Datasheet AD7641 (Analog Devices) - 8

link to page 8 link to page 8 link to page 8 link to page 8 link to page 18 link to page 19
AD7641 ABSOLUTE MAXIMUM RATINGS Table 5.
Stresses above those listed under Absolute Maximum Ratings
Parameter Rating
may cause permanent damage to the device. This is a stress Analog Inputs/Outputs rating only; functional operation of the device at these or any IN+1, IN−, REF, REFBUFIN, TEMP, AVDD + 0.3 V to other conditions above those indicated in the operational INGND, REFGND to AGND AGND − 0.3 V section of this specification is not implied. Exposure to absolute Ground Voltage Differences maximum rating conditions for extended periods may affect AGND, DGND, OGND ±0.3 V device reliability. Supply Voltages AVDD, DVDD −0.3 V to +2.7 V OVDD −0.3 V to +3.8 V AVDD to DVDD ±2.8 V 1 See Analog Inputs section. 2 See Voltage Reference Input section. AVDD, DVDD to OVDD −3.8 V to +2.8 V 3 Specification is for the device in free air: Digital Inputs −0.3 V to +5.5 V 48-Lead LQFP; θJA = 91°C/W, θJC = 30°C/W. 4 PDREF, PDBUF2 ±20 mA Specification is for the device in free air: 48-Lead LFCSP; θJA = 26°C/W. Internal Power Dissipation3 700 mW Internal Power Dissipation4 2.5 W Junction Temperature 125°C Storage Temperature Range –65°C to +125°C
ESD CAUTION
ESD (electrostatic discharge) sensitive device. Electrostatic charges as high as 4000 V readily accumulate on the human body and test equipment and can discharge without detection. Although this product features proprietary ESD protection circuitry, permanent damage may occur on devices subjected to high energy electrostatic discharges. Therefore, proper ESD precautions are recommended to avoid performance degradation or loss of functionality. Rev. 0 | Page 7 of 28 Document Outline FEATURES APPLICATIONS GENERAL DESCRIPTION FUNCTIONAL BLOCK DIAGRAM PRODUCT HIGHLIGHTS TABLE OF CONTENTS REVISION HISTORY SPECIFICATIONS TIMING SPECIFICATIONS ABSOLUTE MAXIMUM RATINGS ESD CAUTION PIN CONFIGURATION AND FUNCTION DESCRIPTIONS TERMINOLOGY TYPICAL PERFORMANCE CHARACTERISTICS APPPLICATIONS INFORMATION CIRCUIT INFORMATION CONVERTER OPERATION MODES OF OPERATION TRANSFER FUNCTIONS TYPICAL CONNECTION DIAGRAM ANALOG INPUTS MULTIPLEXED INPUTS DRIVER AMPLIFIER CHOICE Single-to-Differential Driver VOLTAGE REFERENCE INPUT Internal Reference (PDBUF = Low, PDREF = Low) External 1.2 V Reference and Internal Buffer (PDBUF = Low, PDREF = High) External 2.5 V Reference (PDBUF = High, PDREF = High) Reference Decoupling Temperature Sensor POWER SUPPLY Power Sequencing Power-Up CONVERSION CONTROL INTERFACES DIGITAL INTERFACE RESET PARALLEL INTERFACE Master Parallel Interface Slave Parallel Interface 16-Bit and 8-Bit Interface (Master or Slave) SERIAL INTERFACE MASTER SERIAL INTERFACE Internal Clock SLAVE SERIAL INTERFACE External Clock External Discontinuous Clock Data Read After Conversion External Clock Data Read During Previous Conversion MICROPROCESSOR INTERFACING SPI Interface (ADSP-219x) APPLICATION HINTS LAYOUT EVALUATING THE AD7641 PERFORMANCE OUTLINE DIMENSIONS ORDERING GUIDE