview
The INA819IDR is a high-precision instrumentation amplifier produced by Texas Instruments. It is designed to offer low power consumption and operates over a wide range of single-supply or dual-supply voltages. The device features exceptionally low input offset voltage, offset voltage drift, and noise, making it suitable for a variety of precision measurement applications. The INA819IDR is available in 8-pin SOIC, VSSOP, and WSON packages and is specified over a temperature range of –40°C to +125°C.
Key Specifications
| Parameter | Min | Typ | Max | Unit |
|---|---|---|---|---|
| Input Offset Voltage (VOSI) | 10 | - | 35 | µV |
| Gain Drift | - | - | 5 ppm/°C (G = 1), 35 ppm/°C (G > 1) | - |
| Noise (eNI) | - | - | 8 nV/√Hz | - |
| Bandwidth | - | - | 2 MHz (G = 1), 270 kHz (G = 100) | - |
| Common-Mode Rejection Ratio (CMRR) | 90 | - | - | dB |
| Power Supply Rejection Ratio (PSRR) | 110 | - | - | dB |
| Supply Current (IQ) | - | - | 385 µA | - |
| Supply Range | - | - | Single: 4.5 V to 36 V, Dual: ±2.25 V to ±18 V | - |
| Operating Temperature Range | -40 | - | 125 | °C |
Key Features
- Low offset voltage: 10 µV (typ), 35 µV (max)
- Low noise: 8 nV/√Hz
- High common-mode rejection ratio: up to 110 dB
- High power supply rejection ratio: up to 110 dB
- Wide supply range: Single supply from 4.5 V to 36 V, dual supply from ±2.25 V to ±18 V
- Input protection up to ±60 V
- Stable with 1-nF capacitive loads
- Low quiescent current: 385 µA (max)
Applications
- Analog input modules
- Flow transmitters
- Battery testing
- LCD testing
- Electrocardiogram (ECG) equipment
- Surgical equipment
- Process analytics (pH, gas, concentration, force, and humidity)
Q & A
- What is the typical input offset voltage of the INA819IDR?
The typical input offset voltage is 10 µV, with a maximum of 35 µV. - What is the noise performance of the INA819IDR?
The INA819IDR has a noise performance of 8 nV/√Hz. - What is the common-mode rejection ratio (CMRR) of the INA819IDR?
The CMRR exceeds 90 dB across the full input common-mode range. - What is the power supply rejection ratio (PSRR) of the INA819IDR?
The PSRR is up to 110 dB. - What is the operating temperature range of the INA819IDR?
The operating temperature range is from –40°C to +125°C. - What are the package options for the INA819IDR?
The device is available in 8-pin SOIC, VSSOP, and WSON packages. - How is the gain of the INA819IDR set?
The gain is set by a single external resistor (RG) between pins 2 and 3. - What is the maximum supply current of the INA819IDR?
The maximum supply current is 385 µA. - What are some typical applications of the INA819IDR?
Typical applications include analog input modules, flow transmitters, battery testing, LCD testing, ECG equipment, surgical equipment, and process analytics. - Is the INA819IDR protected against overvoltage?
Yes, the inputs are protected up to ±60 V.
