SA9602H
SINGLE PHASE BIDIRECTIONAL POWER/ENERGY
METERING IC WITH INSTANTANEOUS PULSE OUTPUT
FEATURES
s
Performs bidirectional power and
energy measurement
s
Meets the IEC 521/1036 Specification
requirements for Class 1 AC Watt hour
meters
s
Protected against ESD
s
sames
s
s
s
Total power consumption rating below
25mW
Adaptable to different types of current
sensors
Operates over a wide temperature range
Precision voltage reference on-chip
PIN CONNECTIONS
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.
IIN
1
The SAMES SA9602H Single Phase
IIP
2
bidirectional Power/Energy metering integrated
circuit generates a pulse rate output, the
VREF
3
frequency of which is proportional to the power
TEST
4
consumption. The SA9602H performs the
calculation for active power.
5
V DD
The method of calculation takes the power
OSC2
6
factor into account.
OSC1
7
Energy consumption can be determined by
the power measurement being integrated over
DR-01276
time.
This innovative universal single phase power/
energy metering integrated circuit is ideally
Package: DIP-14
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.
7149
PDS039-SA9602H-001
REV.D
14
13
12
11
10
9
8
GND
IVP
TP12
FMO
V SS
DIR
FOUT
1/14
27-08-98
SA9602H
PIN CONNECTIONS
IIN
IIP
VREF
TP4
TP5
TP6
TEST
V DD
TP9
OSC2
1
2
3
4
5
6
7
8
9
10
20
19
18
17
16
15
GND
IVP
TP17
TEST2
TP16
FMO
14
V SS
13
12
11
DIR
FOUT
OSC1
D R -01277
Package: DIP-20
SOIC-20
BLOCK DIAGRAM
V DD
V SS
TE S T
TE S T2
IIP
POWER
IIN
FOU T
D IR
ANALOG
SIGNA L
PROCE-
INTEG-
RATOR
POWER
TO
FREQUENCY
VOLTAGE
REF.
IV P
GND
SSING
OSC
TIMING
FM O
D R -0 1 2 7 8
V RE F
OS C 1
OS C 2
2/14
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SA9602H
ABSOLUTE MAXIMUM RATINGS*
Parameter
Symbol
Supply Voltage
V
DD
-V
SS
Current on any pin
I
PIN
Storage Temperature
T
STG
Operating Temperature
T
O
Min
-0.3
-150
-40
-40
Max
6.0
+150
+125
+85
Unit
V
mA
°C
°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
DD
= 2.5V, V
SS
= -2.5V, over the temperature range -10°C to +70°C
#
, unless otherwise
specified.)
Parameter
Operating temperature
range
#
Supply Voltage: Positive
Supply Voltage: Negative
Supply Current: Positive
Supply Current: Negative
T
O
V
DD
V
SS
I
DD
I
SS
-25
2.25
-2.75
5
5
+85
2.75
-2.25
6
6
°C
V
V
mA
mA
Symbol Min
Typ
Max Unit Condition
Current Sensor Inputs (Differential)
Input Current Range
I
II
-25
+25
µA
Peak value
Voltage Sensor Input (Asymmetrical)
Input Current Range
Pins FOUT, FOUT2
Output Low Voltage
Output High Voltage
Pulse Rate FOUT
Pulse Width tp
sames
I
IV
V
OL
V
OH
f
P
t
PP
t
pn
-25
+25
V
SS
+1
1160
3000
71.55
143.1
µA
V
V
Hz
Hz
µs
µs
Peak value
I
OL
= 5mA
I
OH
= -2mA
Specified linearity
Min and max limits
Positive Energy Flow
Negative Energy Flow
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V
DD
-1
0
0
SA9602H
ELECTRICAL CHARACTERISTICS (Continued)
(V
DD
= 2.5V, V
SS
= -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 = 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
Oscillator
Recommended crystal:
TV colour burst crystal f = 3.5795 MHz
#
Extended Operating Temperature Range available on request.
PIN DESCRIPTION
14 Pin
14
5
10
13
1
2
3
4
7
6
8
9
11
20 Pin
20
8
14
19
1
2
3
7
11
10
12
13
15
4
5
6
9
16
17
18
Designation
GND
V
DD
V
SS
IVP
IIN
IIP
VREF
TEST
OSC1
OSC2
FOUT
DIR
FMO
TP4
TP5
TP6
TP9
TP12
TP16
TP17
TP18
Description
Ground
Positive Supply Voltage
Negative Supply Voltage
Analog input for Voltage
Inputs for current sensor
Connection for current setting resistor
Test Pin. Tie to VSS for protection against HV
transients and noise
Connections for crystal or ceramic resonator
(OSC1 = Input ; OSC2 = Output)
Pulse rate output
Direction indication output
Rising edge of mains frequency
Test Pins (Leave unconnected)
12
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SA9602H
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.
1.
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 200µΩ). This voltage is
converted to a current of between 0 and 16µA
RMS
, by means of resistors R
1
and R
2
.
The current sense input saturates at an input current of ±25µA 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 14µA
RMS
at nominal
mains voltage, via resistor R4 (1MΩ).
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.
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 A
I
and A
V
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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