SA2002D Datasheet, PDF (1/10 Pages) Sames – Single Phase Kilowatt-hour Metering IC for Mechanical Display Applications

Single Phase Kilowatt-hour Metering IC for
Mechanical Display Applications
SA2002D
Sames
FEATURES
+ Provides a single chip solution for energy meters having a
mechanical display
+ No external crystal or resonator required
+ Direct stepper motor / impulse counter drive
+ Unidirectional and bi-directional energy measurement
+ Meets the IEC 521/1036 Specification requirements for
Class 1 AC Watt hour meters
+ Configurable for different meter ratings
+ Adaptable to different types of current sensors
+ Precision voltage reference on chip
+ Operates over a wide temperature range
+ Low power consumption
DESCRIPTION
The SAMES SA2002D provides a single chip solution for
single phase energy meters. Very few external components
are required and it has direct drive capability for
electromechanical counters. The SA2002D does not required
an external crystal. A precision oscillator, which is supplies the
circuitry with a stable frequency, is integrated on chip.
Programmable inputs allow the meter manufacturer to
configure the SA2002D for different meter ratings without
having to change the stepper motor or impulse counter gear
ratio. A high frequency pulse output is available at the LED
output for meter calibration purposes. The SA2002D includes
an anti-creep feature.
The SA2002D can be configured for positive, negative or bi-
directional energy measurement.
The SA2002D Single Phase kWh metering integrated circuit
generates a pulse rate output, the frequency of which is
proportional to the power consumption. The SA2002D
performs the calculation for active power. The method of
calculation takes the power factor into account.
The SA2002D integrated circuit is available in 20 pin dual-in-
line plastic (PDIP20), as well as 20 pin small outline (SOIC20)
package types.
VDD
DIRI DIROFAST
IIP
IIN
IVP
AGND
ANALOG
SIGNAL
PRO-
CESSING
POWER
INTE-
GRATOR
OSC TIMING
REFERENCE
&
BIAS
LED-
PULSE
COUNTER
DRIVER
Dr-01566
VREF
VSS CNF
R0 R1 R2
Figure 1: Block diagram
SPEC-0024 (REV. 4)
1/10
LED
MOP
MON
18-11-02