SA2002P Datasheet, PDF (1/14 Pages) Sames – Programmable Single Phase Kilowatt-hour Energy IC for Mechanical Counter Application

Programmable Single Phase Kilowatt-hour
Energy IC for Mechanical Counter
Application
SA2002P
sames
FEATURES
+ Provides a single chip solution for energy meters with a
mechanical display
+ No external crystal or resonator required
+ Precision on chip oscillator (<60ppm/°C drift)
+ Direct stepper motor/impulse counter drive
+ Calibration and setup stored on external EEPROM - no
trimpots required
+ Flexible programmable features
+ Unidirectional and bi-directional power and energy
measurement
+ Can measure AC or DC energy.
+ Meets the IEC 61036 Specification for Class 1 AC Watt
hour meters
+ Less than 1% error over a dynamic range of 1:1000
+ Protected against ESD
+ Total power consumption rating below 30mW
+ Adaptable to different types of sensors
+ Operates over a wide temperature range
+ Precision voltage reference on-chip (<100ppm/°C drift)
DESCRIPTION
The SAMES SA2002P provides a single chip solution for
single phase mechanical counter based energy meters. A
precision oscillator, that replaces an external crystal is
integrated on chip.
The SA2002P does not require any external trim-pots. All
required calibration and configuration data is read from a small
external EEPROM. The data stored in the EEPROM consists
of direction mode (unidirectional or bidirectional), calibration
data, meter rated conditions, LED pulse rate, counter pulse
width, counter resolution and creep threshold. A
programmable high frequency pulse output is available on the
LED output for meter calibration purposes.
The SA2002P single phase kWh metering integrated circuit
generates a pulse rate with a frequency proportional to the
power consumption. The SA2002P performs active power
measurement and takes the power factor into account.
The SA2002P integrated circuit is available in 16 pin dual-in-
line plastic (PDIP16) and small outline (SOIC16) package
types.
V_DD
V_SS
IIP
IIN
IVP
GND
ANALOG
SIGNAL
PROCESSING
POWER
INTEGRATOR
VOLTAGE
REF.
POWER
TO
PULSE RATE
OSC TIMING
IIC BUS
INTERFACE
SPEC-0087 (REV. 5)
DR-01607
VREF
TEST
Figure 1: Block diagram
SCL SDA
1/14
DIRO
LED
MOP
MON
FMO
RLOAD
05-09-02