SA9604A
PIN DESCRIPTION
Pin
Designation
Description
16
6
GND
VDD
Ground
Positive Supply Voltage
14
17
20
3
VSS
Negative Supply Voltage
IVP1
IVP2
IVP3
IIN1
IIP1
Analog input for Voltage: Phase 1
Analog input for Voltage: Phase 2
Analog input for Voltage: Phase 3
Inputs for Current sensor:Phase 1
19
18
2
IIN2
IIP2
Input for Current sensor: Phase 2
Input for Current sensor: Phase 3
1
5
IIN3
IIP3
4
10
11
9
OSC1
OSC2
DO
Connections for crystal or ceramic resonator
(OSC1 = Input; OSC2 = Output)
Serial Interface Out
12
8
DI
Serial Interface In
SCK
CS
Serial Clock In
13
7
Chip Select (Active High)
Voltage Sense Zero Crossover
Connection for current setting resistor
FM150
VREF
15
FUNCTIONAL DESCRIPTION
The SA9604A is a CMOS mixed signal Analog/Digital Integrated Circuit, which performs
the measurement of active power, reactive power, voltage and frequency.
Internaloffsetsareeliminatedthroughtheuseofcancellationprocedures. TheSA9604A
integrates the measured active and reactive power consumption and the average mains
voltage into 24 bit integrators, which are accessable via the SPI bus. The mains
frequency information is also available as a 24 bit register value.
The zero crossover of each voltage sense input is signalled on the FM150 (pin 7) output.
Thisoutputof150Hzwillallowmonitoringbyamicrocontrollertosynchronisewithinternal
timing for data aquisition. Refer to 5.5 for further information.
The SA9604A has tristate output to allow connection of more than one metering device
on a single SPI bus.
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sa m e s
SAMES [ SAMES ]
