AD579JN - 10-Bit, 2.4 us Successive-Approximation ADC | Analog Devices
料号： AD579JN ✗ 停产AD579JN 概述
An ADC is a data-converter semiconductor that transforms a continuously varying analog voltage into a numerical value. In the broader hierarchy, an ADC belongs to data-converter ICs alongside DACs, voltage references, and interface circuits. Successive-approximation ADCs compare the unknown input with a series of internally generated trial thresholds. This architecture is widely used when moderate resolution, deterministic conversion timing, compact size, and straightforward digital readout are more important than the extreme throughput or resolution associated with high-end flash or high-speed converters.
The AD579JN provides 10-bit conversion resolution, two analog input channels, and a reported conversion time of 2.4 microseconds. These characteristics suit industrial monitoring, process-control instrumentation, laboratory measurement, and embedded control systems that need repeatable conversion of sensor outputs into digital values. The 32-pin SBCDIP package also exposes a substantial number of digital and control connections compared with compact surface-mount ADC packages.
Successive-approximation operation gives the converter a familiar acquisition-and-conversion cycle. The system presents an input voltage, initiates a conversion, and reads the resulting code from the digital output interface. Control and status signals support integration into a larger measurement system, while reference and analog-input connections establish the voltage range represented by the converter. Exact timing, input ranges, logic levels, and acquisition requirements should be confirmed in the ADI datasheet before final circuit release.
The AD579JN is especially relevant to designs requiring a through-hole converter with two input channels and 10-bit resolution. It can support redundant sensing, differential measurements, or multiplexed sensor conditioning when the surrounding circuitry provides the required reference and common-mode behavior. Because the device is offered in a 32-pin SBCDIP package, designers benefit from accessible leads for inspection and rework while accepting the larger board footprint of a through-hole DIP.
Before layout, define the analog reference source, input range, acquisition time, conversion trigger method, and digital interface configuration. Place input and reference paths away from switching-current edges, use a stable ground reference, and route the digital outputs away from sensitive analog nodes. Check the required settling interval between selecting an input and starting conversion; adequate acquisition time is essential when the source impedance is not low.
This product page combines the core AD579JN operating facts, package information, sourcing details, practical application guidance, and a disciplined replacement assessment. Engineers can use the comparison and selection information to assess whether its 10-bit resolution, two-channel architecture, 2.4 microsecond conversion time, and 32-pin through-hole package match the mechanical and measurement requirements of the target system.
直接替换替代料： AD579JN ——相同封装，引脚兼容。需要 PCB 改动的不同封装料号已排除。
该产品暂无直接替换替代料。
请求替代料AD579JN 最大额定值与电气特性
| ADC Type | Successive-approximation ADC |
| 分辨率 | 10 bit |
| Number of Analog Input Channels | 2 channels |
| Conversion Time | 2.4 us |
| Output Interface | Parallel/serial |
| Operating Temperature Grade | Commercial |
| Screening Level | MIL-STD-883 Class B |
| Package Type | 32-pin SBCDIP |
| Package Code | DIP |
| Package Shape | Rectangular |
| Terminal Form | Through-hole |
| Number of Terminals | 32 terminals |
| 安装类型 | Through-hole |
AD579JN rectangular 引脚配置指南
AD579JN（rectangular 封装）的引脚配置。 该模拟元件具有输入、输出和电源引脚。请参阅制造商数据手册以了解失调调零、补偿和使能引脚配置。适用于信号调理和放大器电路。
暂无详细引脚数据： AD579JN.
请参阅 数据手册 以查看完整引脚配置。
典型应用
AD579JN 适用于 6 应用s: Industrial Process Monitoring, Dual-Sensor Data Acquisition, Laboratory Instrumentation, Embedded Control Systems, Redundant Sensor Monitoring, Legacy Equipment Repair.
Industrial Process Monitoring
The AD579JN fits industrial process monitoring where two conditioned sensor outputs must be digitized into 10-bit values. Its two analog input channels and 2.4 microsecond successive-approximation conversion time allow a controller to sample more frequently than many slow measurement systems. Place the converter between a front-end signal conditioner and the control MCU or PLC, and drive its reference from a stable source. Because the device is obsolete, use it primarily in maintenance or legacy-control programs rather than new long-life production equipment.
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Dual-Sensor Data Acquisition
The AD579JN is appropriate for dual-sensor acquisition when both inputs represent signals within the converter's specified range and share a compatible reference strategy. Two inputs and 10-bit resolution provide 1024 digital codes per channel, while the 2.4 microsecond conversion time supports rapid sequential measurements. Use controlled input multiplexing only if acquisition time is long enough for the selected source to settle. For applications requiring greater accuracy or lower noise, calculate the full error budget including reference drift, quantization, input noise, and acquisition error.
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Laboratory Instrumentation
The AD579JN can serve as the measurement front end in laboratory instrumentation that converts two analog test signals into digital data. The 10-bit SAR architecture provides a straightforward path between an analog input network and a digital processor, while the 32-pin SBCDIP package leaves accessible leads for bench prototypes and diagnostic work. Use the parallel interface where throughput or data capture simplicity matters, or the serial interface where board wiring is constrained. Validate input bandwidth and settling against the intended test bandwidth before selecting the acquisition timing.
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Embedded Control Systems
The AD579JN is useful in embedded control systems that must acquire two analog feedback signals for an MCU-based control loop. A conversion time of 2.4 microseconds leaves room for digital control processing when the application does not require high-rate waveform capture. Connect the digital output to the controller using the interface timing defined in the ADI datasheet, and synchronize acquisition with control updates. The obsolete lifecycle status makes a currently supported ADC preferable for new embedded platforms unless preserving an existing board architecture is essential.
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Redundant Sensor Monitoring
The AD579JN's two analog input channels make it practical to monitor redundant sensors and compare their behavior within a controller or safety-related monitoring system. The 10-bit codes can support plausibility checks, drift detection, or diagnostic comparison when both channels use the same reference and input-conditioning characteristics. Equal scaling improves comparability, but channel offset, gain error, and simultaneous temperature drift must be included in the system budget. Independent references or differently scaled sensors require explicit calibration in firmware.
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Legacy Equipment Repair
The AD579JN is particularly useful for repairing or extending legacy laboratory and industrial equipment that already uses its 32-pin SBCDIP footprint. Its 10-bit resolution, two analog channels, and parallel or serial readout reproduce the defining functions of the installed converter. Confirm the existing schematic, supply rails, reference voltage, logic levels, and acquisition timing before ordering a replacement. Through-hole construction also simplifies inspection and board-level rework compared with converting the design to a fine-pitch surface-mount ADC.
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工程参考数据： AD579JN ——对比、设计指导和合规信息。
选型指南
与替代料对比
| 参数 | 本产品 |
|---|---|
| ADC Architecture | Successive-approximation ADC |
| Resolution | 10 bit |
| Analog Input Channels | 2 channels |
| Conversion Time | 2.4 us |
| Digital Interface | Parallel/serial |
| Package | 32-pin SBCDIP |
| Brand | Analog Devices |
| Terminals | 32 through-hole terminals |
| Temperature Grade | Commercial |
| Screening | MIL-STD-883 Class B |
设计说明
Do not treat the 2.4 microsecond conversion time as the complete acquisition-and-conversion interval. The input must first acquire and settle to the required accuracy. Calculate the maximum source impedance, switch resistance, and capacitor charging time against the acquisition specification in the ADI datasheet. Triggering a conversion too soon after changing the selected channel can produce inaccurate codes even when the converter itself completes nominally.
Maintain short, symmetric analog traces from the sensor or conditioning network to the AD579JN inputs. Keep digital clock and output traces away from the analog inputs and reference connection, especially where switching edges can couple into high-impedance nodes. Use a continuous ground reference appropriate to the circuit topology and place input and reference bypass components close to their associated pins. Follow the manufacturer pinout and layout guidance when assigning the 32 through-hole leads.
Design the reference source for the voltage and noise required by the measurement accuracy, and follow the datasheet limits for bypassing and decoupling. Reference noise appears directly in the converted result, while supply disturbances can influence accuracy and noise performance. Decouple supply pins close to the device and keep analog and digital return-current paths controlled. Because lifecycle availability is limited, confirm that the exact obsolete configuration remains procurable before finalizing a production BOM.
合规信息
The commercial-grade AD579JN is identified as MIL-STD-883 Class B screened. RoHS, REACH, lead-free, halogen-free, and conflict-minerals status were not established. AEC-Q100 is not applicable to the identified commercial device.
