STPM01FTR

Overview

The STPM01FTR is a programmable single-phase energy metering IC designed for effective measurement of active, reactive, and apparent energy in power line systems. It utilizes Rogowski coils, current transformers, or shunt sensors as input sources. The device integrates analog preamplifiers, a first-order delta-sigma A/D converter, and a digital section with a hard-wired DSP and SPI interface. It computes RMS and instantaneous voltage and current values, providing results via pulse frequency outputs or SPI data streams. Key features include ripple-free active energy pulsed output and an OTP block for permanent configuration and calibration storage.

Feature Summary

• Integrates analog front-end with delta-sigma ADC and digital signal processor for precise energy computation
• Provides ripple-free active energy pulsed output for simplified calibration processes
• Includes one-time programmable (OTP) memory for secure configuration and calibration bit storage
• Supports SPI interface for system control, data reading, and production testing

Applications

• Single-chip monophase energy meters
• Peripheral measurement modules in microcontroller-based monophase energy meters
• Peripheral measurement modules in microcontroller-based three-phase energy meters

Procurement Notes

Verify the specific suffix 'FTR' against official STMicroelectronics documentation to confirm tape-and-reel packaging and exact ordering code validity. Ensure compatibility with existing PCB footprints and SPI interface requirements. Confirm that the OTP programming capabilities align with your manufacturing calibration workflow. Cross-reference the datasheet revision date to ensure all electrical characteristics and pin definitions remain current for your design implementation.

Selection Notes

Select this component when designing single-phase energy metering solutions requiring high accuracy without external DSP resources. It is suitable for applications utilizing Rogowski coils, current transformers, or shunt sensors. Consider its integrated OTP for permanent calibration storage and ripple-free pulse output for easy meter calibration. Evaluate the SPI interface complexity against your host controller's capabilities. This IC serves as a complete solution for measuring active, reactive, and apparent energy in standard power line systems.

Part Context

The STPM01 belongs to STMicroelectronics' portfolio of programmable energy metering ICs, which also includes models like the STPM10. These devices are engineered for accurate energy measurement in single-phase and three-phase systems. The STPM01 specifically targets cost-effective implementations where a dedicated DSP is not available on the main microcontroller, offloading complex calculations to its internal hard-wired DSP unit while maintaining precision through delta-sigma conversion.

FAQ

How does the STPM01 handle calibration?

The device generates a ripple-free active energy pulsed output proportional to consumed energy, facilitating straightforward calibration. Configuration and calibration bits can be permanently stored in the internal OTP block via the SPI interface to prevent accidental changes.

What types of sensors are supported by the STPM01?

The STPM01 is designed to work with Rogowski coils, current transformers, and shunt sensors for measuring current in power line systems.