AD7265BCPZ-REEL:  差分/单端输入、双核1 MSPS、12位、3通道SAR A/D转换器

AD7265 是一款12位双核高速、低功耗的逐次逼近型模数转换器（ADC）,工作电压为2.7 V至5.25 V单电源,最高呑吐量可达1 MSPS。这款器件内置两个ADC,两者之前均配有一个3通道多路复用器和一个能够处理30 MHz以上输入频率的低噪声、宽带宽采样保持放大器。AD7265转换过程和数据采集过程均采用标准控制输入,可与微处理器或DSP轻松接口。输入信号在CS的下降沿进行采样,而转换同时在此处启动。转换时间取决于SCLK频率。AD7265采用先进的设计技术,可在高呑吐量的情况下实现极低的功耗。其工作电压为5 V,呑吐量达1 MSPS,而最大功耗仅为4 mA。采用正常运行模式时,该器件还具有灵活的功耗/呑吐量管理能力,这要归功于超低的静态电流消耗水平。

AD7265 模拟输入范围可在0 V至VREF（或2 × VREF）之间进行选择,可采用标准二进制或二进制补码输出编码。AD7265拥有2.5 V的片内参考电压,需用外部参考电压时,可超过此值,外部参考范围为100 mV至VDD。AD7265提供32引脚LFCSP和32引脚TQFP两种封装。

The AD7265* is a dual, 12-bit, high speed, low power, successive approximation ADC that operates from a single 2.7 V to 5.25 V power supply and features throughput rates of up to 1 MSPS. The device contains two ADCs, each preceded by a 3-channel multiplexer, and a low noise, wide bandwidth track-and-hold amplifier that can handle input frequencies in excess of 30 MHz.

The conversion process and data acquisition use standard control inputs allowing easy interfacing to microprocessors or DSPs. The input signal is sampled on the falling edge of CS; conversion is also initiated at this point. The conversion time is determined by the SCLK frequency. The AD7265 uses advanced design techniques to achieve very low power dissipation at high throughput rates. With 5 V supplies and a 1 MSPS throughput rate, the part consumes 4 mA maximum. The part also offers flexible power/throughput rate management when operating in normal mode, because the quiescent current consumption is so low.

The analog input range for the part can be selected to be a 0 V to VREF(or 2 × VREF) range, with either straight binary or twos complement output coding. The AD7265 has an on-chip 2.5 V reference that can be overdriven when an external reference is preferred. This external reference range is 100 mV to VDD. The AD7265 is available in 32-lead LFCSP and 32-lead TQFP.

产品聚焦
  1. 具备两个完整的ADC功能,可实现两个通道同时采样和转换。通过编程,每个ADC均可设置为三路全/伪差分对或六路单端输入。两个通道的转换结果可通过独立的数据线同时获得,如果只有一个串行端口可用,则转换结果可通过一条数据线先后获得。
  2. 高呑吐量、低功耗。AD7265拥有1 MSPS的呑吐量,工作电压为3 V时,最大功耗仅有9 mW。
  3. AD7265同时提供标准0 V至VREF输入范围和2 × VREF输入范围。
  4. 无流水线延迟。该器件采用两个标准逐次逼近型ADC,通过CS输入和一次性转换控制可实现对采样时间的精确控制。
产品焦点 Product Highlights
  1. Two Complete ADC Functions Allow Simultaneous Sampling and Conversion of Two Channels. Each ADC has three fully/pseudo differential pairs, or six single-ended channels, as programmed. The conversion result of both channels is simultaneously available on separate data lines, or in succession on one data line if only one serial port is available.
  2. High Throughput with Low Power Consumption. The AD7265 offers a 1 MSPS throughput rate with 9 mW maximum power dissipation when operating at 3 V.
  3. The AD7265 offers both a standard 0 V to VREF input range and a 2 × V REF input range.
  4. No Pipeline Delay. The part features two standard successive approximation ADCs with accurate control of the sampling instant via a CS input and once off conversion control.
AD7265BCPZ-REEL 特点
AD7265BCPZ-REEL 功能框图

AD7265 芯片订购指南
产品型号 产品状态 封装 引脚 温度范围
AD7265BCPZ 量产 32 ld LFCSP (5x5mm CP-32-2) 32 工业
AD7265BCPZ-REEL 量产 32 ld LFCSP (5x5mm CP-32-2) 32 工业
AD7265BCPZ-REEL7 量产 32 ld LFCSP (5x5mm CP-32-2) 32 工业
AD7265BSUZ 量产 32 ld TQFP (7x7x1.0mm) 32 工业
AD7265BSUZ-REEL 量产 32 ld TQFP (7x7x1.0mm) 32 工业
AD7265BSUZ-REEL7 量产 32 ld TQFP (7x7x1.0mm) 32 工业
EVAL-AD7265EDZ 量产 评估板 - 待定
AD7265BCPZ-REEL 应用技术支持与电子电路设计开发资源下载
  1. AD7265 数据手册DataSheet下载 . pdf
  2. Analog Devices, Inc.ADI 美国模拟器件公司产品订购手册 .pdf
  3. ADC模数转换器选型指南 . pdf
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