SA9904A Datasheet, PDF (1/12 Pages) Sames – Three Phase Power / Energy IC with SPI Interface

Three Phase Power / Energy IC
with SPI Interface
SA9904A
sames
FEATURES
+ Bi-directional active and reactive power/energy
measurement
+ RMS Voltage and frequency measurement
+ Individual Phase information
+ SPI communication bus
+ Meets the IEC 521/1036 Specification requirements for
Class 1 AC Watt hour meters
DESCRIPTION
The SAMES SA9904A is a three phase bi-directional
energy/power metering integrated circuit that performs
measurement of active and reactive power, mains voltage and
mains frequency.
The SA9904A is pin compatible to the SA9604A. New features
include, RMS mains voltage and accurate reactive power
measurements.
Measured values for active and reactive energy, the mains
voltage and frequency for each phase 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 60mW
+ Uses current transformers for current sensing
+ Operates over a wide temperature range
+ Precision voltage reference on-chip
This innovative universal three 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.
The SA9904A 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.
VDD VSS
IIP1
IIN2
IIP2
IIN2
IIP3
IIN3
IVP1
IVP2
IVP3
GND
CURRENT
ADC
VOLTAGE
ADC
VOLTAGE
REF.
ACTIVE
REACTIVE
SPI
RMS
VOLTAGE
MAINS
FREQ.
OSC
Dr-01598
VREF
OSC1 OSC2
Figure 1: Block diagram
SPEC-0076 (REV. 5)
1/12
DI
DO
SCK
CS
F150
05-09-01