SPEC-1081 (REV. 2)

12/15

29-09-2017

SA4101A

PROGRAMMING

The resistor values are calculated for a 40A rated meter. The

LED pulse rate must be set accordingly by programming pins

R0, R1 and R2. Using the Rated Conditions Select section,

settings will configure the SA4101A for 220V/40A operation

with a LED pulse rate of 1600 pulses/kWh. The FAST pin is

Figure 11: Typical application circuit

Table 4: Component list for typical application

Symbol

Description

U1

Energy metering device, SA4101ASAR

U2

Opto-coupler, 1N35

RSH

Shunt Resistor, 40A, 320μ



Resistor, 200

, 1%, metal film

R5, R6

Resistor, 200k

, 1%, metal film

Resistor, 100k

, 1%, metal film

R9

Resistor, 2.7k

, 1%, metal film

Resistor, 47k

, 1%, metal film

R11

Resistor, 680

, 5%, carbon film

Symbol

Description

R12, R13

Resistor, 100

, 5%, carbon film

R14

Resistor, 1k

, 5%, carbon film

P1

Trim-pot, 25 turns, 1k



C1, C2

Capacitor, 100nF, ceramic

C3

Capacitor, 2.7nF, ceramic

Capacitor, 220nF, ceramic

Capacitor, 1μF, ceramic

D1

Light emitting diode, pulse output

D2

Light emitting diode, direction output

CNT1

Stepper motor counter, 100imp/kWh

Note 1: Resistors R2, R4, R8 and R10 must be positioned as close as possible to the respective device pins

Note 2: Capacitors C4, C5 and C6 must be positioned as close as possible to the VDD and VSS power supply pins

8

14

3

VDD

VSS

VREF

IIP

IIN

U1

LED

MON

MOP

IVP

AGND

20

19

12

15

13

2

1

C2

R3

R4

R1

R2

200



200



200



200



C1

100nF

100nF

R10

47k



-2.5V

+2.5V

R5

200k



R6

200k



R7

100k



R8

100k



P1 1k



R9

2.7k



0V

0V

R13

100



R12

100



CNT1

7 6 5 4 3 2 . 1

D1

Pulse

+2.5V

R11

680



Pulse Out

U2

4N35

LIVE IN

NEUTRAL

0V

LIVE OUT

C3

2.7nF

0V

C4

220nF

C5

220nF

C6

1µF

+2.5V

-2.5V

0V

RSH

320µ



0V

DIRO

17

R14

1k



D2

Direction

+2.5V

R1

SO

5

11

6

R0

R2

FAST

4

7

-2.5V

+2.5V

CNF

9

DIRI

18

-2.5V