Product Summary

The AD549KH is a monolithic electrometer operational amplifier with very low input bias current. Input offset voltage and input offset voltage drift are laser trimmed for precision performance. The AD549KH’s ultralow input current is achieved with “Topgate” JFET technology, a process development exclusive to Analog Device. This technology allows the fabrication of extremely low input current JFETs compatible with a standard junctionisolated bipolar process. The 1015 W common-mode impedance, a result of the bootstrapped input stage, insures that the input current is essentially independent of common-mode voltage. The applications of the AD549KH include electrometer amplifiers, photodiode preamp, pH electrode buffer, vacuum lon Gage measurement.

Parametrics

AD549KH absolute maximum ratings: (1)Supply Voltage: ±18 V; (2)Internal Power Dissipation: 500 mW; (3)Input Voltage: ±18 V; (4)Output Short Circuit Duration: Indefinite; (5)Differential Input Voltage: +VS and –VS; (6)Storage Temperature Range (H): -65℃ to +125℃; (7)Operating Temperature Range: 0℃ to +70℃; (8)Lead Temperature Range (Soldering 60 sec): +300℃.

Features

AD549KH features: (1)Input Bias Current Guaranteed Over Common-Mode Voltage Range; (2)Low Offset Voltage: 0.25 mV max; (3)Low Offset Drift: 5 mV/8C max; (4)Low Power: 700 mA max Supply Current; (5)Low Input Voltage Noise: 4 mV p-p 0.1 Hz to 10 Hz; (6)MIL-STD-883B Parts Available.

Diagrams

AD549KH block diagram

Image Part No Mfg Description Data Sheet Download Pricing
(USD)		 Quantity
AD549KHZ
AD549KHZ

IC OPAMP GP 1MHZ LP 20MA TO99-8
Data Sheet
0-1: $20.44
1-10: $19.11
10-100: $16.57
100-250: $15.47
250-500: $14.73
AD549KH
AD549KH

IC OPAMP GP 1MHZ LP 20MA TO99-8
Data Sheet
0-10: $22.04