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PDF SA2002HPA Data sheet ( Hoja de datos )

Número de pieza SA2002HPA
Descripción Single Phase Bi-directional Power / Energy Metering IC with Instantaneous Pulse Output
Fabricantes Sames 
Logotipo Sames Logotipo



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No Preview Available ! SA2002HPA Hoja de datos, Descripción, Manual

Single Phase Bi-directional Power / Energy
Metering IC with Instantaneous Pulse Output
SA2002H
sames
FEATURES
+ Functionally compatible with the SA9602H with reduced
external components
+ Bi-directional power and energy measurement
+ Meets the IEC 521/1036 Specification requirements for
Class 1 AC Watt hour meters
+ Protected against ESD
DESCRIPTION
The SAMES SA2002H is an enhancement of the SA9602H, as
the circuit contains the oscillator on chip.
The SAMES SA2002H single phase bi-directional
power/energy metering integrated circuit generates a pulse
rate output with a frequency proportional to the power
consumption.
The SA2002H performs a 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.
+ Total power consumption rating below 25mW
+ Adaptable to different types of current sensors
+ Operates over a wide temperature range
+ Precision voltage reference on-chip
+ Precision oscillator on-chip
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 SA2002H integrated circuit is available in 8, 14 and 20 pin
dual-in-line plastic (DIP) as well as 16 and 20 pin small outline
(SOIC) package types.
VDD
VSS
IIP
IIN
IVP
GND
ANALOG
SIGNAL
PROCESSING
POWER
INTEGRATOR
VOLTAGE
REF.
POWER
TO
FREQUENCY
OSC
TIMING
DR-01147
VREF
*FMO and DIR not availble in DIP-8 package type
Figure 1: Block diagram
SA2002H (REV. 5)
1/12
FOUT
DIR*
FMO*
17-08-00

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SA2002HPA pdf
SA2002H
sames
FUNCTIONAL DESCRIPTION
The SA2002H is a CMOS mixed signal Analog/Digital
integrated circuit, which performs power/energy calculations
across a power 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 SA2002H generates pulses, the frequency of
which is proportional to the measured power consumption.
One frequency output (FOUT) is available. The pulse rate
follows the instantaneous power consumption measured.
POWER CALCULATION
In the application circuit (figure 6), the voltage drop across the
shunt will be between 0 and 16mVRMS (0 to 80A through a shunt
resistor of 200µW) The voltage is converted to a current of
between 0 and 16uARMS, by means of resistors R1 and R2. The
current sense inputs saturates at an input current of ±25µA
peak.
For the voltage sensor input, the mains voltage (230VAC) is
divided down through a divider (R3, R4 and P1) to 14VRMS. The
current into the A/D converter input is set at 14µARMS at nominal
mains voltage, via resistor R5 (1MW). P1 may be varied for
calibration purposes.
In this configuration, with a mains voltage of 230V and a
current of 80A, the output frequency measured on the FOUT
pin is 1360Hz. In this case one pulse on FOUT correspond to
an energy consumption of 18.4kW/1360Hz = 13.53Ws.
ANALOG INPUT CONFIGURATION
The input circuitry of the current and voltage sensor inputs is
illustrated in figure 7. These inputs are protected against
electrostatic discharge through clamping diodes. The
feedback loops from the outputs of the amplifiers AI and AV
generate virtual shorts on the signal inputs. Exact duplications
of the input currents are generated for the analog signal
processing circuitry.
VDD
N
Supply
L
GND
VSS
RSH R1
R2
U1 VDD
IIN VDD
IIP
R3 R5
IVP FOUT
Pulse output
R4 GND
GND
DIR
FMO
Fwd/Rev. Energy
Zero crossing
VREF VSS
N SA2002H
R6
P1
L
GND
DR-01587
VSS
Figure 6: Application circuit
VDD
IIP
CURRENT
SENSOR
INPUTS
VSS
VDD
IIN
VSS
VDD
IVP
VOLTA GE
SENSOR
INPUT
VSS
AI
AV
DR-01148
GND
Figure 7: Internal analog input configuration
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SA2002HPA arduino
SA2002H
NOTES:
sames
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