FEATURES
+ Provides direct interface to mechanical counters
+ Calibration and setup stored on external EEPROM - no
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
samessames
Programmable Single Phase Energy Metering
IC with Tamper Detection
SA2007P
1/12
SPEC-0074 (REV. 2)
16-01-01
+ 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.
Figure 1: Block diagram
IIN1
IIP1
IIP2
IVP
ANALOG
SIGNAL
PROCESSING
AND
POWER
CALCULATION
COM-
PARATOR
POWER
TO
PULSE
RATE
IIC
BUS
INTERFACE
VOLTAGE
REF.
OSC
ELT
VSSVDD
SEL1
DIRO
LED
MOP
MON
TEST
VREF
Dr-01594
TCLK SDASCL
POWER 1 (DIGITAL)
POWER 2 (DIGITAL)
GND
IIN2
RLOAD
PRELIMINARY
