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SA9903BSA Datasheet(PDF) 3 Page - Sames |
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SA9903BSA Datasheet(HTML) 3 Page - Sames |
3 / 12 page 3/12 sames sames SA9903B http://www.sames.co.za Figure 2: Pin connections: Package: DIP-20, SOIC-20 Part Number SA9903BPA SA9903BSA Package DIP-20 SOIC-20 ORDERING INFORMATION PIN DESCRIPTION Analog Ground. The supply voltage to this pin should be mid-way between V and V . DD SS 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. GND V DD Designation Description PIN 20 8 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. V SS 14 Analog Input for Voltage. The current into the A/D converter should be set at 14µA at nominal mains voltage. The voltage sense input saturates at an RMS input current of ±25µA peak. 19 IVP Inputs for current sensor. The shunt resistor voltage from each channel is converted to a current of 16µA at rated conditions. The current sense input RMS saturates at an input current of ±25µA peak. 1, 2 IIN, IIP This pin provides the connection for the reference current setting resistor. A 24kW resistor connected to V sets the optimum operating condition. SS 3 VREF Manufacturers test pin, connect to V for normal operation. SS 7 TEST Connections for a crystal or ceramic resonator. (OSC1 = input; OSC2 = Output) 10, 11 OSC1, OSC2 Serial clock in. This pin is used to stobe data in and out of the SA9903B 12 SCK Serial data out. Data from the SA9903B is strobed out on this pin. DO is only driven when CS is active. 13 DO Voltage zero crossover. The FMO output generates a pulse (50% duty cycle) on every rising edge of the mains voltage. 15 FMO Serial data in. Data is only accepted during an active chip select (CS). 17 DI Chip select. The CS pin is active high. 18 CS Manufacturers Test Pins. (Leave unconnected) 4, 5, 6, 9, 16 TP4, TP5, TP6, TP9, TP16 1 IIN GND IIP IVP FMO CS VSS VREF TP4 TP5 TP6 TEST VDD DI TP16 DO SCK TP9 OSC2 OSC1 2 3 4 5 6 15 14 13 12 11 10 9 8 7 16 17 18 19 20 DR-01225 |
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