sames

1/14

SA9602H

FEATURES

Performs bidirectional power and
energy measurement

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

Protected against ESD

SINGLE PHASE BIDIRECTIONAL POWER/ENERGY

METERING IC WITH INSTANTANEOUS PULSE OUTPUT

7149

PDS039-SA9602H-001

REV.D

27-08-98

Total power consumption rating below
25mW

Adaptable to different types of current
sensors

Operates over a wide temperature range

Precision voltage reference on-chip

DESCRIPTION

The SAMES SA9602H is an enhancement of
the SA9102H, as no external capacitors are
required for the A/D converters. The SA9602H
has a higher output pulse rate than the
SA9102H.

The SAMES SA9602H Single Phase
bidirectional Power/Energy metering integrated
circuit generates a pulse rate output, the
frequency of which is proportional to the power
consumption. The SA9602H 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 SA9602H 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

Package: DIP-14

DR-01276

OSC1

OSC2

VREF

TEST

IIP

IIN

FOUT

IVP

TP12

GND

DIR

FMO

SA9602H

2/14

sames

Package: DIP-20

SOIC-20

BLOCK DIAGRAM

PIN CONNECTIONS

TP6

TEST

OSC2

TP9

D R - 0 1 2 7 7

VREF

IIN

IIP

TP4

TP5

FMO

DIR

OSC1

FOUT

GND

IVP

TP16

TP17

TEST2

VOLTAGE

REF.

OS C 2

ANALOG

SIGNA L

PROCE-

SSING

D R -0 1 2 7 8

G N D

IV P

V R E F

OS C 1

OSC

TE S T

IIP

IIN

TE S T 2

POWER

INTEG-

RATOR

TIMING

F M O

S S

D D

POWER

FREQUENCY

D IR

FOU T

SA9602H

sames

3/14

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.

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

�

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 FOUT, FOUT2
Output Low Voltage

= 5mA

Output High Voltage

-1

= -2mA

Pulse Rate FOUT

1160

Specified linearity

3000

Min and max limits

Pulse Width tp

71.55

�s

Positive Energy Flow

143.1

�s

Negative Energy Flow

SA9602H

4/14

sames

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

VREF

Connection for current setting resistor

TEST

Test Pin. Tie to VSS for protection against HV
transients and noise

OSC1

Connections for crystal or ceramic resonator

OSC2

(OSC1 = Input ; OSC2 = Output)

FOUT

Pulse rate output

DIR

Direction indication output

FMO

Rising edge of mains frequency

TP4

Test Pins (Leave unconnected)

TP5

TP6

TP9

TP12

TP16

TP17

TP18

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

Extended Operating Temperature Range available on request.

PIN DESCRIPTION

SA9602H

sames

5/14

FUNCTIONAL DESCRIPTION
The SA9602H 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 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 SA9602H generates pulses, the frequency of
which is proportional to the power consumption. The pulse rate follows the instataneous
power consumption measured. Direction information is also provided.

A voltage zero crossover signal, relevant to the positive going half cycle, is available on
pin FMO. This signal can be used to sychronise circuit breaker switching.

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 SA9602H power meter chip at FOUT is 1.16kHz. In this case 1 pulse
will correspond to an energy consumption of 18.4kW/1160Hz = 15.9Ws.

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.

SA9602H

6/14

sames

Electrostatic Discharge (ESD) Protection
The SA9602H integrated circuit's inputs/outputs are protected against ESD

Power Consumption
The power consumption rating of the SA9602H integrated circuit is less than 25mW.

Pulse Output Signals

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

D R - 0 1 2 8 2

F OU T

V x I

P O W E R

MA I N S

G ND

VD D

DR-01279

V O L T AG E
S E NS O R
I NP UT

IVP

S S

IIN

IIP

CURRE NT
S E NS O R
INP UT S

S S

V D D

D D

SA9602H

sames

7/14

The diagram below shows the behavior of the direction indicator, DIR, when energy
reversal takes place. The timing period for the DIR signal to change state, t

DIR

, will

be defined by the time it takes for the integrater to count down from its value at the
time of energy reversal. This is determined by the energy consumption rate.

The square wave signal on FMO indicates the polarity of the mains voltage.

Due to comparator offsets, the FMO low to high transition can occur within a
range as shown above. The time between succesive low to high transitions will
be equal to the mains voltage period.

D IR

D R - 0 1 2 8 3

D IR

D R -01 2 84

FM O

M A IN S

SA9602H

8/14

sames

, 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 (1160Hz)

FOSC

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

= Input current for current input (16�A

RMS

at rated)

= Input current for voltage input (14�A

RMS

at rated)

= Reference current

(typically 50�A)

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

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 SA9602H 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 SA9602H 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

SA9602H

10/14

sames

Parts List for Application Circuit: Figure 1

Item

Symbol

Description

Detail

IC-1

SA9602H

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%

R11

Resistor, 2.2K, 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

LED

Light Emitting Diode

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.

SA9602H

sames

11/14

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

-
1

H =

I
N

I
O

I
S

R C

URR

PPL

-
0

281

R2
=

SA9602H

12/14

sames

Parts List for Application Circuit: Figure 2

Item

Symbol

Description

Detail

IC-1

SA9602H

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

SA9602HPA

DIP-20

SA9602HSA

SOIC-20

SA9602HPA

DIP-14

Note:

When ordering, the Package Option must be specified along with the Part
Number.

SA9602H

14/14

sames

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

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

Электронный компонент: SA9602HSA