SR551 - High Impedance Preamplifier

>1 TΩ input impedance Single-ended and differential inputs 12 nV/√Hz voltage noise at 1 kHz Powered by SRS lock-in amplifiers Single-ended/differential inputs 12 nV/√Hz noise (1 kHz) Powered by SRS lock-ins 3.6 nV/√Hz input noise FET input, 100 MΩ input impedance Gain of 1, 2, 5 or 10 High common mode rejection The SR551 High Impedance Preamplifier works with SRS lock-in amplifiers to measure voltages from sources with moderate to high source impedance. The preamplifier is designed for source impedances of up to gigaohms with little error from resistive loading, due to its exceptionally high 1 TΩ input impedance. The SR551 operates with a fixed voltage gain of ×10, amplifying signals from DC to 1 MHz. SR865A Lock-In Amplifier SR830 Lock-In Amplifier SR2124 Lock-In Amplifier SR860 Lock-In Amplifier SR865A Lock-In Amp. SR830 Lock-In Amp. SR2124 Lock-In Amp. SR860 Lock-In Amp. SR551 High Impedance Preamp The SR551 High Impedance Preamplifier works with SRS lock-in amplifiers to measure voltages from sources with moderate to high source impedance. The preamplifier is designed for source impedances of up to gigaohms with little error from resistive loading, due to its exceptionally high 1 TΩ input impedance. The SR551 operates with a fixed voltage gain of ×10, amplifying signals from DC to 1 MHz. Power and control signals are brought from an SRS lock-in amplifier by a 9-pin cable (included). The SR551 may also be operated independently by applying appropriate power supply voltages (±20 VDC). SR551 Specifications Single-ended or differential ±25 ppm/°C (0°C to 40°C) 12 nV/√Hz at 1 kHz (typ.) 0.6 fA/√Hz at 1 kHz (typ.) Input offset voltage 3 µV/°C (0°C to 40°C) 8 Vp (max), balanced differential, 10 mA (max), 50 Ω Supplied by SRS Lock-In Amplifier "Preamp Power" via control cable 3.0" × 1.3" × 5.1" (WHL) One year parts and labor on defects in materials and workmanship