EVAL-AD7265EDZ

• Product Introduction

EVAL-AD7265EDZ differential/single-ended input, dual-core 1 MSPS, 12-bit, 3-channel SAR A/D converter 

The AD7265 is a 12-bit dual-core, high-speed, low-power successive approximation analog-to-digital converter (ADC) that operates from a single 2.7 V to 5.25 V supply and delivers up to 1 MSPS. The device has two ADCs built in, both previously equipped with a 3-channel multiplexer and a low-noise, wide-bandwidth sample-and-hold amplifier capable of handling input frequencies above 30 MHz.

Both the conversion process and the data acquisition process use standard control inputs and can be easily interfaced with a microprocessor or DSP. The input signal is sampled at the falling edge of the CS, and the conversion is initiated here at the same time. The conversion time depends on the SCLK frequency. The AD7265 features advanced design techniques that enable extremely low power consumption at high throughput. It operates at 5 V and delivers 1 MSPS while dissipating from a maximum power consumption of only 4 mA. In normal operating mode, the device also features flexible power/throughput management thanks to ultra-low quiescent current consumption levels.

The analog input range is selectable from 0 V to VREF (or 2 × VREF) and can be encoded with standard binary or binary complement outputs. The AD7265 has an on-chip reference voltage of 2.5 V, which can be exceeded when an external reference voltage is used, with an external reference range of 100 mV to VDD. The AD7265 is available in both 32-pin LFCSP and 32-pin TQFP packages

Product Focus

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V_REF输入范围和2 × V_REF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。