ADI AD549SH/883B

Общее назначение1 МГц

Overview

The AD549SH/883B 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 ultralow input current of the part is achieved with Topgate™ JFET technology, a process development exclusive to Analog Devices, Inc. This technology allows fabrication of extremely low input current JFETs compatible with a standard junction isolated bipolar process. The 1015 Ω common-mode impedance, which results from the bootstrapped input stage, ensures that the input current is essentially independent of the common-mode voltage.

The AD549SH/883B is available in a TO-99 hermetic package. The case is connected to Pin 8 so that the metal case can be independently connected to a point at the same potential as the input terminals, minimizing stray leakage to the case. The AD549SH/883B is available in four performance grades. The J, K, and L versions are rated over the commercial temperature range of 0°C to +70°C. The S grade is specified over the military temperature range of −55°C to +125°C and is available processed to MIL-STD-883B, Rev. C. Extended reliability plus screening is also available. Plus screening includes 168 hour burn-in, as well as other environmental and physical tests derived from MIL-STD-883B, Rev. C.

Features

Applications

• Proportional operation circuits
• Inverse/same-phase proportional circuit
• Addition operation circuits
• Subtraction operation circuits
• single/dual op amp sum and difference circuits
• Integrator circuits
• Differentiator circuits
• Logarithmic operation circuits
• Exponential operation circuits
• Multiplication circuits