Programmable Single Phase Energy Metering
IC with Tamper Detection
SA2007P
FEATURES
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Provides direct interface to mechanical counters
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Calibration and setup stored on external EEPROM - no
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trimpots required
Monitors both Live and Neutral for tamper detection
Flexible programmable features
Meets the IEC 521/1036 Specification for Class 1 AC Watt
hour meters
sames
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Total power consumption rating below 50mW
Adaptable to different types of sensors
Operates over a wide temperature range
Precision voltage reference on-chip
Precision oscillator on chip
DESCRIPTION
The SAMES SA2007P is a single phase bi-directional energy
metering integrated circuit. It provides a cost effective solution
for energy meters with electro-mechanical displays, such as
stepper motors and impulse counters. A precision oscillator,
that replaces an external crystal is integrated on chip.
Two current sensor inputs allow the measurement of energy
consumption on both the live and neutral lines.
Direction detection of energy flow as well as other common
tamper conditions are flagged.
The power consumption on both the live and neutral are
continuously measured and the larger of the two is selected for
energy metering.
The SA2007P drives the calibration LED, the indicator LEDs
and the electro-mechanical counter directly.
The SA2007P does not require any external trim-pots. All
required calibration and configuration data is read from a small
external EEPROM.
The SA2007P integrated circuit is available in 20 pin dual-in-
line plastic (DIP-20) and small outline (SOIC-20) package
types.
VDD VSS
IIN1
IIP1
IIN2
IIP2
IVP
GND
ANALOG
SIGNAL
PROCESSING
AND
POWER
CALCULATION
POWER 1 (DIGITAL)
ELT
POWER 2 (DIGITAL)
COM-
PARATOR
SEL1
VOLTAGE
REF.
OSC
IIC
BUS
INTERFACE
POWER
TO
PULSE
RATE
DIRO
LED
MOP
MON
Dr-01594
VREF
TCLK
SCL SDA RLOAD
TEST
Figure 1: Block diagram
SPEC-0074 (REV. 2)
1/12
PRELIMINARY
16-01-01
SAMES [ SAMES ]
