SRS
SIM910 & SIM911 – JFET & BJT preamplifiers
Overview
The SIM910 and SIM911 are low-noise, programmable preamplifiers which are ideal for a wide range of small signal applications. The primary differences between the two models are their input impedance and input noise. The SIM911 has a bipolar junction transistor front-end, offers lower input noise, and has a 100 kΩ front-end impedance. The low bias current and 100 MΩ input impedance of the SIM910, which has a JFET front-end, make it a better choice for use with high impedance sources.
Feature
• 4 nV/√Hz input noise (SIM910)
• 1.8 nV/√Hz input noise (SIM911)
• Low output noise
• 1 MHz bandwidth
• Selectable gain from 1 to 100
• AC or DC coupled
• Differential or single-ended input
• 85 dB CMRR
• Remote interface
Technical Specifications
Frequency range: DC to 1 MHz
Gain: 1 to 100 (1-2-5 sequence)
Gain accuracy: ?0.5 % (DC to100 kHz), ?5 % (<1 MHz)
Gain stability: 200 ppm/?C
Input noise (typ.): 4 nV/?Hz @ 1 kHz (SIM910)
1.8 nV/?Hz @ 1 kHz (SIM911)
Input impedance: 100 M? // 35 pF (SIM910)
100 k? // 35 pF (SIM911)
Input bias current (DC coupled): 0.5 pA (typ.) (SIM910)
4 ?A (typ.) (SIM911)
AC coupling frequency (-3dB): 16 mHz (SIM910)
0.7 Hz (SIM911)
Input selection: A, A-B or GND
Input coupling: AC or DC
Input shields: Floating or ground
Maximum input: ?1 V differential, ?5 V common mode
Maximum output: ?10 V
Common mode rejection: 85 dB @ 1 kHz
Operating temperature: 0 ?C to 40 ?C, non-condensing
Interface: Serial via SIM interface
Connectors: BNC (3 front, 1 rear)
DB15 (male) SIM interface
Power: Power supplied by the SIM900 Mainframe, or optionally by a user-supplied DC power supply (?15 V and +5 V)
Dimensions: 1.5″” ? 3.6″” ? 7.0″” (WHL)
Weight: 1.5 lbs
Warranty: One year parts and labor on defects in materials and workmanship
Others
N/A
