AD9221: 完整12位、1.25 MSPS单芯片ADC
AD9221、AD9223和AD9220 均为新一代高性能、12位模数转换器，采用单电源供电。每款器件都具有真12位线性度和温度漂移性能1，以及11.5位或更佳的交流性能2。AD9221/AD9223/AD9220均采用相同的接口选项、封装和引脚排列。因此，该产品系列可根据性能、采样速率和功耗，向上或向下选择器件型号。这些器件的额定采样速率和功耗各不相同，体现在各自基于频率的动态性能上。AD9221/AD9223/AD9220采用高速、低成本的单CMOS工艺及新颖的架构，分辨率和速度均达到现有混合单芯片方案的水平，而功耗与成本却低得多。每款器件均为完整的单芯片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。这些器件采用多级差分流水线架构，内置数字输出纠错逻辑，在额定数据速率时可提供12位精度，并保证在整个工作温度范围内无失码。AD9221/AD9223/AD9220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采样接口均支持各种输入范围。采样保持（SHA）放大器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。此外，AD9221/AD9223/AD9220特别适合采用IF下变频的通信系统，因为在差分输入模式下，SHA可以实现远超过其额定Nyquist频率2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。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。
注释：
1 不包括内部基准电压
2 取决于模拟输入配置
The AD9221, AD9223, and AD9220 are a generation of high performance, single supply 12-bit analog-to-digital converters. Each device exhibits true 12-bit linearity and temperature drift performance1 as well as 11.5 bit or better ac performance2. The AD9221/AD9223/AD9220 share the same interface options, package, and pinout. Thus, the product family provides an upward or downward component selection path based on performance, sample rate and power. The devices differ with respect to their specified sampling rate and power consumption which is reflected in their dynamic performance over frequency.
The AD9221/AD9223/AD9220 combine a low cost, high speed single-CMOS process and a novel architecture to achieve the resolution and speed of existing hybrid and monolithic implementations at a fraction of the power consumption and cost. Each device 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 devices use a multistage differential pipelined architecture with digital output error correction logic to provide 12-bit accuracy at the specified data rates and to guarantee no missing codes over the full operating temperature range.The input of the AD9221/AD9223/AD9220 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 sample-interfaces of varying input spans. The sample-and-hold (SHA) amplifier 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 AD9221/AD9223/AD9220 is well suited for communication systems employing IF Down Conversion since the SHA in the differential input mode can achieve excellent dynamic performance far beyond its specified Nyquist frequency2.A single clock input is used to control all internal conversion The digital output data is presented in straight binary format. An out-of-range (OTR) signal indicates an flow condition which can be used with the most significant bit to determine low or high overflow.
NOTES:
1 Excluding internal voltage reference
2 Depends on the analog input configuration
AD9221 特点
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AD9221 技术指标
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AD9221 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 |
|---|---|---|---|---|---|---|
| AD9221AR 产品状态: 量产 | 28 ld SOIC - Wide | 28 | 工业 | Tube, 27 | $ 11.43 | $ 9.72 |
| AD9221AR-REEL 产品状态: 量产 | 28 ld SOIC - Wide | 28 | 工业 | Reel, 1000 | - | $ 9.72 |
| AD9221ARS 产品状态: 量产 | 28 ld SSOP | 28 | 工业 | Tube, 47 | $ 10.00 | $ 8.51 |
| AD9221ARS-REEL 产品状态: 量产 | 28 ld SSOP | 28 | 工业 | Reel, 1500 | - | $ 8.51 |
| AD9221ARSZ 产品状态: 量产 | 28 ld SSOP | 28 | 工业 | Tube, 47 | $ 9.11 | $ 7.74 |
| AD9221ARSZ-REEL 产品状态: 量产 | 28 ld SSOP | 28 | 商业 | Reel, 1500 | - | $ 7.74 |
| AD9221ARZ 产品状态: 量产 | 28 ld SOIC - Wide | 28 | 工业 | Tube, 27 | $ 10.41 | $ 8.86 |
| AD9221ARZ-REEL 产品状态: 量产 | 28 ld SOIC - Wide | 28 | 工业 | Reel, 1000 | - | $ 8.86 |
