STPM34TR - 4-ADC 24-Bit Energy Meter AFE | STMicroelectronics
MPN: STPM34TR ✓ Active| Qty | Unit Price | Extended |
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| 1 | $0 | $0.00 |
| 10 | $0 | $0.00 |
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| 500 | $0 | $0.00 |
| 1,000 | $0 | $0.00 |
STPM34TR Overview
An energy-metering analog front end converts weak, noisy sensor signals into digital measurements suitable for power, energy and protection calculations. Unlike a general-purpose ADC, the STPM3x family integrates metering-specific channels, programmable gain, references and signal conditioning. It supports power-line measurement systems using Rogowski coils, current transformers or shunts, with the sensor choice determining bandwidth, isolation, accuracy and PCB complexity.
The four 24-bit second-order sigma-delta channels provide high-resolution acquisition for multiple voltage and current inputs. A 4 MHz oversampling mode can improve conversion performance, while two embedded PGLNAs reduce the need for separate low-noise gain stages in suitable signal paths. Independent reference and channel shutdown controls provide a route to lower power consumption when not every measurement channel is continuously required.
The operating supply is verified at 2.95 V to 3.65 V. Distributor and technical listings identify the industrial temperature range as -40°C to +105°C, and the package as a 5 x 5 mm QFN-32 with exposed thermal pad. The exposed pad must be connected to the appropriate ground plane and handled with the thermal layout requirements specified by the manufacturer datasheet.
Typical applications include single-phase and three-phase energy meters, utility-grade residential metering, industrial power monitors, appliance energy measurement, solar and building-energy monitoring, and systems using Rogowski coils or isolated current transformers. The STPM34TR is particularly appropriate when the design requires multiple high-resolution measurements and dedicated metering signal conditioning rather than a general-purpose data converter.
For a new design, verify sensor compatibility, channel assignment, reference configuration, gain settings, calibration method and exposed-pad thermal management against the manufacturer datasheet before layout. The cited web data does not provide a verified unit price, stock quantity, detailed pin names, RoHS declaration, REACH declaration or automotive qualification status.
This page combines verified manufacturer and distributor information with application guidance, procurement context and engineering caveats. Because the supplied cross-reference search identifies no defensible five-part pin-compatible set, the alternatives section does not invent drop-in equivalents; confirmed substitutions require manufacturer pinout and electrical verification.
Drop-in alternatives for STPM34TR — 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 STPM34TR (same form factor and footprint) — differing in ADC Resolution, Mounting Type, Number of ADCs, Package, Product Type.
Quick Comparison Tool — Select alternative parts for side-by-side comparison:
No drop-in alternatives available for this product.
Request AlternativesSTPM34TR Maximum Ratings & Electrical Characteristics
| Product Type | Energy-metering analog front end (AFE) |
| Number of ADCs | 4 independent ADCs |
| ADC Resolution | 24 bit |
| Sigma-Delta Modulator Order | 2nd order |
| Oversampling Frequency | 4 MHz |
| Embedded PGLNAs | 2 |
| Supply Voltage Range | 2.95 V to 3.65 V |
| Operating Temperature Range | -40°C to +105°C |
| Package | QFN-32 with exposed pad, 5 x 5 mm |
| Supported Sensor Types | Rogowski coil, current transformer, shunt current sensor |
| Measurement Type | DC and AC energy measurement |
| Voltage Reference Channels | 2 embedded references |
| Reference Shutdown Control | EN_REF1 and EN_REF2 control bits |
| Channel Shutdown Control | Voltage and current channels can be switched off independently |
| Mounting Type | Surface-mount QFN |
| Manufacturer | STMicroelectronics |
STPM34TR qfn-32 with exposed pad, 5 x 5 mm Pin Configuration Guide
Pin configuration for STPM34TR (qfn-32 with exposed pad, 5 x 5 mm package). This analog component features input, output, and power supply pins. Refer to the manufacturer datasheet for offset null, compensation, and enable pin configurations. Ideal for signal conditioning and amplifier circuits.
No detailed pinout data available for STPM34TR.
Refer to the datasheet for full pin configuration.
Typical Applications
STPM34TR is suitable for 6 applications: Single-Phase Residential Energy Meter, Three-Phase Industrial Power Monitor, Rogowski-Coil Energy Acquisition, Current-Transformer Metering Board, Appliance Energy-Monitoring Module, Solar and Building Energy Meter.
Single-Phase Residential Energy Meter
STPM34TR fits a residential energy meter that must acquire voltage and current information for real power, energy and power-factor calculations. Its four independent 24-bit second-order sigma-delta ADC channels provide dedicated measurement capacity, while the two embedded PGLNAs can support suitable low-level sensor conditioning. Designers should select the current-sensor implementation, configure the reference channels and calibrate gain and phase using the manufacturer procedure. The 2.95 V to 3.65 V supply is appropriate for a 3.3 V metering architecture, but the analog input network must preserve signal integrity while rejecting mains-related disturbance.
Recommended
Three-Phase Industrial Power Monitor
STPM34TR can form the measurement core of an industrial power monitor when the design assigns the available ADC channels to the required voltage and current signals. The 24-bit conversion resolution and four-channel architecture are useful for a compact multi-measurement front end, while the embedded references support controlled acquisition. In a three-phase system, channel synchronization, sensor scaling, isolation and anti-aliasing filtering determine usable accuracy. Engineers should verify the manufacturer’s phase-measurement configuration and calculate the analog input range for each voltage divider and current-sensor output rather than assuming identical scaling.
Recommended
Rogowski-Coil Energy Acquisition
A Rogowski-coil front end can use STPM34TR when the sensor output, amplifier gain and bandwidth are matched to the metering bandwidth of the application. The device’s embedded PGLNAs and high-resolution sigma-delta channels are intended for precision measurement rather than simple threshold detection. Because a Rogowski coil produces a signal proportional to current derivative, the analog path and firmware must address integration, offset, phase response and calibration. The supplied sources confirm Rogowski-coil support but do not provide the complete input-range table, so the final sensor interface must follow the STMicroelectronics datasheet.
Recommended
Current-Transformer Metering Board
STPM34TR is suitable for a current-transformer-based energy-metering board when the board provides the required burden network, biasing and isolation around the sensor. The STPM3x family supports current transformers, and the four independent ADC channels allow voltage and current measurements to be acquired within one dedicated metering IC. The design must account for CT ratio, secondary burden, saturation, phase error and the device’s specified analog-input limits. A current transformer also introduces isolation and safety requirements that depend on the complete meter architecture; do not infer compliance from the AFE package alone.
Recommended
Appliance Energy-Monitoring Module
STPM34TR can serve as the measurement front end in an appliance energy-monitoring module that measures low-level consumption and records energy over time. Its 24-bit second-order sigma-delta ADCs are suited to precision acquisition, while the available embedded PGLNAs may reduce the amount of external analog conditioning for compatible sensor levels. The module should still include sensor-specific scaling, input protection, calibration storage and a communications path. Reference and channel shutdown controls can help manage power use when continuous measurement is unnecessary, but the resulting measurement sequence must preserve the accuracy required by the product.
Recommended
Solar and Building Energy Meter
STPM34TR is applicable to solar or building-energy monitoring systems that need accurate acquisition from several voltage and current signals. The four-channel architecture can reduce the number of separate measurement converters in a compact design, and the two embedded references provide controlled ADC references. The application should define anti-aliasing, sensor bandwidth, phase calibration and power-loss behavior before PCB release. Because the supplied data does not identify a dedicated solar reference circuit or safety certification, use the manufacturer application information and validate the final system for the relevant installation environment.
Recommended
Recommended Products Summary
Engineering reference data for STPM34TR — comparison, design guidance, and compliance information.
Selection Guide
Key Differentiators
- Dedicated high-resolution metering conversion (vs Generic general-purpose ADC devices)
- Integrated sensor-conditioning resources (vs Discrete amplifier-centered approaches)
- Advantage (vs Single-sensor-only metering front ends)
Design Notes
Keep the analog sensor inputs, reference circuitry and ADC channels physically separated from digital clock, communications and switching-power paths. Use short traces, a continuous ground reference and an analog ground strategy that follows the STMicroelectronics recommended layout. Place input filtering and protection close to the external sensor interface, and verify the exposed-pad net against the official package drawing before fabrication.
Design the analog front end from the actual Rogowski-coil, current-transformer or shunt output level. Confirm input range, bandwidth, gain, anti-aliasing requirements and sampling behavior in the datasheet; the supplied sources confirm sensor support but do not provide complete input-range values. Treat the two embedded PGLNAs as usable only when their gain, bandwidth and common-mode conditions match the selected sensor.
Do not assume that the STPM32, STPM33 and STPM34 family members are drop-in replacements. Channel count, references, calibration, configuration registers and package details must be compared against the exact manufacturer datasheet. Also do not infer RoHS, REACH or automotive status from distributor category text; request current compliance documentation for production release.
Compliance Information
The supplied STMicroelectronics product and distributor search results do not state RoHS, REACH, AEC-Q100, lead-free, halogen-free or conflict-minerals status. Compliance must be confirmed from current manufacturer documentation.
