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sames

SA2102D

http://www.sames.co.za

PIN DESCRIPTION

Figure 3: Pin connections: Package: PDIP20, SOIC20

1

IIN

AGND

IIP

IVP

MON

DIRI

VSS

VREF

R2

R1

R0

FAST

VDD

DIRO

NC

LED

MOP

CNF

NC

SO

2

3

4

5

615

14

13

12

11

10

9

8

7

16

17

18

19

20

SA2102D

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.

AGND

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.

14

Analog Input for Voltage. The current into the voltage sense input IVP should be set at 14µA

at

Nominal Mains Voltage(V

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

RM S

NOM

19

IVP

Analog input for current. The current into the current sense input IIP pin should be set at 16µA

at Maximum Rated Mains Current (I

). The current sense input saturates at ±25µA peak.

RMS

MAX

1,2

IIN, IIP

This pin provides the connection for the reference current setting resistor. A 47k

resistor

connected to

sets the optimum operating condition.

W

3

VREF

Rated Condition Select. These inputs are used for the different rated condition configuration.

Refer to the Rated Condition Select section.

6, 5, 4

R0, R1, R2

This input is used to select between STANDARD and FAST mode (LED output pulse rate).

Refer to the LED output section.

7

FAST

Configure / Test input. For normal operation this pin must be connected to

.

9

CNF

Motor pulse outputs. These outputs can drive an electromechanical counter directly.

12, 15

MOP, MON

Calibration LED output. Refer to the Rated Condition Select section of the pulse rate output options.

13

LED

Direction indicator output. This output indicates the energy flow direction.

17

DIRO

Direction select input. This input is used to enable either bi-directional or uni-directional energy

measurement.

18

DIRI

No Connection.

10, 16

NC

Select Output. When fast mode is selected this input can be used to enable or disable the internal

pulse stability circuitry for the LED output pulses. Refer to the Select Output section.

11

SO