STPM01

STPM01 Programmable single phase energy metering IC with tamper detection Features ■ 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: 1.23 V 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 monophase energy meter or as a peripheral measurement in a microcontroller based monophase 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 Δ ∑ A/D converter blocks, band gap voltage reference, low drop voltage regulator, the latter, is composed by 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 Table 1. Device summary Order code Temperature range STPM01FTR - 40 to 85 °C TSSOP20 dedicated command set. The configured bits are used for testing, configuration a...