SC7755

ELECTRICITY POWER METER CIRCUIT

SSOP-24

SDIP-24

DESCRIPTION

The SC7755 is a high accuracy electrical energy measurement IC

that can provides superior stability and accuracy over extremes in

environmental conditions and over time. The SC7755 does not exhibit

any creep when there is no load.

The SC7755 supplies average real power information on the low

frequency outputs F1 and F2. This logic outputs may be used to

directly drive an electromechanically counter or interface to an MCU.

The CF logic output gives instantaneous real power information. This

output is intended to be used for calibration purposes, or interfacing to

an MCU.

The SC7755 includes a power supply monitoring circuit on the

AVDD supply pin. If the supply falls below 4V, the SC7755 will be

reset and F1, F2 will be set to logic high, CF will be set to logic low at

the same time.

The SC7755 provides synchronous frequency output for auto-

reading meter system. The CF logic output is synchronous with the F1

and F2 logic output to ensure the show value of the meter is

consonant with the real value.

ORDERING INFORMATION

Device

Package

SC7755S

SSOP-24-300-0.65

SC7755

SDIP-24-300-2.54

FEATURES

* Single 5V supply, low power.

* On-chip power supply monitoring.

* On-chip reference with external overdrive capability.

* Supplies average real power on the frequency outputs F1 and F2, which can drive for electromechanical

counters directly.

* The high frequency output CF is intended for calibration and supplies instantaneous real power.

* Less than 0.1% error over a dynamic range of 500 to 1.

* On-chip creep protection (No load threshold).

* The logic output REVP can be used to indicate a potential miswiring or negative power.

* A PGA in the current channel make flexible to select the shunt and burden resistance.

HANGZHOU SILAN MICROELECTRONICS CO.,LTD

REV:2.2

2008.01.07

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