Range: ±2.5 mA
Resolution: 0.6 µA
Current Excitation Absolute Accuracy (note that ratiometric accuracy, rather than the absolute
accuracy or excitation or analog measurement, determines the accuracy of ratiometric-resistance
measurements):
l 0 to 40 °C: ±(0.11% of setting + 2.0 μA)
l –40 to 70 °C: ±(0.12% of setting + 2.5 μA)
l –55 to 85 °C (XT): ±(0.13% of setting + 3.0 μA)
Compliance Voltage: ±5 V
11.5 Analog measurements specifications
12 universal (U) terminals individually configurable for voltage, thermocouple, thermistor, current
loop, ratiometric, static vibrating wire, and period average measurements, using a 24-bit ADC.
One channel at a time is measured.
11.5.1 Voltage measurements
Terminals:
l Differential Configuration (H/L): U1/U2- U11/U12
l Single-Ended Configuration: U1 – U12
Input Resistance: 20 GΩ typical
Input Voltage Limits: ±5 V
Sustained Input Voltage without Damage: ±20 VDC
DC Common Mode Rejection:
l > 120 dB with input reversal
l ≥ 86 dB without input reversal
Normal Mode Rejection: > 70 dB @ 60 Hz
Input Current @ 25 °C: ±2 nA typical
Filter First Notch Frequency (f
N1
) Range: 5 Hz to 93 kHz (user specified)
11. CR6 Specifications 216
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