SA9604A
PIN DESCRIPTION
Pin
16
6
14
17
20
3
19
18
2
1
5
4
10
11
9
12
8
13
7
15
Designation
GND
V
DD
V
SS
IVP1
IVP2
IVP3
IIN1
IIP1
IIN2
IIP2
IIN3
IIP3
OSC1
OSC2
DO
DI
SCK
CS
FM150
VREF
Connections for crystal or ceramic resonator
(OSC1 = Input; OSC2 = Output)
Serial Interface Out
Serial Interface In
Serial Clock In
Chip Select (Active High)
Voltage Sense Zero Crossover
Connection for current setting resistor
Input for Current sensor: Phase 3
Input for Current sensor: Phase 2
Description
Ground
Positive Supply Voltage
Negative Supply Voltage
Analog input for Voltage: Phase 1
Analog input for Voltage: Phase 2
Analog input for Voltage: Phase 3
Inputs for Current sensor:Phase 1
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.
Internal offsets are eliminated through the use of cancellation procedures. The SA9604A
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.
This output of 150Hz will allow monitoring by a microcontroller to synchronise with internal
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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sames
SAMES [ SAMES ]
