AD546*

DC PERFORMANCE 1 mV max Input Offset VoltageLow Offset Drift: 20V/8C1 pA max Input Bias CurrentInput Bias Current Guaranteed Over FullCommon-Mode Voltage RangeAC PERFORMANCE3 V/s Slew Rate1 MHz Unity Gain BandwidthLow Input Voltage Noise: 4V p-p, 0.1Hz to 10 HzAvailable in a Low Cost, 8-Pin Plastic Mini-DIPStandard Op Amp Pinout

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.

The AD546 is available in two performance grades, all ratedover the 0°C to +70°C commercial temperature range, andpackaged in an 8-pin plastic mini-DIP.