STPM14
Overview
- Ripple free active energy pulsed output
- Direct stepper counter drivers )
- Shunt, current transformer, Rogowsky coil t(s sensors c
- Live and neutral monitoring (STPM13/14) du
- Easy and fast digital calibration at only one ro load point P
- No-load, negative power and tamper indicators te
- Integrated linear VREGs le
- RC (STPM11/13) or crystal oscillator o (STPM12/14) bs
- Support 50 ÷ 60 Hz - IEC62052-11, IEC62053O 2X specification -
- Less than 0.1% error t(s) Description uc The STPM1x family is designed for effective rod measurement of active energy in a power line system using a Rogowski Coil, current P transformer and shunt sensors. This device is te specifically designed to provide all the necessary le features to implement a single phase energy o meter without any other active component. The s STPM1x device family consists, essentially, of two bparts: the analog part and the digital part. The Oformer, is composed of a preamplifier and first TSSOP20 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 ∑ 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. order ∑ Δ A/D converter blocks, band gap voltage reference, l
