AD571JD - 10-Bit SAR ADC with Reference | Analog Devices
N.º da peça: AD571JD ✗ Fim de vidaAD571JD Visão geral
An ADC converts a time-varying analog voltage into a digital number representing its amplitude. The AD571 belongs to the SAR ADC hierarchy, where an internal DAC produces successive approximation voltages that are compared with the input. Its complete-converter architecture places the reference, clock, and output circuitry together, reducing the number of external components required for basic acquisition systems.
The AD571JD provides 10-bit resolution, one analog input channel, and a maximum conversion time of 40 microseconds. Three-state outputs permit multiple converters to share a common data bus when only one device is selected at a time. The monolithic construction supports a compact implementation, while the 18-pin ceramic DIP package facilitates replacement and prototyping in through-hole systems.
The AD571 combines a 10-bit DAC, voltage reference, oscillator or clock section, comparator, successive-approximation register, and buffered outputs. According to the manufacturer documentation, the converter is designed for no missing codes over temperature up to +125 degrees Celsius. The parallel interface exposes the conversion result directly rather than using a serial protocol, making the device suitable for processor-controlled instrumentation where interface simplicity is important.
Typical uses include industrial process measurement, laboratory data acquisition, digital panel meters, and embedded control systems that sample slowly varying analog signals. Its integrated reference and clock also suit educational or prototype systems where a complete standalone converter is more useful than a bare ADC core. The parallel output can connect to suitable data buses when the host processor provides the required control signals and output enable timing.
Designers should verify the analog input range, reference accuracy, acquisition timing, and output logic levels against the complete manufacturer datasheet before layout. Because this is a ceramic DIP rather than a surface-mount device, board footprint and mechanical clearance must match the specified 18-pin package exactly. Replacement should also account for temperature grade and screening options rather than relying only on the 10-bit resolution and 40-microsecond conversion-speed labels.
This page consolidates verified manufacturer and distributor information, package-level replacement guidance, and practical selection considerations that help distinguish a true drop-in ceramic-DIP replacement from merely similar ADC products.
Alternativas drop-in para AD571JD — mesmo encapsulamento, compatível pino a pino. Peças de encapsulamento diferente que exigem retrabalho na PCB são excluídas.
Variantes desta série
Modelos da mesma série compatíveis como drop-in com AD571JD (mesmo formato e footprint) — diferindo em Digital Interface, Resolution.
AD571KD
✅ Drop-In📋 Alternativa de referência (fora do catálogo)
AD571SD/883B
✅ Drop-In ⚠️ Especificações não verificadasConsulte o preço
Ver ficha técnica →AD571LD
✅ Drop-In ⚠️ Especificações não verificadas📋 Alternativa de referência (fora do catálogo)
AD571SD/883B
✅ Drop-In ⚠️ Especificações não verificadasConsulte o preço
Ver ficha técnica →AD571JD Classificações máximas e características elétricas
| Resolução | 10 bit |
| Conversion Architecture | Successive approximation (SAR) |
| Analog Input Channels | 1 channel |
| Input Type | Single-ended |
| Digital Interface | 10-bit parallel, three-state outputs |
| Maximum Conversion Time | 40 us maximum |
| Integrated Reference | Internal voltage reference |
| Integrated Clock | Internal clock |
| Internal DAC | 10-bit DAC |
| Comparator | Integrated comparator |
| Successive Approximation Register | Integrated SAR |
| Output Buffers | Integrated three-state output buffers |
| Encapsulamento | 18-pin ceramic DIP (18-SBDIP) |
| Tipo de montagem | Through-hole |
| No Missing Codes Over Temperature | Up to +125 C |
| Maximum Power Dissipation | 800 mW |
| Monolithic Construction | Yes |
| Status RoHS | unknown |
| REACH Status | unknown |
| AEC-Q100 Qualification | not_applicable |
Guia de Configuração de Pinos do AD571JD 18-pin ceramic dip (18-sbdip)
Configuração de pinos para AD571JD (pacote 18-pin ceramic dip (18-sbdip)). Este componente analógico possui pinos de entrada, saída e alimentação. Consulte o datasheet do fabricante para configurações de offset null, compensação e pino de enable. Ideal para circuitos de condicionamento de sinal e amplificadores.
Nenhum dado detalhado de pinagem disponível para AD571JD.
Consulte a ficha técnica para a configuração completa dos pinos.
Aplicações típicas
AD571JD é adequado para 6 aplicaçãos: Industrial Process Measurement, Laboratory Data Acquisition, Digital Panel Meter, Embedded Control and Instrumentation, Legacy Control-System Retrofit, Educational Electronics and Prototyping.
Industrial Process Measurement
The AD571JD fits industrial process-measurement systems that monitor pressure, temperature, position, or level through a slowly changing analog voltage. Its single-ended input is converted by a 10-bit successive-approximation architecture in 40 microseconds maximum, providing enough resolution for supervisory and control functions without a complex converter subsystem. The integrated voltage reference and clock reduce external support circuitry, while the 18-pin ceramic DIP is convenient for legacy through-hole control boards. Designers must still add suitable input conditioning and protection, verify the documented analog input range, and confirm that the AD571JD temperature grade matches the enclosure environment.
Recomendado
Laboratory Data Acquisition
AD571JD is suitable for laboratory and educational instrumentation that acquires relatively slow sensor signals through a parallel digital interface. The complete 10-bit SAR converter includes its DAC, voltage reference, clock, comparator, and output buffers, allowing a prototype to operate without an external reference or separate clock source. A 40-microsecond maximum conversion time supports acquisition rates well above many temperature, potentiometer, and laboratory sensor outputs. The three-state parallel outputs can be routed to a processor bus, although the host must meet the required logic levels and control the output-enable signal to prevent bus contention.
Recomendado
Digital Panel Meter
The AD571JD can serve as the acquisition element in a digital panel meter for equipment monitoring. Its 10-bit result provides 1,024 digital codes, and the 40-microsecond maximum conversion time permits the meter to update the displayed measurement without a high-speed flash converter. The internal reference and clock are especially useful when the design must remain compact and avoid external timing components. Because the three-state outputs are parallel, the meter controller can capture the value over a dedicated bus or a multiplexed processor interface. Analog front-end design remains essential for scaling, filtering, grounding, and protecting the single-ended input against industrial transients.
Recomendado
Embedded Control and Instrumentation
AD571JD is appropriate for legacy embedded-control systems in which a microprocessor must periodically acquire an analog command or sensor signal. The successive-approximation converter completes a conversion in 40 microseconds maximum, leaving substantial time for control processing and actuator updates even when several measurements are required in a loop. Three-state outputs allow careful bus sharing, while the integrated reference and clock simplify the power and timing arrangement around the converter. Integration is not universal, however: the host processor must support the electrical output levels, issue the proper conversion-control sequence, and avoid driving the data lines while the ADC outputs are enabled.
Recomendado
Legacy Control-System Retrofit
The AD571JD is particularly relevant when repairing or extending an older control system that already uses an 18-pin ceramic-DIP ADC footprint. Its 10-bit SAR conversion, parallel output architecture, integrated clock, and integrated reference preserve the functional concept of the original AD571-family design. Using a mechanically and pin-compatible same-family option can reduce board changes, although engineers must compare the replacement suffix's temperature rating and screening requirements before energizing the system. The ceramic package should be inspected for mechanical stress, socket corrosion, and contamination, and the original manufacturer's pin configuration should remain the authority for every connection.
Recomendado
Educational Electronics and Prototyping
AD571JD provides a straightforward platform for teaching analog-to-digital conversion because it combines the complete 10-bit SAR converter, reference, clock, and output buffers in one package. Students can observe successive conversion results over the parallel digital outputs, connect the single-ended input to a potentiometer or sensor, and compare readings as the analog voltage changes. The through-hole ceramic DIP is easy to mount on a prototype board, although it requires more board space than a modern surface-mount ADC. Before use, instructors should verify supply voltage, input range, logic levels, timing, and output coding from the complete manufacturer datasheet to prevent incorrect wiring.
Recomendado
Resumo dos produtos recomendados
Dados de referência de engenharia para AD571JD — comparação, orientação de projeto e informações de conformidade.
Guia de seleção
Comparação com alternativas
| Parâmetro | Este produto | AD571KD | AD571SD | AD571LD | AD571SD/883B |
|---|---|---|---|---|---|
| Package | 18-pin ceramic DIP (18-SBDIP) | 18-pin ceramic DIP (18-SBDIP) | 18-pin ceramic DIP (18-SBDIP) | 18-pin ceramic DIP (18-SBDIP) | 18-pin ceramic DIP (18-SBDIP) |
| Brand | Analog Devices | Analog Devices | Analog Devices | Analog Devices | Analog Devices |
| Resolution | 10 bit | 10 bit | 10 bit | 10 bit | 10 bit |
| Conversion Architecture | Successive approximation (SAR) | Successive approximation (SAR) | Successive approximation (SAR) | Successive approximation (SAR) | Successive approximation (SAR) |
| Analog Input Channels | 1 channel | 1 channel | 1 channel | 1 channel | 1 channel |
| Maximum Conversion Time | 40 us maximum | 40 us maximum | 40 us maximum | 40 us maximum | 40 us maximum |
| Digital Interface | 10-bit parallel with three-state outputs | 10-bit parallel with three-state outputs | 10-bit parallel with three-state outputs | 10-bit parallel with three-state outputs | 10-bit parallel with three-state outputs |
Principais diferenciais
- Complete standalone converter architecture (vs AD571KD)
- Same mechanical footprint for retrofit use (vs AD571SD/883B)
- Parallel acquisition with bus sharing (vs AD571LD)
Notas de projeto
Do not substitute an ADC solely because it is also a 10-bit converter. The AD571 uses a parallel, three-state digital interface and an 18-pin ceramic-DIP footprint. Before replacing AD571JD, compare the complete manufacturer pin table, input range, supply voltage, reference behavior, logic levels, conversion timing, and temperature grade. A converter with the same resolution but a serial interface or different pin assignments is not a drop-in replacement and can damage the original controller bus.
The listed maximum power dissipation is 800 mW, so the design should verify worst-case supply dissipation rather than relying on the input signal level alone. Ceramic-DIP construction improves heat conduction compared with an unsupported plastic package, but airflow and socket or PCB thermal resistance still influence junction temperature. Use the manufacturer thermal and maximum-rating information for the selected suffix, and avoid treating 800 mW as a design target.
The three-state outputs require disciplined bus-enable sequencing. Assert the converter's output enable only after its outputs are valid, and ensure no host data driver contends with the ADC on the same bus. Keep the analog input path short, use a stable reference ground, and isolate digital switching from the input trace. The parallel interface can create timing skew across the data lines if the controller does not sample the result on a properly qualified clock or control edge.
Informações de conformidade
The supplied verified excerpts do not state RoHS, REACH, lead-free, halogen-free, or conflict-minerals status. The AD571 is an industrial/legacy analog converter rather than an automotive-qualified device, so AEC-Q100 is recorded as not applicable.
