STPMS2H-PUR - Dual-Channel 4 MHz Smart Sensor IC | STMicroelectronics
MPN: STPMS2H-PUR ✓ ActiveSTPMS2H-PUR Overview
A smart sensor interface is a specialized analog front end that sits between physical sensors and a digital controller. Its functional hierarchy is sensor interface, analog front end, sigma-delta modulator, signal-conversion IC, and integrated circuit. By converting analog quantities into bit streams early in the signal chain, the STPMS2H-PUR supports compact sensing systems in which sensing, modulation, and digital processing are partitioned between analog and digital stages.
The STPMS2H-PUR provides two independent 1-bit modulator channels, a 4 MHz clock, and second-order sigma-delta modulation with embedded PGLNA sections. These features make it applicable to high-resolution sensing architectures where analog amplification and conversion must coexist in a compact package. The 16-VFQFN package includes an exposed pad and uses a 0.65 mm terminal pitch for high-density surface-mount assembly.
Its analog-to-digital conversion architecture employs second-order sigma-delta modulation rather than a conventional multi-bit SAR or flash converter. Two 1-bit output streams can be combined digitally to preserve resolution while limiting the analog output-node count. The embedded PGLNA blocks reduce the amount of separate gain-stage circuitry needed for low-level sensor signals, although gain settings and signal-chain limits should be confirmed against the manufacturer datasheet.
Typical uses include industrial condition monitoring, resistive or bridge-based sensing, compact pressure or position sensing, and low-power acquisition modules that feed a microcontroller or dedicated digital filter. The industrial temperature grade and surface-mount construction suit equipment intended for controlled industrial environments rather than extended automotive qualification.
When laying out a design, treat the exposed pad as a thermal and electrical connection to the PCB rather than a no-connect area. Keep analog inputs short, maintain the datasheet-specified input filtering and grounding topology, and provide local supply bypassing close to the package pins. Confirm gain, calibration, and output-data handling against the manufacturer documentation before production release.
Drop-in alternatives for STPMS2H-PUR — same package, pin-to-pin compatible. Different-package parts requiring PCB rework are excluded.
Variants in this series
Same-series models that are drop-in compatible with STPMS2H-PUR (same form factor and footprint) — differing in Converter Architecture, Package.
STPMS2L-PUR
✅ Drop-InContact for price
View Datasheet →STPMS2H-PUR Maximum Ratings & Electrical Characteristics
| Product Type | Smart sensor II sensor and detector interface IC |
| Converter Architecture | Dual-channel, second-order sigma-delta modulator |
| Channel Count | 2 channels |
| Digital Output Resolution | 1 bit per channel |
| Modulator Clock | 4 MHz |
| Embedded Analog Front End | Embedded PGLNA |
| Input Type | Analog |
| Output Type | Digital |
| Supply Voltage | 5.5 V maximum |
| Nominal Voltage | 5 V |
| Package | 16-VFQHN (HVQCCN), 4 x 4 mm, exposed pad |
| Terminal Count | 16 terminals |
| Terminal Pitch | 0.65 mm |
| Package Shape | Square |
| Mounting Type | Surface mount |
| Temperature Grade | Industrial |
| Maximum Operating Temperature | 85 °C |
| Lead-Free Status | Lead-free |
| Packaging | Tape and reel |
STPMS2H-PUR square Pin Configuration Guide
Pin configuration for STPMS2H-PUR (square package). Pin numbering, functions, and connection diagrams are defined in the manufacturer datasheet. Refer to it for the exact footprint and soldering guidelines.
No detailed pinout data available for STPMS2H-PUR.
Refer to the datasheet for full pin configuration.
Typical Applications
STPMS2H-PUR is suitable for 6 applications: Industrial Condition Monitoring, Resistive Bridge Sensor Acquisition, Low-Power Portable Sensing Module, Precision Pressure Sensor Interface, Position and Displacement Measurement, Compact Data-Acquisition Front End.
Industrial Condition Monitoring
The STPMS2H-PUR is suitable for compact industrial condition-monitoring front ends because it combines two analog-input channels with embedded PGLNA sections and 1-bit, second-order sigma-delta outputs clocked at 4 MHz. Each channel can condition and digitize a low-level transducer signal close to the sensing element, reducing analog trace length and analog-noise exposure. A downstream controller can then decode and filter the bit streams. The 16-VFQHN package with an exposed pad supports dense, surface-mount instrument designs, while the industrial grade and 85 °C maximum temperature suit controlled factory environments. Verify the permitted excitation, gain range, and calibration method for the selected resistive, piezoelectric, or bridge sensor before committing the analog design.
Recommended
Resistive Bridge Sensor Acquisition
The STPMS2H-PUR fits low-level bridge-sensor acquisition where two differential sensing paths must be digitized close to the transducer. Its embedded PGLNA blocks provide analog gain ahead of the two second-order, 1-bit sigma-delta modulators, limiting the amount of separate gain amplification required. The 4 MHz modulator clock supports digital reconstruction when paired with a suitable decimation filter in an STM32-class controller. Because the supplied data does not enumerate input common-mode range or PGLNA gain steps, the bridge excitation and operating point must be checked against the manufacturer datasheet. Short, symmetric routing from the bridge to the package is essential so that the modulator does not acquire board-level differences as sensor errors.
Recommended
Low-Power Portable Sensing Module
The STPMS2H-PUR can be used in battery-powered sensing modules where analog conversion must be integrated without a separate multi-bit converter. Two 1-bit output streams reduce the number of digital output nodes, while the embedded PGLNA sections bring conditioned sensor signals into the modulation stage. A microcontroller such as the STM32F072 family can decode and low-pass-filter the data, allowing useful updates to be generated only when needed. The 4 x 4 mm 16-VFQHN footprint leaves board area for the power system and radio or communications section. Actual battery-life performance depends on the selected duty cycle, analog bias conditions, and digital filter bandwidth, none of which is quantified in the supplied excerpts.
Recommended
Precision Pressure Sensor Interface
The STPMS2H-PUR provides a compact analog-to-digital front end for pressure transducers whose output must be captured close to the sensing element. The embedded PGLNA can condition the relatively small sensor signal before the second-order sigma-delta modulators generate 1-bit data streams, allowing a digital controller to perform scaling, compensation, and temperature correction. Its dual-channel architecture can support two related quantities, such as pressure and temperature, within one compact package. The industrial temperature grade and surface-mount construction fit pressure-monitoring instruments and embedded equipment. Before schematic release, confirm input bias current, permitted signal range, gain configuration, self-calibration behavior, and the effect of exposed-pad grounding on accuracy using the manufacturer datasheet.
Recommended
Position and Displacement Measurement
The STPMS2H-PUR is applicable to analog position and displacement systems that require two synchronized measurement channels. Both embedded PGLNA blocks feed 1-bit, second-order sigma-delta modulators operating at 4 MHz, which can be decoded and filtered digitally to recover the physical displacement signal. Locating the conversion stage beside the resistive or inductive sensing element reduces sensitivity to interference over long analog interconnects. The 16-VFQHN package also permits reuse of the same acquisition architecture across multiple board variants. Design checks should include excitation strategy, permissible input swing, channel-to-channel synchronization, and gain settling. Verify those electrical constraints in the manufacturer documentation because they are not quantified in the supplied distributor excerpts.
Recommended
Compact Data-Acquisition Front End
The STPMS2H-PUR can form the sensor-input stage of a compact multi-channel data-acquisition front end. Two analog channels are amplified by embedded PGLNA sections and converted into 1-bit sigma-delta streams, while an external microcontroller performs digital decimation, scaling, and buffering. This partitioning keeps the analog section compact and moves most numerical processing into digital circuitry where calibration tables and filters are easier to update. The 4 MHz clock and 1-bit outputs provide clearly identified conversion characteristics for system-level clocking and filter design. The exposed-pad package requires careful PCB thermal and grounding design, and supply decoupling must be placed close to the device. Confirm input bandwidth, clock tolerance, output timing, and calibration sequence against the manufacturer datasheet.
Recommended
Recommended Products Summary
Engineering reference data for STPMS2H-PUR — comparison, design guidance, and compliance information.
Selection Guide
Comparison with Alternatives
| Parameter | This Product | STPMS2L-PUR |
|---|---|---|
| Package | 16-VFQHN (HVQCCN), 4 x 4 mm, exposed pad | Same-family package listed as HVQCCN |
| Brand | STMicroelectronics | STMicroelectronics |
| Product Family | Smart Sensor II | Smart Sensor II |
| Reference Price | $3.630 as of 2026-10-28 | $3.630 as of 2026-10-28 |
Key Differentiators
- Dual-channel smart sensor conversion in one compact package (vs STPMS2L-PUR)
- Digital modulation reduces analog output-node count (vs STPMS2L-PUR)
- Industrial temperature coverage (vs STPMS2L-PUR)
Design Notes
Route each analog input with a short, symmetrical path from the sensor or front-end network to the STPMS2H-PUR. Place the documented input filtering components directly beside the corresponding package pins, and avoid routing the analog signals beneath digital clocks, memory interfaces, or switching-node areas. Because the device uses a sigma-delta architecture, unequal trace lengths and parasitic coupling can appear as offset, gain error, or modulation of the recovered measurement.
Connect the exposed pad according to the manufacturer package land pattern and use it as the principal return path for the device. Provide a low-impedance ground connection and adequate copper area under the package while keeping sensitive analog returns away from noisy switching currents. The exposed pad is not an unused thermal-only feature: leaving it poorly connected can degrade noise performance, temperature behavior, and supply-reference stability.
Place the required supply bypass capacitors immediately next to the device's supply and ground pins, and keep their current loops as small as possible. The verified 5.5 V maximum supply rating provides the upper operating limit, not a recommendation to operate at 5.5 V. Confirm the permitted supply range, sequencing requirements, and whether the PGLNA references are derived internally or externally before finalizing the power tree.
Compliance Information
The verified listings identify the STPMS2H-PUR as lead-free. RoHS, REACH, halogen-free, and conflict-minerals declarations were not present in the supplied excerpts, so they are recorded as unknown rather than inferred.
