FEATURES

motors

trim-pots required

implementation for meter manufacturers

sames

sames

Programmable Three Phase Power / Energy Metering

IC for Stepper Motor / Impulse Counter Applications

SA2005P

1/16

SPEC-0086 (REV. 2)

07-02-01

Class 1 AC Watt hour meters

DESCRIPTION

The SAMES SA2005P provides a single chip active energy

metering solution for three phase mechanical counter-based

meter designs.

Th SA2005P does not require any external trim-pots or resistor

ladders for meter calibration. Calibration and meter

configuration information is stored on a small external

EEPROM.

Meter setup stored on the EEPROM includes various metering

direction modes (total sum, absolute sum, positive or negative

energy) phase calibration data, rated metering conditions,

LED pulse rate, counter pulse width, counter resolution and

creep current.

A programmable rate pulse output is available for meter

calibration purposes. Per phase voltage fail and voltage

sequence faults as well as energy direction indication are

available as LED outputs. Programmable dividers enable

various mechanical counter or stepper motor counter

resolutions.

A precision oscillator, that replaces an external crystal, is

integrated on chip. A voltage reference is integrated on chip.

The SA2005P integrated circuit is available in 24-pin dual in

line plastic (DIP-24) and small outline (SOIC-24) package

options.

Figure 1: Block diagram

REF

OSC

TIMING & CONTROL

PH / DIR

TEST

LED

VDD VSS

IVN1

X

IIN1

IIP1

VREF

GND

IVN2

X

I2

V2

IIN2

IIP2

IVN3

X

I3

V3

IIN3

IIP3

INTERFACE

SCL

SDA

MON

MOP

RLOAD

PH2

PH1

PH3

PROG.

ADDER

POWER

TO

PULSE

RATE

PROGRAM-

MABLE

ADDER

I1

V1

CHANNEL

BALANCE

CHANNEL

BALANCE

CHANNEL

BALANCE

dr-01605