STPM01 Datasheet, PDF (1/56 Pages) List of Unclassifed Manufacturers – PROGRAMMABLE SINGLE PHASE ENERGY METERING IC WITH TAMPER DETECTION

STPM01
Programmable single phase energy metering IC
with tamper detection
Feature summary
■ Active, reactive, apparent energies and RMS
values
■ Ripple free active energy pulsed output
■ Live and neutral monitoring for tamper
detection
■ Easy and fast digital calibration in only one
point over the whole current range
■ OTP for calibration and configuration
■ Integrated linear VREGS for digital and analog
supply
■ Selectable RC or crystal oscillator
■ Support 50÷60 HZ – IEC62052-11, IEC62053-
2x specification
■ Less than 0.1% error
■ Precision voltage reference:
1.23V and 30 ppm/°C Max
Description
The STPM01 is designed for effective
measurement of active, reactive and apparent
energy in a power line system using Rogowski
Coil, Current Transformer and Shunt sensors.
This device can be implemented as a single chip
1-phase energy meter or as a peripheral
measurement in a microcontroller 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 1st order ∆ ∑ A/D converter
blocks, Band gap voltage reference, Low drop
voltage regulator, the latter, is composed by
TSSOP20
system control, oscillator, hard wired DSP and
SPI interface.
There is also an OTP block, which is controlled
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 ∆ ∑ output signals coming from
analog section, a DSP unit computes the amount
of consummated active, reactive and apparent
energy, RMS and instantaneous values of voltage
and current. 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 an output signal with pulse frequency
proportional to energy is generated, this signal is
used in the calibration phase of the energy meter
application allowing a very easy approach. 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 bit.
Order code
Part number
STPM01FTR
February 2007
Temperature range
-40 to 85 °C
Package
TSSOP20 (Tape & reel)
Rev. 4
Packaging
2500 parts per reel
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