National Instruments 779647-30 PXI Source Measure Unit

The part number 779647-30 from National Instruments is the identifying part number for the PXI-4130 PXI Source Measure Unit. This sourcing unit has 1 SMU Channel with a voltage rating range of -20 V to +20 V and -6 V to +6 V. The Isolation voltage of this channel is 60 Volts DC, CAT I. The DC current source and sink rating of this module is 200 μA, 2 mA, 20 mA, 200 mA, 2 A. The SMU Channel has a voltage resolution of 0.33 mV when being used with voltages of -20 V to +20 V range and a voltage resolution of 0.1 mV with a voltage range between 0 to 6 Volts. 

The 779647-30 has a settling time of 500 μs, typical, meaning it takes the signal 500 μs to stabilize within a specified error margin of its final value. This module has an output capacitance of 10 nF at the low setting, and 6.8 μF at a high setting. The slew rate of this module is 0.08 V/μs meaning the rate of change of output with the change of the input is 0.08V/μs although a higher slew rate is always better because we want a stabilized output voltage. 

The module has 20 mV per amp of output load regulation using Local Sense, and current regulation of 0.01% of range per volt of output change. The Line voltage regulation of this device is 0.01 + 1 mV while the Line current regulation is 0.01 + 0.02% of the range. For the output of the module to update it takes 3000 Updates/s with a maximum measurement rate of 3 kS/s, nominal. The single point update latency for the 779647-30 is 600 µs which may cause delays in updating the output channels of this module. 

The module requires 10 Watts at 5 Volts or 1 Watt at 3.3 Volts 6 Watts at 12 Volts or 2.5 Watts at -12 Volts to operate. This module has a one-slot PXI/cPCI module design and has dimensions of 2.0 cm × 13.0 cm × 21.6 cm (0.8 in. × 5.1 in. × 8.5 in.). The 779647-30 weighs 312 g (11 oz).