STPM01
PROGRAMMABLE SINGLE PHASE ENERGY METERING
IC WITH TAMPER DETECTION
PRELIMINARY DATA
s
s
s
s
s
s
s
s
s
s
INTEGRATED LINEAR VREGS TO SUPPLY
THE DIGITAL AND ANALOG CORES
ADVANCED BICMOS TECHNOLOGY FOR
HIGH PERFORMANCE
OTP FOR CALIBRATION AND
CONFIGURATION
INTEGRATED OSCILLATOR WITH
EXTERNAL RESISTOR OR CRYSTAL
MONITOR BOTH LIVE AND NEUTRAL FOR
TAMPER DETECTION
SIGMA DELTA 1
st
ORDER CONVERTER
POWER SUPPLY CURRENT LESS THAN
6mA
SUPPORT 50 梅 60 Hz 鈥?IEC 62052-11,
IEC 62053-2X SPECIFICATION FOR CLASS
0.5 AC WATT METERS
PRECISION VOLTAGE REFERENCE ON
CHIP: 1.25 V AND 30 ppm/擄C MAX
TSSOP20 PACKAGE
TSSOP
DESCRIPTION
The STPM01 is designed for effective
measurement of active energy in a power line
system using the Rogowski and/or Shunt
principle. This device can be implemented as a
single chip 1-phase energy meter or as a
peripheral measurement in a microprocessor
based 1-phase or 3-phase energy meter.
The STPM01 consists, essentially, of two parts:
the analog part and the digital part. The former, is
composed by preamplifier and 1
st
order
危D
AD
converter blocks, Bandgap voltage reference,
Lowdrop voltage regulator and a pair of DC buffer,
the latter, is composed by system control, clock
generator, hard wired DSP and SPI interface.
There is also a OTP block, which is controlled
Table 1: Order Codes
Type
STPM01
Temperature
Range
-40 to 85 擄C
through the SPI by means of a dedicated
command set. The configured bits are used for
testing, configuration and calibration purpose.
From a pair of
危D
output signals coming from
analog section, a DSP unit computes the amount
of consummated active, reactive and apparent
energy, RMS values of voltage and current value.
The results of computation are available as pulse
frequency and states on the digital outputs of the
device or as data bits in a data stream, which can
be read from the device by means of SPI
interface. This system bus interface is used also
during production testing of the device and/or for
temporary or permanent programming of bits of
internal OTP.
In the STPM01 the calibration is very easy: an
output signal with pulse frequency proportional to
energy is generated, this signal is used to enable
the calibration of the energy meter.
When the device is fully configured and calibrated,
a dedicated bit of OTP block, can be written
permanently in order to prevent accidental
entering into some test mode or changing any
configuration.
Package
TSSOP20 (Tape & Reel)
Comments
2500 parts per reel
September 2004
Rev. 1
1/9
This is preliminary information on a new product now in development or undergoing evaluation. Details are subject to change without notice.
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