AD572AD - 12-Bit Successive Approximation ADC | Analog Devices
料号： AD572AD ✓ 量产中AD572AD 概述
An ADC is a data-conversion IC that transforms a continuously varying analog voltage into a digital code for processing, measurement, or control. The AD572 belongs to the ADC hierarchy, where it is more specifically a successive-approximation converter, sometimes called a SAR ADC. Unlike a flash converter, this architecture compares the input against successively refined internal references and therefore supports relatively high resolution with a practical internal circuit arrangement.
The AD572AD's principal specifications include 12-bit resolution, differential input capability, parallel and serial output options, and a 32-pin DIP package. Its internal reference and buffer amplifier reduce the number of external signal-conditioning elements required for many measurement systems. Active laser trimming of thin-film resistors helps establish stable conversion characteristics without relying on ordinary uncorrected resistor tolerances.
The hybrid construction is significant because it divides the converter into digital and linear functional blocks. The MSI digital section manages conversion sequencing and data output, while the monolithic linear section supports the reference, comparator, and signal-buffer functions. This architecture allows the converter to operate as a largely complete acquisition element rather than requiring a separate clock, reference source, comparator, and input buffer.
AD572AD is suited to industrial process measurement, instrumentation, laboratory data acquisition, closed-loop control, and test systems where a 12-bit conversion result and selectable parallel or serial data handling are useful. The through-hole DIP format also suits legacy industrial equipment and prototypes assembled with conventional through-hole insertion methods.
Designers should follow the Analog Devices AD572 datasheet for the exact analog input range, conversion timing, logic levels, reference behavior, and recommended decoupling. Because this converter combines an internal reference with analog input conditioning, stable grounding and careful routing of the analog and digital return paths remain important. Review the complete pin description table before assigning board nets or selecting bypass-capacitor locations.
This product page consolidates the known resolution, converter architecture, package, interface options, and construction details with practical sourcing, application, comparison, and design guidance. It also distinguishes verified drop-in alternatives from merely similar converters, helping engineers make package and pin-compatibility decisions before committing to a replacement.
直接替换替代料： AD572AD ——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AD572AD 最大额定值与电气特性
| Converter Type | Successive-approximation analog-to-digital converter |
| 分辨率 | 12 bit |
| Data Output Interface | Parallel and serial |
| Input Type | Differential |
| Internal Clock | Included |
| Internal Reference | Included |
| Internal Comparator | Included |
| Internal Buffer Amplifier | Included |
| Resistor Technology | Actively laser-trimmed high-stability thin-film resistors |
| IC Construction | Hybrid MSI digital and linear monolithic chips |
| Package Type | 32-pin DIP |
| Package Code | DIP |
| Terminal Count | 32 terminals |
| 安装方式 | Through-hole |
| Package Shape | Rectangular |
| RoHS 状态 | unknown |
| REACH Status | unknown |
AD572AD rectangular 引脚配置指南
AD572AD（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： AD572AD.
请参阅 数据手册 以查看完整引脚配置。
典型应用
AD572AD 适用于 6 应用s: Industrial Process Measurement, Laboratory Data Acquisition, Closed-Loop Control, Test and Measurement Equipment, Sensor Signal Digitization, Legacy Equipment Upgrade.
Industrial Process Measurement
The AD572AD is suitable for industrial process-control front ends that convert a conditioned analog measurement into a 12-bit digital value. Its integrated clock, reference, comparator, and buffer amplifier can reduce the number of separate support components needed around the converter. The differential input architecture also helps the device accept signals derived from suitable sensor-conditioning circuits. The through-hole 32-pin DIP package is convenient for legacy control equipment, test fixtures, and wired industrial modules. Design the analog input network around the exact input range and acquisition timing listed in the Analog Devices AD572 datasheet.
推荐
Laboratory Data Acquisition
The AD572AD can serve as the conversion element in a laboratory measurement system that accepts an analog voltage and transfers the resulting code to a controller or instrument. Its 12-bit resolution, internal clock, internal reference, and selectable parallel or serial output provide useful flexibility for instrumentation. The 32-pin DIP package supports conventional through-hole prototyping and repair work. For accurate measurements, keep sensitive analog routing away from digital outputs and use the manufacturer's reference and decoupling recommendations to prevent the converter from inheriting system noise.
推荐
Closed-Loop Control
The AD572AD fits closed-loop industrial control applications in which a measured analog variable must be converted before a controller compares it with a command or set point. The complete converter integration includes the clock, reference, comparator, and buffer amplifier, making the device suitable for compact acquisition subsystems. Its parallel interface can support high-speed deterministic sampling, while the serial interface can simplify connections where fewer data lines are available. Control-loop design must verify the conversion latency and acquisition rate rather than assuming that interface selection alone determines loop performance.
推荐
Test and Measurement Equipment
The AD572AD can be used in test equipment for digitizing a controlled or measured analog input and comparing the converted result with limits or calibration data. Its 12-bit code width is appropriate for many general-purpose measurement tasks, while the internal reference and clock reduce the support circuitry required for a self-contained channel. The 32-pin DIP package is especially useful for legacy instruments and service boards that use through-hole components. A practical implementation should use separate analog and digital ground planning and should follow the datasheet's input settling requirements before taking a sample.
推荐
Sensor Signal Digitization
The AD572AD can digitize conditioned outputs from sensors used in industrial monitoring, environmental equipment, or process control. The differential input arrangement can support a balanced sensor front end, while the integrated buffer amplifier, reference, comparator, and clock make the ADC suitable for compact acquisition blocks. Because sensor accuracy depends on the entire signal chain, the design should control grounding, shielding, and input bandwidth rather than treating the converter as the only source of error. Verify the AD572AD's differential input limits and common-mode requirements before selecting the sensor amplifier.
推荐
Legacy Equipment Upgrade
The AD572AD is a practical candidate when repairing or modernizing legacy electronics that use a 32-pin through-hole converter and require 12-bit successive-approximation performance. The DIP package simplifies mechanical replacement compared with surface-mount converter options, while the integrated clock and reference can simplify an existing design that used separate components. A drop-in replacement cannot be assumed solely from resolution and package; the full pinout, logic levels, input range, timing, and supply requirements must match. This makes direct AD572AD reuse preferable to an unqualified substitute in service equipment.
推荐
推荐产品汇总
工程参考数据： AD572AD ——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 |
|---|---|
| Package | 32-pin DIP |
| Brand | Analog Devices |
| Resolution | 12 bit |
| Converter Architecture | Successive approximation |
| Data Interface | Parallel and serial |
| Input Type | Differential |
| Internal Clock | Included |
| Internal Reference | Included |
| Mounting Style | Through-hole |
| Resistor Construction | Actively laser-trimmed high-stability thin-film resistors |
设计说明
Use the manufacturer's AD572 pin-description table to assign all 32 terminals before routing the PCB. Keep the analog input and reference paths compact, place bypass capacitors at their intended power pins, and avoid routing clock and data lines directly beneath sensitive input traces. The through-hole DIP package permits generous spacing between pins, but that does not compensate for poor analog routing. A clear separation between analog and digital return paths reduces coupling from parallel data output transitions into the measured input.
Do not treat AD7544, AD7535, or AD7524 as drop-in replacements merely because they perform similar conversion functions. Their available product information states that pinouts or package types may differ. Verify every terminal, the analog input range, supply requirements, reference arrangement, conversion timing, and output protocol against the AD572AD documentation. Also confirm that the acquisition source can meet the AD572AD's settling and sampling requirements; otherwise, the nominal 12-bit resolution does not translate into 12-bit measurement accuracy.
Plan analog and digital grounding deliberately around the converter and its interface. Because the AD572AD includes a buffer amplifier, reference, comparator, and clock, the package still receives noise-sensitive analog signals and produces fast-changing digital outputs. Route the input and reference nets away from clock and data traces, use short ground-return paths, and apply the datasheet's decoupling recommendations. This is especially important in instrumentation systems where low-level sensor signals are converted to 12-bit codes.
Treat the conversion result as meaningful only when the analog input has settled within the converter's acquisition requirements. Establish the sampling point relative to the clock, observe the required acquisition interval, and avoid changing the source impedance near the sampling instant without revalidating settling behavior. When using the serial interface, check clock polarity and data timing at the receiving device. When using parallel outputs, account for switching-current coupling when the output bus changes between codes.
合规信息
No explicit RoHS, REACH, lead-free, halogen-free, or conflict-minerals statement is shown in the manufacturer product page or listing records. AEC-Q100 qualification is not indicated for this older hybrid through-hole converter.
