REV. PrB 08/01

PRELIMINARY TECHNICAL DATA

ADE7752

–10–

NO LOAD THRESHOLD

The ADE7752 also includes a “no load threshold” and

“start-up current” feature that will eliminate any creep

effects in the meter. The ADE7752 is designed to issue a

minimum output frequency. Any load generating a frequency

lower than this minimum frequency will not cause a pulse to

be issued on F1, F2 or CF. The minimum output frequency

is given as 0.0007% of the full-scale output frequency for

example, an energy meter with a meter constant of 100 imp/

frequency at F1 or F2 would be 0.0007% of 4.77 Hz or 33.3

x 10

In this example the no load threshold would be equivalent to

1.2 W of load or a start-up current of 5.5 mA at 220 V.

REVERSE POWER INFORMATION

The ADE7752 detects when the current and voltage channels

of any of the three phase inputs have a phase difference

greater than 90° i.e.

can detect wrong connection of the meter or generation of

Active Energy.

The REVP pin output will go active high when negative

power is detected on any of the three phase inputs. If positive

Active Energy is detected on all the three phases, REVP pin

output is Low. The REVP pin output changes state at the

same time as a pulse is issued on CF. If several phases

measure negative power, the REVP pin output will stay low

until all the phases measure positive power.

OUTLINE DIMENSIONS

Dimensions shown in inches and (mm).

0.0125 (0.32)

0.0091 (0.23)

8

0

0.0291 (0.74)

0.0098 (0.25)

45

0.0500 (1.27)

0.0157 (0.40)

SEATING

PLANE

0.0118 (0.30)

0.0040 (0.10)

0.0192 (0.49)

0.0138 (0.35)

0.1043 (2.65)

0.0926 (2.35)

0.0500

(1.27)

BSC

24

13

12

1

0.4193 (10.65)

0.3937 (10.00)

0.2992 (7.60)

0.2914 (7.40)

PIN 1

0.6141 (15.60)

0.5985 (15.20)

24-SOIC Outline Package

(AR-24)

NOTE

For a complete datasheet of the ADE7752, please contact us

on our website at:

http://forms.analog.com/Form_Pages/energymeter/

contact.asp