Datasheet SA9110AFA Datasheet (SAMES)

sames

SA9110A

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n Pulse output for calibration
n Total power consumption rating below

40mW

n Adaptable to different types of current

sensors

n Operates over a wide temperature

range

n Precision voltage reference on-chip
n Protected against ESD

4365 PDS039-SA9110A-001 REV. B 28-08-1996

Package: PLCC-68

MONOCHIP THREE PHASE BIDIRECTIONAL

KILOW A TT HOUR METERING IC

DESCRIPTION

The SAMES SA9110A Three Phase bidi­rectional energy metering integrated cir­cuit has an integrated Liquid Crystal Dis­play (LCD) driver for a 7 digit (7 segment)
display as well as 4 multiple tariff registers.
The SA9110A performs the active power
calculation.

The method of calculation takes the power
factor into account.

The measured energy is displayed in kilo
Watt hours (kWh). The SA9110A is capa­ble of driving a display having a resolution
of 1/10 kWh.

This innovative universal energy metering
integrated circuit is ideally suited for en­ergy measurement in three phase sys­tems.

The SA9110A integrated circuit is avail­able in a 68 pin plastic leaded chip carrier
(PLCC-68) package type.

PIN CONNECTIONS

FEATURES

n Performs bidirectional energy meter-

ing and directly drives a LCD with 7
digits plus announciators

n 4 externally selectable on-chip tariff

registers

n An additional total energy register
n Meets the IEC 521/1036 Specification

requirements for Class 1 AC Watt hour
meters

n Optical interface for electronic reading

according to IEC1107 Mode D

S[6]

CIP1

IVP3

DR-00952

6
7

8
9

IVP2
IVP1
TP9

TP13

TP10

TP11

GND

10 11 12

COP2

CON2

CON1

COP1

13 14 15 16 17

SR[0]

67
68

1

3

5

2

4

V

SS

DD

V
VREF

CON3
COP3

SR[1]

62

65

61

63
64

66

TP61
SDO
PCLK
PDTA
PGM
PB

57585960 5253545556

S[12]

S[11]

OSC1

S[13]

OSC2

S[10]

S[9]

S[8]

S[7]

31

IIN3

23

CIN3

CIN1

CIN2

CIP3

CIP2

18 19 20 21 22

TP24

V

DD

TP26

28

29

27

30

24 25 26

IIP2
IIN2
IIP1
IIN1

464748495051

32

33

34

35

36

37

38

39

40

41

42

43

4445

S[1]

S[5]

S[4]

S[3]

S[2]

S[0]

TP44

VBA
V

SS

CONP

CIPP

CINP

COPP
IIP3

COFF
R[3]
R[2]

R[1]
R[0]

SA9110A

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BLOCK DIAGRAM

ABSOLUTE MAXIMUM RATINGS*

Parameter Symbol Min Max Unit

Supply Voltage VDD -V

SS

-0.3 6.0 V

Current on any pin I

PIN

-150 +150 mA

Storage Temperature T

STG

-40 +125 °C

Operating Temperature T

O

-10 +70 °C

* Stresses above those listed under “Absolute Maximum Ratings” may cause perma-

nent damage to the device. This is a stress rating only. Functional operation of the
device at these or any other condition above those indicated in the operational sections
of this specification, is not implied. Exposure to Absolute Maximum Ratings for
extended periods may affect device reliability.

SERIAL

OUT

INTERFACE

TIMING & CONTROL

INTEGRAT.

&

PULSE

RATE

GENERATION

TARIFF

REGISTERS

PDTA

SDO

IIP2

DR-00953

VREF

IIP2

IIP3

IIN2

GND

PGM

REF

PB

IVP3

IIP1
IIN1

IVP1

IVP2

16 CONNECTIONS
FOR LOOPCAPS

ANALOG

SIGNAL

PRO-

CESSING

S[10]

SR[1]SR[0]PCLK

OSC

OSC2

OSC1

COFF

S[11]
S[12]

S[13]

DD

V

VBA R[0]

LCD

CONTROL

R[3]R[2]R[1]

V

S[3]
S[4]
S[5]
S[6]
S[7]
S[8]
S[9]

S[0]
S[1]
S[2]

SS

SA9110A

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ELECTRICAL CHARACTERISTICS

(Over the temperature range -10°C to +70°C#, unless otherwise specified.)

Parameter Symbol Min Typ Max Unit Condition

Supply Voltage VDD-V

SS

4.5 5.5 V

Supply Current I

DD

15 mA
Nonlinearity of
power calculation -0.3 +0.3 % 1% - 100% of

rated power
Current Sensor Inputs (Differential)
Input Current Range I

II

-25 +25 µA Peak value
Voltage Sensor Inputs (Asymmetric)
Input current Range I

IV

-25 +25 µA Peak value
LCD backplane Voltage V

B

VDD &
V

SS

V R[0] .. R[3]

LCD segment Voltage V

S

1/3 V

DD

2/3V

DD

V S[0] .. S[15]

Pin SDO

Pulse rate f

P

3.5 Hz Default

1

80 Hz Programmed

1

Output Voltage Low V

OL

VSS+1 V IOL = 5mA

Output Voltage High V

OH

VDD-1 V IOH = -2mA

Oscillator Recommended crystal:

TV colour burst crystal f = 3.5795 MHz

Pin VREF With R7 = 24kΩ

Ref. Current -I

R

45 50 55 µA connected to V

SS

Ref. Voltage V

R

1.1 1.3 V Referred to V

SS

Pins

PB

, SR[0], SR[1],

PGM

Input Voltage High V

IH

4V

Input Voltage Low V

IL

1V

Pullup Current 30 µA VIN = V

SS

Pin PCLK

Input Voltage High V

IH

4V

Input Voltage Low V

IL

1V

Input Current High/ ±30 µA VIN=VSS..V

DD

Low

Pin V

BA

I

MAX

50 nA Power down

V

MIN

1.1 V mode

#

Extended Operating Temperature Range available on request

Note 1: At rated conditions

SA9110A

4/18

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Pin Designation Type Description

12 GND Supply Ground

1V

DD

Supply Positive Supply Voltage

25 V

DD

Supply

2V

SS

Supply Negative Supply Voltage

37 V

SS

Supply

38 VBA Supply Battery back-up. Negative Supply Voltage

8 IVP1 Analog in Input for voltage sense : Phase 1
7 IVP2 Analog in Input for voltage sense : Phase 2

6 IVP3 Analog in Input for voltage sense : Phase 3
27 IIN1 Analog in Inputs for current sensor : Phase 1
28 IIP1 Analog in
29 IIN2 Analog in Inputs for current sensor : Phase 2
30 IIP2 Analog in
31 IIN3 Analog in Inputs for current sensor : Phase 3
32 IIP3 Analog in
60 OSC1 Input Connections for crystal or ceramic resonator
59 OSC2 Output (OSC1 = Input; OSC2 = Output)
39 R[0] Output Liquid crystal display (LCD) backplane drivers
40 R[1] Output
41 R[2] Output
42 R[3] Output
45 S[0] Output Liquid crystal display (LCD) segment drivers
46 S[1] Output
47 S[2] Output
48 S[3] Output
49 S[4] Output
50 S[5] Output
51 S[6] Output
52 S[7] Output
53 S[8] Output
54 S[9] Output
55 S[10] Output
56 S[11] Output
57 S[12] Output
58 S[13] Output
43 COFF Output Connection for all unused LCD segments, to ensure

off status

PIN DESCRIPTION

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PIN DESCRIPTION (continued)

Pin Designation Type Description

16 CON1 Analog Connections for outer loop capacitors of A/D
17 COP1 Analog converters
15 CON2 Analog
14 COP2 Analog

4 CON3 Analog

5 COP3 Analog
34 CONP Analog
33 COPP Analog
19 CIN1 Analog Connections for inner loop capacitors of A/D
18 CIP1 Analog converters
21 CIN2 Analog
20 CIP2 Analog
23 CIN3 Analog
22 CIP3 Analog
36 CINP Analog
35 CIPP Analog

3 VREF Analog Connection for reference current setting resistor
62 SDO Open drain Pulse rate output. Serial data output when PB is low
67 SR[0] Input Control for tariff register selection (on-chip pull-up)
68 SR[1] Input Control for tariff register selection (on-chip pull-up)
66 PB Input Push Button: Display select/start serial data

transmission on SDO (on-chip pull-up)

65 PG M Input Programming Mode . It is recommended that pin PGM

be connected to VDD via a 470

Ω resistor to guard

against transients or noise.

64 PDTA Input Programming Data (on-chip pull-down)
63 PCLK Input Programming Clock

9 TP9 Manufacturer's test pins (Leave unconnected)
10 TP10
11 TP11
13 TP13
24 TP24
26 TP26
44 TP44
61 TP61

SA9110A

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FUNCTIONAL DESCRIPTION

The SA9110A is a CMOS mixed signal Analog/Digital integrated circuit, which performs
three phase energy calculations across a power range of 1000:1, to an overall accurancy
of better than Class 1. An on-chip LCD driver directly drives a 7 digit (7 segment) LCD.
Also included on-chip, are 4 x tariff registers externally selectable for multi-tariff energy
metering applications and a fifth register which retains the total energy consumption.

The integrated circuit includes all the required functions such as two oversampling A/D
converters for the voltage and current sense inputs, power calculation and energy
integration. Offset is eliminated through the use of internal cancellation procedures.

1. Power Calculation

In the Application Circuit (Figure 1), the mains voltage from Line 1, Line 2 and Line
3, are converted to currents and applied to the voltage sense inputs IVP1, IVP2 and
IVP3.

The current levels on the voltage sense inputs are derived from the mains voltage
(3 x 230 VAC) being divided down through voltage dividers to 14V. The resulting
input currents into the A/D converters are 14µA through the resistors R15, R16 and
R17.

For the current sense inputs the voltage drop across the current transformers
terminating resitors are converted to currents of 16µA for rated conditions, by means
of resistors R8, R9 (Phase 1); R10, R11 (Phase 2) and R12, R13 (Phase 3).

The signals providing the current information are applied to the current sensor inputs
IIN1, IIP1, IIN2, IIP2 and II3, IIP3.

A pulse rate output for calibration purposes is available on SDO (Pin 62), the pulse
rate being proportional to the active energy consumption.

The integrated anti-creep function ensures no metering when no line current is
present.

2. Analog Input Configuration

The input circuitry of the current and voltage sensor inputs are illustrated below.
These inputs are protected against electrostatic discharge through clamping

diodes.
The feedback loops from the outputs of the amplifiers AI and AV generate virtual

shorts on the signal inputs. Exact duplications of the input currents are generated
for the analog signal processing circuitry.

SA9110A

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3. LCD Driver

The SA9110A has an on-chip LCD driver capable of driving a 4 backplane, 7 digit
(7 segment) display, as well as 6 announciators.

The backplane repitition frequency is approximately 90Hz.
The most significant digit is addressed by columns S[13] and S[12] and the least

significant digit by S[1] and S[0]. Announciators for the total register, 4 tariff registers
and energy direction indication are available on the 'h' segments of the 6 least
significant digits. The display segments are addressed via the column outputs given
in the table below:

GND

DD

V

DR-00954

VOLTAGE
SENSOR
INPUT

IVP

SSV

CURRENT
SENSOR
INPUTS

IIN

IIP

SS

V

DD

SS

V

V

V

DD

A

V

A

I

SA9110A

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Digit Column R[0] R[1] R[2] R[3]

10

-1

S[0] Total c b a

LSD S[1] d e g f

10

0

S[2] T4 c b a
S[3] d e g f

10

1

S[4] T3 c b a
S[5] d e g f

10

2

S[6] T2 c b a
S[7] d e g f

10

3

S[8] T1 c b a
S[9] d e g f

10

4

S[10] Dir c b a
S[11] d e g f

10

5

S[12] h c b a

MSD S[13] d e g f

COLUMNS

S[12]S[13]

DR-00955

T4

S[3]

h

..

bf

g

e

d

c

4

a

.

6

TOTAL

S[2]

S[1]

S[0]

.

.

.

7

R[0]

R[1]

R[2]

R[3]

BACKPLANES

The kWh values of the LCD display digits, are given in the table below. The
resolution of the Least Significant Digit is normally programmed to 0.1kWh:

10

5

10

4

10

3

10

2

10

1

10010

-1

kWh

LCD Layout

The LCD display is given in the diagram below:

LCD Segment Address Table

SA9110A

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Programmable slope divider

* At rated conditions
The display is incremented after every 64th pulse on SDO.

Display Resolution

From the above formula for fp it can be derived that the slope constant, Ks, is given
by the following expression:-

Ks = (626 * 3600 * 1000 * E

KWh

) / ( 3 * V

L

*

IL)

Where E

kWh

= energy for 1 Display increment in kWh

V

L

= rated line voltage

I

L

= rated line current

This formula is valid only if 16µA flows into each of the current sense inputs for rated
line current (IL) and 14µA flows into the voltage sense inputs for rated line voltage
(VL).

4. Device Programming

The SA9110A contains on-chip registers which enables the meter manufacturer to
store various data:

Slope Adjustment

The slope of the device may be adjusted by programming a slope constant (KS) into
the device during calibration. The output frequency at SDO (fP) is calculated by
means of the following formula:

fP = 11.16

*

FOSC

*

40062.5
*

(II1 * IV1) + (II2 * IV2) + (II3 * IV3)

3.5795MHz K

S

3 * I

R

2

Where

FOSC = Oscillator frequency (2MHz ...... 4MHz)

I

I1, II2

, I

I3

= Input current for current sensor input (16µA at rated line current)
IV1, IV2, IV3= Input current for voltage sensor input (14µA at rated line voltage)
I

R

= Reference current (typically 50µA)
K

S

= Slope constant (1025 ... 16384)

(The default value is 11389)

By changing the slope of the device the resolution of the LCD together with the pulse
rate on SDO may be changed by up to an order. The block diagram below illustrates
the display update rate.

40062.5*

Pulses / s

DR-00956

1 / K

s

1 / 64

f

p

Display

Increment

SA9110A

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Offset Adjustment

The precision of this device does not require any offset adjustment for Class 1
metering. This facility has been provided to compensate for poor PCB layout or
circumstances requiring precision well beyond a Class 1 rating.

The offset of the device may be adjusted by programming a different offset into the
device during calibration. To calaculate the offset the following procedure should
be followed:

Measure the linearity error at the current where offset correction is needed.

KO =

IM * E

RR

IR * 6 * 10

-6

Where IM = Measured current on the current sensor

IR = Rated current on the current sensor
E

RR

= Error ratio between the device and the Wh standard

KO = Offset constant (-127 ... 127)

Note that KO must be programmed as a integer value.

Meter/Manufacturers Identification Data

A total of eleven 4 bit words are available to store relevant data such as the meter
and manufacturer identification codes. For the optical interface protocol, the 4-bit
words are converted to 8-bit words (ASCII-format).

Writing to RAM

The memory is configured as ten 32 bit words. The programming data must be
written to the device as a bitstream containing a total of 320 bits. ROM-locations
will not be overwritten.

Word Bit Function Description

number number

1 31..28 Sign of Register 1 A '1' indicates a negative register value
1 27..0 Register 1 Contents of register 1 in binary coded decimal
2 31..28 Sign of Register 2 A '1' indicates a negative register value
2 27..0 Register 2 Contents of register 2 in binary coded decimal
3 31..28 Sign of Register 3 A '1' indicates a negative register value
3 27..0 Register 3 Contents of register 3 in binary coded decimal
4 31..28 Sign of Register 4 A '1' indicates a negative register value
4 27..0 Register 4 Contents of register 4 in binary coded decimal
5 31..28 Sign of Register A '1' indicates a negative register value

'Total'

SA9110A

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Word Bit Function Description

number number

5 27..0 Register 'Total' Registers 1, 2, 3 and 4 are added and stored in the

register 'Total'
6 31..16 R OM Don't care
6 15..0 Manufacturers 16 bits are available for the manufacturer of the

Identification metering system as a system identification
7 31..28 R OM Don't care
7 27..0 System 28 bits are available for the manufacturer of the

Identification metering system as a system identification
8 31..0 ROM Don't care
9 31 Programmed slope Programmed slope select bit must be set if the

select default slope in ROM is not used
9 30..25 R OM Don't care
9 24-22 SAMES defined Bits must be set to 0 for correct functionality

register
9 21 Sign of offset By setting the sign bit a negative value is indicated
9 20..14 Offset Offset of the device in binary
9 13 Sign of slope By setting the sign bit a negative value is indicated
9 12..0 Slope Slope of the device in binary. (default = 11389)

10 31..0 ROM Don't care

The first bit of the programming data is written to word number 1, bit 31. The last
bit is written to word number 10, bit 0.

Programming procedure:

The PGM pin is pulled low and the PCLK pin should be clocked with an external
clock. The programming data on the PDTA pin must be stable during the rising edge
of the clock signal on PCLK.

The clock signal on PCLK should not exceed 200 kHz and does not have to be
synchronised with the oscillator frequency (FOSC).

Programming mode is interrupted if PGM goes high.

PDTA
BIT-N0

WORD-NO

DR-00957

29
1

31 30
11 1

28 27
1

PCLK

PGM

0
10

24
111

26 25 23

1

SA9110A

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The 4 tariff registers as well as the total register may be sequentially displayed by
activating the Push Button (PB). The minimum Push Button make time is 5mS. The
contents of the register selected for display is retained on the display for a period
of 10 seconds, provided that the push button is not activated during this period. After
the 10 seconds has elapsed, the display defaults to the "active" register defined by
the status of the SR[0] and SR[1] inputs.

The register selected for display via the push button (PB) is indicated by the relevant
announciator.

Memory Reset

In programming mode (while PGM is pulled low) if PCLK is left floating and PDTA=0,
the internal clock of the SA9110A will ensure that default values are set. For default
conditions all of the RAM locations are set to 0 and the value of the slope is set to

11389.

The minimum time period for a complete reset cycle is determined by:

t

min

= 322 *

64
FOSC

Where FOSC = Oscillator frequency (2MHz.....4MHz)

If the recommended crystal frequency of 3.5795MHz is used, this will result in a
minimum reset time of 5.8ms.

The specified signal levels on pins PGM, PCLK and PDTA must remain stable for
the entire reset cycle period.

5. Tariff Registers

A multiple tariff facility is provided on-chip by means of 4 tariff registers, which are
externally selectable via the SR[0] and SR[1] inputs. The registers may be selected
by programming the SR[0] and SR[1] inputs as follows:

SR[1] SR[0] Register

0 0 Register 1
0 1 Register 2
1 0 Register 3
1 1 Register 4

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8. Electrostatic Discharge (ESD) Protection

The SA9110A integrated circuits inputs/outputs are protected against ESD.

9. Power Consumption

The power consumption rating of the SA9110A integrated circuit is less than 40mW
with a 5V supply.

6. Optical Interface

The SA9110A device contains an interface for automatic meter reading, according
to the IEC1107 Mode D standard. The IEC1107 Mode D is a single baud rate of

2400. For the optical interface protocol, the 4-bit words are converted to 8-bit words
(ASCII-format).
After initiation of a serial transmission by pulling PB (pin 66) low, the data format
transmitted on SDO, is given below:

Code Description

/ Start transmission
XXX ID
3 Baud rate identification
YYYYYYYY ID
<cr><lf><cr><lf> Data header
0(nnnnnnnn) Data of Reg. 1 (sign, 10e5, 10e4 ...10e0, 10e-1)
1(nnnnnnnn) Data of Reg. 2
2(nnnnnnnn) Data of Reg. 3
3(nnnnnnnn) Data of Reg. 4
4(nnnnnnnn) Data of Reg. 'Total' = Sum of registers 1 to 4
!<cr><lf><cr><lf> End transmission

7. Power Failure/Battery Backup

A battery backup facility is available on VBA. This feature is provided to ensure
retention of the information stored in the registers, in case of power breaks.

The VSS supply to the analog circuitry and digital circuitry has been separated. In
the event of a power failure, the supply to the analog circuitry falls to 0V. The digital
circuitry is switched to a power down mode, to minimise the supply current from an
external battery backup. During this procedure, the following events take place:

• All inputs are disabled

•All outputs are placed in high impedance mode

•The oscillator is inhibited

•The LCD driver is disabled

•The contents of the RAM is retained by means of an external power source.

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TYPICAL APPLICATION

In the Application Circuit (Figure 1), the components required for a three phase power
metering application are shown. Terminated current transformers are used for current
sensing.

The most important external components for the SA9110A integrated circuit are:
C7, C9, C10 and C11 are the outer loop capacitors for the integrated oversampling

A/D converters. The typical value of C7 is 2.2nF and the value of C9, C10 and C11 is
560pF.

The actual values determine the signal to noise and stability performance. The tolerances
should be within ± 10%.

C4, C5, C6 and C8 are the inner loop capacitors for the integrated oversampling A/D
converters. The typical value of C4, C5, C6 and C8 is 3.3nF. Values smaller than 0.5nF
and larger than 5nF should be avoided.

Terminated current sensors (current transformers) are connected to the current sensor
inputs of the SA9110A through current setting resistors (R8 ..R13).

The resistor values should be selected for an input current of 16µA

RMS

into the SA9110A,

at the rated line current.
The values of these resistors should be calculated as follows:

Phase 1:
R8 = R9 = (IL1/16µA

RMS

) * R18/2
Phase 2:
R10 = R11 = (IL2/16µA

RMS

) * R19/2
Phase 3:
R12 = R13 = (IL3/16µA

RMS

) * R20/2
Where I

LX

= Secondary CT current at rated conditions.

R18, R19 and R

20

= Current transformer termination resistors for the three phases.

R1 , R4 and R15 set the current for the phase 1 voltage sense input. R2 , R5 and R16 set
the current for phase 2 and R3 , R6 and R17 set the current for phase 3. The values should
be selected so that the input currents into the voltage sense inputs (virtual ground) are
set to 14µA

RMS

for nominal line voltage. Capacitors C1, C2 and C3 are for decoupling and

phase compensation.
R7 defines all on-chip bias and reference currents (IR). With R7 = 24kΩ, optimum

conditions are set. R7 may be varied within ± 10% for calibration purposes. Any changes
to R7 will affect the output quadratically (i.e: ∆R = +5%, ∆f = +10%).

XTAL is a colour burst TV crystal (f = 3.5795MHz) for the oscillator. The oscillator
frequency is divided down to 1.7897MHz on-chip to supply the digital circuitry and the
A/D converters.

SA9110A

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Figure 1: Application circuit using current transformers for current sensing.

38

67

SA9110A

IC - 1

C9

NL3L2

LOAD

L1

CT2

CT3

DR-00939

R20

R19

CT1

R18

C8

R9

C7

R13

R10

R11

R12

D1

24R825

26

C6

18

5V

C4

C5

192322

21

20

17

16

35322827 3129 30 33 34 36 37

R4

C1

C2

C3

R5R6

R1

R2

SUPPLY

R3

5V

C10

1011131215

14

R15

R16

59678 4 32168

C11

R7

R17

. .

NEGATIVE T1 T2 T3 T4 TOTAL

BAT

D2

C12

C14

R22

R21

45

4039 42 4341

44

5150494847

46

52

53

5V

. .. .

C13

. .. . . . . .

XTAL

LED

6566 626364 61

59

55

54

585756

60

R14

DISPLAY SELECT

TARIFF SELECT

PBUT

DIPSW

PDTA

5V

LCD

PCLK

R23

5V

PGM

SA9110A

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Parts List for Application Circuit: Figure 1

Item Symbol Description Detail

1 IC-1 SA9110AFA PLCC-68
2 XTAL Crystal, 3.5795 MHz Colour burst TV
3 R1 Resistor, 390k, 1%, ¼W Note 1
4 R2 Resistor, 390k, 1%, ¼W Note 1
5 R3 Resistor, 390k, 1%, ¼W Note 1
6 R4 Resistor, 24k, 1%, ¼W Note 1
7 R5 Resistor, 24k, 1%, ¼W Note 1
8 R6 Resistor, 24k, 1%, ¼W Note 1

9 R7 Resistor, 24k, 1%, ¼W
10 R8 Resistor Note 2
11 R9 Resistor Note 2
12 R10 Resistor Note 2
13 R11 Resistor Note 2
14 R12 Resistor Note 2
15 R13 Resistor Note 2
16 R14 Resistor, 820Ω, 1%, ¼W
17 R15 Resistor, 1M, 1%, ¼W Note 1
18 R16 Resistor, 1M, 1%, ¼W Note 1
19 R17 Resistor, 1M, 1%, ¼W Note 1
20 R18 Resistor Note 2
21 R19 Resistor Note 2
22 R20 Resistor Note 2
23 R21 Resistor, 820Ω, 1%, ¼W
24 R22 Resistor, 820Ω, 1%, ¼W
25 R23 Resistor, 470Ω
26 C1 Capacitor, electrolytic, 1µF, 16V Note 3
27 C2 Capacitor, electrolytic, 1µF, 16V Note 3
28 C3 Capacitor, electrolytic, 1µF, 16V Note 3
29 C4 Capacitor, 3.3nF
30 C5 Capacitor, 3.3nF
31 C6 Capacitor, 3.3nF
32 C7 Capacitor, 2.2nF
33 C8 Capacitor, 3.3nF
34 C9 Capacitor, 560pF
35 C10 Capacitor, 560pF
36 C11 Capacitor, 560pF
37 C12 Capacitor, 100nF
38 C13 Capacitor, 820nF Note 4
39 C14 Capacitor, 100nF
40 BAT Battery (1.2V)

SA9110A

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Parts List for Application Circuit: Figure 1 (Continued)

Item Symbol Description Detail

41 LED Light emmitting diode
42 D1 Diode, Shottkey

43 D2 Diode, 1N4148
44 DIPSW DIP swich, 2 poles
45 PBUT Push button

ORDERING INFORMATION

Part Number Package

SA9110AFA PLCC-68

Note 1 : Resistor values are dependant upon the rated mains voltage (230V in this case)
Note 2 :Resistor (R8, R9, R10, R11, R12 and R13) values are dependant upon the selected

values of the current transformer termination resistors R18, R19 and R20.

Note 3 :Capacitor values may be selected to compensate for phase errors caused by the

current transformers.

Note 4 :Capacitor (C13) to be positioned as close to supply pins (VDD & VSS) of IC-1, as

possible.

SA9110A

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without the express written consent of SAMES. The information contained herein is current as of the date of
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