EVALSTPM-3PHISO

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Three-phase full shunt electricity meter evaluation board based on STPMS2, STISO621W and STM32F413RH

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Product overview

Description

The EVALSTPM-3PHISO evaluation board implements a complete three-phase energy meter with low-cost shunt current sensors. The solution is based on the STPMS2 device, a double channel, 24-bits second order sigma-delta modulator, measuring voltage and current for each phase through a voltage divider and a shunt current sensor. Sensing circuitry and PCB layout are optimized to maximize signal-to-noise ratio for optimal accuracy.
The STPMS2 oversamples the signal using a 4 MHz clock distributed in a synchronized way by the microcontroller and outputs voltage and current sigma-delta bitstreams, multiplexed on the same pin.
The two-wire communication between STPMS2 modulator and MCU is isolated by STISO621W, 6 kV galvanic isolated interface, allowing up to 100 Mbps rate and low pulse distortion (<3ns) for safe and fast data transfer between isolated domains.
The FW embedded in the solution exploits the DFSDM filters of the STM32F413RH to convert the six bitstreams into 24-bits voltage and current data, at 200 us rate. All the metrology parameters are computed real time on a 200 us basis.
Two LEDs are available for active and reactive pulses generation.
The FW also implements a virtual com port communication to easily access the internal parameters to read metrology data, to modify the internal configuration for a high flexibility of the application, and to calibrate the board.
  • All features

    • Compliant to EN 50470-x, IEC 62053-2x, ANSI12.2x standard requirements for AC watt meters
    • Active wideband, active fundamental, reactive and apparent power/energy calculation for each phase and cumulative
    • Accuracy Class 0.5 according to IEC 62053-22 on 3-ph active/apparent power measurement
    • Accuracy Class 1 according to IEC 62053-21 on 3-ph reactive power measurement
    • 6 channels voltage and current decimated samples available @200 us
    • 2.5 kHz measurement bandwidth
    • RMS and THD (optional) calculation of each voltage and current signal
    • Selectable high pass filter for DC measurement
    • Line period and phase shift measurement for each phase
    • Phase voltage delays
    • Full calibration (amplitude, power offset and samples offset for DC measurement)
    • Two configurable LED for pulsed outputs
    • Communication through USB in virtual com port mode with shell commands
    • 6 kV galvanic isolation between the phases with 8 mm creepage and clearance

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Interfaces and Transceivers

All tools & software

    • Part number
      Status
      Description
      Type
      Supplier

      STSW-STPM004

      Active

      Embedded FW for three-phase full shunt electricity meter evaluation board based on STPMS2, STISO621 and STM32F413RH

      Evaluation Tool Software ST
      STSW-STPM004

      Description:

      Embedded FW for three-phase full shunt electricity meter evaluation board based on STPMS2, STISO621 and STM32F413RH

      STSW-STPM005

      Active

      Graphical user interface for EVALSTPM-3PHISO board

      Evaluation Tool Software ST
      STSW-STPM005

      Description:

      Graphical user interface for EVALSTPM-3PHISO board

Quality and Reliability

Part Number Marketing Status Package Grade RoHS Compliance Grade WEEE Compliant Material Declaration**
EVALSTPM-3PHISO
Active
CARD Industrial Ecopack1 -

EVALSTPM-3PHISO

Package:

CARD

Material Declaration**:

Marketing Status

Active

Package

CARD

Grade

Industrial

RoHS Compliance Grade

Ecopack1

(**) The Material Declaration forms available on st.com may be generic documents based on the most commonly used package within a package family. For this reason, they may not be 100% accurate for a specific device. Please contact our sales support for information on specific devices.

Sample & Buy

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Core Product
Marketing Status
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ECCN (US)
ECCN (EU)
Country of Origin
Budgetary Price (US$)*/Qty
EVALSTPM-3PHISO Available at 3 distributors

Distributor availability ofEVALSTPM-3PHISO

Distributor Name
Region Stock Min. Order Third party link
DIGIKEY WORLDWIDE 9 1 Order Now
MOUSER WORLDWIDE 7 1 Order Now
Farnell Element14 EUROPE 8 1 Order Now

Distributor reported inventory date: 2021-05-14

Distributor Name

DIGIKEY

Stock

9

Min.Order

1

Region

WORLDWIDE Order Now

MOUSER

Stock

7

Min.Order

1

Region

WORLDWIDE Order Now

Farnell Element14

Stock

8

Min.Order

1

Region

EUROPE Order Now

Distributor reported inventory date: 2021-05-14

Buy Direct STISO621
Active
ST EAR99 NEC ITALY 118.0 / 1

EVALSTPM-3PHISO

Core Product

STISO621

Marketing Status

Active

Budgetary Price (US$)*/Qty

118.0 / 1

Distributor availability ofEVALSTPM-3PHISO

Distributor Name
Region Stock Min. Order Third party link
DIGIKEY WORLDWIDE 9 1 Order Now
MOUSER WORLDWIDE 7 1 Order Now
Farnell Element14 EUROPE 8 1 Order Now

Distributor reported inventory date: 2021-05-14

Distributor Name

DIGIKEY

Stock

9

Min.Order

1

Region

WORLDWIDE Order Now

MOUSER

Stock

7

Min.Order

1

Region

WORLDWIDE Order Now

Farnell Element14

Stock

8

Min.Order

1

Region

EUROPE Order Now

Distributor reported inventory date: 2021-05-14

Supplier

ST

ECCN (US)

EAR99

ECCN (EU)

NEC

Budgetary Price (US$)* / Qty

118.0 / 1

Country of Origin

ITALY

(*) Suggested Resale Price per unit (USD) for BUDGETARY USE ONLY. For quotes, prices in local currency, please contact your local ST Sales Office  or our Distributors