ILA19002
Korzhenevskogo 12, Minsk, 220108, Republic of
Belarus
Fax: +375 (17) 278 28 22,
Phone: +375 (17) 278 07 11, 212 24 70, 212 24 61,
212 69 16
E-mail: office@bms.by
URL: www.bms.by
1
SINGLE PHASE BIDIRECTIONAL POWER/ENERGY
METERING IC WITH INSTANTANEOUS PULSE OUTPUT
FEATURES
Performs bidirectional power
and energy measurement
Meets the IEC 521/1036
Specification requirements for
Class 1 AC Watt hour meters
Protected against ESD
Total power consumption rating
below 25 mW
Adaptable to different types of
current sensors
Operates over a wide temperature
range
Precision voltage reference on-chip
FUNCTIONAL DESCRIPTION:
The ILA19002 Single Phase Bidirectional Power/Energy metering integrated circuit generates
a pulse rate output, the frequency of which is proportional to the power consumption. The
ILA19002 performs the calculations of active power.
The method of calculation takes the power factor into account.
Energy consumption is determined by the power measurement being integrated over time.
This universal single phase bidirectional power/energy metering integrated circuit is ideally
suited for energy calculation in applications such as residential municipal metering and factory
energy metering and control.
The ILA19002 Single Phase Bidirectional Power/Energy metering integrated circuit is a
CMOS mixed signal Analog/Digital integrated circuit, which performs power/energy
calculations over a range of 1000:1, to an overall accuracy 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 ILA19002 Single Phase Bidirectional Power/Energy metering integrated circuit generates
pulses, the frequency of which is proportional to the power consumption. The pulse rate
follows the instantaneous 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 synchronise circuit breaker switching.
IC is available in both 14 and 20 pin dual-in-plastic (DIP-14/DIP-20), as well as 20 pin small
outline (SOIC-20) package types.
ILA19002
Korzhenevskogo 12, Minsk, 220108, Republic of
Belarus
Fax: +375 (17) 278 28 22,
Phone: +375 (17) 278 07 11, 212 24 70, 212 24 61,
212 69 16
E-mail: office@bms.by
URL: www.bms.by
2
BLOCK DIAGRAM
POWER
TO
FREQU-
ENCY
POWER INTEGRATOR
ANALOG
SIGNAL
PROCESSING
OSC
TIMING
VOLTAGE
REF
.
V
SS
V
DD
IVP
FOUT
IIP
IIN
FMO
DIR
OSC1 OSC2
GND
VREF
ABSOLUTE MAXIMUM RATINGS
*
Parameter Symbol
Min
Max
Unit
Supply Voltage
V
DD
-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
-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 conditions above those indicated in the operation sections of this
specification, is not implied. Exposure to Absolute Maximum Ratings for extended periods
may affect device reliability.
ILA19002
Korzhenevskogo 12, Minsk, 220108, Republic of
Belarus
Fax: +375 (17) 278 28 22,
Phone: +375 (17) 278 07 11, 212 24 70, 212 24 61,
212 69 16
E-mail: office@bms.by
URL: www.bms.by
3
ELECTRICAL CHARACTERISTICS
(V
DD
=2.5V, V
SS
=-2.5V, over the temperature range -10C to +70C, unless otherwise specified.)
Parameter
Symbol Min
Typ
Maxf Unit Condition
Operating Temperature
Ranges
T
O
-25
+85
0
C
Supply Voltage: Positive V
DD
2.25
2.75 V
Supply Voltage: Negative V
SS
-2.75
-2.25 V
Supply Current: Positive I
DD
5
6
mA
Supply Current: Negative I
SS
5
6
mA
Current Sensor Inputs
(Differential)
Input Current Range
I
II
-25
+25
A Peak value
Voltage Sensor Inputs
(Asymmetrical )
Input Current Range I
IV
-25
+25
A Peak value
Pins FOUT, FOUT2
Output Low Voltage
Output High Voltage
V
OL
V
OH
V
DD
-1
V
SS
+
1
V
V
I
OL
=5 mA
I
OH
=-2 mA
Pulse Rate FOUT
fp
0
0
1160
3000
Hz
Hz
Specified linearity
Min and max limits
Pulse Width tp
t
PP
t
PN
71:55
143.1
s
s
Positive Energy Flow
Negative Energy Flow
Pin VREF
Ref. Current
Ref. Voltage
-I
R
V
R
45
1.1
50
55
1.3
A
V
With R = 24 k
connected to V
SS
Referred to V
SS
Oscillator Recommended
crystal:
TV colour burst crystal, f=3.5795 MHz
ILA19002
Korzhenevskogo 12, Minsk, 220108, Republic of
Belarus
Fax: +375 (17) 278 28 22,
Phone: +375 (17) 278 07 11, 212 24 70, 212 24 61,
212 69 16
E-mail: office@bms.by
URL: www.bms.by
4
PIN DESCRIPTION
14 Pin 20 Pin
Designation
Description
14 20
GND Ground
5 8
V
DD
Positive Supply Voltage
10 14
V
SS
Negative Supply Voltage
13
19
IVP
Analog Input for Voltage
1
1
IIN
Inputs for current sensor
2 2
IIP
3
3
VREF
Connection for current setting resistor
4
7
TEST
Test Pin. Tie to V
SS
for protection against HV
transients and noise
7
11
OSC1
Connections for crystal or ceramic resonator
6
10
OSC2
(OSC1=Input; OSC2=Output)
8
12
FOUT
Pulse rate output
9
13
DIR
Direction indication output
11
15
FMO
Rising edge of mains frequency
4
TP4
Test pins (Leave unconnected)
5
TP5
6
TP6
9
TP9
12
TP12
16 TP16
17 TP17
18 TP18
Note: arrangement of pins according to analog SA9602H (Sames)
ILA19002
Korzhenevskogo 12, Minsk, 220108, Republic of
Belarus
Fax: +375 (17) 278 28 22,
Phone: +375 (17) 278 07 11, 212 24 70, 212 24 61,
212 69 16
E-mail: office@bms.by
URL: www.bms.by
5
FUNCTIONAL DESCRIPTION
The ILA19002 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 ILA19002 generates pulses, the frequency of which is
proportional to the power consumption. The pulse rate follows the instantaneous 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 synchronise 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 200
). This voltage is
converted to a current of between 0 and 16A
RMS
, by means of resistors R
1
and R
2
.
The current sense input saturates at an input current of 25A 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 14A
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 ILA19002 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.
3. Electrostatic Discharge (ESD) Protection
The ILA19002 integrated circuit's inputs/outputs are protected against ESD
4. Power Consumption
The power consumption rating of the ILA19002 integrated circuit is less than 25mW.
5. Pulse Output Signals
The diagram below shows the behavior of the instantaneous pulse output, FOUT,
with respect to the power consumption.
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