AD795JRZ

Instrumentation, Op Amps, Buffer Amps Overview

The AD795JRZ is a low noise, precision FET input operational amplifier manufactured by Analog Devices Inc. It features a maximum supply current of 1.5 mA and operates within a voltage range of ±4 V to ±18 V. The device offers a gain-bandwidth product of 1.6 MHz and a slew rate of 1 V/µs. Key electrical specifications include a maximum input offset voltage of 500 µV, an input bias current of 2 pA, and a common-mode rejection ratio of 110 dB. It is housed in an 8-lead SOIC package.

Instrumentation, Op Amps, Buffer Amps Feature Summary

• Combines the low voltage noise and offset drift characteristics of bipolar amplifiers with the extremely low input bias current typical of FET-input devices.
• Provides high DC accuracy through guaranteed tested maximum input voltage noise and low offset voltage drift across temperature variations.
• Features high common-mode impedance that ensures input bias current remains essentially independent of common-mode voltage and supply voltage fluctuations.

Instrumentation, Op Amps, Buffer Amps Applications

• Low noise photodiode preamplifiers
• CT scanners
• Precision current-to-voltage converters

Instrumentation, Op Amps, Buffer Amps Procurement Notes

Verify the specific suffix 'JRZ' corresponds to the commercial temperature range (0°C to +70°C) and tube packaging format as defined in the official Analog Devices ordering guide. Confirm RoHS compliance status for the specific manufacturing lot prior to integration into final assemblies.

Instrumentation, Op Amps, Buffer Amps Selection Notes

Select this component when circuit requirements demand both ultra-low input bias current and low voltage noise simultaneously. It serves as a direct replacement for older Burr-Brown OPA111 and OPA121 op amps where lower power consumption is required without sacrificing precision performance.

Instrumentation, Op Amps, Buffer Amps Part Context

The AD795 belongs to the Analog Devices precision amplifier family, specifically designed for applications requiring high input impedance. The 'J' designation indicates the commercial operating temperature range, while 'RZ' specifies the surface-mount SOIC package type.

Instrumentation, Op Amps, Buffer Amps Replacement Considerations

Officially documented as a low power replacement for the Burr-Brown OPA111 and OPA121 operational amplifiers.

Instrumentation, Op Amps, Buffer Amps FAQ

How does the AD795 handle input bias current stability?

The device utilizes a 10^14 Ω common-mode impedance, which ensures that the input bias current remains essentially independent of common-mode voltage and supply voltage variations.

What is the impact of temperature on input bias current?

Like other JFET input amplifiers, the input bias current of the AD795 doubles for every 10°C rise in junction temperature.