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SA9602E

FEATURES

Pin and functionally compatible with the
SA9102E with reduced external
components

Performs unidirectional power and
energy measurement

Meets the IEC 521/1036 Specification
requirements for Class 1 AC Watt hour
meters

Protected against ESD

SINGLE PHASE UNIDIRECTIONAL POWER/ENERGY

METERING IC WITH INSTANTANEOUS PULSE OUTPUT

4448

PDS039-SA9602E-001

REV. D

17-06-97

Package: DIP-14

Total power consumption rating below
25mW

Adaptable to different types of current
sensors

Operates over a wide temperature range

Precision voltage reference on-chip

Different pulse rate options available

DESCRIPTION

The SAMES SA9602E is an enhancement of
the SA9102E, as no external capacitors are
required for the A/D converters.

The SAMES SA9602E Single Phase
unidirectional Power/Energy metering
integrated circuit generates a pulse rate output,
the frequency of which is proportional to the
power consumption. The SA9602E performs
the calculation for active power.

The method of calculation takes the power
factor into account.

Energy consumption can be determined by
the power measurement being integrated over
time.

This innovative universal single phase power/
energy metering integrated circuit is ideally
suited for energy calculations in applications
such as residential municipal metering and
factory energy metering and control.

The SA9602E integrated circuit is available in
both 14 and 20 pin dual-in-line plastic (DIP-14/
DIP-20), as well as 20 pin small outline (SOIC-
20) package types.

PIN CONNECTIONS

O S C1

DR-0108 8

O S C2

IIP

VR EF

T E ST

IIN

FO UT 1

IVP

T P 12

G N D

T P 11

FO UT 2

1 3

1 0

1 1

1 2

1 4

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Package: DIP-20

SOIC-20

BLOCK DIAGRAM

PIN CONNECTIONS

TP6

TEST

OSC 2

TP9

DR-01095

VREF

IIP

TP4

TP5

IIN

TP15

FOU T1

FOU T2

OSC 1

TP18

TP17

TP16

GN D

IVP

VOLTA GE

REF.

A NALOG

SIGNA L

PROCE-

SSING

G ND

IVP

D R-0 1 08 9

VREF

O SC1

OSC

IIP

IIN

POWER

INTEG-

RA TOR

O SC2

TIMING

POWER

FREQUENCY

FO UT1

FO UT2

SA9602E

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ELECTRICAL CHARACTERISTICS
(V

= 2.5V, V

= -2.5V, over the temperature range -10�C to +70�C

, unless otherwise

specified.)

Parameter

Symbol

Min

Typ

Max

Unit

Condition

Operating temperature

range

-25

+85

�C

Supply Voltage: Positive

2.25

2.75

Supply Voltage: Negative

-2.75

-2.25

Supply Current: Positive

Supply Current: Negative

Current Sensor Inputs (Differential)

Input Current Range

-25

+25

�A

Peak value

Voltage Sensor Input (Asymmetrical)

Input Current Range

-25

+25

�A

Peak value

Pins FOUT1, FOUT2

Output Low Voltage

= 5mA

Output High Voltage

-1

= -2mA

Pulse Rate FOUT1

1160

Specified linearity

0.5

3000

Min and max limits

FOUT2

/290

ABSOLUTE MAXIMUM RATINGS*

Parameter

Symbol

Min

Max

Unit

Supply Voltage

-V

-0.3

6.0

Current on any pin

-150

+150

Storage Temperature

STG

-40

+125

�C

Operating Temperature

-40

+85

�C

* Stresses above those listed under "Absolute Maximum Ratings" may cause permanent

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.

SA9602E

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ELECTRICAL CHARACTERISTICS (Continued)
(V

= 2.5V, V

= -2.5V, over the temperature range -10�C to +70�C

, unless otherwise

specified.)

Parameter

Symbol

Min

Typ

Max

Unit

Condition

Pin VREF

With R = 24k

Ref. Current

-I

�A

connected to V

Ref. Voltage

1.1

1.3

Referred to V

Oscillator

Recommended crystal:
TV colour burst crystal f = 3.5795 MHz

Note1:

Two additional bondout options of FOUT2 are available on request: f

/4 and

/16.

Extended Operating Temperature Range available on request.

PIN DESCRIPTION

14 Pin

20 Pin

Designation

Description

GND

Ground

Positive Supply Voltage

Negative Supply Voltage

IVP

Analog input for Voltage

IIN

Inputs for current sensor

IIP

OSC1

Connections for crystal or ceramic resonator

OSC2

(OSC1 = Input ; OSC2 = Output)

FOUT1

First pulse rate output

FOUT2

Second pulse rate output

VREF

Connection for current setting resistor

TEST

Test Pin. Tie to VSS for protection in case of HV
transients

TP5

Test Pin (Leave unconnected)

TP6

TP9

TP11

TP12

TP15

TP16

TP17

TP18

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FUNCTIONAL DESCRIPTION
The SA9602E is a CMOS mixed signal Analog/Digital integrated circuit, which performs
power/energy calculations across a power range of 1000:1, to an overall accurancy of
better than Class 1.

The SA9602E in both DIP-20 and SOIC-20 package options is a direct replacement for
the SA9102E with the advantage of no external loop capacitors.

The integrated circuit includes all the required functions for 1-phase power and energy
measurement such as two oversampling A/D converters for the voltage and current sense
inputs, power calculation and energy integration. Internal offsets are eliminated through
the use of cancellation procedures. The SA9602E generates pulses, the frequency of
which is proportional to the power consumption. Two frequency outputs (FOUT1 and
FOUT2) are available, with a third frequency option available on request. The pulse rate
follows the instataneous power consumption measured.

Power Calculation
In the Application Circuit (Figure 1), the voltage drop across the shunt will be between
0 and 16mV

RMS

(0 to 80A through a shunt resistor of 200�

). This voltage is

converted to a current of between 0 and 16�A

RMS

, by means of resistors R

and R

The current sense input saturates at an input current of �25�A peak.

For the voltage sensor input, the mains voltage (230VAC) is divided down through
a divider to 14V. The current into the A/D converter input is set at 14�A

RMS

at nominal

mains voltage, via resistor R4 (1M

)

In this configuration, with a mains voltage of 230V and a current of 80A, the output
frequency of the SA9602E power meter chip at FOUT1 (Pin 12) is 1.16kHz. In this
case 1 pulse will correspond to an energy consumption of 18.4kW/1160Hz =
15.9Ws.

The output frequency at FOUT2 is FOUT1 /290 (i.e. The frequency ouput at FOUT1
divided by 290).

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 A

and A

generate virtual

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

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Electrostatic Discharge (ESD) Protection
The SA9602E integrated circuit's inputs/outputs are protected against ESD .

Power Consumption
The power consumption rating of the SA9602E integrated circuit is less than 25mW.

Pulse Output Signals

The diagram below shows the behaviour of the instantaneous pulse output, FOUT1,
with respect to the power consumption.

DR-0 1 2 8 2

F OUT

V x I

POWER

MAINS

V O L T A G E
S EN SO R
IN P U T

IV P

D R - 0 1 0 9 0

S S

C U R R E N T
S EN SO R
IN P U TS

IIP

IIN

S S

VD D

S S

V D D

D D

G N D

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The output on pin FOUT is a pulse density signal representing the instantaneous power/
energy measurement. The minimum timing characteristics are shown in the following
diagram.

TYPICAL APPLICATIONS
In the Application Circuits (Figures 1 and 2), the components required for power metering
applications, are shown.

In Figure 1 a shunt resistor is used for current sensing. In this application, the circuitry
requires a +2.5V, 0V, -2.5V DC supply.

In the case of Figure 2, when using a current transformer for current sensing, a +5V, 0V
DC supply is sufficient.

The most important external components for the SA9602E integrated circuit are:

, R

and RSH are the resistors defining the current level into the current sense input. The

values should be selected for an input current of 16�A

RMS

into the SA9602E at maximum

line current.

Values for RSH of less than 200�

should be avoided.

= R

= (I

/16�A

RMS

) * R

Where

Line current

RSH

Shunt resistor/termination resistor

, R

and R

set the current for the voltage sense input. The values should be selected

so that the input current into the voltage sense input (virtual ground) is set to 14�A

RMS

defines all on-chip bias and reference currents. With R

= 24k

, optimum conditions

are set. R

may be varied within �10% for calibration purposes. Any change to R

will affect

the output quadratically (i.e.: R

= +5%, f

= +10%).

The formula for calculating the output frequency is given below:

11.16

* FOUTX *

FOSC

3.58MHz I

Where FOUTX

= Normal rated frequency (4Hz or 1160Hz)

71us min.

DR-01151

71us

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Parts List for Application Circuit: Figure 1

Item

Symbol

Description

Detail

IC-1

SA9602E

DIP-14

IC-2

Optocoupler 4N35

DIP-6

Diode, Silicon, 1N4148

ZD1

Diode, Zener, 2.4V, 200mW

ZD2

Diode, Zener, 2.4V, 200mW

XTAL

Crystal, 3.5795MHz

Colour burst TV

Resistor, 1% metal

Note 1

Resistor, 1% metal

Note 1

Resistor, 390k, (230VAC) 1%, metal

Resistor, 1M, 1/4W, 1%, metal

Resistor, 470

, 2W, 5%, carbon

Resistor, 24k, 1/4W, 1%, metal

Resistor, 680

, 1/4W, 1%

Resistor, 680

, 1/4W, 1%

R10

Resistor, 680

, 1/4W, 1%

Capacitor, 100nF

C10

Capacitor, 100nF

C11

Capacitor, 0.47�F, 250VAC, polyester

C13

Capacitor, 100�F

C14

Capacitor, 100�F

C15

Capacitor, 820nF

Note 2

RSH

Shunt Resistor

Note 3

Note 1: Resistor (R1 and R2) values are dependant upon the selected value of RSH.

Note 2: Capacitor (C15) to be positioned as close to Supply Pins (V

& V

) of IC-1 as

possible.

Note 3: See TYPICAL APPLICATIONS when selecting the value of RSH.

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Figure 2: Application Circuit using a Current Transformer for Current Sensing.

1
*

-
1

I
NAT

I
O

I
S

R CURRE

PPL

-
010

.
6V

SA9602E

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Parts List for Application Circuit: Figure 2

Item

Symbol

Description

Detail

IC-1

SA9602E

DIP-14

XTAL

Crystal, 3.5795MHz

Colour burst TV

RSH

Resistor

Note 1

Resistor, 1%, metal

Note 2

Resistor, 1%, metal

Note 2

Resistor, 390k, (230VAC), 1%, metal

Resistor, 1M, 1/4W, 1%, metal

Resistor, 24k, 1/4W, metal

Resistor, 24k, 1/4W, 1%, metal

Resistor, 2.2k, 1/4W, 1%, metal

Capacitor, 820nF

Note 3

C10

Capacitor, 100nF

C11

Capacitor

Note 4

Current transformer

Note 1:

See TYPICAL APPLICATIONS when selecting the value of RSH.

Note 2:

Resistor (R1and R2) values are dependant upon the selected value of RSH.

Note 3:

Capacitor (C9) to be positioned as close to Supply Pins (V

& V

) of IC-1,

as possible.

Note 4:

Capacitor (C11) selected to minimize phase error introduced by current
transformer (typically 1.5�F).

ORDERING INFORMATION

Part Number

Package

SA9602EPA

DIP-14

SA9602EPA

DIP-20

SA9602ESA

SOIC-20

Note:

When ordering, the Package Option should be specified along with the Part

Number.

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South African Micro-Electronic Systems (Pty) Ltd
P O Box 15888,

33 Eland Street,

Lynn East, 0039

Koedoespoort Industrial Area,

Republic of South Africa,

Pretoria,

Republic of South Africa

Tel:

012 333-6021

Tel:

Int +27 12 333-6021

Fax:

012 333-8071

Fax:

Int +27 12 333-8071

Disclaimer:

The information contained in this document is confidential and proprietary to South African

Micro-Electronic Systems (Pty) Ltd ("SAMES") and may not be copied or disclosed to a third party, in whole
or in part, without the express written consent of SAMES. The information contained herein is current as of
the date of publication; however, delivery of this document shall not under any circumstances create any
implication that the information contained herein is correct as of any time subsequent to such date. SAMES
does not undertake to inform any recipient of this document of any changes in the information contained herein,
and SAMES expressly reserves the right to make changes in such information, without notification,even if such
changes would render information contained herein inaccurate or incomplete. SAMES makes no representation
or warranty that any circuit designed by reference to the information contained herein, will function without
errors and as intended by the designer.

Any sales or technical questions may be posted to our e-mail address below:
energy@sames.co.za

For the latest updates on datasheets, please visit our web site:
http://www.sames.co.za

Электронный компонент: SA9602E