Analogue Control Interface

FX839

© 1997 Consumer Microcircuits Limited

6

D/839/4

1.4

External Components

C1

22pF

±20%

R1

1M

:

±5%

X1

Note 1

C2

22pF

±20%

R2

22k

:

±10%

C3

0.1µF

±20%

C4

0.1µF

±20%

C5

0.1µF

±20%

Notes:

1.

If an external clock is to be used, it should be connected to Pin 2 and the components C1, C2,

R1 and X1 omitted. The ADC clock frequency is derived from the crystal or external clock by

means of internal programmable dividers. Refer to Section 1.7 for details of crystal or external

clock frequency range.

Figure 2: Recommended External Components