SRS SIM984 Isolation Amplifier
- Isolation voltage up to ±1000 V
- 1 MHz bandwidth
- 15 nV/√Hz input noise
- 1 MΩ input impedance
- Gain of x1, x10 or x100
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The SRS SIM984 is a wide bandwidth, low noise isolation amplifier. It has a gain of up to x100 and a bandwidth up to 1 MHz. The input stage is floating and is optically coupled to the output stage which is chassis grounded. The input signal can float up to 1000 V above or below ground. DC output offset can be adjusted from the front panel with a small screwdriver. In addition to measuring isolated signals, the SIM984 can also be used to break ground loops and reduce common-mode interference.
The SIM984 is a wide bandwidth, low noise isolation amplifier. It has a gain of up to x100 and a bandwidth up to 1 MHz. The input stage is floating and is optically coupled to the output stage which is chassis grounded. The input signal can float up to 1000 V above or below ground. DC output offset can be adjusted from the front panel with a small screwdriver. In addition to measuring isolated signals, the SIM984 can also be used to break ground loops and reduce common-mode interference.
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SIM984 Specifications |
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Isolation voltage |
±1000 V (max) |
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Leakage current |
<2 µA at 1000 VDC |
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Isolation capacitance |
1000 pF |
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IMRR |
150 dB (DC) |
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Max. input |
±10 V |
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Input Impedance |
1 MΩ |
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Input noise (typ.) |
15 nV/√Hz @ 1 kHz |
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Input offset drift |
3 µV/°C (typ) |
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Output voltage range |
±10 V |
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Output current |
±20 mA (max) |
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Output resistance |
50 Ω |
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Output offset |
±0.1 V, adjustable |
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Output offset drift |
1 mV/°C (typ.) |
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Output noise |
80 µVrms (100 Hz bandwidth) |
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Gain |
x1, x10, x100 |
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Gain error |
±0.5 % |
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THD |
0.005 % (at 1 kHz, 600 Ω load) |
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Frequency range |
DC to 100 Hz (Low BW) |
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Rise time |
300 ns (Vout = 4 V) |
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Slew rate |
25 V/µs (Vout = 20 Vpp) |
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Interface |
Serial via SIM interface |
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Connectors |
Banana jacks (2 front-panel), BNC (1 front-panel), BNC (1 rear-panel) |
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Power |
Power supplied by the SIM900 Mainframe, or optionally by a user-supplied DC power supply (±15 V, +5 V, and +24V) |
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Dimensions |
1.5" × 3.6" × 7.0" (WHL) |
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Weight |
1.5 lbs. |
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Warranty |
One year parts and labor on defects in materials and workmanship |
Stanford Research Systems SIM984A datasheet
Stanford Research Systems SIM984A user manual
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