USB-2416-4AO User's Guide
Specifications
37
Analog voltage output
Unused VDACx output channels should be left disconnected.
The USB-2416-4AO output voltage level defaults to 0 V whenever the host PC is reset, shut down or
suspended, or if a reset command is issued to the device.
The duration of the output transient depends highly on the enumeration process of the host PC. Typically, the
output of the USB-2416-4AO is stable after two seconds.
Table 20. Analog voltage output specifications
Parameter
Conditions
Specifications
Digital-to-analog
converter
DAC8555
Number of channels
4
Resolution
16 bits
Output ranges
Calibrated
±10 V
Uncalibrated
±10.05 V, software configurable
Output transient
Host PC is reset, powered on, suspended or a reset
command is issued to device (refer to the output
transient discussion above)
Duration: 2 s
Amplitude: 2 V p-p
Initial power on
Duration: 50 ms
Amplitude: 5 V peak
Differential
non-linearity
±0.25 LSB typical
±1 LSB maximum
Output current
VDACx pins
±3.5 mA maximum
Output short-circuit
protection
VDACx connected to AGND
Unlimited duration
Output coupling
DC
VDACx readback
Each VDAC
x
output can be
independently measured by the onboard
A/D converter.
Software selectable
Power on and reset
state
DACs cleared to zero-scale: 0 V,
±50 mV
Output noise
30 µVrms
Settling time
To rated accuracy, 10 V step
45 µs
Slew rate
1.0 V/µs
Throughput
Single-channel
1000 S/s maximum, system-dependent
Multi-channel
1000 S/s
/
#ch maximum, system-
dependent
Table 21. Calibrated absolute accuracy specifications
Range
Accuracy (±LSB)
±10 V
16.0
Table 22. Calibrated absolute accuracy components specifications
Range
% of reading
Offset (±mV)
Temp drift (%/°C)
Absolute accuracy at FS (±mV)
±10 V
±0.0183
1.831
0.00055
3.661
Table 23. Relative accuracy specifications
Range
Relative accuracy (±LSB)
±10 V
4.0 typical
