SRS SIM980 Summing Amplifier
- Four summing inputs
- ±10 V operating range
- 1 MHz bandwidth
- Low crosstalk (−80 dB)
- <100 µV input offset
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The Stanford Research Systems SIM980 Summing Amplifier has four input channels that can be added or subtracted from each other. The output noise is less than 60 nV/√Hz, and crosstalk between channels is less than -80 dB. With a bandwidth of 1 MHz, a slew rate of 40 V/ms, and input offsets that are trimmed to ±100 µV, the SRS SIM980 is extremely useful in many analog applications.
The digital control circuitry in the SIM980 is designed with SRS’s special clock-stopping architecture in which the microcontroller is turned on only when switch settings are being changed. This guarantees that no digital noise contaminates low-level analog signals.
| Number of inputs | 4 |
| Function | Inverting, non-inverting or off |
| Gain | 1× |
| Impedance | 1 MΩ |
| Bandwidth | DC to 1 MHz |
| Output noise | 60 nV/√Hz @ 1 kHz |
| Crosstalk | −80 dB @ 1 kHz |
| Offset | ±100 µV (after 5 min. warm up) |
| Max. input & output | ±10 V |
| Input slew rate | 40 V/µs |
| THD | 0.01 % (80 dB) @ 1 kHz |
| Output slew rate | 75 V/µs |
| Operating temperature | 0 °C to 40 °C, non-condensing |
| Interface | Serial via SIM interface |
| Connectors | BNC (5 front-panel, 1 rear-panel) DB15 (male) SIM interface |
| Power (max.) | 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 | Two years parts and labour on defects in materials and workmanship |
Stanford Research Systems SIM980 datasheet 
