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The OPA2322AIDGKR is a dual-channel, low-noise, precision CMOS operational amplifier from Texas Instruments, designed for applications requiring low power consumption, high impedance, and rail-to-rail input/output operation . Operating from a single supply voltage as low as 1.8V up to 5.5V, this device delivers 20MHz bandwidth with excellent AC performance while consuming only 1.5mA per channel . With its ultra-low 0.2pA input bias current, 500µV input offset voltage, and rail-to-rail input/output capability, it is ideally suited for sensor interfaces, portable instrumentation, active filtering, and data acquisition systems requiring precision signal conditioning in space-constrained designs .
Category:Integrated Circuits (ICs);Linear;Amplifiers;Instrumentation, Op Amps, Buffer Amps
Mfr:Texas Instruments
Packaging:Tape & Reel (TR);Cut Tape (CT)
Part Status:Active
Amplifier Type:CMOS
Number of Circuits:2
Output Type:Rail-to-Rail
Voltage - Input Offset:500 µV
Current - Supply:1.6mA (x2 Channels)
Current - Output / Channel:65 mA
Voltage - Supply Span (Min):1.8 V
Voltage - Supply Span (Max):5.5 V
Operating Temperature:-40°C ~ 125°C
Mounting Type:Surface Mount
Package / Case:8-TSSOP, 8-MSOP (0.118", 3.00mm Width)
Supplier Device Package:8-VSSOP
Base Product Number:OPA2322
High Gain Bandwidth: 20 MHz gain bandwidth product and 10 V/µs slew rate ensure accurate amplification of high-frequency signals and fast transient response in demanding applications .
Ultra-Low Input Bias Current: 0.2 pA typical input bias current enables interfacing with high-impedance sources such as photodiodes, piezoelectric sensors, and chemical electrodes without significant loading errors .
Low Noise Performance: 8.5 nV/√Hz input voltage noise density at 5.5V ensures clean signal amplification in sensitive measurement and audio applications .
Rail-to-Rail Input/Output: Input and output stages swing within millivolts of both supply rails, maximizing dynamic range in low-voltage single-supply applications .
Low Offset Voltage: 500 µV maximum input offset voltage provides excellent DC accuracy for precision applications without requiring external calibration .
High Output Drive: Delivers up to 65 mA output current per channel, suitable for driving capacitive loads, analog-to-digital converters, and audio lines .
Wide Supply Range: Operates from 1.8V to 5.5V on a single supply, compatible with lithium-ion battery operation and standard 3.3V/5V systems .
Extended Temperature Range: -40°C to 125°C operation ensures reliable performance in industrial and automotive environments .
Auto-Calibration: Features internal auto-calibration circuitry that minimizes offset voltage drift over temperature and time .
Sensor Signal Conditioning: Amplifies and filters signals from photodiodes, thermocouples, RTDs, strain gauges, and electrochemical sensors in industrial, medical, and scientific instrumentation, leveraging ultra-low input bias current for minimal loading error .
Portable and Battery-Powered Equipment: Used in handheld multimeters, data loggers, wireless sensors, and portable medical devices where low-voltage operation and power efficiency are critical for extended battery life .
Active Filters: Implements low-power Sallen-Key filters, multiple feedback filters, and integrators in data acquisition systems, anti-aliasing filters, and audio processing chains requiring precision frequency response .
Transimpedance Amplifiers: Provides current-to-voltage conversion for photodetectors, optical sensors, and spectrophotometry equipment, with ultra-low bias current preserving signal accuracy from high-impedance sources .
Data Acquisition Systems: Serves as buffer amplifiers, ADC drivers, and signal conditioning elements in multichannel data loggers, industrial monitoring systems, and precision measurement equipment .
Audio Processing: Used in microphone preamplifiers, portable audio players, and active crossover networks requiring low noise, wide bandwidth, and rail-to-rail output swing .
Industrial Control: Provides signal conditioning for pressure, temperature, and position sensors in PLCs, process controllers, and factory automation equipment requiring reliable performance in harsh environments .
Medical Electronics: Amplifies biopotential signals in ECG, EEG, and patient monitoring systems, where low noise and high input impedance are essential for signal integrity .
The Texas Instruments OPA2322AIDGKR is a high-performance, dual-channel CMOS operational amplifier that combines 20 MHz bandwidth, 10 V/µs slew rate, ultra-low 0.2 pA input bias current, and rail-to-rail input/output capability in a compact 8-pin VSSOP package . Its excellent speed-power ratio, precision DC characteristics, and wide temperature range make it an ideal choice for sensor interfaces, portable instrumentation, active filters, and medical devices requiring low power consumption, high impedance interfacing, and reliable performance in space-constrained industrial and automotive applications .
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