FEATURES
+ Provides direct interface to mechanical counters
+ Monitors Live and Neutral for tamper detection
+ Performs bidirectional energy measurement
+ Various setup modes selectable
+ Meets the IEC 521/1036 Specification for Class 1 AC Watt
hour meters
samessames
Single Phase Power/Energy Metering IC with
Tamper Detection
SA2007M
1/10
SPEC-0075 (REV. 2)
16-01-01
+ Total power consumption rating below 30mW
+ Adaptable to different types of sensors
+ Operates over a wide temperature range
+ Precision voltage reference on-chip
+ Precision oscillator on chip
DESCRIPTION
The SAMES SA2007M is a single-phase bidirectional energy
metering integrated circuit. It provides a mono-chip 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.
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 SA2007M drives the calibration LED, the indicator LEDs
and the electro-mechanical counter directly.
The SA2007M 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
PRO-
CESSING
AND
POWER
CAL-
CULATION
COM-
PARATOR
POWER
TO
PULSE RATE
VOLTAGE
REF.
OSC
ELT
VSSVDD
SEL1
DIRO
LED
MOP
MON
RATED
VREF
Dr-01558
MP0MP1
POWER 1 (DIGITAL)
POWER 2 (DIGITAL)
GND
IIN2
TCLK
PRELIMINARY
