Overview
The INA821IDGKT is a high-precision instrumentation amplifier produced by Texas Instruments. This device is designed for low-power consumption and operates over a wide range of single-supply or dual-supply voltages. It features low offset voltage, low noise, and high bandwidth, making it suitable for various precision measurement applications. The INA821IDGKT is available in an 8-pin VSSOP package and is specified over a temperature range of –40°C to +125°C.
Key Specifications
| Parameter | Typical | Maximum | Unit |
|---|---|---|---|
| Input Stage Offset Voltage (VOSI) | 10 | 35 | µV |
| Output Stage Offset Voltage (VOSO) | 50 | 350 | µV |
| Offset Voltage Drift | 0.1 | 0.4 | µV/°C |
| Noise Voltage (eNI) | 7 | nV/√Hz | |
| Bandwidth (G = 1) | 4.7 | MHz | |
| Bandwidth (G = 100) | 290 | kHz | |
| Common-Mode Rejection Ratio (CMRR) | 112 | dB (G = 10) | |
| Power Supply Rejection Ratio (PSRR) | 110 | dB (G = 1) | |
| Supply Current (IQ) | 600 | 650 | µA |
| Supply Voltage Range (Single-Supply) | 4.5 | 36 | V |
| Supply Voltage Range (Dual-Supply) | ±2.25 | ±18 | V |
| Operating Temperature Range | –40 | +125 | °C |
Key Features
- Low offset voltage: 10 µV (typ), 35 µV (max)
- Low noise: 7 nV/√Hz
- High bandwidth: 4.7 MHz (G = 1), 290 kHz (G = 100)
- Stable with 1-nF capacitive loads
- Inputs protected up to ±40 V
- High common-mode rejection ratio: 112 dB (G = 10)
- High power supply rejection ratio: 110 dB (G = 1)
- Low power consumption: 650 µA (max) supply current
- Wide supply voltage range: Single-supply (4.5 V to 36 V), Dual-supply (±2.25 V to ±18 V)
- Available in 8-pin VSSOP package
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 stage offset voltage of the INA821IDGKT?
The typical input stage offset voltage is 10 µV.
- What is the maximum bandwidth of the INA821IDGKT at a gain of 1?
The maximum bandwidth at a gain of 1 is 4.7 MHz.
- What is the common-mode rejection ratio (CMRR) of the INA821IDGKT at a gain of 10?
The CMRR at a gain of 10 is 112 dB.
- What is the power supply rejection ratio (PSRR) of the INA821IDGKT at a gain of 1?
The PSRR at a gain of 1 is 110 dB.
- What is the maximum supply current of the INA821IDGKT?
The maximum supply current is 650 µA.
- What is the operating temperature range of the INA821IDGKT?
The operating temperature range is –40°C to +125°C.
- What types of packages are available for the INA821IDGKT?
The INA821IDGKT is available in an 8-pin VSSOP package.
- What is the input overvoltage protection of the INA821IDGKT?
The inputs are protected up to ±40 V.
- Can the INA821IDGKT handle capacitive loads?
Yes, it is stable with 1-nF capacitive loads.
- What are some common applications of the INA821IDGKT?
Common applications include analog input modules, flow transmitters, battery testing, LCD testing, ECG equipment, surgical equipment, and process analytics.
