ADE7752/ADE7752A

Rev. C | Page 7 of 24

Pin No.

Mnemonic

Description

19

CLKIN

Master Clock for ADCs and Digital Signal Processing. An external clock can be provided at this logic input.

Alternatively, a parallel resonant AT crystal can be connected across CLKIN and CLKOUT to provide a

clock source for the ADE7752. The clock frequency for specified operation is 10 MHz. Ceramic load

capacitors between 22 pF and 33 pF should be used with the gate oscillator circuit. Refer to the crystal

manufacturer’s data sheet for load capacitance requirements.

20

CLKOUT

A crystal can be connected across this pin and CLKIN as described previously to provide a clock source

for the ADE7752. The CLKOUT pin can drive one CMOS load when an external clock is supplied at CLKIN

or when a crystal is being used.

21, 22

S0, S1

These logic inputs are used to select one of four possible frequencies for the digital-to-frequency conver-

sion. This offers the designer greater flexibility when designing the energy meter. See the Selecting a

Frequency for an Energy Meter Application section.

24, 23

F1, F2

Low Frequency Logic Outputs. F1 and F2 supply average real power information. The logic outputs can

be used to drive electromechanical counters and two-phase stepper motors directly. See the Transfer

Function section.