Texas Instruments
The ADS7809 is part of a family of capacitive redistribution SAR A/D converters that feature a serial output and a tag pin for cascading multiple converters. Other members of this family include the ADS7806 ADS7807 ADS7808 ADS7824 and ADS7825. Note that the even numbered converters are 12-bit converters and the odd numbered converters are 16-bit converters.