10.4.4 C as Power Output
Values reflect a thermal fuse hold current limit. Circuit holds current at the maximum by
dropping the voltage when the load is too great. To reset, disconnect and allow circuit to cool.
Operating at the current limit is OK if some fluctuation can be tolerated. Drive capacity is
determined by the logic level of the Vdc supply and the output resistance (R
o
) of the terminal.
l C Terminals:
o
Output Resistance (R
o
): 150 Ω
o
5 V Logic Level Drive Capacity: 10 mA @ 3.5 Vdc; V
out
= 5 V - (I
out
× 150 Ω)
o
3.3 V Logic Level Drive Capacity: 10 mA @ 1.8 Vdc; V
out
= 3.3 V - (I
out
× 150 Ω)
10.4.5 CS I/O Pin 1
5 V Logic Level Max Current: 200 mA
10.5 Analogue measurements specifications
16 single-ended (SE) or 8 differential (DIFF) terminals individually configurable for voltage,
thermocouple, current loop, ratiometric, and period average measurements, using a 24-bit ADC.
One channel at a time is measured.
10.5.1 Voltage measurements
Terminals:
l Differential Configuration: DIFF 1H/1L – 8H/8L
l Single-Ended Configuration: SE1 – SE16
Input Resistance: 20 GΩ
Input 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: ±1 nA typical
Filter First Notch Frequency (f
N1
) Range: 0.5 Hz to 31.25 kHz (user specified)
10. Specifications 166
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