Overview
The INA823DR, produced by Texas Instruments, is an integrated instrumentation amplifier designed for low power consumption and wide supply range operation. It is suitable for a variety of applications requiring precision and low noise. The device operates on a single supply from 2.7 V to 36 V or dual supplies from ±1.35 V to ±18 V, making it versatile for different system requirements. The INA823DR is optimized for high common-mode rejection ratio and low input offset voltage, making it ideal for precision measurement and signal conditioning tasks.
Key Specifications
| Parameter | Typical | Minimum | Maximum | Unit |
|---|---|---|---|---|
| Supply Voltage (Single Supply) | 2.7 to 36 | 2.7 | 36 | V |
| Supply Voltage (Dual Supply) | ±1.35 to ±18 | ±1.35 | ±18 | V |
| Input Offset Voltage | 20 | - | 100 | µV |
| Input Bias Current | - | - | 8 | nA |
| Common-Mode Rejection Ratio (G = 1) | - | 84 | - | dB |
| Power Supply Rejection Ratio (G = 1) | - | 100 | - | dB |
| Bandwidth (G = 1) | 1.9 | - | - | MHz |
| Quiescent Current | 180 | - | 250 | µA |
| Operating Temperature Range | - | -40 | 125 | °C |
| Package Types | - | - | 8-pin SOIC, 8-pin VSSOP | - |
Key Features
- Input overvoltage protection up to ±60 V
- Low power supply current: 180 µA (typical)
- Precision performance: low offset voltage, low input bias current, and high common-mode rejection ratio
- Wide supply range: single supply from 2.7 V to 36 V, dual supplies from ±1.35 V to ±18 V
- Gain adjustable from 1 to 10,000 using an external resistor
- Stable with 1-nF capacitive loads
- Low noise: 21 nV/√Hz input voltage noise
Applications
- Flow transmitters
- Wearable fitness and activity monitors
- Infusion pumps
- Blood glucose monitors
- Electrocardiograms (ECG)
- Surgical equipment
- Weigh scales
- Analog input modules
- Process analytics (pH, gas, concentration, force, and humidity)
- Battery testing
Q & A
- What is the supply voltage range for the INA823DR?
The INA823DR operates on a single supply from 2.7 V to 36 V or dual supplies from ±1.35 V to ±18 V. - What is the typical input offset voltage of the INA823DR?
The typical input offset voltage is 20 µV. - What is the common-mode rejection ratio (CMRR) of the INA823DR at a gain of 1?
The CMRR at a gain of 1 is at least 84 dB. - How is the gain of the INA823DR adjusted?
The gain is adjusted using an external resistor (RG) connected between pins 1 and 8, with the gain equation being G = 1 + (100 kΩ / RG). - What is the quiescent current of the INA823DR?
The typical quiescent current is 180 µA. - What are the package types available for the INA823DR?
The device is available in 8-pin SOIC and 8-pin VSSOP packages. - What is the operating temperature range of the INA823DR?
The operating temperature range is from -40°C to +125°C. - Does the INA823DR have input overvoltage protection?
Yes, it has input overvoltage protection up to ±60 V. - What is the bandwidth of the INA823DR at a gain of 1?
The bandwidth at a gain of 1 is 1.9 MHz. - What are some common applications of the INA823DR?
Common applications include flow transmitters, wearable fitness monitors, infusion pumps, blood glucose monitors, ECGs, surgical equipment, weigh scales, analog input modules, and process analytics.
