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STPM11 Datasheet(PDF) 1 Page - STMicroelectronics

Part No. STPM11
Description  Single phase energy metering IC with pulsed output and digital calibration
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Maker  STMICROELECTRONICS [STMicroelectronics]
Homepage  http://www.st.com
Logo STMICROELECTRONICS - STMicroelectronics

STPM11 Datasheet(HTML) 1 Page - STMicroelectronics

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January 2008
Rev 5
Single phase energy metering IC with pulsed output
and digital calibration
Ripple free active energy pulsed output
Direct stepper counter drivers
Shunt, current transformer, Rogowsky coil
Live and neutral monitoring (STPM13/14)
Easy and fast digital calibration at only one
load point
No-load, negative power and tamper indicators
Integrated linear vregs
RC (STPM11/13) or crystal oscillator
Support 50÷60 Hz - IEC62052-11, IEC62053-
2X specification
Less than 0.1% error
The STPM1x family is designed for effective
measurement of active energy in a power line
system using a Rogowski Coil, current
transformer and shunt sensors. This device is
specifically designed to provide all the necessary
features to implement a single phase energy
meter without any other active component. The
STPM1x device family consists, essentially, of two
parts: the analog part and the digital part. The
former, is composed of a preamplifier and first
∑Δ A/D converter blocks, band gap voltage
reference, low drop voltage regulator. The digital
part is composed of a system control, oscillator,
hard wired DSP and interface for calibration and
The calibration and configuration are done by
OTP cells, that can be programmed through a
serial interface. The configured bits are used for
testing, configuration and calibration purposes.
From two
∑Δ output signals coming from the
analog section, a DSP unit computes the amount
of consumed active energy. The active energy is
available as a pulse frequency output and directly
driven by a stepper counter. In the STPM1x 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 entry into test mode or
changing any configuration bit.
Table 1. Device summary
Order codes
TSSOP20 (tape and reel)
2500 parts per reel
TSSOP20 (tape and reel)
2500 parts per reel
TSSOP20 (tape and reel)
2500 parts per reel
TSSOP20 (tape and reel)
2500 parts per reel

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