Data brief

For further information contact your local STMicroelectronics sales office.

February 2012

Doc ID 022759 Rev 2

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STEVAL-IPE010V2

Energy meter demonstration kit

motherboard based on the STPMC1

Features

Description

The purpose of the demonstration board is to

provide an evaluation platform for the STPMC1

and STPMS2L devices, but it can also be used as

a starting point to design a Class 1 meter for 2 to

4-wire power line systems using delta or wye

service.

The STPMC1 is a metering ASSP implemented

through an advanced 0.35 µm BCD6 technology.

The STPMS2L is an ASSP designed as a building

block for single or multi-phase energy meters.

The STEVAL-IPE010V2 board is the motherboard

based on the STPMC1 and works in conjunction

with up to 5 STEVAL-IPE014V1 daughterboards

(to be ordered separately), each with an

STPMS2L mounted to sense the voltage and

current of each phase.

Each phase is monitored by an independent

daughterboard, in which an autonomous power

supply is provided to the board itself and, once it

is connected, also to the motherboard.

On this board, the STPMS2L device senses the

phase current through a CT or a shunt sensor,

and the phase voltage through a voltage divider.

The presence of dedicated networks greatly

reduces the sampling (aliasing) noise and the

crosstalk noise between voltage and current

channels, increasing meter precision. The

STPMS2L produces a sigma-delta stream, sent

together with the supply voltage, to the STPMC1

through a card edge connector.

The STEVAL-IPE010V2 motherboard receives

the sigma-delta streams from the daughterboards

which are further elaborated by the STPMC1.

This device, from a 4.194 MHz crystal oscillator,

provides a common clock with programmable

frequency to all the daughterboards.

The STEVAL-IPE010V2 motherboard, through a

10-pin flat cable connector, can be interfaced to a

microprocessor board to implement advanced

metering features (multi-tariff, data management

and storage, communication, etc). It also has

stepper motor connectors for simple energy meter

implementation.

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