AD546*

The AD546 is a monolithic electrometer combining the virtuesof low (1 pA) input bias current with the cost effectiveness of aplastic mini-DIP package. Both input offset voltage and inputoffset voltage drift are laser trimmed, providing very highperformancefor such a low cost amplifier.

Input bias currents are reduced significantly by using "topgate"JFET technology. The 1015 W common-mode impedance,resulting from a bootstrapped input stage, insures that inputbias current is essentially independent of common-mode voltagevariations.

The AD546 is suitable for applications requiring both minimallevels of input bias current and low input offset voltage.Applicationsfor the AD546 include use as a buffer amplifier for currentoutput transducers such as photodiodes and pH probes. Itmay also be used as a precision integrator or as a low droop ratesample and hold amplifier. The AD546 is pin compatible withstandard op amps; its plastic mini-DIP package is ideal for usewith automatic insertion equipment.