AD779JN - 14-Bit 128 kSPS ADC | Analog Devices | Signal Processing
N.º da peça: AD779JN ✓ AtivoAD779JN Visão geral
An ADC is an analog-to-digital converter, a semiconductor that samples a continuous analog voltage and converts it into a numeric value for processing, measurement, or control. In the product hierarchy, the AD779JN is a data-conversion IC and specifically a monolithic, successive-approximation-style sampling ADC. Its 14-bit conversion resolution provides 16,384 digital codes, making it suitable for instrumentation, industrial measurement, and signal-acquisition systems.
The verified key specifications are 14-bit resolution, a maximum sampling rate of 128 kSPS, one input channel, and a 28-pin PDIP package. The integrated sample-and-hold amplifier supports acquisition of analog signals without requiring a separate external sample-and-hold stage. The microprocessor-compatible interface enables a host processor or controller to retrieve each conversion result. An internal voltage reference and clock-generation block also reduce the number of external supporting components required in a measurement circuit.
The AD779 family is characterized for both dynamic and static signal-conversion performance. Dynamic specifications include signal-to-noise-plus-distortion ratio, total harmonic distortion, and intermodulation distortion, while static specifications address conversion accuracy and other DC behavior. According to the Analog Devices product information, the converter uses Analog Devices BiMOS monolithic technology, intended to provide the reliability advantage of a monolithic implementation over multichip or hybrid designs.
Typical uses include industrial process monitoring, sensor-signal conditioning, laboratory data acquisition, audio and general signal processing, and microprocessor-controlled measurement systems. The 128 kSPS conversion rate is suitable for sampling bandwidths well below 64 kHz under ideal Nyquist conditions. Practical system bandwidth must also account for the input network, reference accuracy, digital-interface timing, and the acquisition characteristics specified in the manufacturer datasheet.
Designers should follow the manufacturer’s recommended input, reference, decoupling, and digital-interface circuits rather than treating the ADC as an isolated block. Grounding, return-current control, and keeping analog and digital signal paths physically separated are important for preserving achievable conversion performance. The complete pinout, supply limits, input ranges, reference characteristics, and timing values should be confirmed in the Analog Devices datasheet before layout release.
This page consolidates the verified AD779JN device identity, package, resolution, throughput, official documentation, distributor listings, family-grade alternatives, and practical engineering guidance. It also separates verified facts from parameters that still require datasheet confirmation, making it easier to compare the AD779JN without relying on incomplete distributor summaries.
Alternativas drop-in para AD779JN — 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 AD779JN (mesmo formato e footprint) — diferindo em Number of Input Channels, Package.
AD779KN
✅ Drop-In ⚠️ Especificações não verificadas📋 Alternativa de referência (fora do catálogo)
AD779KR
✅ Drop-In ⚠️ Especificações não verificadas📋 Alternativa de referência (fora do catálogo)
AD779KD
✅ Drop-InConsulte o preço
Ver ficha técnica →AD779BN
✅ Drop-In ⚠️ Especificações não verificadas📋 Alternativa de referência (fora do catálogo)
AD779TR
✅ Drop-In ⚠️ Especificações não verificadas📋 Alternativa de referência (fora do catálogo)
AD779JN Classificações máximas e características elétricas
| ADC Type | Complete monolithic sampling ADC |
| Resolução | 14 bit |
| Taxa de amostragem | 128 kSPS |
| Number of Input Channels | 1 channel |
| Input Architecture | Single-ended input |
| Sample-and-Hold Amplifier | Integrated |
| Digital Interface | 14-bit microprocessor-compatible parallel bus |
| Voltage Reference | Integrated internal voltage reference |
| Clock Generation | Integrated clock-generation circuitry |
| Process Technology | Analog Devices BiMOS monolithic technology |
| Encapsulamento | 28-pin PDIP |
| Tipo de montagem | Through-hole |
Guia de Configuração de Pinos do AD779JN 28-pin pdip
Configuração de pinos para AD779JN (pacote 28-pin pdip). 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 AD779JN.
Consulte a ficha técnica para a configuração completa dos pinos.
Aplicações típicas
AD779JN é adequado para 6 aplicaçãos: Industrial Process Monitoring, Precision Sensor Signal Acquisition, Laboratory Data Acquisition, Audio and General Signal Processing, Microcontroller-Controlled Measurement, Retrofit and Long-Lifecycle Instrumentation.
Industrial Process Monitoring
The AD779JN fits industrial process-monitoring designs that require more resolution than a basic 12-bit controller ADC while retaining a manageable 128 kSPS sampling rate. Its 14-bit conversion word and integrated sample-and-hold amplifier allow a conditioned transducer signal to be captured directly for digital filtering or control. The single input channel and 28-pin PDIP package also simplify retrofit designs built around a microprocessor-compatible parallel bus. The ADC should be placed near the sensor interface, with its analog and digital return paths planned to prevent switching noise from corrupting the conversion. Before deployment, verify the input range, supply voltage, operating temperature, reference accuracy, and acquisition timing in the manufacturer datasheet.
Recomendado
Precision Sensor Signal Acquisition
The AD779JN is appropriate for sensor front ends that produce low-level analog voltages and require deterministic digital results. Its integrated sample-and-hold amplifier supports acquisition at up to 128 kSPS, while the 14-bit resolution provides 16,384 output codes for representing the measured signal. A parallel interface can transfer each result efficiently into a microprocessor, FPGA, or data-acquisition controller. Because the converter also integrates a voltage reference and clock-generation circuitry, the system can be designed around a compact analog front end. The final circuit still needs verified input-range, reference-voltage, and supply-limit values, plus careful grounding and bypass-capacitor placement according to the official application guidance.
Recomendado
Laboratory Data Acquisition
The AD779JN can serve as the conversion element in a laboratory data-acquisition system requiring 14-bit resolution and moderate-to-high sampling throughput. Its 128 kSPS rate is adequate for many slow and medium-bandwidth signals, while the microprocessor-compatible parallel bus supports direct acquisition-controller access. Integrating the sample-and-hold amplifier, voltage reference, and clock-generation circuitry can simplify the analog subsystem and reduce external assembly. For instrumentation, the analog input should be protected and referenced in a manner consistent with the datasheet, and the PCB should separate sensitive input routing from digital bus activity. Calibration strategy, input bandwidth, reference stability, and acquisition timing must be confirmed from the manufacturer documentation before measurement accuracy is specified.
Recomendado
Audio and General Signal Processing
The AD779JN can be used in audio or general signal-processing paths that require more than 12-bit dynamic range but do not require a very high conversion rate. Its 14-bit resolution and 128 kSPS maximum sampling rate support digital capture of analog waveforms, while the characterized signal-to-noise-plus-distortion, total-harmonic-distortion, and intermodulation-distortion parameters allow signal-chain designers to evaluate performance. The Analog Devices family information specifically identifies these dynamic specifications as important for signal-processing applications. Engineers should confirm the permitted input bandwidth and acquisition behavior, establish suitable analog scaling, and use the recommended grounding and reference arrangement. The official datasheet is required to determine whether the available dynamic range satisfies the intended audio or instrumentation noise target.
Recomendado
Microcontroller-Controlled Measurement
The AD779JN is well suited to measurement systems controlled by a microprocessor or other parallel-bus controller. Its 14-bit parallel interface presents the conversion result directly to digital logic, avoiding a serial-conversion stage, while the internal sample-and-hold amplifier, voltage reference, and clock circuitry reduce the number of external blocks. The 128 kSPS capability provides substantial throughput for sensor monitoring and control loops. System timing must account for acquisition, conversion, and data-access intervals specified by Analog Devices. Because no verified pin-level timing table or supply limits were included in the supplied results, the controller design should not be released until the official datasheet confirms logic thresholds, settling requirements, and power sequencing.
Recomendado
Retrofit and Long-Lifecycle Instrumentation
The AD779JN’s 28-pin PDIP package is useful for instruments and test equipment built around through-hole analog boards. It combines a complete monolithic conversion path, including the sample-and-hold amplifier, reference, clock circuitry, and digital interface, within one standard DIP footprint. This can simplify repair, qualification, and subsystem replacement compared with a discrete converter implementation. The Analog Devices product information states that some AD779 versions are available in versions compliant with MIL-STD-883, but the exact compliance status of the AD779JN ordering code must be checked rather than inferred. For long-lifecycle equipment, review the current lifecycle status, grade-specific temperature range, dated specifications, and availability with the manufacturer or an authorized distributor.
Recomendado
Resumo dos produtos recomendados
Dados de referência de engenharia para AD779JN — comparação, orientação de projeto e informações de conformidade.
Guia de seleção
Comparação com alternativas
| Parâmetro | Este produto | AD779KN | AD779KR | AD779KD | AD779BN | AD779TR |
|---|---|---|---|---|---|---|
| Brand | Analog Devices | Analog Devices | Analog Devices | Analog Devices | Analog Devices | Analog Devices |
| Package | 28-PDIP | 28-PDIP | 28-PDIP | 28-PDIP | 28-PDIP | 28-PDIP |
| Resolution | 14 bit | 14 bit | 14 bit | 14 bit | 14 bit | 14 bit |
| Sampling Rate | 128 kSPS | 128 kSPS | 128 kSPS | 128 kSPS | 128 kSPS | 128 kSPS |
| Number of Input Channels | 1 channel | 1 channel | 1 channel | 1 channel | 1 channel | 1 channel |
| Digital Interface | 14-bit microprocessor-compatible parallel bus | AD779-family parallel bus | AD779-family parallel bus | AD779-family parallel bus | AD779-family parallel bus | AD779-family parallel bus |
| Integrated Functions | SHA, voltage reference, clock generation, and parallel interface | SHA, voltage reference, clock generation, and parallel interface | SHA, voltage reference, clock generation, and parallel interface | SHA, voltage reference, clock generation, and parallel interface | SHA, voltage reference, clock generation, and parallel interface | SHA, voltage reference, clock generation, and parallel interface |
Principais diferenciais
- Complete monolithic conversion function (vs AD779KD)
- Same-family electrical architecture (vs AD779KN)
- Parallel microprocessor interface (vs AD779BN)
- Through-hole 28-pin PDIP implementation (vs AD779TR)
Notas de projeto
Follow the Analog Devices recommended application circuit for input conditioning, reference connections, and bypass capacitors. Keep the AD779JN close to the signal source when the source impedance is appreciable, because the integrated sample-and-hold amplifier and input network must settle within the acquisition interval specified in the datasheet. Route the 14-bit parallel bus away from the analog input and reference paths, and provide a continuous ground plane beneath the device while routing high-current digital return currents away from the sensitive analog area.
Use the manufacturer’s timing values for chip-select, read, conversion-start, and output-data control rather than treating the 14-bit bus as a generic parallel interface. Account for setup and hold requirements, output settling, and the time available for acquisition at the selected conversion rate. Series termination may be evaluated if ringing appears on fast digital transitions, but source termination, trace loading, and the controller output timing should be validated together rather than tuned independently.
Do not assume that identical resolution and sampling rate make every AD779 suffix interchangeable. The Analog Devices family information identifies K, B, and T grades, which can differ in characterized AC performance, DC accuracy, environmental limits, and qualification. For any proposed replacement, compare the exact suffix against the original design’s temperature range, reference requirements, acquisition timing, and test limits. Also verify the 28-pin PDIP pinout and package drawing from the official datasheet before approving a footprint or substituting the part.
Informações de conformidade
The Analog Devices product information states that some AD779 versions are available in versions compliant with MIL-STD-883, but the supplied data does not establish that status for the AD779JN ordering code. RoHS, REACH, lead-free, halogen-free, and conflict-minerals status remain unknown.