STPM10 datasheet(1/51 Pages) STMICROELECTRONICS

部件名	STPM10

功能描述	Programmable single-phase energy metering IC with tamper detection

PDF	51 Pages

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制造商	STMICROELECTRONICS [STMicroelectronics]

网页	http://www.st.com

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1 / 51 page

June 2011

Doc ID 17728 Rev 3

1/51

51

STPM10

Programmable single-phase energy metering IC

with tamper detection

Features

■ Measures active, reactive, and apparent

energies

■ Current, voltage RMS and instantaneous

measurement

■ Frequency measurement

■ Ripple-free active energy pulsed output

■ Live and neutral monitoring for tamper

detection

■ Fast and simple one-point digital calibration

over the whole current range

■ Integrated linear voltage regulators for digital

and analog supply

■ Selectable RC or crystal oscillator

■ Supports 50 - 60 Hz - IEC62052-11, IEC62053-

2x specifications

■ Less than 0.1% error in the 1000:1 range

■ Precision voltage reference: 1.23 V with 30

ppm/°C max

Description

The STPM10 is designed for effective

measurement of active, reactive and apparent

energy in a power line system using current

transformer and shunt sensors. The device can

be implemented for peripheral measurement in a

microcontroller-based single-phase or poly-phase

energy meter. The STPM10 consists of two main

sections: analog and digital. The analog part is

composed of preamplifier and first-order sigma-

delta A/D converter blocks, a band-gap voltage

reference and low-drop voltage regulator. The

digital part is composed of system control,

oscillator, hard-wired DSP and SPI interface.

There is also an internal volatile memory, which is

controlled through the SPI by means of a

dedicated command set. The configured bits are

used for configuration and calibration purposes.

From a pair of sigma-delta output signals

produced by the analog section, the DSP unit

computes the amount of active, reactive and

apparent energy consumed, as well as the RMS

and instantaneous voltage and current values.

The results of the computation are available as

pulse frequencies 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 the SPI interface. The system bus

interface is also used for temporary programming

of bits of internal volatile memory. The STPM10

generates an output signal with a pulse frequency

proportional to the energy, and this signal is used

in the calibration phase of the energy metering

application.

TSSOP20

Table 1.

Device summary

Order code

Temperature range

Package

Packaging

STPM10BTR

- 40 to 85 °C

TSSOP20 (tape and reel)

2500 parts per reel

www.st.com

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