STPM11| Datasheet

STPM11, STPM11ATR, STPM12, STPM12ATR, STPM13, STPM13ATR, STPM14, STPM14ATR

Datasheet preview, take a look at Datasheets before downloading (Data Sheet is available on manufacturer site)

STPM11/12/13/14
Single phase energy metering IC with pulsed output and digital calibration
Features

Ripple free active energy pulsed output Direct stepper counter drivers Shunt, current transformer, Rogowsky coil sensors 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 (STPM12/14) Support 50 60 Hz - IEC62052-11, IEC620532X specification Less than 0.1% error hard wired DSP and interface for calibration and configuration. 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 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 t
he 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.
TSSOP20

Description
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 order A/D converter blocks, band gap voltage reference, low drop voltage regulator. The digital part is composed of a system control, oscillator, Table 1. Device summary
Order codes STPM11ATR STPM12ATR STPM13ATR STPM14ATR

Package TSSOP20 (tape and reel) TSSOP20 (tape and reel) TSSOP20 (tape and reel) TSSOP20 (tape and reel)

Packaging 2500 parts per reel 2500 parts per reel 2500 parts per reel 2500 parts per reel

January 2008

Rev 5

1/45
www.st.com 45