Model 7280 Wide-bandwidth DSP Lock-in amplifier

Model 7280 Wide-bandwidth DSP Lock-in amplifier

The model 7280 DSP Lock-in Amplifier is an exceptionally versatile instrument with outstanding performance.

With direct digital demodulation over an operating frequency extending up to 2.0 MHz, output filter time constants down to 1 ms and a main ADC sampling rate of 7.5 MHz it is ideal for recovering fast changing signals. But unlike some other high frequency lock-ins, it also works in the traditional audio frequency band. The instrument includes the extended operating modes like dual reference, dual harmonic and virtual reference made popular by the 7260 and 7265, as well as the spectral display mode used to aid reference frequency selection. If you need a lock-in capable of working beyond the traditional audio frequency band but still want the drift-free performance that only digital demodulation brings, the 7280 is an ideal choice.


  • 0.5 Hz to 2 MHz operation
  • Voltage and current mode inputs
  • Direct digital demodulation without downconversion
  • 7.5 MHz main ADC sampling rate
  • 1us to 100ks output time constants
  • Dual-reference and dual-harmonic operating modes



This product could be used for the following applications:

  • Scanned probe measurements
  • Audio studies
  • Optical measurements
  • AC impedance studies
  • Atomic force microscopy


This product is manufactured by SIGNAL RECOVERY.

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