Digi RCM4000 - Manual (Page 43)

User’s Manual 37
4.4.1 A/D Converter Power Supply
The analog section is isolated from digital noise generated by other components by way of a
low-pass filter composed of C1, L1, and C3 on the RCM4000 as shown in Figure 13. The
+V analog power supply powers the A/D converter chip.
Figure 13. Analog Supply Circuit
+V +3.3 V
C1
2.2 nF
C3
100 nF
L1