SA9903B Datasheet, PDF (1/12 Pages) Sames – Single Phase Power / Energy IC with SPI Interface

Single Phase Power / Energy IC
with SPI Interface
SA9903B
sames
+ FEATURES
+ Bi-directional active and reactive power/energy
measurement
+ RMS Voltage and frequency measurement
+ SPI communication bus
+ Meets the IEC 521/1036 Specification requirements for
Class 1 AC Watt hour meters
DESCRIPTION
The SAMES SA9903B is a single phase bi-directional
energy/power metering integrated circuit that performs
measurement of active and reactive power, mains voltage and
mains frequency.
The SA9903B is pin compatible to the SA9603B. New features
include, RMS mains voltage and accurate reactive power
measurements.
Measured values for active and reactive energy, the mains
voltage and frequency are accessible through a SPI bus from
24 bit registers.
+ Meets the IEC 1268 Specification requirements for VAR
hour meters
+ Protected against ESD
+ Total power consumption rating below 25mW
+ Adaptable to different current sensor technologies
+ Operates over a wide temperature range
+ Precision voltage reference on-chip
This innovative universal single phase power/energy metering
integrated circuit is ideally suited for energy calculations in
applications such as electricity dispensing systems (ED's),
residential municipal metering and factory energy metering
and control.
TheSA9903B integrated circuit is available in both 20 pin dual-
in-line plastic (DIP-20), as well as 20 pin small outline (SOIC-
20) package types.
TEST
VDD VSS
IIP
IIN
IVP
GND
CURRENT
ADC
VOLTAGE
ADC
VOLTAGE
REF.
ACTIVE
REACTIVE
SPI
RMS
VOLTAGE
MAINS.
FREQ.
OSC
Dr-01583
VREF
OSC1 OSC2
Figure 1: Block diagram
SPEC-0051 (REV. 2)
1/12
DI
DO
SCK
CS
FMO
26-02-01