SA9109B

2/18

sames

BLOCK DIAGRAM

DESCRIPTION (continued)

The measured energy is displayed in kiloWatt hours (kWh). The SA9109B is capable

of driving a display having a resolution of 1/10 kWh.

This innovative universal energy metering integrated circuit is ideally suited for energy

measurement in single phase systems.

The SA9109B integrated circuit is available in a 44 pin plastic leaded chip carrier (PLCC-

44) package type.

SERIAL

OUT

INTERFACE

TIMING & CONTROL

IN TE GRA T .

&

PULSE

RAT E

G E NE RAT IO N

TARIFF

REGISTERS

DR-01253

VREF

CPIN

CPON

CPOP

PGM

REF

PDTA

PB

COP

IV N

GND

IIN

IIP

CIN

CIP

CON

VBA

ANALO G

SIGNAL

PRO-

CESSING

SD0

SR[1]

SR[0]

PCLK

OSC

OSCI

OSC2

S[10]

S[13]

COFF

S[11]

S[12]

R[0]

LCD

CONTROL

DD

R[3]

R[1] R[2]

V

S[3]

S[4]

S[5]

S[6]

S[7]

S[8]

S[9]

S[0]

V SS

S[1]

S[2]