STPM34TR - 4-ADC 24-Bit Energy Meter AFE | STMicroelectronics
MPN: STPM34TR ✓ Hoạt độngSTPM34TR Tóm tắt
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.
Bộ thay thế dễ dàng lắp đặt cho STPM34TR — cùng gói, chân-to-chân tương thích. Các bộ phận yêu cầu hàn PCB bị loại trừ.
Các biến thể trong loạt này
Các mẫu cùng loạt có thể lắp đặt dễ dàng tương thích với STPM34TR (cùng hình factor và footprint) — khác nhau ở ADC Resolution, Mounting Type, Number of ADCs, Package, Product Type.
Không có bộ thay thế dễ dàng lắp đặt sẵn có cho sản phẩm này.
Yêu cầu các bộ thay thếSTPM34TR Tỷ lệ tối đa & tính chất điện
| 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 |
| Khoảng nhiệt độ hoạt động | -40°C to +105°C |
| Hộp | 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 |
| Kiểu lắp đặt | Surface-mount QFN |
| Manufacturer | STMicroelectronics |
Hướng dẫn cấu hình chân STPM34TR qfn-32 with exposed pad, 5 x 5 mm
Cấu hình chân cho STPM34TR (qfn-32 with exposed pad, 5 x 5 mm gói). Thành phần số hiệu này có chân đầu vào, đầu ra và nguồn cung cấp. Tham khảo tài liệu thông số kỹ thuật của nhà sản xuất để biết cấu hình chân bù, bù trừ và chân kích hoạt. Hoàn hảo cho điều kiện tín hiệu và mạch khuếch đại.
Không có dữ liệu chân cụ thể sẵn có cho STPM34TR.
Tham khảo: tài liệu kỹ thuật cho cấu hình chân đầy đủ.
Ứng dụng tiêu biểu
STPM34TR phù hợp cho 6 Áp dụngs: 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.
Được đề xuất
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.
Được đề xuất
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.
Được đề xuất
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.
Được đề xuất
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.
Được đề xuất
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.
Được đề xuất
Tóm tắt các sản phẩm được đề xuất
Dữ liệu tham khảo kỹ thuật cho STPM34TR — so sánh, hướng dẫn thiết kế và thông tin tuân thủ.
Hướng dẫn chọn lựa
Bảo phân biệt quan trọng
- Dedicated high-resolution metering conversion (vsGeneric general-purpose ADC devices)
- Integrated sensor-conditioning resources (vsDiscrete amplifier-centered approaches)
- Lợi thế (vsSingle-sensor-only metering front ends)
Ghi chú thiết kế
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.
Thông tin tuân thủ
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.
