Electronics Lab


Low Noise | High Resolution DAC (SP 927)

|The LNHR DAC is an eight channel voltage source with exceptional low noise performance and high resolution. It is designed to drive high-ohmic gates with ultra-stable voltages in fundamental physics experiments at cryogenic temperatures. For such experiments constant DC bias-voltages and high resolution sweep-voltages with very low fluctuations are mandatory. The output range of ±10 V, combined with the 24 bit resolution, allows adjusting the voltages with a step size of only 1.2 μV. The output voltage noise is below 1 μVRMS, measured in a frequency range of 0.1 Hz to 100 Hz. With its bandwidth of DC…70 Hz the LNHR DAC can be used for DC-biasing, for ramping/sweeping and for low frequency waveform generation. The device can be controlled locally by the rotary/push knob (encoder) or remotely by using the RS-232 interface. The actual voltages can be displayed on the LCD.

User Manual  

For fast switching between two output channels of the LNHR DAC use the Analog Selector Switch (SP 944). To generate precise voltages up to ±100 V use the HV-Amplifier (SP 908).