MAX140CPL+ - 3.5-Digit ADC with LED Drivers | Analog Devices
MPN： MAX140CPL+ ✓ 啟用中MAX140CPL+ 概覽
A special-purpose ADC is an integrated circuit optimized for a defined measurement or conversion task rather than general-purpose signal processing. The MAX140 belongs to the ADC and DAC hierarchy within integrated circuits and combines measurement conversion with display-interface functions. Its integrated bandgap reference supports controlled internal conversion references, while the charge-pump circuit supports operation from the specified single low-voltage supply.
The verified product information identifies the MAX140 as a 3.5-digit dual-slope ADC with direct LED drivers. Direct LED-drive capability reduces the external interface burden in digital panel meters because display segments can be driven without separate segment-driver ICs. Bipolar input support allows measurement of signals centered around ground when used with the appropriate external input network. The +2.5V to +7V operating range accommodates conventional low-voltage instrument and panel-meter designs.
The MAX140 family uses the MAX140CPL+ commercial-temperature, 40-pin PDIP configuration, with an operating temperature range of 0°C to +70°C. Its through-hole package supports conventional PCB assembly and hand prototyping. The MAX140 product page identifies the family as production, while distributor listings provide current availability, pricing references, and links to the manufacturer data sheet.
Typical applications include digital panel meters, process-control readouts, laboratory instruments, industrial measurement panels, and dedicated display instruments. In a panel meter, the ADC converts the analog input and the integrated LED drivers illuminate the appropriate digits and indicators. Designers must still implement the specified input conditioning, bypassing, display current, and PCB routing described in the manufacturer documentation.
A key design consideration is that the integrated LED drivers do not remove the need to verify display current limits, segment patterns, input filtering, and supply bypass requirements. Engineers should review the complete pin assignment and application guidance in the MAX140 manufacturer data sheet before layout. This page consolidates verified specifications, pricing references, package data, and cross-reference findings while explicitly identifying engineering details that still require direct datasheet confirmation.
直接替換替代品，適用於 MAX140CPL+ — 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： MAX140CPL+ （相同外形與佔位） — 差異在於 Package.
MAX140EPL+
✅ 直接替換聯絡詢價
查看資料表 →MAX140EPL
✅ 直接替換📋 參考替代品（不在目錄中）
MAX140CPL
✅ 直接替換📋 參考替代品（不在目錄中）
MAX140CPL+ 最大額定值與電氣特性
| ADC Resolution | 3.5 digits |
| Conversion Architecture | Dual-slope ADC |
| Supply Voltage Range | +2.5V to +7V |
| Supply Configuration | Single supply |
| 工作溫度範圍 | 0°C to +70°C |
| 封裝 | 40-pin PDIP |
| Terminal Count | 40 terminals |
| 安裝類型 | Through-hole |
| Reference Type | Integrated bandgap reference |
| Charge Pump | Integrated charge-pump voltage converter |
| Display Output | Direct LED drivers |
| Input Type | Bipolar input |
| Device Category | ADCs/DACs - Special Purpose |
| RoHS 狀態 | Compliant |
| 生命週期狀態 | Production |
MAX140CPL+ 40-pin pdip 腳位配置指南
MAX140CPL+（40-pin pdip 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： MAX140CPL+.
請參閱 資料表 以查看完整腳位配置。
典型應用
MAX140CPL+ 適用於 6 應用s: Digital Panel Meters, Industrial Process Readouts, Laboratory Measurement Instruments, Temperature Measurement Displays, Power Supply Monitoring Displays, Dedicated Digital Indicator Instruments.
Digital Panel Meters
The MAX140CPL+ fits digital panel meters because it combines a 3.5-digit dual-slope ADC with an integrated bandgap reference and direct LED drivers in one 40-pin PDIP device. Its +2.5V to +7V single-supply operation supports conventional regulated instrument rails, while bipolar input acceptance permits measurement signals centered around ground when paired with suitable input conditioning. The integrated LED-drive section can illuminate numerical display segments without a separate segment-driver IC. Before layout, verify the exact segment-drive current, indicator configuration, input filtering requirements, and pin assignments in the manufacturer data sheet.
Industrial Process Readouts
For industrial process readouts, the MAX140CPL+ provides a compact measurement and display solution using its 3.5-digit dual-slope converter, integrated bandgap reference, charge-pump voltage converter, and direct LED drivers. The single +2.5V to +7V supply simplifies low-voltage instrument design, and the 40-pin through-hole package is practical for panel-oriented assemblies. The commercial 0°C to +70°C range limits unrestricted industrial-temperature use, so enclosure temperature must be checked. External input protection, filtering, calibration, and display-current verification remain essential before using it with process sensors.
Laboratory Measurement Instruments
The MAX140CPL+ is well suited to dedicated laboratory instruments that need a numerical rather than high-resolution waveform measurement. Its 3.5-digit dual-slope ADC and integrated bandgap reference support a self-contained measurement channel, while direct LED drivers simplify front-panel numeric displays. Operation from a single +2.5V to +7V supply reduces power-supply complexity compared with a multi-rail implementation. The 0°C to +70°C specification, unverified input span, and unspecified conversion time should be considered when defining instrument accuracy, update rate, environmental requirements, and calibration expectations.
Temperature Measurement Displays
A temperature display can use the MAX140CPL+ when its input network, sensor interface, and 3.5-digit resolution meet the measurement requirement. The bipolar-input ADC accepts a conditioned signal around ground, the integrated bandgap reference supports repeatable conversion, and direct LED drivers can present the measured value on an LED display. Integration reduces the number of separate support ICs compared with a generic ADC plus display-driver approach. Engineers must still confirm sensor linearity, input common-mode range, open- or short-circuit behavior, and update timing because those parameters were not included in the verified data.
Power Supply Monitoring Displays
The MAX140CPL+ can form the measurement and display front end of a compact power-supply monitor. Its +2.5V to +7V single-supply operation allows operation from a regulated low-voltage rail, while the bipolar input capability supports conditioned measurements that cross ground. The 3.5-digit dual-slope ADC and integrated bandgap reference are useful for panel meters that show voltage, current, or derived system values, and direct LED drivers reduce display-interface complexity. The circuit still needs accurate divider or shunt design, input filtering, overvoltage protection, and confirmation of the permitted input range.
Dedicated Digital Indicator Instruments
The MAX140CPL+ fits dedicated digital indicators where a dedicated 3.5-digit readout is more appropriate than a general-purpose converter. The integrated bandgap reference, charge-pump voltage converter, dual-slope ADC, and direct LED drivers create a compact measurement subsystem in a 40-pin PDIP. A single +2.5V to +7V supply simplifies portable or panel-powered instrument construction, and the through-hole package supports conventional assembly. Productization requires checking the 0°C to +70°C commercial-temperature limit, display current, input impedance, conversion interval, and indicator-drive pattern against the manufacturer documentation.
工程參考資料，適用於 MAX140CPL+ — 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 | MAX140EPL+ | MAX140EPL | MAX140CPL |
|---|---|---|---|---|
| Package | 40-pin PDIP | 40-pin PDIP | 40-pin PDIP | 40-pin PDIP |
| Brand | Analog Devices | Analog Devices | Analog Devices | Analog Devices |
| ADC Resolution | 3.5 digits | 3.5 digits | 3.5 digits | 3.5 digits |
| Conversion Architecture | Dual-slope ADC | Dual-slope ADC | Dual-slope ADC | Dual-slope ADC |
| Integrated Reference | Bandgap reference | Bandgap reference | Bandgap reference | Bandgap reference |
| Display Output | Direct LED drivers | Direct LED drivers | Direct LED drivers | Direct LED drivers |
| Input Type | Bipolar input | Bipolar input | Bipolar input | Bipolar input |
主要差異化特點
- Integrated measurement and display functions (對比MAX140EPL+)
- Verified commercial temperature specification (對比MAX140EPL)
- Documented low-voltage single-supply operation (對比MAX140CPL)
設計說明
Do not select a MAX140CPL or MAX140EPL ordering variant solely because all three documented alternatives use a 40-pin DIP format. The verified cross-reference reports that some electrical characteristics differ even though the functional characteristics are broadly consistent. Before substitution, compare the exact pin functions, temperature grade, input range, accuracy, conversion timing, LED-drive limits, and supply current in the manufacturer documentation. A matching package is necessary for PCB reuse but does not by itself prove application compatibility.
Plan the MAX140CPL+ around its documented single +2.5V to +7V supply range. Place required bypass capacitors close to the supply and ground pins, and use the manufacturer reference layout and component values. Because the device includes a charge-pump voltage converter, grounding and return-current paths should be kept short and free of switching-node coupling. The supplied evidence does not include the numerical supply-current or bypass specifications, so those values must be taken from the manufacturer data sheet rather than estimated.
The 40-pin PDIP package exposes analog, reference, charge-pump, and LED-drive functions, making pin-by-pin assignment verification essential. Follow the manufacturer pin table rather than relying on general DIP conventions. Keep high-impedance analog-input and reference routing away from LED-drive and charge-pump currents, and provide a low-impedance return for the display system. A complete public pin table was not included in the supplied search evidence, so no pin names or routing positions have been inferred here.
合規資訊
The verified JLCPCB listing identifies MAX140CPL+ as RoHS compliant. The Analog Devices product page identifies the MAX140 family as production. No verified REACH, AEC-Q100, lead-free, halogen-free, or conflict-minerals statement was supplied.