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http://www.ti.com/general/docs/suppproductinfo.tsp?distId=26&gotoUrl=https%3A%2F%2Fwww.ti.com%2Flit%2Fgpn%2Fopa4323″>View Datasheet
Texas Instruments OPAx323 Zero-Cross Operational Amplifiers (Op Amps) are single (OPA323), dual (OPA2323), and quad-channel (OPA4323), low-voltage (1.7V to 5.5V), high-bandwidth (20MHz) op amps with a zero-crossover input stage and a rail-to-rail output stage. The zero-crossover input stage enables OPAx323 to achieve high linearity and low distortion for input signals with rail-to-rail swing typical in ADC driver applications. The gain bandwidth of 20MHz provides a fast settling response for ADC sampling speeds between 0.5MSPS and 5MSPS, depending on the settling performance required. OPAx323 is well-optimized for power savings as it consumes just 1.6mA of typical quiescent current.
OPAx323 easily supports precision performance in high gain voltage sensing applications such as the Wheatsone bridge, as it features a maximum offset drift of 2µV/°C and thermal noise floor of 5.5nV/√Hz with a minimum of 100dB CMRR. This unique combination of higher precision (low offset, drift, noise, distortion, and CMRR) and higher gain-bandwidth (fast settling and slewing) enables use in multiple applications such as motor rotary encoders, microphone audio pre-amplifiers, and ultrasonic transducers.
Texas Instruments OPAx323 achieves a high slew rate of 33V/µs, allowing for fast detection of faults in motor current sensing applications. Unlike traditional amplifiers, the zero-cross-over input stage allows for identical precision performance for both low and high-side sensing applications, thus making OPAx323 an excellent choice for current sensing in a variety of end equipment such as solar string inverters, power delivery, grid, and EV infrastructure. OPAx323S devices provide shutdown functionality for additional power savings and help disable the amplifier when idle. The family features standard, small sizes, leaded, and QFN packages across all the channel variants.
