Characterisation, Measurement & Analysis
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SRS SIM984 Isolation Amplifier

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  • SRS SIM984 Isolation Amplifier
  • SRS SIM984 Isolation Amplifier
  • SRS SIM984 Isolation Amplifier

SRS SIM984 Isolation amplifier

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Product Code: 43277
Manufacturer: Stanford Research Systems

  • 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.

Additional Information

SIM984 Specifications

Isolation voltage

±1000 V (max)

Leakage current

<2 µA at 1000 VDC

Isolation capacitance

1000 pF

IMRR

150 dB (DC)

Max. input

±10 V

Input Impedance

1 MΩ

Input noise (typ.)

15 nV/√Hz @ 1 kHz

Input offset drift

3 µV/°C (typ)

Output voltage range

±10 V

Output current

±20 mA (max)

Output resistance

50 Ω

Output offset

±0.1 V, adjustable

Output offset drift

1 mV/°C (typ.)

Output noise

80 µVrms (100 Hz bandwidth)
200 µVrms (10 kHz bandwidth)
1.5 mVrms (1 MHz bandwidth)

Gain

x1, x10, x100

Gain error

±0.5 %

THD

0.005 % (at 1 kHz, 600 Ω load)

Frequency range

DC to 100 Hz (Low BW)
DC to 10 kHz (Mediate BW)
DC to 1 MHz (High BW)

Rise time

300 ns (Vout = 4 V)

Slew rate

25 V/µs (Vout = 20 Vpp)

Interface

Serial via SIM interface

Connectors

Banana jacks (2 front-panel), BNC (1 front-panel), BNC (1 rear-panel)
DB15 (male) SIM interface

Power

Power supplied by the SIM900 Mainframe, or optionally by a user-supplied DC power supply (±15 V, +5 V, and +24V)

Dimensions

1.5" × 3.6" × 7.0" (WHL)

Weight

1.5 lbs.

Warranty

One year parts and labor on defects in materials and workmanship

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