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PDF SA9122EPA Data sheet ( Hoja de datos )
| Número de pieza | SA9122EPA | |
| Descripción | SINGLE PHASE UNIDIRECTIONAL POWER/ENERGY METERING IC WITH SEPERATE 64 SEGMENT LCD DRIVER | |
| Fabricantes | Sames | |
| Logotipo |  |
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sames
SA9122E
SINGLE PHASE UNIDIRECTIONAL POWER/ENERGY
METERING IC WITH SEPERATE 64 SEGMENT LCD DRIVER
FEATURES
n Performs unidirectional power and n Adaptable to different types of current
energy measurement
sensors
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
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.
4362
n Operates over a wide temperature
range
n Different pulse rate options available
for power information
n LCD data input via a serial interface
PIN CONNECTIONS
RX
V SS
CIP
CIN
COP
CON
IVN
IIP
IIN
GND
VREF
CPON
CPOP
CPIN
CPIP
V DD
R[0]
R[1]
R[2]
R[3]
1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
DR-00932
40 FOUT2
39 FOUT1
38 OSC1
37 OSC2
36 S[15]
35 S[14]
34 S[13]
33 S[12]
32 S[11]
31 S[10]
30 S[9]
29 S[8]
28 S[7]
27 S[6]
26 S[5]
25 S[4]
24 S[3]
23 S[2]
22 S[1]
21 S[0]
Package: DIP-40
PDS039-SA9122E-001 REV. A
1/12
19-09-1995
1 page  
SA9122E
PIN DESCRIPTION (Continued)
PLCC-44
19
20
21
22
24
25
26
27
28
29
30
31
32
33
35
36
37
38
39
40
1
12
23
34
DIP-40
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
Designation
R[0]
R[1]
R[2]
R[3]
S[0]
S[1]
S[2]
S[3]
S[4]
S[5]
S[6]
S[7]
S[8]
S[9]
S[10]
S[11]
S[12]
S[13]
S[14]
S[15]
NC
NC
NC
NC
Description
Output drivers for LCD back planes
Output drivers for LCD segments
Not connected
FUNCTIONAL DESCRIPTION
The SA9122E is a CMOS mixed signal Analog/Digital integrated circuit, which performs
power/energy calculations across a power range of 1000:1, to an overall accurancy of
better than Class 1, and includes a seperate 64 segment LCD display driver function.
The integrated circuit includes all the required functions for 1-phase power and energy
measurement such as two oversampling A/D converters for the voltage and current
sense inputs, power calculation and energy integration. Internal offsets are eliminated
through the use of cancellation procedures. The SA9122E generates pulses, the
frequency of which is proportional to the power consumption. Two frequency outputs
(FOUT1 and FOUT2) are available, with additional frequency options available on
request. The pulse rate follows the instantaneous power measured.
The separate Liquid Crystal Display driver function included on-chip, drives up to 64
segments on a 4 track muliplexed backplane display, programmable via a serial interface
having a RS232 protocol.
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5 Page 
SA9122E
Parts List for Application Circuit: Figure 1
Item Symbol Description
1 IC-1 SA9122E
2 XTAL Crystal, 3.5795MHz
3 R1 Resistor, 1% metal
4 R2 Resistor, 1% metal
5 R3 Resistor, 390k, (230VAC) 1%, metal
6 R4 Resistor, 1M, 1/4W, 1%, metal
7 R6 Resistor, 24k, 1/4W, 1%, metal
8 R7 Resistor, 24k, 1/4W, 1%, metal
9 R8 Resistor, 820Ω, 1/4W, 1%
10 R9 Resistor, 820Ω, 1/4W, 1%
11 C1 Capacitor, 560pF
12 C2 Capacitor, 560pF
13 C3 Capacitor, 3.3nF
14 C4 Capacitor, 3.3nF
15 C5 Capacitor, 100nF
16 C6 Capacitor, 100nF
17 C7 Capacitor, 820nF
18 LCD LCD 64 Segment, 4 back plane
19 RSH Shunt Resistor
Detail
DIP-40/PLCC-44
Colour burst TV
Note 1
Note 1
Note 2
Note 3
Note 1: Resistor (R1 and R2) values are dependant upon the selected value of RSH.
Note 2: Capacitor (C7) to be positioned as close to Supply Pins (V & V ) of IC-1 as
DD SS
possible.
Note 3: See TYPICAL APPLICATIONS when selecting the value of RSH.
ORDERING INFORMATION
Part Number
Package
SA9122EPA
DIP-40
SA9122EFA
PLCC-44
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