SA9602E
SINGLE PHASE UNIDIRECTIONAL POWER/ENERGY
METERING IC WITH INSTANTANEOUS PULSE OUTPUT
FEATURES
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Pin and functionally compatible with the
SA9102E with reduced external
components
n
Performs unidirectional power and
energy measurement
n
n
sames
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
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n
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Meets the IEC 521/1036 Specification
requirements for Class 1 AC Watt hour
meters
Protected against ESD
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PIN CONNECTIONS
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.
4448
IIN
IIP
VR EF
T E ST
V DD
1
2
3
4
5
1 4
GN D
13
12
11
10
9
8
IVP
T P 12
T P 11
V SS
FO UT 2
FO UT 1
OS C2
6
OS C1
7
DR-0108 8
Package: DIP-14
1/14
PDS039-SA9602E-001
REV. D
17-06-97
SA9602E
PIN CONNECTIONS
IIN
IIP
VREF
TP4
TP5
TP6
TEST
V DD
1
2
3
4
5
6
7
8
20
GN D
19
IVP
18
TP18
17
TP17
16
TP16
TP15
14
V SS
13
12
15
FOU T2
9
TP9
OSC 2
10
FOU T1
11
OSC 1
DR-01095
Package: DIP-20
SOIC-20
BLOCK DIAGRAM
V DD
V SS
IIP
POWER
IIN
FOUT1
A NALOG
SIGNA L
PROCE-
INTEG-
RA TOR
POWER
TO
FREQUENCY
FOUT2
VOLTA GE
REF.
IVP
GND
SSING
OSC
TIMING
D R-0 1 08 9
VREF
OSC1
OSC2
2/14
sames
SA9602E
ABSOLUTE MAXIMUM RATINGS*
Parameter
Symbol
Supply Voltage
V
DD
-V
SS
Current on any pin
I
PIN
Storage Temperature
Operating Temperature
T
STG
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
Symbol
Min
Typ
Max
Unit
Condition
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
Current Sensor Inputs (Differential)
Input Current Range
I
II
-25
+25
µA
Peak value
Voltage Sensor Input (Asymmetrical)
Input Current Range
Pins FOUT1, FOUT2
Output Low Voltage
Output High Voltage
Pulse Rate FOUT1
FOUT2
1
sames
I
IV
V
OL
V
OH
f
P
f
P2
-25
+25
V
SS
+1
V
DD
-1
10
0.5
f
P
/290
3/14
µA
V
V
Hz
Hz
Peak value
I
OL
= 5mA
I
OH
= -2mA
Specified linearity
Min and max limits
1160
3000
SA9602E
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
Note1:
#
Two additional bondout options of FOUT2 are available on request: f
p
/4 and
f
p
/16.
Extended Operating Temperature Range available on request.
PIN DESCRIPTION
14 Pin
14
5
10
13
1
2
7
6
8
9
3
4
20 Pin
20
8
14
19
1
2
11
10
12
13
3
7
5
6
9
11
12
15
16
17
18
4/14
Designation
GND
V
DD
V
SS
IVP
IIN
IIP
OSC1
OSC2
FOUT1
FOUT2
VREF
TEST
TP5
TP6
TP9
TP11
TP12
TP15
TP16
TP17
TP18
sames
Description
Ground
Positive Supply Voltage
Negative Supply Voltage
Analog input for Voltage
Inputs for current sensor
Connections for crystal or ceramic resonator
(OSC1 = Input ; OSC2 = Output)
First pulse rate output
Second pulse rate output
Connection for current setting resistor
Test Pin. Tie to VSS for protection in case of HV
transients
Test Pin (Leave unconnected)
SA9602E
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.
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 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
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.
2.
sames
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