ADS7868

The ADS7866/67/68 are low power, miniature,12/10/8-bitA/D converters each witha unipolar,single-ended input.These devices canoperate from a single1.6V to 3.6V supply with a 200-KSPS throughput for ADS7866.Inaddition,these devices can maintain at leasta 100-KSPS throughput witha supply aslowas 1.2V.

The sampling, conversion,and activation of digital output SDO are initiatedon the falling edge of CS.The serial clock SCLK is used for controlling the conversion rate and shifting data out of the converter. Furthermore, SCLK providesa mechanism to allow digital host processors to synchronize with the con-verter.These converters interface withmicro- processors or DSPsthrougha high-speed SPI compatible serial interface.There are no pipeline delays associated with the ADS7866/67/68.

The minimum conversion time is determined by the frequency of the serial clock input, SCLK,while the maximum frequency of SCLK is determined by the minimum sampling time required to charge the input capacitance to 12/10/8-bit accuracy for the ADS7866/67/68, respectively.The maximum throughput is determined by how often aconversion is initiated when the minimum sampling time is met and the maximum SCLK frequency is used. Each ADS7866/67/68 device automatically powers down after each conver-sion,which allows each device to save power when the throughputis reduced while using the maximum SCLK frequency.

The ADS7866/67/68 converter reference is taken internally from the supply.Hence,the analoginput range for these devices is0V to VDD.

These ADS7866/67/68 devices are available in a6-pin SOT-23 package and are characterized over the industrial40°C to 85°C temperaturerange.