High-precision, single-channel, femtoampere input bias current electrometer amplifier RS8491

The RS8491 is a high-precision, single-channel, femtoampere input bias current electrometer amplifier with an operating voltage range of 5V to 25V, an offset voltage of 54uV, and an input bias current of only 200fA. The RS8491 also integrates a guard buffer to isolate the input pins from PCB leakage current. In addition, the high power supply rejection ratio and high common-mode rejection ratio improve the ability to resist power supply noise and common-mode interference, and the high open-loop gain of 130dB also ensures the high accuracy of the op amp. Low offset, low leakage, low voltage and current noise make RS8491 suitable for a variety of laboratory and analytical instruments, Trans-impedance amplifier, high impedance buffers, etc.