ICL7109EPL+ - 12-Bit Dual-Slope ADC | Analog Devices
Артикул: ICL7109EPL+ ✓ АктивенICL7109EPL+ Обзор
An ADC is an analog-to-digital converter, a semiconductor that transforms a continuous analog voltage into a numeric value suitable for processing, measurement, display, or storage. Dual-slope ADCs belong to the integrating ADC family. They integrate an input signal over a fixed interval and compare the result with a reference, producing a proportional digital result. The ICL7109 therefore sits within the broader analog signal-processing and data-conversion hierarchy rather than acting as a general-purpose digital interface or microcontroller.
The principal device characteristics are 12-bit resolution, one analog input, dual-slope conversion, and a 30-sample-per-second conversion rate. Its parallel interface can operate in direct mode or handshake mode, while tri-state outputs allow multiple converters to share a bus when appropriate addressing and control are provided. The low input bias current suits high-impedance sources and reduces the loading error that can affect precision measurements.
The converter integrates input, reference, and clock functions into a dedicated measurement channel. A zero-integrator phase introduced by the manufacturer helps eliminate overrange hangover, crosstalk, and hysteresis effects during successive measurements. This behavior is particularly useful in multiplexed or repetitive acquisition systems where the converter must settle consistently between readings. The ceramic DIP package supports through-hole PCB assembly and provides a mechanically robust option for established industrial and laboratory instrumentation.
Typical uses include digital panel meters, laboratory measurement instruments, process-control interfaces, temperature monitoring, sensor signal acquisition, and low-rate industrial data logging. For a microcontroller-based design, the tri-state outputs can be read through a parallel input interface or port expander. For instrumentation, the reference and input circuitry remain important because accuracy depends on reference quality, input conditioning, clock stability, and the selected integration period.
Designers should treat input and reference routing as precision analog signals even though the digital outputs use conventional logic levels. Keep the analog input path short, bypass the supply rails near the device, use a stable reference source, and avoid routing high-current digital outputs beneath sensitive analog nodes. The converter's maximum input voltage and supply limits must also be respected in fault conditions.
This product page combines the manufacturer's converter description with engineering-oriented application guidance, package details, replacement analysis, and design notes. It helps evaluators distinguish the ICL7109EPL+ from related converter variants while focusing on practical integration, measurement accuracy, thermal range, and PCB compatibility.
Аналоги без доработки для ICL7109EPL+ — тот же корпус, pin-to-pin совместимость. Компоненты в других корпусах, требующие переработки PCB, исключены.
Варианты в этой серии
Модели той же серии, совместимые без доработки с ICL7109EPL+ (тот же форм-фактор и посадочное место) — отличается по Package, Resolution, Conversion Architecture, Display Output, Input Impedance.
ICL7109CPL+
✅ Прямая замена📋 Справочный аналог (нет в каталоге)
ICL7109CPL
✅ Прямая заменаУточнить цену
Открыть даташит →ICL7116CPL+
✅ Прямая заменаУточнить цену
Открыть даташит →TC7109CPL
✅ Прямая замена📋 Справочный аналог (нет в каталоге)
ICL7106CPL+
✅ Прямая заменаУточнить цену
Открыть даташит →ICL7109EPL+ Максимальные параметры и электрические характеристики
| Разрешение | 12 bit |
| Number of Input Channels | 1 channel |
| Conversion Architecture | Dual-slope integrating ADC |
| Conversion Rate | 30 samples/s |
| Тип выхода | 3-state binary parallel output |
| Тип интерфейса | Parallel |
| Диапазон входного напряжения | -3.5 V to +3.5 V |
| Диапазон рабочих температур | -40°C to +85°C |
| Screening Level | Industrial |
| Package Type | Ceramic DIP-40 |
| Количество выводов | 40 pins |
| Lead Pitch | 0.600 inch (15.24 mm) |
| Тип монтажа | Through-hole |
| Low-Power Data-Acquisition Role | 1 channel per converter |
| Zero-Integrator Phase | Included for overrange and hysteresis reduction |
Руководство по цоколевке ICL7109EPL+ в корпусе ceramic dip-40
Цоколевка для ICL7109EPL+ (корпус ceramic dip-40). 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 ICL7109EPL+.
Обратитесь к даташиту для полной конфигурации выводов.
Типичное применение
ICL7109EPL+ подходит для 6 применениеs: Digital Panel Meters, Industrial Process Measurement, Laboratory Instrumentation, Temperature Monitoring, Sensor Signal Acquisition, Data Logging Systems.
Digital Panel Meters
The ICL7109EPL+ is well suited to digital panel meters because it combines 12-bit resolution with a 30-sample-per-second conversion rate and low input bias current. A resistive sensor divider can feed the single analog input, while the tri-state parallel outputs connect to a display controller or MCU. The -40°C to +85°C industrial range also supports metering equipment deployed in factories, utility cabinets, and outdoor instrumentation where commercial-temperature converters may be inadequate.
Рекомендуется
Industrial Process Measurement
For slow process variables such as temperature, pressure, or position, the ICL7109EPL+ provides a straightforward dual-slope measurement channel. Its 30-sample-per-second rate is sufficient for many industrial panels, while the 12-bit result provides 4096 digital codes for representing the converted input. The industrial temperature range and low input bias current make it appropriate for conditioning high-impedance dividers and sensor outputs without adding a multiplexed analog front end.
Рекомендуется
Laboratory Instrumentation
The ICL7109EPL+ can serve as the measurement engine in a laboratory meter when accuracy, repeatability, and readable digital output matter more than high conversion bandwidth. The low input bias current reduces loading of sensitive dividers and transducer networks, and the zero-integrator phase helps minimize overrange hangover, crosstalk, and hysteresis effects. A stable reference, clean supply bypassing, and careful analog layout remain essential for repeatable laboratory results.
Рекомендуется
Temperature Monitoring
A resistive temperature sensor can be connected to the ICL7109EPL+ in a bridge or divider arrangement when an update rate near 30 samples per second is adequate. The converter's low input bias current is useful with long sensor wiring because leakage and loading errors are reduced. Its extended industrial temperature range supports measurement electronics in heated enclosures, industrial ovens, energy equipment, and environmental test systems where both the sensor and converter may operate outside commercial limits.
Рекомендуется
Sensor Signal Acquisition
The ICL7109EPL+ can acquire one low-frequency sensor channel without the switching noise associated with a high-speed successive-approximation converter. Its dual-slope architecture and low input bias current are useful for high-impedance sources where source resistance contributes measurement error. The zero-integrator function also improves repeatability after overrange, helping reduce crosstalk and hysteresis when multiple measurement positions are scanned in a larger instrument.
Рекомендуется
Data Logging Systems
The ICL7109EPL+ is practical in compact data loggers that periodically sample one analog variable and store or transmit the resulting code. Its low-power measurement approach reduces the burden on battery-operated equipment compared with a continuously operating high-speed converter, while the 40-pin ceramic DIP supports established through-hole instrument construction. Designers should add input protection, reference monitoring, and calibration storage when measurements must remain trustworthy over long operating periods.
Рекомендуется
Сводка рекомендуемых товаров
Справочные инженерные данные для ICL7109EPL+ — сравнение, рекомендации по проектированию и информация о соответствии.
Руководство по выбору
Сравнение с аналогами
| Параметр | Этот товар | ICL7109CPL+ | ICL7109CPL | ICL7116CPL+ | TC7109CPL | ICL7106CPL |
|---|---|---|---|---|---|---|
| Package | Ceramic DIP-40 | Ceramic DIP-40 | Ceramic DIP-40 | Ceramic DIP-40 | Ceramic DIP-40 | Ceramic DIP-40 |
| Brand | Analog Devices | Analog Devices | Analog Devices | Analog Devices | Microchip Technology | Analog Devices |
| Conversion Architecture | Dual-slope integrating ADC | Dual-slope integrating ADC | Dual-slope integrating ADC | Integrating ADC | Dual-slope integrating ADC | Dual-slope integrating ADC |
| Output Interface | 3-state binary parallel output | 3-state binary parallel output | 3-state binary parallel output | Parallel output | Parallel output | 3-state binary parallel output |
Ключевые отличия
- Extended industrial temperature coverage (против ICL7109CPL+)
- Dedicated 12-bit dual-slope measurement channel (против ICL7106CPL)
- Low-power parallel measurement architecture (против PCM1808PW)
- Repeatable behavior after overrange (против TC7109CPL)
Заметки по проектированию
Route the analog input, reference, and clock-related connections as precision analog nets rather than as ordinary digital signals. Keep the ICL7109EPL+ input path short, avoid copper junctions beneath sensitive analog nodes, and provide a quiet ground reference. The ceramic DIP footprint allows through-hole components, but good component placement and return-current management remain necessary for repeatable 12-bit measurements.
Decouple the converter supply rails close to the device and maintain the voltage limits defined in the manufacturer datasheet. Separate analog and digital return paths where practical, and connect bypass capacitors to the appropriate ground plane with minimal loop area. Include input overvoltage protection if the measurement source can exceed -3.5 V to +3.5 V or disconnect during maintenance.
Do not assume that a family member with the same 40-pin DIP outline is automatically interchangeable. Compare power pins, analog inputs, references, clock connections, mode-control inputs, output timing, and temperature limits against the exact datasheets. In particular, the commercial-grade ICL7109CPL and ICL7109CPL+ do not provide the same -40°C to +85°C operating range as the ICL7109EPL+.
Allow adequate settling time between reference, input, and control transitions before interpreting a conversion result. The dual-slope measurement and zero-integrator behavior make repeated readings more consistent, but they do not remove errors caused by a switching reference, unstable clock source, high source impedance, or inadequate bypass capacitance. Validate these conditions at the lowest and highest expected input voltages.
Информация о соответствии
The available manufacturer and distributor information identifies industrial screening and production status but does not state the requested environmental or material-compliance declarations. The plus suffix identifies the lead-free ordering variant, but no separate compliance certificate was identified in the available product information.
