ADI AD4010高速18位SAR ADC解决方案

ADI公司的AD4002/AD4006/AD4010是低噪音低功耗高速18位精密逐次逼近(SAR)模数转换器(ADC),AD4002,AD4006和AD4010分别提供2 MSPS, 1 MSPS和500 kSPS吞吐量,INL为 ±3.2 LSB,不丢失码的分辨率保证为18位,工作电压1.8V,逻辑接口1.71V-5.5V,工作温度−40℃ 到+125℃ ,SPI-/QSPI-/MICROWIRE-/DSP兼容串行接口,主要用在自动测试,机器自动化,医疗电子,电池能源的设备,精密数据采集系统.本文介绍了AD4002/AD4006/AD4010主要特性,功能框图和应用电路,以及评估板VAL-AD400xFMCZ主要特性,电路图,材料清单和PCB设计图.
The AD4002/AD4006/AD4010 are low noise, low power, high speed, 18-bit, precision successive approximation register (SAR) analog-to-digital converters (ADCs). The AD4002, AD4006, and AD4010 offer 2 MSPS, 1 MSPS, and 500 kSPS throughputs, respectively. They incorporate ease of use features that reduce signal chain power consumption, reduce signal chain complexity, and enable higher channel density. The high-Z mode, coupled with a long acquisition phase, eliminates the need for a dedicated high power, high speed ADC driver, thus broadening the range of low power precision amplifiers that can drive these ADCs directly while still achieving optimum performance. The input span compression feature enables the ADC driver amplifier and the ADC to operate off common supply rails without the need for a negative supply while preserving the full ADC code range. The low serial peripheral interface (SPI) clock rate requirement reduces the digital input/output power consumption, broadens processor options, and simplifies the task of sending data across digital isolation.
Operating from a 1.8 V supply, the AD4002/AD4006/AD4010 sample an analog input (IN+) from 0 V to VREF with respect to a ground sense (IN−) with VREF ranging from 2.4 V to 5.1 V. The AD4002 consumes only 14 mW at 2 MSPS with a minimum SCK rate of 75 MHz in turbo mode; the AD4006 consumes only 7 mW at 1 MSPS; and the AD4010 consumes only 3.5 mW at 500 kSPS. The AD4002/AD4006/AD4010 all achieve ±3.2 LSB integral nonlinearity error (INL) ...