PCI-DAS1602/16 User's Guide
Specifications
21
Accuracy
Table 2. Analog input accuracy specifications
Range
Accuracy
BIP10
±16 LSB
BIP5
±6 LSB
BIP2.5
±16 LSB
BIP1.25
±16 LSB
UNI10
±8 LSB
UNI5
±28 LSB
UNI2.5
±28 LSB
UNI1.25
±28 LSB
Accuracy Components
Gain error
Trimmable by potentiometer to 0
Offset error
Trimmable by potentiometer to 0
PGA linearity error
±1.3 LSB typ , ±10.0 LSB max
Integral linearity error
±0.5 LSB typ , ±3.0 LSB max
Differential linearity error
±0.5 LSB typ, ±2.0 LSB max
Total board error is a combination of gain, offset, differential linearity and integral linearity error. The
theoretical absolute accuracy of the board may be calculated by summing these component errors. Worst case
error is realized only in the unlikely event that each of the component errors is at their maximum level, and
causing error in the same direction.
Analog input drift
Table 3. Analog input drift specifications
Range
Analog input full-scale
gain drift
Analog input zero drift
Overall analog input drift
± 10.00 V
2.2 LSB/°C max
1.8 LSB/°C max
4.0 LSB/°C max
± 5.000 V
2.2 LSB/°C max
1.9 LSB/°C max
4.1 LSB/°C max
± 2.500 V
2.2 LSB/°C max
2.0 LSB/°C max
4.2 LSB/°C max
± 1.250 V
2.2 LSB/°C max
2.3 LSB/°C max
4.5 LSB/°C max
0 - 10.00 V
4.1 LSB/°C max
1.9 LSB/°C max
6.0 LSB/°C max
0 - 5.000 V
4.1 LSB/°C max
2.1 LSB/°C max
6.2 LSB/°C max
0 - 2.500 V
4.1 LSB/°C max
2.4 LSB/°C max
6.5 LSB/°C max
0 - 1.250 V
4.1 LSB/°C max
3.0 LSB/°C max
7.1 LSB/°C max
Absolute error change per °C temperature change is a combination of the Gain and Offset drift of many
components. The theoretical worst case error of the board may be calculated by summing these component
errors. Worst case error is realized only in the unlikely event that each of the component errors is at their
maximum level, and causing error in the same direction.
