Overview
The INA122PAG4, produced by Texas Instruments, is a precision instrumentation amplifier designed for accurate, low-noise differential signal acquisition. This amplifier features a two-op-amp design, providing excellent performance with very low quiescent current of 60µA. It is suitable for portable instrumentation and data acquisition systems, and can be operated with single or dual power supplies ranging from 2.2V to 36V. The INA122PAG4 is available in 8-pin plastic DIP and SOIC surface-mount packages, both specified for the −40°C to +85°C temperature range.
Key Specifications
| Parameter | Value |
|---|---|
| Package | 8-pin PDIP, 8-pin SOIC |
| Operating Temperature Range | −40°C to +85°C |
| Power Supply Range | 2.2V to 36V |
| Quiescent Current | 60µA |
| Offset Voltage | 250µV maximum |
| Offset Voltage Drift | 3µV/°C maximum |
| Noise | 60nV/√Hz |
| Input Bias Current | 25nA maximum |
| Common-Mode Rejection Ratio (CMRR) | 76 to 96 dB |
| Differential Impedance | 100 GΩ || 3 pF |
| Common-Mode Impedance | 100 GΩ || 3 pF |
Key Features
- Low quiescent current: 60µA
- Wide power supply range: 2.2V to 36V
- Rail-to-rail output swing
- Low offset voltage: 250µV maximum
- Low offset drift: 3µV/°C maximum
- Low noise: 60nV/√Hz
- Low input bias current: 25nA maximum
- Single external resistor sets gain from 5V/V to 10000V/V
- Laser trimming for precise offset voltage and drift
Applications
- Portable electronics
- Field transmitters and sensors
- Pressure transmitters
- Infusion pumps
- Electrocardiograms (ECGs)
Q & A
- What is the INA122PAG4 used for? The INA122PAG4 is used for accurate, low-noise differential signal acquisition in various applications including portable electronics, field transmitters, and medical devices.
- What is the operating temperature range of the INA122PAG4? The operating temperature range is −40°C to +85°C.
- What are the package options for the INA122PAG4? The package options include 8-pin plastic DIP and 8-pin SOIC surface-mount packages.
- What is the power supply range for the INA122PAG4? The power supply range is from 2.2V to 36V.
- How is the gain set for the INA122PAG4? The gain is set by a single external resistor and can range from 5V/V to 10000V/V.
- What is the quiescent current of the INA122PAG4? The quiescent current is 60µA.
- What is the offset voltage of the INA122PAG4? The offset voltage is 250µV maximum.
- What is the common-mode rejection ratio (CMRR) of the INA122PAG4? The CMRR is 76 to 96 dB.
- What are some typical applications of the INA122PAG4? Typical applications include portable electronics, field transmitters and sensors, pressure transmitters, infusion pumps, and electrocardiograms (ECGs).
- How does the INA122PAG4 achieve low noise and offset? The INA122PAG4 achieves low noise and offset through laser trimming of internal resistors.
