SA9904B Datasheet, PDF (3/12 Pages) List of Unclassifed Manufacturers – Three Phase Power / Energy IC with SPI Interface

SA9904B
sames
PIN DESCRIPTION
PIN
Designation
Description
16
6
14
17, 20, 3
18, 19, 1, 2, 4, 5
15
10, 11
GND
VDD
Analog Ground. The supply voltage to this pin should be mid-way between
VDD and VSS.
Positive Supply voltage. The voltage to this pin is typically +2.5V if a shunt
resistor is used for current sensing or in the case of a current transformer a
+5V supply can be applied.
VSS
Negative Supply Voltage. The voltage to this pin is typically -2.5V if a shunt
resistor is used for current sensing or in the case of a current transformer a
0V supply can be applied.
IVP1, IVP2,
IVP3
Analog Input for Voltage Phase 1, Phase 2 and Phase 3. The current into the
A/D converter should be set at 14µARMS at nominal mains voltage. The voltage
sense input saturates at an input current of ±25µA peak.
IIP1, IIN1, IIP2, IIN2, ^{Inputs for current sensors. The shunt resistor voltage from each channel is}
IIP3, IIN3
converted to a current of 16µARMS at rated conditions. The current sense input
saturates at an input current of ±25µA peak.
VREF
This pin provides the connection for the reference current setting resistor.
A 47kW resistor connected to sets the optimum operating condition.
OSC1, OSC2 Connections for a crystal or ceramic resonator. (OSC1 = input; OSC2 = Output)
8
SCK
Serial clock in. This pin is used to strobe data in and out of the SA9904B
9
DO
Serial data out. Data from the SA9904B is strobed out on this pin. DO is
only driven when CS is active.
7
F50
Voltage zero crossover. The F50 output generates a pulse, on every
rising edge of the mains voltage for any one phase.
12
DI
Serial data in. Data is only accepted during an active chip select (CS).
13
CS
Chip select. The CS pin is active high.
IIP2 1
IIN2 2
IVP3 3
IIP3 4
IIN3 5
VDD 6
F50 7
SCK 8
DO 9
OSC1 10
20 IVP2
19 IIN1
18 IIP1
17 IVP1
16 GND
15 ^VREF
14 VSS
13 CS
12 DI
11 OSC2
Dr-01642
Figure 2: Pin connections: Package: PDIP20, SOIC20
ORDERING INFORMATION
Part Number
SA9904BPA
SA9904BSA
Package
PDIP20
SOIC20
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