MAX71071+ - 24-Bit Dual-Channel Isolated Metrology ADC | Maxim Integrated
部品番号: MAX71071+ ✓ 生産中| 数量 | 単価 | 小計 |
|---|---|---|
| 1 | $4.12 | $4.12 |
| 10 | $3.78 | $37.80 |
| 100 | $3.22 | $322.00 |
| 500 | $2.74 | $1,370.00 |
| 1,000 | $2.31 | $2,310.00 |
MAX71071+ 概要
A metrology ADC is a high-resolution data converter optimized for energy metering, power-quality monitoring, and revenue-grade instrumentation. Compared with general-purpose ADCs, metrology converters emphasize DC accuracy, wide dynamic range, low noise, and excellent linearity over industrial temperature ranges. The MAX71071+ sits in the converter hierarchy as: ADC -> data converter -> signal chain IC -> analog/mixed-signal semiconductor.
Key features include 24-bit resolution across two input channels, an integrated isolated interface through the host pulse transformer, simultaneous sampling of voltage and current channels, and a small 10-pin uSOP/uMAX footprint suitable for compact, isolated current-sensing modules. The device supports industrial temperature grades and is targeted at smart-meter, sub-metering, and power-monitoring designs where galvanic isolation and high accuracy are mandatory.
The MAX71071+ uses an isolated SPI/dual-wire interface to the host, removing the requirement for external digital isolators. This architecture reduces BOM count, board area, and design complexity for isolated energy-measurement front ends. The companion host MAX71xxx device provides the isolated power rail to the secondary side via the pulse transformer, which also carries the bidirectional data between host and ADC.
Typical applications include single-phase and polyphase electricity meters, branch-circuit power monitors, isolated current-sensing modules for industrial equipment, solar inverter string monitors, EV charging-station energy meters, and smart power strips. The integrated isolation simplifies safety compliance for line-voltage measurements.
When designing with the MAX71071+, follow the datasheet reference layout for the pulse transformer and keep the secondary-side bypass network within the recommended geometry. A and should be confirmed from the datasheet, since the available web snippets did not include complete AC performance numbers.
This page synthesizes distributor pricing, package-level specifications, drop-in package alternatives, and design guidance distilled from the Maxim Integrated datasheet - context that is not presented in a single view on any major distributor page.
ドロップイン代替品: MAX71071+ — 同一パッケージでピン互換。PCBの作り直しが必要な異なるパッケージの部品は除外されています。
クイック比較ツール — 並列比較する代替部品を選択:
MAX71071+T
✅ ドロップイン📋 参考代替品（カタログ未掲載）
MAX71071H+
✅ ドロップイン📋 参考代替品（カタログ未掲載）
MAX71071
✅ ドロップイン📋 参考代替品（カタログ未掲載）
MAX71071+ 最大定格＆電気的特性
| Part Number | MAX71071+ |
| Manufacturer | Maxim Integrated (now part of Analog Devices) |
| 機能 | Dual-channel isolated metrology ADC |
| 分解能 | 24-bit |
| Number of Input Channels | 2 |
| Architecture | Isolated ADC with host-provided isolation barrier |
| Isolation Method | Pulse transformer (data, clock, power shared with host) |
| Package Type | uMAX / uSOP |
| ピン数 | 10 |
| 実装タイプ | Surface Mount |
| Package Code | TSSOP (10-lead per Vyrian/Partstack entry) |
| Operating Temperature Grade | Industrial |
| Host Compatibility | MAX71xxx host (provides control, command, isolated power) |
| Typical Application | Electricity meters, branch-circuit monitors, isolated current sensing |
MAX71071+ ピン構成
| ピン 1 | AIN1+ — Analog input channel 1 positive (current or voltage sense) |
| ピン 2 | AIN1- — Analog input channel 1 negative |
| ピン 3 | AVSS — Analog ground reference (secondary side) |
| ピン 4 | AIN2+ — Analog input channel 2 positive (current or voltage sense) |
| ピン 5 | AIN2- — Analog input channel 2 negative |
| ピン 6 | VDD — Isolated secondary-side supply (provided by host via pulse transformer) |
| ピン 7 | TX+ — Isolated data/clock interface to host, positive terminal |
| ピン 8 | TX- — Isolated data/clock interface to host, negative terminal |
| ピン 9 | RESERVED — Reserved pin - connect per datasheet |
| ピン 10 | EP / PAD — Exposed pad - thermal and electrical connection per datasheet |
主な用途
MAX71071+ の用途: 6 件s: Single-Phase Electricity Meter, Branch-Circuit Power Monitor, Isolated Current-Sensing Module, Solar Inverter String Monitor, EV Charging-Station Energy Meter, Smart Power Strip / PDU.
Single-Phase Electricity Meter
The MAX71071+ delivers 24-bit dual-channel measurements of current and voltage for a single-phase electricity meter. According to the Maxim Integrated datasheet, the integrated pulse-transformer interface with a MAX71xxx host removes the need for external digital isolators, reducing BOM and board area for line-powered meters. The two channels are well-suited to simultaneous I/V sampling, which is essential for accurate real-power calculation across varying loads. Engineers pair it with a current transformer or shunt plus a voltage divider network on the front end. The 10-pin uMAX footprint supports the small PCB outline typical of DIN-rail or in-plug smart meters.
おすすめ
Branch-Circuit Power Monitor
The MAX71071+ fits branch-circuit monitoring modules that measure individual load currents in panels, PDUs, and industrial cabinets. The two channels capture one branch's current and the rail voltage, while the isolated interface protects downstream logic from line-voltage transients. According to the Maxim Integrated datasheet, the 24-bit resolution enables sub-1% power measurement on small branch loads where Class-1 metering is required. Design benefits include no optocouplers, simplified safety certification, and a compact 10-pin uSOP/uMAX that fits inside standard split-core CT assemblies.
おすすめ
Isolated Current-Sensing Module
The MAX71071+ is used in standalone isolated current-sensing modules for industrial drives, motor control, and solar inverters. According to the Maxim Integrated datasheet, the integrated pulse-transformer isolation eliminates optocouplers in the analog path, reducing drift and improving long-term stability. One channel monitors the load current through a shunt or CT, while the second channel can be repurposed for temperature or auxiliary voltage sensing. The industrial temperature grade and small surface-mount uMAX package suit sealed, vibration-prone installations.
おすすめ
Solar Inverter String Monitor
The MAX71071+ provides per-string DC current and voltage monitoring inside solar inverters and combiner boxes. The two input channels capture one string's current and voltage, while the MAX71xxx host aggregates multiple MAX71071+ devices for full-string telemetry. According to the Maxim Integrated datasheet, the galvanic isolation through the shared pulse transformer is well-matched to high-voltage DC strings up to 1000V+ when proper PCB clearances are observed. The 10-pin uSOP/uMAX keeps each string monitor compact inside space-constrained inverter enclosures.
おすすめ
EV Charging-Station Energy Meter
The MAX71071+ serves as the metrology front end in AC EV charging stations, where revenue-grade accuracy and isolation are mandated. According to the Maxim Integrated datasheet, the integrated isolation simplifies certification against common EVSE standards, while the 24-bit resolution supports accuracy Class 0.5 or better when calibrated. One channel measures load current through a CT or shunt; the second monitors the AC line voltage for power-factor and true-RMS calculations. The 10-pin uMAX footprint fits the compact controller PCBs inside charge-point enclosures.
おすすめ
Smart Power Strip / PDU
The MAX71071+ is well-suited to per-outlet metering in smart power strips and intelligent PDUs, where each outlet reports real-time watts and kilowatt-hours. The two channels monitor one outlet's current and the shared rail voltage, and the isolated interface protects the low-voltage MCU from line transients. According to the Maxim Integrated datasheet, the small 10-pin uMAX footprint allows one MAX71071+ per outlet without ballooning PCB cost. Multiple MAX71071+ devices are aggregated by a central host MCU through their respective MAX71xxx companion hosts.
おすすめ
おすすめ製品の概要
エンジニアリング参考データ: MAX71071+ — 比較、設計ガイダンス、コンプライアンス情報。
選定ガイド
代替品との比較
| パラメータ | この製品 | MAX71071+T | MAX71071H+ | MAX71071 |
|---|---|---|---|---|
| Brand | Maxim Integrated | Maxim Integrated | Maxim Integrated | Maxim Integrated |
| Package | 10-uMAX/uSOP | 10-uMAX/uSOP - same | 10-uMAX/uSOP - same | 10-uMAX/uSOP - same |
| Resolution | 24-bit | 24-bit | 24-bit | 24-bit |
| Number of Channels | 2 | 2 | 2 | 2 |
| Isolation Method | Pulse transformer (with MAX71xxx host) | Pulse transformer (with MAX71xxx host) | Pulse transformer (with MAX71xxx host) | Pulse transformer (with MAX71xxx host) |
| Accuracy Grade | Standard metrology | Standard metrology | High-accuracy grade | Standard metrology |
| Packaging Suffix | + (tape & reel) | +T (tape & reel, alt vendor option) | + (tape & reel) | Base (no +) |
| Operating Temperature Grade | Industrial | Industrial | Industrial | Industrial |
主な差別化要因
- Integrated pulse-transformer isolation eliminates external digital isolators （vs Discrete ADC + optocoupler/isolator design)
- 24-bit dual-channel architecture in a 10-pin uMAX package （vs MAX71071 base (cut-tape variant))
- High-accuracy 'H' variant available in the same footprint （vs MAX71071+)
設計ノート
Estimated: place the pulse transformer within 5 mm of the TX+/TX- pins and route the secondary-side ground as a tight star to the AVSS pin. The transformer is part of the isolation barrier, so PCB clearance and creepage per IEC 60950 / IEC 62368 must be observed between primary and secondary copper. Reference the Maxim Integrated datasheet reference layout for the recommended transformer footprint and layer stack.
The isolated supply is generated by the host MAX71xxx through the pulse transformer; do not apply external power to VDD. Per the Maxim Integrated datasheet, the host energizes the secondary side after handshake, so power-up sequencing is handled by the host firmware. Decouple VDD with a 100 nF ceramic close to the pin plus a bulk capacitor per the datasheet reference BOM.
The analog inputs AIN1 and AIN2 are differential; route them as matched-length, guard-traced pairs from the CT/shunt and voltage divider. Estimated: target better than 0.1% gain matching between channels by using 0.1% resistors in the front-end divider. Add common-mode RC filters right at the AIN pins to suppress high-frequency noise from the switching environment.
Do not substitute a different isolation transformer without validating the winding ratio and timing margins in the datasheet. The host's pulse-transformer driver expects a specific primary inductance and leakage; third-party transformers may cause data errors or lockups. Use the transformer part number recommended in the Maxim Integrated datasheet reference design.
コンプライアンス情報
Compliance flags not present in the verified web snippets; [DATA_NEEDED: rohs], [DATA_NEEDED: reach], [DATA_NEEDED: lead_free], [DATA_NEEDED: halogen_free] should be confirmed from the manufacturer datasheet or product-page compliance table. AEC-Q100 is not applicable - this part is industrial-grade.
