Measurement Specialties PCI-DAS64/M2/16 manual Crosstalk specifications

PCI-DAS64/M2/16 User's Guide Specifications

Typical accuracy is derived directly from the various component typical errors. The information in Table 4 assumes that each of the errors contributes in the same direction.

Table 5. Analog input — accuracy components specifications

Range	Gain error	Offset error	DLE	ILE
±5.000 V	±3.0 max, ±2.0 typ	±3.0 max, ±2.0 typ	±1.0 max, ±0.5 typ	±2 max, ±1.0 typ
±2.500 V	±3.0 max, ±2.0 typ	±5.0 max, ±4.0 typ	±1.0 max, ±0.5 typ	±2 max, ±1.0 typ
±1.250 V	±3.0 max, ±2.0 typ	±5.0 max, ±4.0 typ	±1.0 max, ±0.5 typ	±2 max, ±1.0 typ
±0.625 V	±5.0 max, ±4.0 typ	±5.0 max, ±4.0 typ	±1.0 max, ±0.5 typ	±2 max, ±1.0 typ
0 to + 5.000 V	±4.0 max, ±3.0 typ	±4.0 max, ±3.0 typ	±1.0 max, ±0.5 typ	±2 max, ±1.0 typ
0 to + 2.500 V	±6.0 max, ±5.0 typ	±5.0 max, ±4.0 typ	±1.0 max, ±0.5 typ	±2 max, ±1.0 typ
0 to + 1.250 V	±6.0 max, ±5.0 typ	±5.0 max, ±4.0 typ	±1.0 max, ±0.5 typ	±2 max, ±1.0 typ

As shown in Table 5, total board error is a combination of gain, offset, differential linearity error (DLE), and integral linearity error (ILE). The theoretical worst-case error of the board can be calculated by summing these component errors. Worst-case errors are realized only in the unlikely event that each of the component errors are at their maximum level, and causing error in the same direction.

Crosstalk

Crosstalk is defined here as the influence of one channel upon another when scanning two channels at the maximum rate. A full-scale 100 Hz triangle wave is input on channel 1, and channel 0 is tied to analog ground at the 100-pin user connector. Table 6 summarizes the influence of channel 1 on channel 0 with the effects of noise removed. The residue on channel 0 is described in LSBs.

Table 6. Crosstalk specifications

Range	Crosstalk (LSB pk-pk)	Per channel rate (kS/s)	ADC rate (kS/s)
±5.000 V	15	750	1500
±2.500 V	15	750	1500
±1.250 V	20	750	1500
±0.625 V	8	375	750
0 V to + 5.000 V	15	750	1500
0 V to + 2.500 V	20	750	1500
0 V to + 1.250 V	8	375	750
	Table 7. Analog input drift specifications
Analog input full-scale gain drift		+0.3 LSB/°C typical
Analog input zero drift		+2.1 LSB/°C typical
Overall analog input drift		±2.4 LSB/°C typical
Common mode range		±5 V
CMRR @ 60Hz		-90 dB
Input leakage current		2.3 nA
Input impedance		10 x 1011 Ω
Absolute maximum input voltage		±15 V
Warm-up time		60 minutes

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