SA9109B
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.
BLOCK DIAGRAM
V BA
S D0
R[0] R[1] R[2] R[3]
V DD
V SS
CIN
CIP
CON
COP
SERIAL
OUT
INTERFACE
S [0]
S [1]
S [2]
S [3]
S [4]
IV N
GND
IIP
IIN
ANALOG
SIGNAL
PRO-
CESSING
TARIFF
REGISTERS
LCD
CONTROL
INT EG RAT .
&
P UL S E
RAT E
G ENE RAT IO N
S [5]
S [6]
S [7]
S [8]
S [9]
S [10]
S [11]
S [12]
S [13]
COFF
CPOP
CPON
CPIN
V RE F
OSCI
REF
TIMING & CONTROL
OSC
OSC2
DR-01253
P GM
PB
P DTA
P CLK
S R[0]
S R[1]
2/18
sames
SAMES [ SAMES ]
