ICL7117CMH 3½-Digit ADC | Maxim Integrated | 44-Terminal QFP
料号： ICL7117CMH ✗ 停产ICL7117CMH 概述
An ADC is an analog-to-digital converter, a semiconductor that converts an analog input voltage into a digital representation. The ICL7117CMH belongs to the broader data-conversion and signal-processing hierarchy, where precision measurement systems commonly combine an analog input, a conversion engine, digital control or processing, and a display or communications interface. The display-hold function is intended to preserve a measured value so it can be viewed or transferred before the next conversion sequence changes the displayed result.
The package information is the most concrete differentiator for PCB design. A 44-terminal gull-wing QFP provides external connections for power, analog input, digital output, reference, control, and display-related functions, subject to the exact pin assignment in the manufacturer datasheet. Its 0.8 mm terminal pitch allows a compact square surface-mount footprint, while the 10.0075 mm package dimensions require PCB land patterns and courtyard planning based on the manufacturer drawing. The QFP format also provides mechanical lead support and is generally more convenient for automated board assembly than a fine-pitch leadless package.
ICL7117CMH is appropriate for panel meters, laboratory instruments, industrial monitoring equipment, digital weighing systems, process measurement, and other applications requiring a dedicated display-oriented ADC. In these systems, the converter accepts a conditioned analog signal, performs conversion, and presents a stable numerical result. The external circuitry normally defines the input range, reference voltage, integration timing, and display interface behavior.
Designers should follow the Maxim ICL7117CMH datasheet for pinout, electrical limits, recommended input and reference networks, timing, and decoupling. Because the verified information does not state the complete electrical ratings, verify the converter resolution, input voltage range, reference arrangement, operating temperature range, supply requirements, and timing values against the manufacturer document before releasing a PCB or production design.
This product page combines the verified package and product identity information with practical integration guidance, application mapping, and comparison context. It is intended to help engineers locate the correct ICL7117CMH documentation, understand the package implications, and plan a PCB or replacement review without treating general ADC characteristics as guaranteed ICL7117CMH specifications.
直接替换替代料： ICL7117CMH ——相同封装，引脚兼容。需要 PCB 改动的不同封装料号已排除。
该产品暂无直接替换替代料。
请求替代料ICL7117CMH 最大额定值与电气特性
| Product Type | 3½-digit ADC with display hold |
| Manufacturer | Maxim Integrated |
| 分类 | Data Acquisition - ADCs/DACs - Special Purpose |
| Terminal Count | 44 terminals |
| Package Code | QFP |
| Terminal Form | Gull wing |
| Package Shape | Square |
| Terminal Pitch | 0.8 mm |
| Package Width | 10.0075 mm |
| Package Length | 10.0075 mm |
| Conversion Display | 3½ digits |
| Display Hold Function | Present |
| 安装类型 | Surface mount |
ICL7117CMH 10.0075 mm 引脚配置指南
ICL7117CMH（10.0075 mm 封装）的引脚配置。 该模拟元件具有输入、输出和电源引脚。请参阅制造商数据手册以了解失调调零、补偿和使能引脚配置。适用于信号调理和放大器电路。
暂无详细引脚数据： ICL7117CMH.
请参阅 数据手册 以查看完整引脚配置。
典型应用
ICL7117CMH 适用于 6 应用s: Digital Panel Meters, Laboratory Measurement Instruments, Industrial Process Monitoring, Temperature Measurement Displays, Digital Weighing Systems, Data Acquisition and Test Equipment.
Digital Panel Meters
The ICL7117CMH fits compact digital panel meters because its three-and-a-half-digit conversion format is designed around a readable numerical display, and the display-hold function can preserve a selected reading for an operator. The 44-terminal QFP provides dedicated external connections for the analog section, reference, digital section, timing, and display-related signals. Designers should follow the Maxim Integrated datasheet for the exact pin assignment and recommended support network.
推荐
Laboratory Measurement Instruments
ICL7117CMH is suitable for laboratory instruments that present a stable three-and-a-half-digit measurement while a technician adjusts a sensor or test condition. Display hold helps retain the value used as a reference, while the QFP package keeps the converter compact in bench instruments. Signal conditioning, input protection, reference design, calibration, and display decoding should be completed according to the manufacturer application information.
推荐
Industrial Process Monitoring
The ICL7117CMH can support industrial process monitoring when the target quantity is reduced to a readable decimal value for local display. Its display hold supports temporary retention during inspection, while the 44-terminal package exposes the converter's separate functional sections. The transmitter front end still needs sensor excitation, filtering, surge protection, isolation, and calibration appropriate to the measured process variable.
推荐
Temperature Measurement Displays
ICL7117CMH is applicable to temperature measurement displays that use a linearized or compensated sensor signal and present a three-and-a-half-digit result. The converter's display-oriented architecture simplifies a standalone instrument, while hold allows the operator to retain a value while comparing it with a reference. Sensor type, excitation, linearization, reference stability, and calibration determine whether the converter's timing and accuracy suit the final system.
推荐
Digital Weighing Systems
The ICL7117CMH fits digital weighing systems that prioritize a stable numeric display over high-speed waveform acquisition. A load-cell signal is conditioned into the converter's input range, and the display-hold function lets an operator retain a value during inspection. Mechanical stability, excitation symmetry, input filtering, calibration coefficients, overload protection, and regulatory requirements remain outside the ADC's basic conversion function.
推荐
Data Acquisition and Test Equipment
ICL7117CMH is useful in data-acquisition and test equipment that combines an analog measurement with a local numeric readout. The three-and-a-half-digit result is appropriate for meter-style systems, and display hold assists comparison or setup. Its 0.8 mm-pitch 44-terminal QFP requires careful land-pattern implementation, while reference and timing networks should follow the manufacturer's recommended application circuit for stable readings.
推荐
推荐产品汇总
工程参考数据： ICL7117CMH ——对比、设计指导和合规信息。
选型指南
关键差异点
- Display-oriented conversion with hold capability （对比 General-purpose high-resolution ADCs)
- Established 44-terminal QFP interface （对比 Compact serial-interface ADC redesigns)
- Purpose-built panel-meter architecture （对比 MCP3424-E/SL)
设计说明
Design the PCB land pattern from the Maxim Integrated package drawing rather than from the distributor terminal count alone. The verified package is a square, 44-terminal gull-wing QFP with 0.8 mm pitch and 10.0075 mm width and length. Confirm pin numbering, lead-tip tolerances, courtyard limits, paste volume, and the footprint's orientation before fabrication; a dimensionally similar but non-approved footprint can create solder or bridging defects.
Do not treat the ICL7117CMH+, ICL7117CMH, and other partially specified listings as automatically interchangeable. The plus suffix may represent a distinct ordering or qualification option, so the BOM must identify the complete manufacturer part number. Before substitution, compare the ordering table, temperature grade, package code, lifecycle status, and electrical limits against the original production specification.
Route the analog input and reference-related nets away from digital timing and display outputs, and place the manufacturer's recommended input, reference, bypass, and timing components close to their associated pins. Because the verified information does not state the complete pin map or recommended network values, use the Maxim Integrated datasheet for exact connections. This separation reduces switching coupling and helps preserve the stability of the displayed measurement.
合规信息
Compliance attributes are not stated in the verified product information. AEC-Q100 is not applicable because this product is an analog-to-digital converter rather than an automotive-qualified power semiconductor; verify any automotive qualification separately from the manufacturer ordering information.
