The CSM1321 (single), CSM1358 (dual) and CSM1324 (quad) are low cost, rail to rail input and output voltage feedback amplifiers. They have a wide input common-mode voltage range and output voltage swing, and take the minimum operating supply voltage down to 2.1V. The maximum recommended supply voltage is 5.5V. All are specified over the extended -40°C to +125°C temperature range.

The CSM1321/1358/1324 provide 1.2MHz bandwidth at a low current consumption of 60μA per amplifier. Very low input bias current of 0.5pA enable CSM1321/1358/1324 to be used for integrators, photodiode amplifiers, and piezoelectric sensors. Rail to rail input and output are useful to designers for buffering ASIC in single-supply systems.

Applications for these amplifiers include safety monitoring, portable equipment, battery and power supply control, and signal conditioning and interfacing for transducers in very low power systems.

The CSM1321 single is available in the Green SOT23-5 and SOIC-8 packages. The CSM1358 dual comes in the Green SOIC-8, MSOP-8 and TSSOP-8 packages. The quad CSM1324 is offered in Green TSSOP-14 and SOIC-14 packages.