AD9241: 完整14位、1.25 MSPS单芯片ADC

AD9241 功能框图AD9241是一款1.25 MSPS、14位模数转换器(ADC),采用单电源供电。它采用高速、低成本的CMOS工艺及新颖的架构,分辨率和速度均达到现有混合方案的水平,而功耗与成本却低得多。这是一款完整的单芯片ADC,内置片内高性能、低噪声采样保持放大器和可编程基准电压源。也可以选用外部基准电压,以满足应用的直流精度与温度漂移要求。该器件采用多级差分流水线架构,内置数字输出纠错逻辑,在整个工作温度范围内保证无失码。AD9241的输入非常灵活,能够与成像、通信、医疗和数据采集系统实现轻松接口。真差分输入结构使单端输入和差分输入接口均支持各种输入范围。采样保持放大器(SHA)既适用于在连续通道中切换满量程电平的多路复用系统,也适合采用最高Nyquist速率及更高的频率对单通道输入进行采样。AD9241在采用直接IF下变频的通信系统中也有出色的表现,因为在差分输入模式下,SHA可以实现远超过其额定0.625 MHz Nyquist频率的出色动态性能。采用一个单时钟输入来控制所有内部转换周期。数字输出数据格式为标准二进制。超量程(OTR)信号表示溢出状况,可由最高有效位来确定是下溢还是上溢。

The AD9241 is a 1.25 MSPS, single supply, 14-bit analog-to- digital converter (ADC). It combines a low cost, high speed CMOS process and a novel architecture to achieve the resolution and speed of existing hybrid implementations at a fraction of the power consumption and cost. It is a complete, monolithic ADC with an on-chip, high performance, low noise sample-and-hold amplifier and programmable voltage reference. An external reference can also be chosen to suit the dc accuracy and temperature drift requirements of the application. The device uses a multistage differential pipelined architecture with digital output error correction logic to guarantee no missing codes over the full operating temperature range.

The input of the AD9241 is highly flexible, allowing for easy interfacing to imaging, communications, medical, and data-acquisition systems. A truly differential input structure allows for both single-ended and differential input interfaces of varying input spans. The sample-and-hold amplifier (SHA) is equally suited for both multiplexed systems that switch full-scale voltage levels in successive channels as well as sampling single-channel inputs at frequencies up to and beyond the Nyquist rate. Also, the AD9241 performs well in communication systems employing Direct-IF Down Conversion since the SHA in the differential input mode can achieve excellent dynamic performance well beyond its specified Nyquist frequency of 0.625 MHz.A single clock input is used to control all internal conversion cycles. The digital output data is presented in straight binary output format. An out-of-range (OTR) signal indicates an overflow condition which can be used with the most significant bit to determine low or high overflow.

AD9241 特点
  • 低功耗:60 mW
  • +5 V单电源
  • 积分非线性误差:2.5 LSB
  • 微分非线性误差:0.6 LSB
  • 折合到输入端噪声:0.36 LSB
  • 片内采样保持放大器和基准电压源
  • 信纳比:78.0 dB
  • 无杂散动态范围:88.0 dB
  • 超量程指示
  • 数据输出格式:标准二进制
  • 44引脚MQFP封装
AD9241 技术指标
  • Resolution (Bits): 14bit
  • # Chan: 1
  • Sample Rate: 1.25MSPS
  • Interface: Par
  • Analog Input Type: Diff-Uni,SE-Uni
  • Ain Range: (2Vref) p-p,2 V p-p,5V p-p,Uni (Vref) x 2,Uni 2.0V,Uni 5.0V
  • ADC Architecture: Pipelined
  • Pkg Type: QFP
AD9241 芯片订购指南
产品型号 封装 引脚 温度范围 包装和数量 报价*(100-499) 报价*1000 pcs
AD9241ASZ 产品状态: 量产 44 ld MQFP (13.20mm wide) 44 工业 Tray, 96 $ 11.13 $ 9.46
AD9241ASZRL 产品状态: 量产 44 ld MQFP (13.20mm wide) 44 商业 Reel, 800 - $ 9.46
AD9241 应用技术支持与电子电路设计开发资源下载
  1. AD9241 数据手册DataSheet 下载 . pdf
  2. ADI 模拟器件公司比较器产品选型指南 . pdf
  3. Analog Devices, Inc. 美国模拟器件公司产品订购手册 .pdf