Shown here are precision operational amplifiers that provide PLC I/O module designers the benefits of signal linearity, high input dynamic range, accuracy, noise immunity and low power. The OPA365 uses a zero crossover topology to provide excellent total harmonic distortion, 100 dBCMRR, rail to rail I/O and very low noise (4.5 nv/sq.rt. Hz). The INA333 is a zero drift instrumentation amplifier. It needs a max supply current of 75 µA and incorporates input EMI filters. The DAC87x8 family of bipolar D/A converters provides a wide output range of +/-15.5 V with a fast 10 µS settling time, good INL and low glitch energy. In addition 12/14/16 bit options are available. Finally, TI’s E2E community, an engineer to engineer based forum, is an excellent support resource. Please visit through www.ti.com.