AD9225AR - 12-Bit 25 MSPS ADC | Analog Devices
料号： AD9225AR ✓ 量产中AD9225AR 概述
An ADC is a data-conversion IC that samples an analog voltage and converts it into a numeric value. The AD9225 belongs to the pipelined ADC family, a multistage architecture commonly used for conversion rates from tens of megasamples per second to hundreds of megasamples per second. Within the broader semiconductor hierarchy, it is an analog-to-digital converter, data-converter IC, signal-processing IC, and mixed-signal semiconductor.
Key features include a 12-bit resolution, a 25 MSPS conversion rate, a guaranteed maximum differential nonlinearity error of 0.4 LSB, and guaranteed no missing codes. The converter includes both its sample-and-hold amplifier and voltage reference on chip, reducing the number of external analog components required. Its parallel output architecture supports direct connection to FPGA, CPLD, or data-capture logic for deterministic sampling throughput.
The AD9225 uses a multistage differential pipelined architecture and supports a differential input arrangement with VIN and VINB connections. The manufacturer datasheet recommends centering the analog-input common-mode voltage at approximately 2.5 V by driving VINB from a low-impedance 2.5 V source. With the VREF pin connected directly to SENSE, the reference voltage is 1 V and the corresponding input span is 2 V p-p; the stated valid input-signal range is 1.5 V to 3.5 V.
Typical uses include industrial process monitoring, communications infrastructure, digital oscilloscopes, radar and sonar signal chains, waveform capture, and precision control loops. The AD9225 is especially appropriate when 25 MSPS sampling is sufficient and parallel output provides an advantage over serial-interface converters. Its integrated sample-and-hold and reference functions simplify board design while the single +5 V supply reduces multi-rail complexity.
The main design trade-off is input bandwidth and signal integrity at 25 MSPS. Differential routing, controlled impedance, a low-noise +5 V supply, proper reference decoupling, and careful return-path management are essential for preserving full-scale accuracy. Engineers should also account for digital-output timing when routing 12 parallel data bits plus clock signals into acquisition logic.
This page consolidates the verified manufacturer specifications, current distributor availability, family pin-compatibility information, practical application guidance, and parameter-level replacement analysis. It is designed to help engineers determine whether the AD9225AR fits their acquisition architecture before purchasing or redesigning the board.
直接替换替代料： AD9225AR ——相同封装，引脚兼容。需要 PCB 改动的不同封装料号已排除。
本系列中的变体
可与以下型号直接替换的同系列型号： AD9225AR （相同外形与封装尺寸） ——差异在于 Converter Type, Maximum Sampling Rate, Package, Supply Voltage.
AD9225AR 最大额定值与电气特性
| Converter Type | Monolithic pipeline ADC |
| 分辨率 | 12 bit |
| Maximum Sampling Rate | 25 MSPS |
| Architecture | Multistage differential pipelined |
| Input Configuration | Single input, differential analog input arrangement |
| 电源电压 | +5 V |
| Power Dissipation | 280 mW |
| Maximum Differential Nonlinearity Error | 0.4 LSB |
| Missing Code Performance | No missing codes guaranteed |
| On-Chip Sample-and-Hold Amplifier | Yes |
| On-Chip Voltage Reference | Yes |
| Internal Reference Voltage | 1 V with VREF connected directly to SENSE |
| Input Span | 2 V p-p |
| Valid Input Signal Range | 1.5 V to 3.5 V |
| Recommended Input Common-Mode Voltage | Approximately 2.5 V |
| 封装 | 28-pin SOIC W |
| 安装类型 | Surface Mount |
| RoHS 状态 | Compliant |
AD9225AR 28-pin soic w 引脚配置指南
AD9225AR（28-pin soic w 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： AD9225AR.
请参阅 数据手册 以查看完整引脚配置。
典型应用
AD9225AR 适用于 6 应用s: Communications Signal Acquisition, Industrial Process Monitoring, Digital Oscilloscope Front End, Radar and Sonar Return Processing, Precision Control and Measurement Loops, Data Acquisition and Test Equipment.
Communications Signal Acquisition
The AD9225AR fits communications and baseband acquisition systems requiring 12-bit conversion data at rates up to 25 MSPS. According to the AD9225 manufacturer datasheet Rev. C, the converter uses a multistage differential pipelined architecture and provides parallel outputs for direct capture by FPGA or CPLD logic. Place VIN and VINB on controlled-impedance, differentially routed traces and center the input common mode near 2.5 V. The principal benefit is deterministic parallel throughput, although system designers must verify bandwidth, output timing, and clock-crossing requirements against the downstream logic.
推荐
Industrial Process Monitoring
The AD9225AR is suitable for industrial measurement systems that need repeatable 12-bit samples at up to 25 MSPS without a multi-rail converter arrangement. According to the AD9225 manufacturer datasheet Rev. C, it operates from a single +5 V supply and integrates the sample-and-hold amplifier and voltage reference. Its 0.4 LSB maximum differential nonlinearity specification and guaranteed no-missing-code performance help support predictable signal-chain behavior. Use short analog traces, solid grounding, and decoupled supply rails, while ensuring the input remains within the specified 1.5 V to 3.5 V range.
推荐
Digital Oscilloscope Front End
The AD9225AR can serve as the analog acquisition stage in a digital oscilloscope or portable waveform instrument when 25 MSPS and 12-bit resolution are adequate. According to the AD9225 manufacturer datasheet Rev. C, the converter provides parallel digital outputs and integrates its sample-and-hold amplifier and voltage reference. The 280 mW typical dissipation supports a compact instrument architecture, but high-frequency board layout remains critical. Keep the analog path short, control return currents, and route the output clock and data together to minimize timing skew at the capture FPGA.
推荐
Radar and Sonar Return Processing
The AD9225AR is appropriate for intermediate-rate radar, sonar, and vibration-acquisition chains requiring 12-bit data at up to 25 MSPS. According to the AD9225 manufacturer datasheet Rev. C, its differential pipelined architecture and on-chip sample-and-hold amplifier support controlled conversion of analog returns into parallel digital words. The recommended 2.5 V common-mode level and 2 V p-p span simplify front-end matching when the input network is designed around those conditions. Engineers should budget extra routing margin for filtering, gain, aliasing control, and synchronization with the processing logic.
推荐
Precision Control and Measurement Loops
The AD9225AR can be used in closed-loop control and precision measurement systems that require more conversion throughput than a low-speed SAR ADC while accepting 12-bit resolution. According to the AD9225 manufacturer datasheet Rev. C, the converter achieves 25 MSPS, guarantees no missing codes, and limits differential nonlinearity to 0.4 LSB. Its single +5 V supply and integrated reference reduce system complexity, while parallel outputs permit direct transfer into digital control logic. Confirm acquisition latency and output timing in the complete loop because the supplied excerpts do not specify a pipeline-delay value.
推荐
Data Acquisition and Test Equipment
The AD9225AR is well suited to modular data-acquisition equipment, automated test systems, and instrumentation that captures repetitive analog waveforms at 25 MSPS. According to the AD9225 manufacturer datasheet Rev. C, its 12-bit parallel output can feed FPGA-based acquisition and processing logic without a serial interface. The integrated sample-and-hold amplifier and reference reduce external component count, while the single +5 V supply simplifies power planning. For dependable measurements, decouple both the supply and reference network, preserve the 2.5 V common-mode requirement, and verify output timing across temperature and process conditions.
推荐
工程参考数据： AD9225AR ——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 | AD9220AR |
|---|---|---|
| Package | 28-pin SOIC W | 28-pin SOIC W |
| Brand | Analog Devices | Analog Devices |
关键差异点
- Integrated acquisition front end （对比 AD9220AR)
- Guaranteed conversion linearity and code continuity （对比 AD9220AR)
- Single +5 V acquisition architecture （对比 AD9220AR)
设计说明
Route the analog input as a short, controlled-impedance differential pair and preserve the approximately 2.5 V common-mode requirement identified in the AD9225 manufacturer datasheet Rev. C. Keep the VINB return path continuous and closely coupled to VIN to minimize common-mode conversion and susceptibility to noise. Avoid routing the clock and parallel data through the analog-input region, and place any gain or filtering network close enough to the converter to minimize accumulated propagation delay.
Decouple the single +5 V supply close to the device and isolate it from switching converters and digital output currents. The AD9225 has 280 mW typical dissipation, but converter reference performance can still be disturbed by supply ripple. Use low-ESR local bypass capacitance with the values and layout prescribed by the complete manufacturer datasheet. The supplied excerpts also require capacitor networks on CAPT and CAPB for proper reference decoupling, so do not omit those network components.
Do not assume that every ADI family member with a similar 28-pin package is an electrically equivalent replacement. The manufacturer states pin compatibility with AD9220, AD9221, AD9223, and AD9224, but conversion rate, output timing, input bandwidth, and power can differ. Before substituting a family member, compare the complete AD9225 and candidate data sheets, especially clock latency, output timing, input voltage range, and acquisition bandwidth.
合规信息
The verified Mouser search result identifies AD9225AR as RoHS compliant. The supplied excerpts do not provide REACH, lead-free, halogen-free, or conflict-minerals declarations; AEC-Q100 is not applicable because this is an analog-to-digital converter rather than an automotive-qualified device.
