Measurement Specialties PCI-DAS64/M2/16 manual System throughput, Accuracy

PCI-DAS64/M2/16 User's GuideSpecifications

System throughput

Table 2. System throughput specifications

Condition		Calibration coefficients	Max ADC
			rate
1.	Single channel, single input range.	Per specified range	2.0	MS/s
2.	Multiple-channel, single-input range: ±5 V,	Per specified range	1.5	MS/s
	±2.5 V, ±1.25 V, 0 to 5 V, 0 to 2.5 V
3.	Multiple channel, single input range: ±0.625 V, 0	Per specified range	750 kS/s
	to 1.25 V
4.	Single channel, multiple input ranges.	Default to value for cbAInScan() range	500 kS/s
5.	Multiple channels, multiple ranges. All samples in	Default to value for cbAInScan() range	500 kS/s
	unipolar or bipolar bode.
6.	Multiple channels, multiple ranges. All samples in	Default to value for cbAInScan() range	500 kS/s
	unipolar and/or bipolar bode.
7.	Multiple-channel, switching unipolar/bipolar	Default to value for cbAInScan() range	750 kS/s
	mode, single-input range.

Note 1: For conditions 1-3, specified accuracy is maintained at rated throughput. Conditions 4-7 apply calibration coefficients which correspond to the range value selected in cbAInScan(). These coefficients remain unchanged throughout the scan. Errors of up to 25 counts may be incurred when switching gains while in bipolar or unipolar mode only (conditions 4 and 5). Errors of up to 500 counts may be incurred when mixing unipolar/bipolar modes (conditions 6 and 7).

Accuracy

A 100 kS/s sampling rate, single-channel operation and a 60-minute warm-up. Accuracies are listed for operational temperatures within ±2ºC of internal calibration temperature. Calibrator test source high side tied to channel 0 and low side tied to low-level ground at the user connector

	Table 3. Analog input — absolute accuracy specifications
Range		Absolute accuracy
±5.000 V		±6.0 LSB
±2.500 V		±8.0 LSB
±1.250 V		±8.0 LSB
±0.625 V		±10.0 LSB
0 V to +5.000 V		±8.0 LSB
0 V to +2.500 V		±11.0 LSB
0 V to +1.250 V		±13.0 LSB
	Table 4. Analog input — typical accuracy specifications
Range		Typical accuracy
±5.000 V		±5.5 LSB
±2.500 V		±7.5 LSB
±1.250 V		±7.5 LSB
±0.625 V		±9.5 LSB
0 V to +5.000 V		±7.5 LSB
0 V to +2.500 V		±10.5 LSB
0 V to +1.250 V		±12.5 LSB

Each PCI-DAS64/M2/16 is tested at the factory to assure the board’s overall error does not exceed accuracy limits shown in Table 3.

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