STPMS2L-PUR

Sensor And Detector Interfaces Overview

The STPMS2L-PUR is a smart sensor ASSP designed for high-precision measurement in power line systems. It integrates two second-order sigma-delta modulators and a programmable chopper-stabilized low-noise amplifier to process signals from Rogowski coils, current transformers, Hall sensors, or shunts. The device operates with a VCC supply range of 3.2 V to 5.5 V and includes an internal low-drop regulator providing approximately 3 V. It features a precision voltage reference of 1.23 V with programmable temperature coefficient. The component supports 50-60 Hz frequencies and complies with EN 50470-1, EN 50470-3, IEC 62053-21, IEC 62053-22, and IEC 62053-23 standards for Class 1, 0.5, and 0.2 AC watt meters. Specifically, the STPMS2L-PUR variant achieves less than 0.5% error over a 1:5000 dynamic range.

Sensor And Detector Interfaces Feature Summary

• Dual-channel architecture with embedded second-order sigma-delta modulation for simultaneous single or dual input monitoring
• Chopper-stabilized low-noise amplifier with programmable gain to minimize offset and noise in signal conditioning
• Compliance with international metrology standards for high-accuracy AC watt meter classifications
• Integrated precision voltage reference and internal low-drop regulator for stable mixed-signal operation

Sensor And Detector Interfaces Applications

• Single-phase energy meter construction
• Multi-phase energy meter building blocks
• Medium and high-resolution power line measurement systems

Sensor And Detector Interfaces Procurement Notes

Verify the specific suffix PUR against official datasheets to confirm package type and tape-and-reel specifications. Ensure compatibility with the host digital signal processor, such as the STPMC1, for proper sigma-delta bitstream processing. Confirm that the 3.2 V to 5.5 V supply range aligns with the system's power distribution design before integration.

Sensor And Detector Interfaces Selection Notes

Select this component when designing energy meters requiring Class 1, 0.5, or 0.2 accuracy levels per IEC standards. It is suitable for applications utilizing Rogowski coils, CTs, Hall sensors, or shunts. Choose this part if a dual-channel solution with integrated modulation and amplification is preferred over discrete ADC designs. Ensure the system can accommodate the required 50-60 Hz frequency range and dynamic range specifications.

Sensor And Detector Interfaces Part Context

The STPMS2L-PUR belongs to the STPMS2 family of smart sensors, which are ASSPs intended for use with the STPMC1 digital signal processor. This family serves as a foundational building block for modern smart metering solutions. The device bridges analog sensing elements and digital processing cores, simplifying the design of compliant energy measurement systems by handling modulation and initial signal conditioning internally.

Sensor And Detector Interfaces Replacement Considerations

Public confirmed substitute part numbers are not available in the provided documentation. Verify pinout and functional compatibility if considering alternative dual-channel sigma-delta modulators from other manufacturers.