AD9241AS - 14-Bit 1.25 MSPS ADC | Analog Devices
料号： AD9241AS ⚠ 最后一次采购AD9241AS 概述
The AD9241AS is a complete 14-bit, 1.25 MSPS monolithic ADC rather than a system requiring separate acquisition, reference, or conversion components. Analog Devices describes the device as combining a low-cost, high-speed CMOS process with a converter architecture intended to provide the resolution and speed of hybrid implementations at lower power consumption and cost. The integrated sample-and-hold amplifier simplifies the input signal path, while the programmable internal reference can be supplemented with an external reference when accuracy and temperature-drift requirements demand it.
Key electrical characteristics include 2.5 LSB integral nonlinearity error, 0.6 LSB differential nonlinearity error, and 0.36 LSB input-referred noise. These figures are important for applications in which gain error, differential nonlinearity, and noise affect the usable dynamic range of the acquisition channel. The device also includes complete converter functionality on-chip, allowing the external circuitry to focus on input conditioning, clocking, digital interface implementation, and post-processing.
Typical uses include industrial data-acquisition modules, process-control instrumentation, communications receivers, medical and scientific measurement systems, and embedded test equipment. The 1.25 MSPS sampling rate is appropriate for many sensor, waveform, and communications front ends that require precise conversion without the throughput of a very high-speed data converter. Designers should pay particular attention to analog input range, reference configuration, clock jitter, supply decoupling, and digital output timing when creating the surrounding circuitry.
For PCB implementation, use a low-noise reference arrangement, provide short and symmetrical input paths, place decoupling capacitors close to the supply pins, and route clock and data signals away from sensitive analog inputs. The AD9241AS is marked LAST TIME BUY by Analog Devices, so procurement planning should confirm availability and remaining supply before a new production design is released. This page combines the manufacturer product information, datasheet details, lifecycle status, application guidance, and confirmed cross-reference data to support engineering selection and sourcing.
直接替换替代料： AD9241AS ——相同封装，引脚兼容。需要 PCB 改动的不同封装料号已排除。
AD9241ASZ
✅ 直接替换📋 参考替代料（不在目录中）
AD9241ASZRL
✅ 直接替换📋 参考替代料（不在目录中）
AD9241AS 最大额定值与电气特性
| 分辨率 | 14 bit |
| 采样率 | 1.25 MSPS |
| Converter Type | Monolithic ADC |
| 电源电压 | +5 V |
| Power Dissipation | 60 mW |
| Integral Nonlinearity Error | 2.5 LSB |
| Differential Nonlinearity Error | 0.6 LSB |
| Input-Referred Noise | 0.36 LSB |
| Sample-and-Hold Amplifier | On-chip |
| Voltage Reference | Programmable on-chip reference |
| External Reference Support | Supported |
| Architecture | CMOS monolithic architecture |
AD9241AS standard 引脚配置指南
AD9241AS（standard 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： AD9241AS.
请参阅 数据手册 以查看完整引脚配置。
典型应用
AD9241AS 适用于 6 应用s: Industrial Process Instrumentation, Communications Receiver Front End, Medical and Scientific Measurement, Waveform and Vibration Analysis, Embedded Test and Measurement, Control and Condition Monitoring.
Industrial Process Instrumentation
The AD9241AS fits sensor and process-signal acquisition front ends that require 14-bit resolution at a 1.25 MSPS sampling rate. Place it behind a low-noise input amplifier and anti-alias filter, then use its integrated sample-and-hold amplifier to reduce the external acquisition-component count. The 60 mW power specification is useful in compact instrumentation, while 0.36 LSB input-referred noise and 0.6 LSB differential nonlinearity help preserve measurement fidelity. The design must still verify the required analog input range, common-mode level, calibration method, and operating-temperature grade against the exact orderable part.
推荐
Communications Receiver Front End
The AD9241AS can convert intermediate or baseband signals in communication equipment requiring a compact 14-bit converter. Its 1.25 MSPS rate provides sufficient throughput for numerous narrowband and control channels, while the low-noise sample-and-hold front end supports a clean transition from the analog receiver to digital processing. Use a low-jitter sampling clock, a carefully controlled input gain stage, and impedance-matched routing to preserve signal integrity. Confirm the converter's digital output timing and electrical interface before selecting the external FPGA or digital-processing device.
推荐
Medical and Scientific Measurement
The AD9241AS supports compact laboratory and medical-instrument signal acquisition when 14-bit resolution and 1.25 MSPS throughput meet the measurement bandwidth. Its integrated sample-and-hold amplifier and 0.36 LSB input-referred noise reduce the number of precision components around the converter. The monolithic 60 mW design can simplify portable instrumentation, but medical use requires application-specific validation of leakage, isolation, environmental conditions, and quality-system requirements. Use an external reference only when the measured DC accuracy or temperature drift warrants that added circuit complexity.
推荐
Waveform and Vibration Analysis
The AD9241AS is appropriate for vibration, transient, and general waveform monitoring where the required bandwidth fits the 1.25 MSPS conversion rate. The 14-bit word length provides a useful balance between dynamic range, data throughput, and processing cost, while the 0.6 LSB differential nonlinearity specification supports consistent code-width behavior. Place anti-alias filtering before the ADC, isolate the clock from analog inputs, and account for aliasing during range selection. For higher-frequency or wider-dynamic-range analysis, compare the part with the AD9023AZ before finalizing the architecture.
推荐
Embedded Test and Measurement
The AD9241AS can serve as the acquisition element in embedded oscilloscope, signal-analyzer, and automated test equipment. Its 1.25 MSPS rate is well matched to lower-bandwidth instrumentation, while 14-bit resolution supports calibrated amplitude measurements without an excessively large data path. The integrated sample-and-hold amplifier and programmable reference reduce analog-board complexity. Designers should budget for a stable sampling clock, gain calibration, digital correction, and adequate supply decoupling, and should verify the exact package and temperature options before committing the instrument to a production platform.
推荐
Control and Condition Monitoring
The AD9241AS supports fast control-loop and condition-monitoring systems that need more dynamic range than a low-resolution sensor interface but do not require multi-megahertz conversion. The 14-bit resolution and 0.36 LSB input-referred noise provide a useful measurement floor for vibration, position, and process feedback signals. Its low 60 mW power specification helps where controller boards have limited thermal capacity. Place the converter close to the analog sensor or amplifier, decouple the +5 V rail locally, and use digital calibration to compensate for offset and gain error before closing the control loop.
推荐
推荐产品汇总
工程参考数据： AD9241AS ——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 | AD9241ASZ | AD9241ASZRL |
|---|---|---|---|
| Brand | Analog Devices | Analog Devices | Analog Devices |
| Resolution | 14 bit | 14 bit | 14 bit |
| Sampling Rate | 1.25 MSPS | 1.25 MSPS | 1.25 MSPS |
| Input Count | 1 input | 1 input | 1 input |
| Architecture | Pipelined | Pipelined | Pipelined |
| Supply Voltage | +5 V single supply | +5 V single supply | +5 V single supply |
| Power Dissipation | 60 mW | 60 mW | 60 mW |
| Integral Nonlinearity Error | 2.5 LSB | 2.5 LSB | 2.5 LSB |
| Differential Nonlinearity Error | 0.6 LSB | 0.6 LSB | 0.6 LSB |
| Input-Referred Noise | 0.36 LSB | 0.36 LSB | 0.36 LSB |
| Reference | Programmable on-chip reference with external-reference option | Programmable on-chip reference with external-reference option | Programmable on-chip reference with external-reference option |
关键差异点
- Maintains the core AD9241 conversion specification across the identified family suffix （对比 AD9241ASZ)
- Uses a monolithic converter with integrated acquisition functions （对比 AD9241ASZ)
- Preserves AD9241-family architecture for controlled replacement planning （对比 AD9241ASZRL)
设计说明
Place the input, reference, and supply decoupling components directly beside their associated AD9241AS pins. Keep the analog input route short, use a continuous ground reference, and avoid running digital clock and data nets beneath sensitive input or reference paths. Because the converter includes an on-chip sample-and-hold amplifier, the external input network remains part of the acquisition accuracy budget, so use symmetric routing and controlled impedance where the source is not close to ground.
Use a low-jitter sampling clock and confirm the converter's clock-input amplitude and transition requirements against the manufacturer datasheet. Keep the clock trace away from the analog input and reference nodes, and terminate digital outputs appropriately for the receiving device. A stable clock is especially important because timing error can appear as noise or reduced conversion accuracy even when the analog front end is well designed.
Design the +5 V rail for low noise and place local high-frequency and bulk decoupling close to the supply pins. The AD9241AS dissipates 60 mW under the specified operating condition, but converter switching currents can still disturb sensitive reference and analog nodes. Separate the converter supply routing from motors, relays, display power stages, and other high-current loads, and verify supply ripple at the converter pins.
Do not substitute a family suffix solely by matching resolution and sampling rate. Confirm the package, pin names, input range, reference strapping, digital-output timing, temperature grade, and absolute maximum ratings for the exact orderable part. Also verify that the last-time-buy status and remaining supply meet the production schedule before freezing the schematic or layout.
合规信息
The available product and datasheet information confirms the AD9241 family, electrical performance, and LAST TIME BUY status but does not state suffix-specific compliance details. AEC-Q100 is marked not applicable because this is an industrial ADC rather than an automotive-qualified device.
