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Preamplifier SR551 ... from $750
SR551 High impedance preamplifier
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SR551 High Impedance Preamplifier
  • >1 TΩ input impedance
  • Gain of ×10
  • Single-ended and differential inputs
  • 1 MHz bandwidth
  • 12 nV/√Hz at 1 kHz voltage noise
  • Powered by SRS lock-in amplifiers
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 votage gain of ×10, amplifying signals from DC to 1 MHz..
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SR551 High Impedance Preamplifier

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 votage 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).

 

 

 

 

 

 

 

 

Phone: (408)744-9040 • Fax: (408)744-9049 • email: info@thinkSRS.comwww.thinkSRS.com

SR551 High Impedance Preamplifier
General
Input impedance >1 TΩ
Inputs Single-ended or differential
Input range -4 V to +4 V
Gain ×10
Gain accuracy ±0.5 % at 1 kHz
Gain stability ±25 ppm/°C (0°C to 40°C)
Bandwidth 1 MHz (-3 dB)
Input bias current <1 pA
Input voltage noise (typ.) 12 nV/√Hz at 1 kHz
Input current noise (typ.) 0.6 fA/√Hz at 1 kHz
CMRR >90 dB at 1 kHz
Input offset voltage <500 µV
Vos drift (typ) 3 µV/°C (0°C to 40°C)
Output 8 Vp (max), balanced differential, 10 mA (max), 50 Ω
Power Supplied by SRS Lock-Im Amplifier "Preamp Power" via control cable
Dimensions 3.0" × 1.3" × 5.1" (WHL)
Weight 1 lbs.
Temperature range 0°C to 40°C
Warranty One year parts and labor on defects in materials and workmanship
   
   
 
Phone: (408)744-9040 • Fax: (408)744-9049 • email: info@thinkSRS.comwww.thinkSRS.com