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sames

sames

SA2007P

http://www.sames.co.za

Figure 2: Pin connections: Package: DIP-20, SOIC-20

Part Number

SA2007PPA

SA2007PSA

Package

DIP-20

SOIC-20

ORDERING INFORMATION

PIN DESCRIPTION

Analog Ground. The 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

The current into the A/D converter should be set at 14µA

at nominal mains voltage. The voltage

RMS

sense input saturates at an input current of ±25µA peak.

19

IVP

Inputs for current sensor - channel 1 and channel 2. The shunt resistor voltage from each channel

is converted to a current of 16µA

at rated conditions. The current sense input saturates at an

RMS

input current of ±25µA peak.

1, 2,

3, 4

IIN1, IIP1

IIN2, IIP2

This pin provides the connection for the reference current setting resistor. A 24kW resistor

connected to V sets the optimum operating condition.

SS

5

VREF

Serial clock output. This output is used to strobe data from the external EEPROM.

6

SCL

Serial data. Send and receive data from an external EEPROM.

7

SDA

Motor pulse outputs. These outputs can be used to drive an impulse counter or stepper motor directly.

9, 12

MON, MOP

Calibration LED output. Refer to section Led Output (LED) for the pulse rate output options.

13

LED

Configuration reload input. A falling edge will trigger a register reload from the external EEPROM.

15

RLOAD

Current channel select output. This output indicates which channel is been used for kWh metering.

16

SEL1

Earth loop tamper output. This output indicates an earth loop tamper condition.

17

ELT

Direction output. This output indicates the energy flow direction

18

DIRO

Test input. Connect to V

for normal operation.

SS

10, 11 TEST, TCLK

DR-01595

1

IIN1

GND

SEL1

IIP1

IVP

RLOAD

IIN2

DIRO

VSS

IIP2

VREF

SCL

SDA

VDD

ELT

LED

MOP

TCLK

TEST

MON

2

3

4

5

6

15

14

13

12

11

10

9

8

7

16

17

18

19

20

PRELIMINARY