AD7495:1 MSPS、12位模数转换器,采用MSOP-8或SOIC-8封装

The AD7475/AD7495 are 12-bit, high speed, low power, successive-approximation ADCs that operate from a single 2.7 V to 5.25 V power supply with throughput rates up to 1 MSPS. They contain a low noise, wide bandwidth track-and-hold amplifier that can handle input frequencies above 1 MHz.

The conversion process and data acquisition are controlled using CS and the serial clock, allowing the devices to interface with microprocessors or DSPs. The input signal is sampled on the falling edge of CS and conversion is initiated at this point. The conversion time is determined by the SCLK frequency. There are no pipeline delays associated with the part.The AD7475/AD7495 use advanced design techniques to achieve very low power dissipation at high throughput rates. With 3 V supplies and a 1 MSPS throughput rate, the AD7475 consumes just 1.5 mA, while the AD7495 consumes 2 mA. With 5 V supplies and 1 MSPS, the current consumption is 2.1 mA for the AD7475 and 2.6 mA for the AD7495.The analog input range for the parts is 0 V to REF IN. The 2.5 V reference for the AD7475 is applied externally to the REF IN pin, while the AD7495 has an on-board 2.5 V reference.

AD7475/AD7495*是12位高速、低功耗逐次逼近型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。这些器件内置一个低噪声、宽带宽采样-保持放大器,可处理1 MHz以上的输入频率。

转换过程和数据采集过程通过CS和串行时钟进行控制,从而为器件与微处理器或DSP接口创造了条件。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。该器件不存在流水线延迟。AD7475/AD7495采用先进的设计技术,可在高吞吐量的情况下实现极低的功耗。采用3 V电源,吞吐量为1 MSPS时,AD7475的功耗仅为1.5 mA,而AD7495的功耗为2 mA。采用5 V电源,吞吐量为1 MSPS时,AD7475和AD7495的功耗分别为2.1 mA和2.6 mA。该器件的模拟输入范围是0 V至REF IN。AD7475的2.5 V外部基准电压通过REF IN引脚输入,而AD7495则采用2.5 V的片内基准电压。

AD7495 特点
AD7495 技术指标
AD7495 亮点
  1. The AD7475 offers 1 MSPS throughput rates with 4.5 mW power consumption.
  2. Single-supply operation with VDRIVE function. The AD7475/AD7495 operate from a single 2.7 V to 5.25 V supply. The VDRIVE function allows the serial interface to connect directly to either 3 V or 5 V processor systems independent of VDD.
  3. Flexible power/serial clock speed management. The con-version rate is determined by the serial clock, allowing the conversion time to be reduced through the serial clock speed increase. The parts also feature shutdown modes to maximize power efficiency at lower throughput rates. This allows the average power consumption to be reduced while not converting. Power consumption is 1 μA when in full shutdown.
  4. No pipeline delay. The parts feature a standard successive approximation ADC with accurate control of the sampling instant via a CS input and once-off conversion control.
  5. AD7475提供1 MSPS的吞吐量,功耗为4.5 mW。
  6. 利用VDRIVE功能实现单电源供电。AD7475/AD7495采用2.7 V至5.25 V单电源供电,利用VDRIVE功能,串行接口可直接连至独立于VDD的3 V或5 V处理器系统。
  7. 灵活的功耗/串行时钟速度管理。转换速率由串行时钟确定,通过提高串行时钟速度可缩短转换时间。这些器件还提供关断模式,可在较低吞吐量下实现最高功效,这样可以降低不转换时的平均功耗。完全关断时的功耗为1 µA。
  8. 无流水线延迟。这些器件采用标准逐次逼近型ADC,通过/CS输入与一次性转换控制可实现对采样时间的精确控制。
AD7495 应用领域
AD7495 功能框图

AD7495 芯片订购指南
产品型号 产品状态 封装 引脚 温度范围
AD7495AR 量产 8 ld SOIC 8 工业
AD7495AR-REEL 量产 8 ld SOIC 8 商业
AD7495AR-REEL7 量产 8 ld SOIC 8 商业
AD7495ARM 量产 8 ld MSOP 8 工业
AD7495ARMZ 量产 8 ld MSOP 8 工业
AD7495ARMZ-REEL 量产 8 ld MSOP 8 工业
AD7495ARMZ-REEL7 量产 8 ld MSOP 8 工业
AD7495ARZ 量产 8 ld SOIC 8 工业
AD7495ARZ-REEL7 量产 8 ld SOIC 8 商业
AD7495BR 量产 8 ld SOIC 8 工业
AD7495BR-REEL 量产 8 ld SOIC 8 商业
AD7495BRM 量产 8 ld MSOP 8 工业
AD7495BRM-REEL 量产 8 ld MSOP 8 工业
AD7495BRMZ 量产 8 ld MSOP 8 工业
AD7495BRZ 量产 8 ld SOIC 8 工业
AD7495BRZ-REEL 量产 8 ld SOIC 8 商业
AD7495BRZ-REEL7 量产 8 ld SOIC 8 商业
EVAL-AD7495CB 量产 评估板 - 待定
AD7495 应用技术支持与电子电路设计开发资源下载
  1. AD7495 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