Precision CMOS op amps offer low input leakage current and affordability

The ALD1730 series of precision CMOS operation amplifiers are offered in a standard 8-lead pinout. The family of op amps features 35-µV input offset voltage typical, 0.01-pA input bias current and low supply power to enhance accuracy for high-performance portable instruments. Individual members of this series target next generation precision voltage amplifiers, sensor interface circuits, charge integrators and other high performance portable analog circuits.

The op amp series provides the high precision input offset voltages typical of bi-polar op amps with the affordability of CMOS devices, which excel in very low input bias currents. The silicon gates of these devices are precision trimmed at the factory for low input offset voltages and low power requirements to remove loading effects on high source impedance signals such as capacitive sensors. The devices feature power dissipation of 0.9 mW and a unity gain bandwidth of 0.7 MHz. They offer 4-mW power dissipation and a frequency bandwidth of 1.5 MHz.