MAX140EPL+ - 3.5-Digit LED Display ADC | Maxim Integrated
Артикул: MAX140EPL+ ✓ АктивенMAX140EPL+ Обзор
An ADC is an analog-to-digital converter, a semiconductor within the data-acquisition and signal-processing hierarchy. The MAX140 belongs to the specialized LED display driver category because its conversion results are intended for direct use with common-anode or common-cathode seven-segment LED displays. Its dual-slope architecture integrates measurement, reference, and display-driving functions into one device instead of requiring a general-purpose converter and separate display interface.
The MAX140EPL+ provides 3.5-digit resolution, one ADC channel, a 40-DIP package, through-hole mounting, and an industrial temperature-grade designation. It is identified as a low-segment-current version of the MAX139, making it appropriate when display current and power consumption are important design constraints. The MAX140 series also includes related MAX138 and MAX139 devices, and the manufacturer identifies the MAX138 and MAX139 operating circuits as similar to the ICL7136 and ICL7137 families.
Its dual-slope conversion method is suitable for panel-meter measurements where stable readings and direct numeric display presentation are more important than high-speed sampling. The product-page information identifies reference and charge-pump functions within the device, while the MAX140 family description identifies an internal oscillator approach used with related family members. Exact conversion timing, input ranges, accuracy limits, and display-drive current are not included in the supplied verified data and should therefore be confirmed in the manufacturer datasheet before design release.
Typical uses include digital panel meters, process-monitoring instruments, laboratory measurement equipment, counters, and embedded industrial displays. A designer can connect the analog measurement input, provide the required reference and charge-pump components, and route the converter outputs to a multiplexed seven-segment display. The 40-pin DIP format is especially convenient for legacy instruments, prototypes, and through-hole industrial control boards where reworkability and socket-based assembly remain important.
The principal design consideration is component availability. Verified distributor listings show MAX140EPL+ inventory and quote-on-request channels, but the supplied data does not establish a complete lifecycle statement or guaranteed long-term supply. Confirm the current manufacturer product page, electrical characteristics, pinout, and display-interface compatibility before committing a new production design. This page consolidates verified distributor pricing, package information, family references, and replacement analysis to support initial component selection.
Аналоги без доработки для MAX140EPL+ — тот же корпус, pin-to-pin совместимость. Компоненты в других корпусах, требующие переработки PCB, исключены.
MAX140CPL+
✅ Прямая замена📋 Справочный аналог (нет в каталоге)
MAX140CPL
✅ Прямая замена ⚠️ Характеристики не проверены📋 Справочный аналог (нет в каталоге)
MAX140EPL
✅ Прямая замена ⚠️ Характеристики не проверены📋 Справочный аналог (нет в каталоге)
MAX140EPL+ Максимальные параметры и электрические характеристики
| ADC Type | Dual-slope ADC |
| ADC Resolution | 3.5 digits |
| Number of ADC Channels | 1 channel |
| Primary Function | LED display driver and panel-meter ADC |
| Converter Architecture | Dual slope |
| Reference | Internal reference function |
| Charge-Pump Function | Charge-pump circuitry |
| Display Resolution | 3.5 digits |
| Segment Current Profile | Low segment current |
| Корпус | 40-DIP (0.600 in, 15.24 mm) |
| Package Type | 40-pin DIP |
| Тип монтажа | Through-hole |
| Lead Pitch | 0.600 in (15.24 mm) |
| Number of Terminals | 40 terminals |
| Package Shape | Rectangular |
| Temperature Grade | Industrial |
| Статус RoHS | Compliant |
Руководство по цоколевке MAX140EPL+ в корпусе rectangular
Цоколевка для MAX140EPL+ (корпус rectangular). Этот аналоговый компонент имеет выводы входа, выхода и питания. Обратитесь к техническому описанию производителя для конфигураций выводов балансировки нуля, коррекции и разрешения. Идеально подходит для схем обработки сигналов и усилителей.
Нет подробных данных о распиновке для MAX140EPL+.
Обратитесь к даташиту для полной конфигурации выводов.
Типичное применение
MAX140EPL+ подходит для 6 применениеs: Digital Panel Meters, Industrial Process Monitoring, Laboratory Measurement Instruments, Digital Counters and Timers, Environmental and Utility Displays, Legacy Through-Hole Instrument Control.
Digital Panel Meters
The MAX140EPL+ is well matched to digital panel meters because it combines a 3.5-digit, one-channel dual-slope ADC with LED-display-driver circuitry. It can convert a measured analog quantity into a three-digit numerical display while keeping the external display current low, an important consideration for continuously energized instruments. The 40-pin DIP format supports legacy panel-meter boards and prototype assemblies. Before layout, verify the input range, reference accuracy, segment-drive current, and complete 40-pin connection requirements against the manufacturer datasheet, since those numerical limits are not included in the supplied search data.
Рекомендуется
Industrial Process Monitoring
The MAX140EPL+ suits industrial process-monitoring equipment that presents a measured process variable directly on an LED display. Its single-channel dual-slope conversion format is intended for measurement and panel presentation rather than high-speed waveform acquisition, while the industrial E temperature-grade designation identifies it for the appropriate equipment class. The low-segment-current MAX140 role can reduce display power in continuously operating panels. System designers should confirm the verified ambient-temperature limits, input range, accuracy, and grounding arrangement, none of which are supplied in the current verified snippets.
Рекомендуется
Laboratory Measurement Instruments
A laboratory display instrument can use the MAX140EPL+ to convert one measured analog signal into a stable three-digit LED indication. The 3.5-digit resolution and integrated reference and charge-pump functions support the conventional digital-panel-meter architecture, while the 40-pin DIP simplifies construction of a through-hole instrument board. The device is most appropriate when a readable numerical result is required rather than rapid sampled data. Confirm input-reference stability, conversion timing, calibration behavior, and display-drive compatibility with the manufacturer datasheet before using it as the front end of a precision laboratory reading.
Рекомендуется
Digital Counters and Timers
The MAX140EPL+ can provide the numerical display path for a counter or timer built around a one-channel measurement interface. Its 3.5-digit readout is suitable for instrument counters that display up to three digits and include an over-range indication, while the low-segment-current design supports efficient LED operation. The through-hole 40-DIP package also makes it convenient for replacement in older educational, service, or industrial test equipment. The designer must still verify input polarity, conversion interval, output-drive topology, and pin functions in the original datasheet because those details are absent from the supplied distributor summaries.
Рекомендуется
Environmental and Utility Displays
The MAX140EPL+ is applicable to compact environmental or utility instruments that display one measured quantity, such as a temperature, pressure, or flow value, on a three-digit LED panel. Its low-segment-current orientation helps address the continuous power demand of the display, and the industrial temperature-grade designation supports its use in suitable equipment environments. The single-channel dual-slope architecture simplifies a direct measurement-and-display signal chain. Exact sensor excitation, signal conditioning, electrical limits, and display configuration must be designed from the manufacturer datasheet and validated across the required temperature range.
Рекомендуется
Legacy Through-Hole Instrument Control
The MAX140EPL+ is particularly useful when maintaining or reproducing legacy through-hole instrumentation because it uses a 40-pin DIP rather than a fine-pitch surface-mount package. The 0.600-inch, or 15.24 mm, lead pitch simplifies manual assembly, socket use, inspection, and prototype rework compared with a dense quad package. Its 3.5-digit dual-slope conversion and low-current display-drive role preserve the architecture of many panel meters. For a repair, compare every pin function and electrical limit with the installed device; for a new design, obtain complete manufacturer pinout data and current availability before releasing the schematic.
Рекомендуется
Сводка рекомендуемых товаров
Справочные инженерные данные для MAX140EPL+ — сравнение, рекомендации по проектированию и информация о соответствии.
Руководство по выбору
Сравнение с аналогами
| Параметр | Этот товар | MAX140CPL+ | MAX140CPL | MAX140EPL |
|---|---|---|---|---|
| Package | 40-DIP (0.600 in, 15.24 mm) | 40-DIP (0.600 in, 15.24 mm) | 40-DIP (0.600 in, 15.24 mm) | 40-DIP (0.600 in, 15.24 mm) |
| Brand | Maxim Integrated | Maxim Integrated | Maxim Integrated | Maxim Integrated |
| ADC Resolution | 3.5 digits | 3.5 digits | 3.5 digits | 3.5 digits |
| Converter Architecture | Dual slope | Dual slope | Dual slope | Dual slope |
| Number of ADC Channels | 1 channel | 1 channel | 1 channel | 1 channel |
| Mounting Type | Through-hole | Through-hole | Through-hole | Through-hole |
| Primary Function | LED display driver with 3.5-digit ADC | LED display driver with 3.5-digit ADC | 3.5-digit ADC in MAX140 family | 3.5-digit ADC in MAX140 family |
Ключевые отличия
- Industrial-grade ordering designation (против MAX140CPL+)
- Same 3.5-digit measurement resolution (против MAX140CPL)
- Direct three-digit panel-meter function (против MAX140EPL)
Заметки по проектированию
Use the verified 40-pin, 0.600-inch-pitch DIP footprint and confirm every signal name against the manufacturer pinout before releasing PCB artwork. The supplied data establishes package dimensions and lead pitch but does not provide the complete pin numbering or no-connect assignments. Provide unobstructed access to the IC pins, maintain appropriate clearance from conductive enclosure hardware, and route the analog input away from display-switching and digital timing traces.
Calculate the display load from the selected LED configuration, number of active digits, and the MAX140 segment-current limit once that limit is obtained from the manufacturer datasheet. The MAX140 is specifically a low-segment-current device, but low current does not eliminate supply decoupling or display-driver thermal checks. Verify reference, charge-pump, logic, and display-supply requirements rather than assuming that a single supply can safely serve every internal circuit.
Do not substitute the MAX140CPL+ solely because it has the same 40-DIP outline. The supplied comparison results indicate similar function and broadly consistent characteristics, but the suffix changes the temperature-grade designation, and complete electrical limits are unavailable. For every proposed MAX140CPL, MAX140CPL+, or MAX140EPL substitute, compare supply voltage, input range, conversion timing, accuracy, display-drive configuration, reference behavior, and pin functions before installation.
Protect the analog measurement path from LED-driver and digital timing interference by using a compact, shielded input route and a single ground reference according to the manufacturer application guidance. Place external reference and charge-pump components close to their associated pins, observe their required stability and tolerances, and keep switching or multiplexed display signals away from the input node. Validate the assembled board for offset, noise, and display flicker at the intended conversion and refresh settings.
Информация о соответствии
The verified Mouser MAX140 series listing identifies the MAX140EPL+ as RoHS compliant. No verified REACH, AEC-Q100, halogen-free, conflict-minerals, or lead-free statement was supplied.
