MAX139CPL+ - 3.5-Digit ADC with LED Drivers | Analog Devices
MPN: MAX139CPL+ ✓ فعالMAX139CPL+ نمای کلی
An ADC converts an analog input voltage into a numeric value for measurement, display, or control. The MAX139 belongs to the dual-slope ADC family within the broader ADC/DAC and integrated-circuit hierarchy. Dual-slope conversion is useful when stable, repeatable readings are more important than very high conversion speed, particularly in panel meters where input noise and reference accuracy directly affect the displayed result.
Key features include 3.5-digit resolution, an internal reference, an integrated charge pump, and direct LED drivers. The direct-driver outputs reduce the external circuitry needed to illuminate a multiplexed or segmented numeric display. Operating from +2.5V to +7V also allows the converter to fit systems that cannot provide the higher supply voltage associated with many older display-driver designs. The device accepts bipolar input signals, supporting measurement systems in which the sensed voltage may cross a defined midpoint.
The architecture combines a dual-slope conversion process with the MAX139 family’s integrated display support. Its internal reference and charge pump support the converter’s measurement and display functions, while the direct LED-driver outputs are intended to reduce system complexity. The Analog Devices product page identifies the MAX139 as a production device and lists a Data Sheet, Rev. 2, together with a product-selection table for family members.
Typical uses include digital panel meters, laboratory and bench instrumentation, industrial process readouts, laboratory equipment, weighing or counting displays, and compact embedded measurement panels. The combination of a 2.5V-to-7V supply range and direct LED drivers is especially useful where a numeric indication must be produced without a separate display-driver IC.
When designing a new board, verify the complete pinout, recommended input and reference network, LED current limits, bypass-capacitor requirements, and maximum input conditions against the manufacturer data sheet before layout is released. MAX139CPL+, MAX139CPL, and MAX139EPL-family variants use the same 40-pin PDIP format, but temperature grade, lead-free status, and electrical details must be checked rather than inferred from the suffix.
This page consolidates verified manufacturer and distributor information, package details, pricing, family alternatives, and application guidance. It adds selection context beyond a distributor listing while clearly identifying parameter values that still require confirmation from the manufacturer documentation.
جایگزین‌های drop-in برای MAX139CPL+ — همان پکیج، سازگار پین‌به‌پین. قطعات با پکیج متفاوت که نیاز به تغییر PCB دارند مستثنی هستند.
MAX139EPL+
✅ جایگزین مستقیم📋 جایگزین مرجع (خارج از کاتالوگ)
MAX139EPL
✅ جایگزین مستقیم📋 جایگزین مرجع (خارج از کاتالوگ)
MAX139CPL
✅ جایگزین مستقیم📋 جایگزین مرجع (خارج از کاتالوگ)
MAX139CPL+ حداکثر مقادیر مجاز و مشخصات الکتریکی
| ADC Resolution | 3.5 digits |
| Conversion Architecture | Dual-slope ADC |
| Number of ADC Channels | 1 channel |
| ولتاژ تغذیه کاری | +2.5V to +7V |
| Input Signal Type | Bipolar input |
| Internal Reference | Integrated |
| Charge Pump | Integrated |
| Display Output | Direct LED drivers |
| Package Type | PDIP-40 |
| تعداد پین‌ها | 40 pins |
| Package Dimensions | 0.600 in (15.24 mm) wide |
| سبک نصب | Through-hole |
| Temperature Grade | Commercial |
| Manufacturer Document Revision | Data Sheet Rev. 2 |
راهنمای پیکربندی پین MAX139CPL+ 0.600 in (15.24 mm) wide
پیکربندی پین برای MAX139CPL+ (پکیج 0.600 in (15.24 mm) wide). این قطعه قدرت دارای پایانه‌های گیت، درین و سورس است. برای پکیج‌های غیرقطبی، برای جهت دقیق پین ۱ و جزئیات فوت‌پرینت به دیتاشیت سازنده مراجعه کنید. کاربردهای رایج شامل طراحی منبع تغذیه، درایو موتور و سوئیچینگ بار است.
داده پین‌آوت تفصیلی موجود نیست برای MAX139CPL+.
به دیتاشیت برای پیکربندی کامل پین‌ها.
کاربردهای معمول
MAX139CPL+ مناسب است برای 6 کاربردs: Digital Panel Meters, Laboratory Bench Instrumentation, Industrial Process Readouts, Laboratory Equipment Counters, Precision Weighing Displays, Embedded Measurement Displays.
Digital Panel Meters
The MAX139CPL+ fits digital panel meters because it combines a 3.5-digit dual-slope ADC with direct LED drivers in one 40-pin PDIP device. Its one-channel measurement architecture and +2.5V-to-+7V operating range suit compact displays that must present a measured voltage, current, or resistance value without a separate display-driver IC. The internal reference and charge pump also reduce the number of supporting functions an instrument must provide. During design, verify the permitted input network, LED current limits, conversion timing, and display multiplexing arrangement against Data Sheet, Rev. 2. The commercial temperature-grade classification must also fall within the enclosure’s expected temperature range.
پیشنهادی
Laboratory Bench Instrumentation
The MAX139CPL+ is appropriate for laboratory bench instruments that use a stable numeric readout rather than rapid waveform acquisition. Its dual-slope, 3.5-digit architecture supports repeatable panel-style measurements, while the integrated reference, charge pump, and direct LED drivers can simplify the display path. The single +2.5V-to-+7V supply range permits use with common low-voltage analog systems and reduces the need for a more complex power arrangement. Designers should confirm input accuracy, conversion time, and LED-drive limits in the official data sheet because those values were not included in the verified search extract. A stable reference layout and suitable grounding remain essential for credible instrument readings.
پیشنهادی
Industrial Process Readouts
The MAX139CPL+ can support industrial process-readout equipment when the process signal can be conditioned into the converter’s permitted bipolar input range and the commercial-grade temperature classification meets the installation conditions. Its 3.5-digit dual-slope measurement system and direct LED drivers are useful for local temperature, pressure, position, or level indications. The +2.5V-to-+7V supply range is compatible with embedded 5V systems, while the 40-pin PDIP format supports through-hole assembly. Engineers must verify the complete electrical limits, input conditioning, settling requirements, and reference accuracy before design release. If the operating environment exceeds the commercial-grade range, the E-grade family options should be investigated instead.
پیشنهادی
Laboratory Equipment Counters
The MAX139CPL+ is suitable for counting and classification equipment that needs a readable three-and-a-half-digit result rather than a high-speed data-conversion stream. The dual-slope conversion method, one measurement channel, integrated reference, and direct LED drivers provide the core functions required for a simple counter or totalizer. Its single +2.5V-to-+7V supply supports integration into compact laboratory apparatus and reduces regulator complexity. The key engineering tradeoff is measurement speed: the converter is intended for displayed values rather than continuous high-rate sampling. Confirm conversion time, input filtering, display refresh requirements, and segment-drive current in the manufacturer documentation before selecting external resistors and indicator components.
پیشنهادی
Precision Weighing Displays
The MAX139CPL+ can form the measurement and display core of a compact weighing indicator because it provides a 3.5-digit result, integrated reference, charge pump, and direct LED drivers. The bipolar-input capability is useful when a load-cell or bridge signal is conditioned around a midpoint, while the +2.5V-to-+7V supply range suits low-voltage embedded systems. Direct LED-drive outputs can reduce the component count needed for a segmented numeric display. Accuracy still depends on the external analog front end, reference accuracy, layout, and system calibration rather than the converter alone. Verify the specified input ranges, sampling behavior, and settling time against the official data sheet before assigning production tolerances.
پیشنهادی
Embedded Measurement Displays
The MAX139CPL+ is well matched to embedded instruments that require a local numeric measurement and LED indication from a low-voltage supply. Its one-channel dual-slope ADC, 3.5-digit resolution, internal reference, charge pump, and direct LED drivers consolidate several functions into a single 40-pin PDIP. This is useful in compact test fixtures, environmental monitors, and service equipment where a numerical indication is more useful than a high-bandwidth data stream. The designer should preserve clean input grounding, follow the manufacturer bypass-capacitor recommendations, and verify that the display current and refresh timing suit the chosen LEDs. Commercial-grade limits must be checked against the enclosure temperature, while regulated industrial environments may justify evaluating the E-grade alternatives.
پیشنهادی
خلاصه محصولات پیشنهادی
داده‌های مرجع مهندسی برای MAX139CPL+ — مقایسه، راهنمای طراحی و اطلاعات انطباق.
راهنمای انتخاب
مقایسه با جایگزین‌ها
| پارامتر | این محصول | MAX139EPL+ | MAX139EPL | MAX139CPL |
|---|---|---|---|---|
| Brand | Analog Devices | Analog Devices | Analog Devices | Analog Devices |
| Package | PDIP-40 | PDIP-40 | PDIP-40 | PDIP-40 |
| ADC Resolution | 3.5 digits | 3.5 digits | 3.5 digits | 3.5 digits |
| Conversion Architecture | Dual-slope | Dual-slope | Dual-slope | Dual-slope |
| Number of ADC Channels | 1 channel | 1 channel | 1 channel | 1 channel |
| Operating Supply Voltage | +2.5V to +7V | +2.5V to +7V | +2.5V to +7V | +2.5V to +7V |
| Display Drive | Direct LED drivers | Direct LED drivers | Direct LED drivers | Direct LED drivers |
| Lead-Finish Suffix | + suffix present | + suffix present | + suffix absent | + suffix absent |
تفاوت‌های کلیدی
- Integrated measurement and display functions (در مقابلMAX139EPL+)
- Pin-compatible 40-pin PDIP footprint (در مقابلMAX139CPL)
- Commercial-grade ordering option (در مقابلMAX139EPL+)
یادداشت‌های طراحی
Follow the manufacturer’s recommended input, reference, supply, and bypass-capacitor placement exactly. Because this is a precision dual-slope measurement device, long input traces and poorly decoupled supply paths can introduce errors that are not apparent from the 3.5-digit resolution alone. Keep the measurement input away from LED-drive and charge-pump switching nodes, use a compact ground return for the analog section, and verify that the selected package’s 40-pin PDIP footprint matches the schematic before fabrication.
Do not treat MAX139CPL, MAX139EPL, MAX139EPL+, and MAX139CPL+ as identical without checking the ordering information. The verified comparison data shows the same 40-pin PDIP architecture and major conversion characteristics, but the E/C grade and plus-suffix distinctions affect temperature classification or lead condition. Review absolute-maximum ratings, operating temperature, lead-free status, and any changed electrical limit for the exact replacement before approving it for production.
The MAX139CPL+ operates from +2.5V to +7V, but that range does not remove the need for local supply decoupling. Place the manufacturer-recommended bypass capacitors close to their designated pins and keep supply routing away from sensitive analog inputs. Confirm the actual rail voltage, startup sequence, and display-drive current requirement for the selected board. If the display consumes significant current, verify that supply droop does not disturb the measurement and reference networks.
Separate the measurement path from the direct LED-drive outputs and the internal charge-pump activity as far as the through-hole layout permits. Use a compact analog ground region around the converter and route display-current returns away from reference and input connections. These measures help prevent display transitions and charge-pump coupling from becoming visible in the final reading. The exact reference, input, and bypass topology must be taken from Analog Devices Data Sheet, Rev. 2.
اطلاعات انطباق
The verified data identifies a + suffix ordering code but does not explicitly state the lead-free, RoHS, REACH, halogen-free, or conflict-minerals status. These fields remain unknown rather than being inferred. AEC-Q100 is not applicable because this is not identified as an automotive-qualified device.
