Number of inputs4 FunctionInverting, non-inverting or off Gain1× Impedance1 MΩ BandwidthDC to 1 MHz Output noise60 nV/√Hz @ 1 kHz Crosstalk-80 dB @ 1 kHz Offset±100 µV (after 5 min. warm
up) Max. input & output±10 V Input slew rate40 V/µs THD0.01 % (80 dB) @ 1 kHz Output slew rate75 V/µs Operating temp.0 °C to 40 °C, non-condensing
Interface Serial via SIM interface ConnectorsBNC (5 front-panel, 1 rear-
DB15 (male) SIM interface PowerPower supplied by the SIM900
Mainframe, or optionally by a
user-supplied DC power supply
(±15 V and +5 V)
Dimensions1.5" × 3.6" × 7.0" (WHL) Weight1.5 lbs. Warranty One year parts and labor on
defects in materials and
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Four summing inputs
±10 V operating range
1 MHz bandwidth
Low crosstalk (-80 dB)
<100 µV input offset
High slew rate
The 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 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.