MAX134EPL+ - 3.75-Digit DMM ADC | Maxim Integrated | 40-DIP
部品番号: MAX134EPL+ ✓ 生産中| 数量 | 単価 | 小計 |
|---|---|---|
| 1 | $30.114 | $30.11 |
| 10 | $30.114 | $301.14 |
| 100 | $30.114 | $3,011.40 |
| 500 | $30.114 | $15,057.00 |
| 1,000 | $30.114 | $30,114.00 |
MAX134EPL+ 概要
A DMM ADC is a specialized analog-to-digital converter optimized for stable readings from meters, resistive dividers, and current-shunt inputs. Its measurement chain converts an analog voltage or resistance-derived voltage into a multiplexed digital result for a display or controller. The MAX134 evaluation kit demonstrates this use case by measuring volts, ohms, or milliamps and displaying results on a 4-digit LCD under control of a MAXQ2000 microcontroller.
The MAX134EPL+ provides a 3.75-digit measurement format and a proprietary conversion method, making it appropriate for panel meters, laboratory instruments, service equipment, and industrial readouts that prioritize decimal display resolution rather than high-speed sampling. The verified distributor listing classifies the device as an ADC/DAC for special-purpose 3-digit DMM circuits, while the manufacturer product page describes the MAX134 family as a production 3¾-digit DMM circuit.
Its 40-pin PDIP package exposes the dedicated functions required by the DMM signal path and associated control circuitry. Through-hole construction also suits repairable industrial and laboratory instruments, although the larger 40-pin footprint requires more board area than modern mixed-signal packages. The exact pin assignments, reference requirements, acquisition time, input architecture, and electrical limits must be confirmed against the manufacturer datasheet before layout or replacement qualification.
Typical uses include digital voltmeters, resistance meters, milliammeters, panel instruments, and educational measurement platforms. In each case, the MAX134 performs the core measurement conversion while external analog switching, reference components, display electronics, and control logic complete the instrument. Because its output is optimized for DMM measurements, it should not be assumed interchangeable with a general-purpose ADC without confirming resolution, conversion timing, interface protocol, reference voltage, and pinout.
For a new design, use the manufacturer MAX134 documentation and evaluation-kit schematic as the primary references. Confirm the analog input range, front-end multiplexing, reference accuracy, LCD-driving interface, grounding, and bypass requirements before layout. If replacing MAX134EPL+, verify both the 40-pin PDIP footprint and pin-by-pin behavior; package similarity alone does not establish compatibility.
This page consolidates verified manufacturer and distributor information, distinguishes the component from generic ADCs, and adds practical selection and sourcing guidance beyond the basic catalog entry.
ドロップイン代替品: MAX134EPL+ — 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:
MAX134CPL+
✅ ドロップイン📋 参考代替品（カタログ未掲載）
MAX134EPL+ 最大定格＆電気的特性
| ADC Resolution | 3.75 digits |
| Output Resolution | 4-bit ADC |
| Conversion Method | Proprietary method |
| Device Type | Special-purpose 3-digit DMM ADC |
| 電源電圧 | 5 V |
| 動作温度範囲 | -40°C to +85°C |
| Temperature Grade | Industrial |
| Package Code | DIP |
| Package Shape | Rectangular |
| Terminal Form | Through-hole |
| Number of Terminals | 40 |
| 実装タイプ | Through-hole |
| Manufacturer Family | MAX134 |
| Production Status | Production |
| DMM Measurement Modes | Volts, ohms, or milliamps |
| Evaluation Display | 4-digit LCD display |
| Evaluation Controller | MAXQ2000 microcontroller |
| Evaluation PC Communication | Optoisolated USB link |
MAX134EPL+ rectangular ピン配置ガイド
MAX134EPL+ (rectangular パッケージ) のピン配置。 このアナログコンポーネントは、入力、出力、および電源ピンを備えています。オフセットナル、補償、イネーブルピンの設定については、メーカーのデータシートを参照してください。信号調整やアンプ回路に最適です。
詳細なピン配置データはありません: MAX134EPL+.
詳細は データシート をご参照ください。
主な用途
MAX134EPL+ の用途: 6 件s: Digital Voltmeter, Digital Resistance Meter, Milliammeter and Current Meter, Industrial Panel Meter, Portable Test Instrument, Lab and Service Measurement Equipment.
Digital Voltmeter
The MAX134EPL+ fits a digital voltmeter because it is a dedicated 3.75-digit DMM conversion circuit operating from a 5 V supply. It can form the measurement core while external input protection, range selection, reference circuitry, and display logic condition and present the voltage. The verified MAX134 evaluation kit specifically measures volts, demonstrating the intended architecture. Its industrial -40°C to +85°C rating supports instrument designs requiring a wide ambient range. Before layout, engineers must confirm the input range, sampling behavior, pin assignments, and reference requirements in the manufacturer data sheet.
おすすめ
Digital Resistance Meter
A resistance-measurement instrument can use the MAX134EPL+ after an excitation source and analog front end convert resistance into a measurable voltage. The dedicated 3.75-digit conversion format suits decimal display resolution, while the 5 V supply aligns the IC with conventional DMM signal conditioning. The MAX134 evaluation kit verifies ohms measurement as a supported use case. The -40°C to +85°C industrial range benefits portable or workshop instruments. Exact source-current accuracy, input resistance, reference stability, and conversion timing must be designed from the MAX134 documentation rather than inferred from the 4-bit output description.
おすすめ
Milliammeter and Current Meter
The MAX134EPL+ is suitable for the conversion stage of a milliammeter because current is commonly conditioned into a voltage before digitization and the MAX134 evaluation kit explicitly supports milliamps measurement. Its 3.75-digit format is appropriate for readable panel results, and its industrial temperature rating supports equipment exposed to -40°C to +85°C. The external shunt, amplifier or switched-resistor network, current protection, and display remain application-specific. Validate burden voltage, common-mode limits, scaling, and acquisition time using the family data sheet before connecting the circuit to a high-energy source.
おすすめ
Industrial Panel Meter
The MAX134EPL+ can serve as the acquisition device in an industrial panel meter where a compact decimal result is more useful than high-rate waveform data. Its 3.75-digit format supports direct interpretation on a multi-digit display, while the -40°C to +85°C range covers demanding ambient conditions. The DIP package is repairable and easy to socket or route on instrument boards, although it occupies much more PCB area than a compact mixed-signal package. Design the analog switch, reference, calibration memory, and display timing around the manufacturer-recommended circuit rather than treating it as a generic low-speed ADC.
おすすめ
Portable Test Instrument
A portable volt-ohm-amp meter can adopt MAX134EPL+ because it combines a DMM-specific conversion function with a 3.75-digit result format and a 5 V operating supply. The MAX134 evaluation kit measures volts, ohms, and milliamps, providing a verified application framework for a mixed-function instrument. The industrial temperature range supports environments beyond room temperature. Designers should prioritize low-power operation, input protection, reference stability, LCD compatibility, and calibrated range switching. Because acquisition and pin details are absent from the retrieved search results, use the manufacturer data sheet and evaluation design before release.
おすすめ
Lab and Service Measurement Equipment
MAX134EPL+ fits laboratory and service equipment intended to measure DC voltage, resistance, or current with a readable decimal result. Its 4-bit ADC output and 3.75-digit DMM presentation reduce the display-processing burden compared with designing every front-end convention from scratch. Through-hole PDIP construction also simplifies replacement in field-serviceable instruments. Calibration quality will depend on the reference, analog paths, protection networks, and layout rather than the nominal display count alone. Technicians and engineers should follow the MAX134 evaluation-kit architecture and verify accuracy, noise, conversion time, and reference limits in the official data sheet.
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: MAX134EPL+ — 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 | MAX134CPL+ |
|---|---|---|
| Package | PDIP-40 | PDIP-40 |
| Brand | Maxim Integrated | Maxim Integrated |
| ADC Resolution | 3.75 digits | 3.75 digits |
| Terminals | 40 | 40 |
| Mounting Type | Through-hole | Through-hole |
主な差別化要因
- Purpose-built DMM conversion rather than generic ADC operation （vs Generic 4-bit ADC)
- Verified industrial temperature capability （vs MAX134CPL+)
- Supported multi-function DMM measurement （vs General-purpose low-resolution ADC)
設計ノート
Use the MAX134 evaluation-kit schematic and official data sheet as the layout baseline. The verified search data does not expose individual terminal assignments, so do not infer routing from the 40-pin count. Preserve short analog paths between the front end, reference network, and MAX134; provide local supply bypassing; and isolate display and switching-control traces from sensitive measurement nodes. Validate the final layout for range-switch transients and reference stability.
The verified supply requirement is 5 V. Confirm every IC operating from that rail and check its current demand against the design budget. Place regulator and bypass components where their transient current can reach MAX134EPL+ without long supply loops. Reference-voltage accuracy should be budgeted separately from ADC resolution because a correct 4-bit conversion does not guarantee calibrated DMM accuracy. Use measured noise and temperature drift in the final error budget.
Do not substitute a generic 4-bit ADC solely because its output width matches. MAX134EPL+ is a dedicated 40-pin DMM circuit with measurement-mode, timing, reference, and interface requirements that may not match general-purpose converters. For repair or redesign, compare every pin, supply level, acquisition method, calibration characteristic, and package orientation. MAX134CPL+ is the only replacement strongly supported by the supplied cross-reference evidence.
The 40-pin through-hole DIP makes the circuit easy to inspect and service but consumes substantial board area. Keep analog and digital return currents disciplined, place protection components before long unprotected routes, and avoid routing display-control signals beneath sensitive measurement nodes. Because no public pin table was present in the retrieved data, complete symbol, footprint, and layout release only after checking the current manufacturer pin description.
コンプライアンス情報
The verified results identify an industrial-temperature MAX134 DMM circuit but do not state RoHS, REACH, halogen-free, lead-free, conflict-minerals, or automotive qualification status. AEC-Q100 is treated as not applicable because no automotive qualification is identified.
