FEATURES

n Functionally compatible with the SA9105F with reduced

external components

n Performs bidirectional one, two or three phase power and

energy measurement

n Meets the IEC 521/1036 Specification requirements for

Class 1 AC Watt hour meters

sames

sames

Three Phase Bidirectional Power/Energy

Metering IC with Instantaneous Pulse Output

SA2005F

1/10

SPEC-0042 (REV. 1)

03-07-00

n Operates over a wide temperature range

n Uses current transformers for current sensing

n Easily adaptable to different signal levels

n Precision voltage reference on chip

n Precision oscillator on chip.

n Protected against ESD

DESCRIPTION

The SAMES SA2005F is an enhancement of the SA9105F. A

precision oscillator and the loop capacitors are integrated on

chip.

The SAMES SA2005F three phase bidirectional power/energy

metering integrated circuit generates pulse rate outputs for

positive and negative energy directions. The frequency of the

pulses is proportional to the measured power consumption.

The SA2005F performs active power calculation.

The method of calculation takes the power factor into account.

Energy consumption is determined by integrating the power

measurement over time.

This innovate universal three phase power/energy metering

integrated circuit is ideally suited for applications such as

residential and industrial energy metering and control.

The SA2005F integrated circuit is available in 20 pin dual-in-

line plastic (DIP-20), and 20 pin small outline (SOIC-20)

package types.

Figure 1: Block Diagram

POWER

TO

PULSE

RATE

REF

OSC

TIMING & CONTROL

INTEGRATE

AND

AVERAGE

DIR

TCLK

TEST

FOUT

PGM0 PGM1

VDD VSS

IVN1

X

I1

V1

IIN1

IIP1

VREF

GND

Dr-01570

IVN2

X

I2

V2

IIN2

IIP2

IVN3

X

I3

V3

IIN3

IIP3