Measurement Computing USB-202 - Manual (Page 15)

USB-202 User's Guide Specifications
15
Noise performance
For the peak to peak noise distribution test, the input channel is connected to AGND at the input terminal block,
and 12,000 samples are acquired at the maximum throughput.
Table 3. Noise performance specifications
Range Counts LSBrms
±10 V 5 0.76
Analog input calibration
Table 4. Analog input calibration specifications
Parameter Specification
Recommended warm-up time 15 minutes min
Calibration method Factory
Calibration interval 1 year
Analog output
Table 5. Analog output specifications
Parameter Condition Specification
Resolution 12 bits, 1 in 4,096
Output range 0 V to 5.0 V
Number of channels 2
Throughput (Note 1) Software paced 250 S/s single channel typ, PC dependent
Power on and reset voltage Initializes to 000h code 0 V, ±10 mV
Output drive Each D/A OUT 5 mA, sourcing
Slew rate 0.8 V/ µs typ
Note 1: Maximum throughput when scanning is machine dependent.
Table 6. Analog output accuracy, all values are (±); accuracy tested at no load
Range Accuracy (LSB)
0 V to 5.0 V 5.0 typ, 45.0 max
Table 7. Analog output accuracy components, all values are (±)
Range % of FSR Gain Error at FS (mV) Offset (mV)
(Note 2)
Accuracy at FS (mV)
0 V to 5.0 V 0.08 typ, 0.72 max 4.0 typ, 36.0 max 1.0 typ, 9.0 max 5.0 typ, 45.0 max
Note 2: Zero-scale offsets may result in a fixed zero-scale error producing a "dead-band” digital input code
region. In this case, changes in digital input code at values less than 0x040 may not produce a
corresponding change in the output voltage. The offset error is tested and specified at code 0x040.