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SA9122E
FEATURES
n Performs unidirectional power and
energy measurement
n On-chip 64 segment LCD driver
n Meets the IEC 521/1036 Specification
requirements for Class 1 AC Watt hour
meters
n Total power consumption rating below
25 mW
n Adaptable to different types of current
sensors
n Operates over a wide temperature
range
n Different pulse rate options available
for power information
n LCD data input via a serial interface
SINGLE PHASE UNIDIRECTIONAL POWER/ENERGY
METERING IC WITH SEPERATE 64 SEGMENT LCD DRIVER
4362 PDS039-SA9122E-001 REV. A 19-09-1995
PIN CONNECTIONS
DESCRIPTION
The SAMES SA9122E Single Phase
unidirectional active Power/Energy metering
integrated circuit includes a seperate on-
chip 64 segment Liquid Crystal Display driver.
The power/energy metering circuit generates
a pulse rate output, proportional to the power
consumption, while the LCD driver is
programmable via a serial interface.
The method of power calculation takes the
power factor into account. Energy consump-
tion is determined by the power measurement
being integrated over time.
The LCD driver is capable of driving 8 decimal
digits (7 segment) and 8 announciators on a
4 track multiplexed backplane display.
This innovative combination energy metering/
LCD display driver integrated circuit has
been designed to provide meter designers
with flexibility in the choice of the µ-controller
employed, and is ideally suited for applica-
tions such as residential municipal metering
and factory energy metering and control.
The SA9122E integrated circuit is available
in both 40 pin dual-in-line plastic (DIP-40), as
well as 44 pin plastic leaded chip carrier
(PLCC-44) package types.
DR-00932
11
VREF
V
R[3]
R[2]
R[1]
R[0]
DD
CPOP
CPON
CPIP
CPIN
16
17
18
19
20
12
13
14
15
1
RX
CON
IVN
IIP
GND
IIN
SS
V
COP
CIN
CIP
6
7
8
9
10
3
5
4
2
30
S[9]
25
21
22
23
24
S[0]
S[1]
S[2]
S[3]
S[4]
29
28
27
26
S[5]
S[6]
S[7]
S[8]
40
FOUT2
35
S[14]
34
31
32
33
S[10]
S[11]
S[12]
S[13]
36
37
38
39
S[15]
OSC1
FOUT1
OSC2
Package: DIP-40
