AD7853L

a FEATURES Specified for VDD of 3 V to 5.5 V Read-Only Operation AD7853–200 kSPS; AD7853L–100 kSPS System and Self-Calibration with Autocalibration on Power-Up Low Power: AD7853: 12 mW (VDD = 3 V) AD7853L: 4.5 mW (VDD = 3 V) Automatic Power Down After Conversion (25 ␮ W) Flexible Serial Interface: 8051/SPI™/QSPI™/␮P Compatible 24-Lead DIP, SOIC and SSOP Packages APPLICATIONS Battery-Powered Systems (Personal Digital Assistants, Medical Instruments, Mobile Communications) Pen Computers Instrumentation and Control Systems High Speed Modems 3 V to 5 V Single Supply, 200 kSPS 12-Bit Sampling ADCs AD7853/AD7853L* FUNCTIONAL BLOCK DIAGRAM AVDD AGND AGND AIN(+) T/H AIN(–) 2.5V REFERENCE COMP REFIN/ REFOUT CREF1 CHARGE REDISTRIBUTION DAC CREF2 CAL CALIBRATION MEMORY AND CONTROLLER SAR + ADC CONTROL BUF AD7853/AD7853L DVDD DGND AMODE CLKIN CONVST BUSY SLEEP SERIAL INTERFACE / CONTROL REGISTER GENERAL DESCRIPTION The AD7853/AD7853L are high speed, low power, 12-bit ADCs that operate from a single 3 V or 5 V power supply, the AD7853 being optimized for speed and the AD7853L for low power. The ADC powers up with a set of default conditions at which time it can be operated as a read-only ADC. The ADC contains self-calibration and system-calibration options to ensure accurate operation over time and temperature and have a number of power-down options for low power applications. The part powers up with a set of default conditions and can operate as a read only ADC. The AD7853 is cap...