AD571KD/+ - 10-Bit SAR ADC in 18-Pin DIP | Analog Devices
Артикул: AD571KD/+ ✓ АктивенAD571KD/+ Обзор
An ADC is an interface component that converts an analog voltage into a digital number for processing, measurement, display, or control. The AD571 belongs to the successive-approximation, or SAR, ADC family. In this architecture, an internal DAC generates successive trial voltages, the comparator evaluates each trial against the input, and the successive-approximation register records the conversion result. The AD571 integrates the supporting conversion elements on one chip, reducing the number of external components required for a complete conversion channel.
The AD571's 10-bit conversion resolution provides 1,024 distinguishable digital codes across the converter's analog input range. This resolution is suitable for instrumentation and control systems that need moderate rather than high-resolution digital measurement. Its integrated reference, clock, comparator, DAC, register, and output buffers establish a self-contained conversion architecture, while the parallel output interface provides direct access to the converted code.
The AD571KD/+ is identified as a commercial-grade, through-hole device in an 18-pin SBCDIP package. The ceramic DIP construction and through-hole lead format suit legacy industrial, instrumentation, test, and control equipment where plated-through-hole assembly and direct socket or PCB mounting are preferred. The package also provides a straightforward mechanical format for repair and replacement of older embedded analog-measurement systems.
Typical applications include process-control instrumentation, digital panel meters, laboratory measurement equipment, sensor-interface circuits, industrial data-acquisition systems, and embedded control systems. In these systems, the AD571 can digitize a conditioned analog sensor signal while its integrated reference and conversion clock reduce the external support circuitry needed. System designers should still provide input conditioning, suitable bypassing, acquisition timing, and output-interface buffering.
For a new design, verify the required analog input range, conversion timing, output logic levels, reference behavior, and acquisition architecture against the manufacturer datasheet before allocating the PCB footprint. When upgrading an existing board, confirm that the 18-pin pinout and signal functions match, and account for the DIP package's larger footprint compared with modern surface-mount ADC packages.
This product page combines the AD571KD/+ device identity, package and converter architecture with replacement guidance, application-focused design guidance, and a parameter-by-parameter comparison. It is intended to help engineers identify the correct legacy-compatible ADC without confusing package variants, temperature grades, or functional alternatives with exact drop-in replacements.
Аналоги без доработки для AD571KD/+ — 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 AD571KD/+ (тот же форм-фактор и посадочное место) — отличается по Resolution, Architecture, Digital Interface, Package.
AD571SD/883B
✅ Прямая заменаУточнить цену
Открыть даташит →AD571JN
✅ Прямая замена ⚠️ Характеристики не проверены📋 Справочный аналог (нет в каталоге)
AD571KN
✅ Прямая замена ⚠️ Характеристики не проверены📋 Справочный аналог (нет в каталоге)
AD571JD
✅ Прямая замена ⚠️ Характеристики не провереныУточнить цену
Открыть даташит →AD571SD/883B
✅ Прямая замена ⚠️ Характеристики не провереныУточнить цену
Открыть даташит →AD571KD/+ Максимальные параметры и электрические характеристики
| Converter Type | Successive-approximation ADC |
| Разрешение | 10 bit |
| Number of Output Codes | 1,024 codes |
| Architecture | Integrated DAC, voltage reference, clock, comparator, successive-approximation register, and output buffers |
| Input Channel Count | 1 channel |
| Reference Type | Internal voltage reference |
| Temperature Grade | Commercial |
| Корпус | 18-pin SBCDIP |
| Package Code | DIP |
| Package Shape | Rectangular |
| Тип монтажа | Through-hole |
| Terminal Count | 18 terminals |
Руководство по цоколевке AD571KD/+ в корпусе rectangular
Цоколевка для AD571KD/+ (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 AD571KD/+.
Обратитесь к даташиту для полной конфигурации выводов.
Типичное применение
AD571KD/+ подходит для 6 применениеs: Process-Control Instrumentation, Digital Panel Meters, Laboratory Measurement Equipment, Industrial Data-Acquisition Systems, Sensor-Interface Circuits, Embedded Control and Measurement.
Process-Control Instrumentation
The AD571KD/+ fits legacy process-control panels that digitize a conditioned 0-to-10 V or sensor-derived voltage into a 10-bit code. Its 10-bit successive-approximation architecture provides 1,024 output levels, while the integrated DAC, reference, clock, comparator, register, and output buffers reduce the number of external conversion blocks required at the analog input. The 18-pin through-hole ceramic DIP is particularly useful when repairing equipment with existing DIP sockets or plated-through-hole boards. Designers should verify the exact input range and conversion timing in the AD571 manufacturer datasheet, then provide appropriate sensor buffering, anti-alias filtering, reference bypassing, and digital isolation where the measured process can introduce electrical hazards.
Рекомендуется
Digital Panel Meters
The AD571KD/+ is appropriate for digital panel meters that require a compact, self-contained 10-bit conversion path in a through-hole package. A divided sensor or amplifier output can drive the analog input, and the integrated voltage reference and clock help the converter operate as a coherent acquisition subsystem. Its 1,024-code resolution is suitable for display-oriented measurements where readability and repeatability matter more than laboratory-grade precision. The 18-pin ceramic DIP footprint supports hand assembly, socket use, and repair of legacy meters. Before finalizing the design, confirm the analog input limits, output coding, acquisition cycle, and logic compatibility from the manufacturer datasheet, and include filtering that prevents display updates from switching unpredictably.
Рекомендуется
Laboratory Measurement Equipment
The AD571KD/+ can serve in older laboratory instruments that require a straightforward 10-bit measurement channel and stable legacy construction. The successive-approximation converter determines the input voltage by comparing it with successive trials from an internal DAC, allowing the device to operate as a complete converter rather than requiring a separate reference, clock, comparator, and register. Its 10-bit resolution gives engineers 1,024 distinguishable codes, a useful level for basic waveform, position, level, or control measurements. The through-hole ceramic DIP package also simplifies repair in educational and industrial test equipment. Validate input settling requirements, conversion time, output timing, and grounding strategy in the AD571 manufacturer datasheet before replacing the converter.
Рекомендуется
Industrial Data-Acquisition Systems
The AD571KD/+ is useful in industrial data-acquisition systems built around legacy backplanes, socketed controller boards, or through-hole analog front ends. Its integrated conversion blocks simplify the analog channel, and the parallel output structure can feed a controller or latch through appropriate interface circuitry. The commercial-grade designation and ceramic DIP construction align with equipment intended for controlled industrial environments, although the exact temperature range must be checked against the installed enclosure. For reliable operation, separate sensitive inputs from switching and digital return currents, bypass the supply near the device, and use a shielded connection for the sensor source. The existing board footprint should be checked against the official 18-pin connection drawing before substitution.
Рекомендуется
Sensor-Interface Circuits
The AD571KD/+ can digitize the output of a sensor amplifier in a design where 10-bit measurement resolution is adequate. The integrated voltage reference, clock, DAC, comparator, successive-approximation register, and output buffers create a self-contained converter block, leaving the analog front end responsible for excitation, amplification, filtering, and level shifting. This division of responsibility suits pressure, temperature, position, and level instrumentation in legacy equipment. The ADC's 1,024-code output should be evaluated against the required measurement resolution and noise performance of the complete sensor chain. Designers should also check input settling, acquisition timing, grounding, and bypass requirements in the AD571 manufacturer datasheet rather than assuming that integration eliminates all analog-layout constraints.
Рекомендуется
Embedded Control and Measurement
The AD571KD/+ is appropriate for embedded control systems that need a simple 10-bit measurement interface while retaining a proven through-hole converter package. A controller can read the ADC's digital result and use it in feedback calculations, threshold decisions, alarms, or actuator commands. The integrated clock and voltage reference reduce the support circuitry required for basic acquisition, and the monolithic converter architecture helps preserve predictable behavior in equipment designed around the original AD571 family. The commercial temperature designation is suitable for many indoor controls, but the full operating-temperature specification must be confirmed for the deployment environment. Review the output interface, settling time, supply limits, and pin functions in the manufacturer datasheet before updating an existing controller board.
Рекомендуется
Сводка рекомендуемых товаров
Справочные инженерные данные для AD571KD/+ — сравнение, рекомендации по проектированию и информация о соответствии.
Руководство по выбору
Сравнение с аналогами
| Параметр | Этот товар | AD571SD/883B | AD571JN | AD571KN |
|---|---|---|---|---|
| Package | 18-pin SBCDIP | 18-pin SBCDIP | 18-pin SBCDIP | 18-pin SBCDIP |
| Brand | Analog Devices | Analog Devices | Analog Devices | Analog Devices |
| Converter Type | Successive-approximation ADC | Successive-approximation ADC | Successive-approximation ADC | Successive-approximation ADC |
| Resolution | 10 bit | 10 bit | 10 bit | 10 bit |
| Output Code Count | 1,024 codes | 1,024 codes | 1,024 codes | 1,024 codes |
| Mounting Type | Through-hole | Through-hole | Through-hole | Through-hole |
| Terminal Count | 18 terminals | 18 terminals | 18 terminals | 18 terminals |
Ключевые отличия
- Directly documented same-package replacement (против AD571SD/883B)
- Complete monolithic conversion chain (против AD571SD/883B)
- Commercial configuration for legacy through-hole systems (против AD571SD/883B)
Заметки по проектированию
Confirm the official 18-pin connection drawing before assigning signals or laying out a replacement board. Keep the converter's supply bypass and grounding paths short, place decoupling capacitors close to their associated pins, and separate analog input routing from digital output and control traces. For legacy through-hole layouts, inspect socket contacts and plated-through-hole barrels because poor oxidation or annular-ring damage can create intermittent acquisition faults that resemble converter failure.
Design the analog front end so the sensor or amplifier output settles to the converter's required accuracy before sampling. Use passive filtering for out-of-band noise and keep the source impedance compatible with the input and acquisition timing in the AD571 manufacturer datasheet. A practical estimate must include the source impedance, filter resistance, filter capacitance, and required settling time; do not select these values solely from nominal conversion-rate information.
Do not substitute an 18-pin ADC solely because the package and resolution match. Verify the analog input range, reference behavior, output coding, interface timing, supply limits, temperature grade, and qualification or screening suffix. AD571SD/883B is documented as a complete replacement, while other family order codes can differ in procurement class. Record the selected MPN in the schematic and bill of materials to prevent an unintended grade change during maintenance.
Use a solid ground return for the converter and connect analog and digital returns according to the manufacturer's application guidance. Place input-conditioning components near the signal source or converter as appropriate, and keep high-current or switching paths away from the analog input. When installing a through-hole ceramic DIP, provide mechanical clearance for the package body and consider socket selection, pin alignment, and adequate insertion clearance in compact legacy equipment.
Информация о соответствии
The AD571KD/+ is an Analog Devices converter in an 18-pin SBCDIP package. RoHS, REACH, lead-free, halogen-free, and conflict-minerals status require confirmation from the manufacturer's current product documentation.
