AD679AD - 14-Bit 128 kSPS Complete Sampling ADC | Analog Devices
N.º da peça: AD679AD ✓ AtivoAD679AD Visão geral
A complete sampling ADC is an integrated data-conversion device designed to acquire an analog input and present its digital result through a defined digital interface. Within the semiconductor hierarchy, the AD679AD belongs to the ADC/DAC class of integrated circuits, combining analog input conditioning and digital conversion functions in one device. The 28-pin SBCDIP package also provides a mechanically robust through-hole format for industrial and legacy system assemblies.
The primary specifications establish a clear performance baseline. AD679AD provides 14-bit resolution, operates at 128 kSPS, and uses 28-pin SBCDIP packaging. Analog Devices identifies the AD679 as a complete sampling ADC and documents it as an upgrade-path device with the same pinout as the 12-bit, 200 kSPS AD678. This relationship supports board-oriented migration planning, although resolution and sampling rate must be reviewed together.
The product page emphasizes long-term reliability relative to multichip and hybrid implementations. Combining the conversion functions into one integrated circuit reduces the number of separate assemblies that must be sourced, interconnected, and qualified. For systems requiring military-product screening, the AD679 family is available in versions compliant with MILSTD-883; the detailed ordering and test information should be confirmed in the applicable Analog Devices military data sheet.
Typical uses include precision signal acquisition, process-control measurement, communications equipment, factory data logging, and laboratory instrumentation. The 128 kSPS rate is suitable for continuous monitoring of many analog signals, while 14-bit resolution supports applications that need more detail than a lower-resolution converter. The parallel digital output allows the converter to connect directly to suitable counters, logic, DSP, or microcontroller input structures.
PCB design should follow the Analog Devices AD679 datasheet for decoupling, reference-voltage connections, analog input routing, digital timing, and ground partitioning. Keep high-speed digital traces physically separated from the analog input and reference networks, and place input and reference capacitors close to their associated pins. Because the AD679AD is a 28-pin SBCDIP device, verify the installed socket, pin orientation, and thermal environment before replacement.
This product page combines the verified AD679AD identity and ordering details with the manufacturer's upgrade-path information, package characteristics, and practical migration guidance. It also provides a parameter-by-parameter comparison with available same-family options and identifies the checks engineers should complete before substituting a converter in an existing acquisition circuit.
Alternativas drop-in para AD679AD — 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 AD679AD (mesmo formato e footprint) — diferindo em Resolution, Sampling Rate, Military Availability, Output Interface, Package.
AD679KD
✅ Drop-In ⚠️ Especificações não verificadasConsulte o preço
Ver ficha técnica →AD678AJ
✅ Drop-In ⚠️ Especificações não verificadasConsulte o preço
Ver ficha técnica →AD679AD Classificações máximas e características elétricas
| Converter Type | Complete sampling ADC |
| Resolução | 14 bit |
| Taxa de amostragem | 128 kSPS |
| Output Interface | Parallel digital output |
| Package Type | 28-pin SBCDIP |
| Total Pin Count | 28 pins |
| Estilo de montagem | Through-hole |
| Shipping Package | Tube |
| Pin Compatibility Reference | AD678 ADC, 12-bit at 200 kSPS |
| Military Version Availability | AD679 versions compliant with MILSTD-883 |
Guia de Configuração de Pinos do AD679AD tube
Configuração de pinos para AD679AD (pacote tube). 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 AD679AD.
Consulte a ficha técnica para a configuração completa dos pinos.
Aplicações típicas
AD679AD é adequado para 6 aplicaçãos: Industrial Process Measurement, Communications Receiver, Data Acquisition Instrument, Precision Control Feedback, Condition Monitoring System, Legacy Test and Measurement.
Industrial Process Measurement
The AD679AD suits process-measurement systems that require 14-bit conversion resolution at a 128 kSPS acquisition rate. The complete sampling ADC provides parallel digital results for counters, programmable logic, or a DSP, allowing the analog measurement stage to remain compact. In a controller, the converter can digitize a conditioned sensor signal before filtering, limits checking, and setpoint evaluation. Its 28-pin SBCDIP format is appropriate for equipment using through-hole assembly and socketed or soldered industrial boards. Validate the verified input range, reference voltage, and accuracy limits before selecting resistor and amplifier values.
Recomendado
Communications Receiver
AD679AD can be used where a communications receiver needs to convert a sampled analog waveform into parallel digital data for channelization, demodulation, or filtering. Its 128 kSPS sampling rate establishes the available sample throughput, while 14-bit resolution preserves amplitude detail for downstream detection and recovery. The parallel interface supports connection to FPGA, DSP, or programmable counter logic when timing and voltage compatibility are checked. Designers should use the manufacturer datasheet for clock requirements, output timing, reference handling, and digital-interface voltage levels before finalizing the receiver layout.
Recomendado
Data Acquisition Instrument
The AD679AD is applicable to laboratory and bench-top data-acquisition equipment that benefits from 14-bit measurement resolution without requiring the AD678's 200 kSPS sampling rate. A complete sampling ADC can reduce the number of discrete elements required for an acquisition channel and provide a direct parallel output to a controller. The SBCDIP package simplifies integration with through-hole data-acquisition boards and allows replacement without using a fine-pitch surface-mount footprint. For accurate measurements, evaluate input bandwidth, settling behavior, reference stability, grounding, and calibration using the electrical-characteristics and application guidance in the AD679 datasheet.
Recomendado
Precision Control Feedback
AD679AD can digitize feedback or monitor signals in precision industrial control equipment where 14-bit resolution improves measurement granularity. The 128 kSPS rate is sufficient for many slow and medium-speed control loops, allowing the sampled value to be compared with a reference and applied through a controller or DSP. Its parallel output can feed digital filtering, compensation, and fault-detection logic. The main engineering trade-off is against the AD678: the AD679 improves resolution but samples more slowly, so loop bandwidth and acquisition latency must be calculated using the intended update rate.
Recomendado
Condition Monitoring System
The AD679AD is suitable for condition-monitoring equipment that records analog sensor values such as vibration, temperature-derived signals, or pressure outputs. At 128 kSPS, it can provide a continuous stream of 14-bit samples for time-domain analysis, while parallel outputs allow direct connection to logging or processing logic. The 28-pin SBCDIP package supports robust through-hole assembly in industrial monitoring equipment. Signal-chain design still requires attention to sensor excitation, anti-alias filtering, input protection, reference accuracy, grounding, and calibration; these conditions determine whether the converter's resolution produces useful field performance.
Recomendado
Legacy Test and Measurement
AD679AD can support upgrade and maintenance work in legacy test and measurement instruments that use a 28-pin SBCDIP data-conversion position. Its 14-bit, 128 kSPS complete sampling ADC provides a defined migration path for systems previously using the 12-bit, 200 kSPS AD678 with the same pinout. This makes it possible to reuse much of the board architecture when higher resolution is preferred and the lower sampling rate remains acceptable. Technicians should verify supply levels, pin functions, reference implementation, clocking, and timing because a shared pinout does not eliminate all functional differences.
Recomendado
Resumo dos produtos recomendados
Dados de referência de engenharia para AD679AD — comparação, orientação de projeto e informações de conformidade.
Guia de seleção
Comparação com alternativas
| Parâmetro | Este produto | AD679KD | AD678 |
|---|---|---|---|
| Brand | Analog Devices | Analog Devices | Analog Devices |
| Package | 28-pin SBCDIP | 28-pin SBCDIP | 28-pin SBCDIP |
| Resolution | 14 bit | 14 bit | 12 bit |
| Sampling Rate | 128 kSPS | 128 kSPS | 200 kSPS |
| Mounting Style | Through-hole | Through-hole | Through-hole |
Principais diferenciais
- Higher conversion resolution than the same-pinout AD678 (vs AD678)
- Lower sampling rate than the same-pinout AD678 (vs AD678)
- Compatible mechanical upgrade path for AD678-based boards (vs AD678)
- Family availability of screened military versions (vs AD678)
Notas de projeto
Route the analog input and reference networks as short, controlled-impedance paths, and place their associated bypass or decoupling capacitors close to the appropriate AD679AD pins. Keep digital output and control traces away from sensitive analog nodes to reduce coupling. Follow the analog and ground partitioning shown in the Analog Devices AD679 manufacturer datasheet rather than relying on a general-purpose layout pattern.
Use the manufacturer pin-description and timing information when assigning the parallel output bus and clock connections. Confirm output drive capability, logic thresholds, setup and hold requirements, and allowable trace loading before adding cables, buffers, or additional capacitance. Because AD679AD and AD678 share a pinout, verify timing behavior separately even when the physical board position is unchanged.
Do not treat the AD679AD-to-AD678 change as a specificationally equivalent upgrade. The AD679AD provides 14-bit resolution at 128 kSPS, whereas the AD678 provides 12-bit resolution at 200 kSPS. Scaling, filtering, bandwidth, calibration, and system-latency calculations must reflect both differences. Also verify the exact AD679 ordering suffix, temperature grade, package, and military-screening requirements.
Use a stable, low-impedance reference arrangement and provide the decoupling network specified by the Analog Devices AD679 manufacturer datasheet. Check reference tolerance, noise, startup behavior, and loading at the actual operating conditions. For a through-hole SBCDIP implementation, inspect socket or solder-joint quality and provide adequate clearance around the 28-pin device for inspection and assembly.
Informações de conformidade
Analog Devices states that the AD679 family is available in versions compliant with MILSTD-883. Specific RoHS, REACH, lead-free, halogen-free, and conflict-minerals declarations for AD679AD were not identified.
