Overview
The INA819IDRGT is a high-precision instrumentation amplifier produced by Texas Instruments. This device is designed to offer low power consumption and operates over a wide single-supply or dual-supply range. It features exceptionally low input offset voltage, offset voltage drift, and input bias current, making it suitable for a variety of precision measurement applications. The INA819IDRGT is available in an 8-pin WSON package and is specified over the –40°C to +125°C temperature range.
Key Specifications
| Parameter | Min | Typ | Max | Unit |
|---|---|---|---|---|
| Input Stage Offset Voltage (VOSI) | 10 | - | 35 | µV |
| Offset Voltage Drift | - | - | 0.4 | µV/°C |
| 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 | - | - | 385 µA | - |
| Supply Range | - | - | Single supply: 4.5 V to 36 V, Dual supply: ±2.25 V to ±18 V | - |
| Operating Temperature Range | -40 | - | 125 | °C |
Key Features
- Low offset voltage: 10 µV (typ), 35 µV (max)
- Low gain drift: 5 ppm/°C (G = 1), 35 ppm/°C (G > 1)
- Low noise: 8 nV/√Hz
- High bandwidth: 2 MHz (G = 1), 270 kHz (G = 100)
- High common-mode rejection ratio: 90 dB (min) at G = 1
- High power supply rejection ratio: 110 dB (min) at G = 1
- Input protection up to ±60 V
- Stable with 1-nF capacitive loads
- Single external resistor sets any gain from 1 to 10,000
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 INA819IDRGT?
The typical input offset voltage is 10 µV, with a maximum of 35 µV.
- What is the gain drift of the INA819IDRGT?
The gain drift is 5 ppm/°C for G = 1 and 35 ppm/°C for G > 1.
- What is the noise performance of the INA819IDRGT?
The device has a noise of 8 nV/√Hz.
- What is the bandwidth of the INA819IDRGT?
The bandwidth is 2 MHz for G = 1 and 270 kHz for G = 100.
- What is the common-mode rejection ratio (CMRR) of the INA819IDRGT?
The CMRR exceeds 90 dB at G = 1.
- How is the gain of the INA819IDRGT set?
The gain is set by a single external resistor connected between pins 2 and 3, using the equation G = 1 + 50 kΩ / RG.
- What is the supply voltage range for the INA819IDRGT?
The device operates on a single supply from 4.5 V to 36 V or a dual supply from ±2.25 V to ±18 V.
- What is the operating temperature range of the INA819IDRGT?
The operating temperature range is –40°C to +125°C.
- What kind of input protection does the INA819IDRGT offer?
The inputs are protected up to ±60 V.
- In what packages is the INA819IDRGT available?
The device is available in 8-pin SOIC, VSSOP, and WSON packages.
