LTC2947IUHF-65#PBF - 65A Power/Energy Monitor | Analog Devices
MPN： LTC2947IUHF-65#PBF ✓ 啟用中LTC2947IUHF-65#PBF 概覽
A power and energy monitor measures electrical quantities inside a load path and exposes them digitally for telemetry, diagnostics, energy billing, or control. This device sits in the power-management hierarchy as an energy-metering IC, current monitor, and power monitor. Unlike a general-purpose analog-to-digital converter, the LTC2947-65 combines voltage acquisition, bidirectional current acquisition, real-time power multiplication, and accumulated energy in one dedicated instrument.
Verified product information highlights the device's ±65 A current capability, three no-latency delta-sigma ADCs, and analog voltage-current multiplication. Its broad measurement range allows one monitor to cover positive consumption, reverse current, and high-current system buses. The manufacturer describes the LTC2947-65 family as a high-precision power and energy meter, while distributor records identify LTC2947IUHF-65#PBF as a single-phase meter IC in a 38-QFN package.
The monitor supports internal or external clocking for precise, selectable integration intervals. Digital configuration permits a host processor or energy-metering controller to retrieve measurements over I2C or SPI. This makes the device useful where an embedded controller must observe demand, detect overload conditions, record consumption, or expose operating data through a communications bus without building a discrete shunt and analog front end.
Typical installations place the integrated current path in series with a high-current DC supply while the voltage measurement network senses the monitored bus. The 0 V to 15 V voltage range is suited to common low-voltage power rails, and the -65 A to +65 A current range supports chargers, battery systems, industrial supplies, test equipment, and power-distribution modules. Because measured power can reach -975 W to +975 W, designers should select connectors, PCB copper, and thermal construction for the full operating current rather than only the nominal metering range.
The main design consideration is Kelvin routing: voltage and current sense connections should follow the manufacturer's layout guidance so high-current copper drops do not become part of the measurement error. Decoupling must be implemented according to the manufacturer datasheet, and the exposed thermal feature should be connected to suitable PCB copper. Verify the complete pinout and exposed-pad requirements on the official LTC2947-65 documentation before layout release.
This page combines manufacturer product information with distributor availability and packages verified drop-in alternatives only where exact pin compatibility can be established. It also adds engineering-oriented comparisons, PCB cautions, and selection guidance that are not visible in a basic distributor catalog listing.
直接替換替代品，適用於 LTC2947IUHF-65#PBF — 相同封裝，腳位對腳位相容。需重新設計 PCB 的不同封裝零件不列入。
此系列的變體
與下列產品可直接替換的同系列型號： LTC2947IUHF-65#PBF （相同外形與佔位） — 差異在於 Operating Temperature Range, Package.
此產品無可直接替換的替代品。
申請替代品LTC2947IUHF-65#PBF 最大額定值與電氣特性
| Product Type | Single-phase power and energy monitor IC |
| Current Measurement Range | -65 A to +65 A |
| Voltage Measurement Range | 0 V to 15 V |
| Power Measurement Range | -975 W to +975 W |
| Integrated Sense Resistor | 65 A internal sense resistor |
| ADC Architecture | 3 internal No Latency delta-sigma ADCs |
| Power Calculation Method | High-bandwidth analog multiplication of voltage and current |
| Digital Interface | I2C or SPI |
| Clocking | Internal or external clock options |
| 封裝 | 38-QFN, 5 mm × 7 mm |
| Package Code | HVQCCN |
| 安裝類型 | Surface mount |
| Terminal Count | 38 terminals |
| Package Shape | Rectangular |
| 工作溫度範圍 | -40°C to +125°C |
| Recommended Operating Temperature Range | 0°C to 85°C for optimal performance and accuracy |
| Temperature Grade | Industrial |
| PBF Packaging Indicator | Lead-free part designation |
LTC2947IUHF-65#PBF rectangular 腳位配置指南
LTC2947IUHF-65#PBF（rectangular 封裝）的腳位配置。 此功率元件具有閘極、汲極與源極端子。對於非極性封裝，請參閱製造商資料表以取得確切的第 1 腳方向與佈局詳細資訊。常見應用包括電源設計、馬達驅動與負載切換。
無詳細腳位定義資料： LTC2947IUHF-65#PBF.
請參閱 資料表 以查看完整腳位配置。
典型應用
LTC2947IUHF-65#PBF 適用於 6 應用s: Battery Charging and Energy Storage, Industrial DC Power Supply Monitoring, Server and Data-Center Power Distribution, Power-Distribution Modules and Load Switches, Test and Measurement Systems, EV Charging and Mobile Power Systems.
Battery Charging and Energy Storage
LTC2947IUHF-65#PBF fits battery systems that need both charge and reverse-current visibility. Its -65 A to +65 A range captures opposite current directions, while the 0 V to 15 V measurement range covers many low-voltage packs. The integrated 65 A sense resistor simplifies the high-current path, and the ±975 W power range provides telemetry for host-side charge control and logging. Engineers must still add charger, cell protection, fusing, and fault-current handling, and must follow the manufacturer Kelvin layout to keep copper resistance from degrading accuracy.
推薦
Industrial DC Power Supply Monitoring
The LTC2947IUHF-65#PBF can monitor a low-voltage industrial DC bus when nominal voltage is no greater than the specified 15 V measurement ceiling and operating current is no greater than 65 A in magnitude. Three internal delta-sigma ADCs and analog power multiplication provide the measurements needed for load diagnostics, energy accounting, and host alarms. The industrial temperature grade is useful, although the supplied source recommends 0°C to 85°C for best performance. PCB busbars, copper width, connectors, and ambient-temperature derating remain critical at sustained high current.
推薦
Server and Data-Center Power Distribution
LTC2947IUHF-65#PBF is suitable for a power-distribution module that must measure high-current DC input and expose energy data to a supervisory controller. Its integrated sense resistor avoids a discrete shunt, and I2C or SPI provides a digital path to a power-management microcontroller. The measurement envelope of -65 A to +65 A covers substantially more than many board shunts, although the 0 V to 15 V monitored range may require an appropriate interface for higher-voltage systems. Redundancy, isolation, hot-swap behavior, and fault response must be designed at the system level.
推薦
Power-Distribution Modules and Load Switches
The LTC2947IUHF-65#PBF can be integrated into a monitored power-distribution module where downstream load, fault status, and accumulated energy must be visible to a controller. Its three internal ADCs support voltage and bidirectional current measurement, while analog multiplication avoids relying only on sampled software multiplication. With a current measurement range of ±65 A and a power range of ±975 W, it targets substantial low-voltage loads. Placement next to the high-current path is important because long, narrow copper runs increase voltage loss and heat, and Kelvin connections must reference the intended sense points.
推薦
Test and Measurement Systems
LTC2947IUHF-65#PBF fits laboratory power-test fixtures that need digital voltage, current, power, and energy readings. The bidirectional ranges allow the same instrument channel to observe forward load, reverse discharge, or regeneration, while internal or external clocking supports repeatable energy integration. A host computer can read results through I2C or SPI and log them over time. Calibration strategy, sense-path layout, fixture parasitics, and the 15 V measurement ceiling should be established before test limits are defined.
推薦
EV Charging and Mobile Power Systems
LTC2947IUHF-65#PBF is relevant to portable and vehicle-like power systems that combine high-current charging with energy accounting. Its ±65 A range supports substantial DC paths, and the integrated 65 A sense resistor helps reduce the number of high-current sensing components. The device can report load behavior to a charging controller through I2C or SPI, enabling logging, thermal management, and fault detection. It does not enforce current limits or provide vehicle isolation by itself, so automotive qualification, contactors, precharge, insulation, and safety controls must be supplied elsewhere.
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工程參考資料，適用於 LTC2947IUHF-65#PBF — 比較、設計指引及合規資訊。
選型指南
與替代品比較
| 參數 | 本產品 |
|---|---|
| Package | 38-QFN, 5 mm × 7 mm |
| Brand | Analog Devices |
| Current Measurement Range | -65 A to +65 A |
| Voltage Measurement Range | 0 V to 15 V |
| Power Measurement Range | -975 W to +975 W |
| Current Sensing | Integrated 65 A sense resistor |
| ADC Architecture | 3 internal No Latency delta-sigma ADCs |
| Digital Interface | I2C or SPI |
| Operating Temperature Range | -40°C to +125°C; 0°C to 85°C recommended for optimal performance and accuracy |
| Temperature Grade | Industrial |
主要差異化特點
- High-current sensing is integrated into the meter (對比Discrete shunt-and-ADC designs)
- Bidirectional power measurement covers regeneration (對比Unidirectional current monitors)
- Power is calculated with dedicated analog multiplication (對比Host-computed power measurements)
- Three measurement ADCs support an integrated energy-metering channel (對比Single-channel analog monitors)
設計說明
Use the manufacturer reference layout and Kelvin-routing pattern so the voltage measurement references the intended copper nodes rather than the voltage drop across the package or PCB current path. At ±65 A, even a small trace resistance can create a meaningful measurement error and heat. Keep sense traces away from high-current switching nodes, minimize loop area, and verify the exposed-pad connection against the official land pattern before fabrication.
Treat copper loss, connector loss, and IC dissipation as a coupled thermal design problem. The integrated 65 A sense path removes an external shunt but does not eliminate heat in the PCB and package. Use the manufacturer limits for continuous current, pulse current, junction temperature, and exposed-pad construction; those detailed values were not present in the supplied excerpts. Avoid estimating allowable rise from package size alone, and derate current when ambient temperature or airflow is unfavorable.
Place input and output bypass capacitors where the manufacturer datasheet directs, maintain short high-current paths, and provide adequate copper around all connected terminals. Inspect whether terminals, exposed pads, and lead-free package dimensions match the exact IUHF ordering code. Because no verified public pin list was included in the prompt, do not assign nets from package-count assumptions; cross-check every terminal against the official datasheet and footprint.
Do not confuse the 0 V to 15 V monitored bus range with the complete list of allowable supply-pin voltages, or assume all ±65 A operating conditions are safe for arbitrary PCB layouts. Also do not infer RoHS, REACH, or AEC-Q100 compliance from the #PBF suffix. Check absolute maximum ratings, recommended operating conditions, current derating, exposed-pad handling, and lifecycle status using the current Analog Devices documentation.
合規資訊
The #PBF ordering designation supports lead-free status, but the supplied evidence does not explicitly document RoHS, REACH, halogen-free, conflict-minerals, or AEC-Q100 status. The industrial temperature grade does not establish automotive qualification.
