Stanford Research Systems SIM918 Overview

The SIM918 Current Preamplifier is ideal in applications in which the input offset voltage must be kept to a minimum. The DC voltage difference between the two inputs (current input and voltage bias) is accurately measured every 2 seconds, and is nulled. The result is a current amplifier with less than 5 V input offset voltage. This autozeroing feature can be engaged or inhibited remotely or from the front panel, giving you flexibility in sensitive applications. As a current amplifier, the SIM918 offers input noise as low as 15 fA/?Hz and adjustable current gain (106 to 108 V/A). The output voltage range is Tone10 V for all gain settings. Input bias current is less than 200 fA (DC), and the instrument has up to 10 kHz of (gain-dependent) bandwidth. There is a voltage bias input for setting the virtual ground potential to an external DC source. This input can range over Tone5 V. The bias voltage can be internally grounded. An autozero sync input/output connection is also provided.

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