ST Life.augmented


Single Phase Metering ICs
  • active Active

The STPM3x is an ASSP family designed for high accuracy measurement of power and energies in power line systems using the Rogowski coil, current transformer or shunt current sensors. The STPM3x provides instantaneous voltage and current waveforms and calculates RMS values of voltage and currents, active, reactive and apparent power and energies. The STPM3x is a mixed signal IC family consisting of an analog and a digital section. The analog section consists of up to two programmable gain low-noise low-offset amplifiers and up to four 2ndorder 24-bit sigma-delta ADCs, two bandgap voltage references with independent temperature compensation, a low drop voltage regulator and DC buffers. The digital section consists of digital filtering stage, a hardwired DSP, DFE to the input and a serial communication interface (UART or SPI). The STPM3x is fully configurable and allows a fast digital system calibration in a single point over the entire current dynamic range.

pdf Please read
Errata Sheet
pdf データシート

Key Features

  • Active power accuracy:
  • <0.1% error over 5000: 1 dynamic range
  • <0.5% error over 10000: 1 dynamic range
  • Exceeds 50-60 Hz EN 50470-x, IEC 62053-2x, ANSI12.2x standard requirements for AC watt meters
  • Reactive power accuracy:
  • <0.1% error over 2000:1 dynamic range
  • Dual mode apparent energy calculation
  • Instantaneous and averaged power
  • RMS and instantaneous voltage and current
  • Under and overvoltage detection (sag and swell) and monitoring
  • Overcurrent detection and monitoring
  • UART and SPI serial interface with programmable CRC polynomial verification
  • Programmable LED and interrupt outputs
  • Four independent 24-bit 2ndorder sigma-delta ADCs
  • Two programmable gain chopper stabilized low-noise and low-offset amplifiers
  • Bandwidth 3.6 kHz @ -3 dB
  • Vccsupply range 3.3 V±10%
  • Supply current Icc4 mA (STPM32)
  • Input clock frequency 16 MHz, Xtal or external source
  • Twin precision voltage reference: 1.18 V with independent programmable TC, 10 ppm/°C typ.
  • Internal low drop regulator @ 3 V (typ.)
  • QFN packages
  • Operating temperature -40 °C~+85 °C



Technical Documentation

Product Specifications

Description Version Size
DS10272: ASSP for metering applications with up to four independent 24-bit 2nd order sigma-delta ADCs, 4 MHz OSF and 2 embedded PGLNA
2.0 3,595 KB

Application Notes

Description Version Size
AN4470: The STPM3x application calibration
1.1 1,485 KB

User Manual

Description Version Size
UM1719: The STPM3x evaluation software
1.1 1,324 KB
UM1748: EVALSTPM34, EVALSTPM33, EVALSTPM32 evaluation board
1.1 1,211 KB

Design Notes & Tips

Description Version Size
DT0039: Improving measuring accuracy and EFT immunity for STPM3x applications
1.0 1,919 KB

Presentations & Training Material


Description Version Size
STPM32, STPM33, STPM34 Smart Metering ICs
825 KB

Related Tools and Software

Related Tools and Software

製品型名 Description
EVALSTPM32 Single-phase energy metering evaluation board with shunt current sensor based on the STPM32
STSW-STPM001 STPM32/33/34 evaluation software
STEVAL-IPE023V1 USB interface tool for STPMxx family of energy meter ICs

Publications and Collaterals


Description Version Size
730 KB

サンプル& 購入

製品型名 Marketing StatusPackagePacking TypeOperating Temperature (min) Operating Temperature (max) AutoshutdownAutomotive GradeOrder From STUnit Price (US$)*
@ 1000
Distributor AvailabilityRoHS Compliance GradeDownload
Material Declaration**
STPM32TRActiveQFN-24LTape And Reel-4085_-.84Distributor reported inventory date: 2015-03-28
Distributor NameRegionStockMin. order
ARROWOrder NowAMERICA10004000

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