Datasheet AD7621 (Analog Devices) - 7

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AD7621 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
ESD CAUTION
AVDD to DVDD ±2.8 V
ESD (electrostatic discharge) sensitive device.
AVDD to OVDD +2.8 V to −3.8 V Charged devices and circuit boards can discharge OVDD to DVDD2 ≤ +0.3 V if DVDD < 2.3 V without detection. Although this product features patented or proprietary protection circuitry, damage may Digital Inputs −0.3 V to +5.5 V occur on devices subjected to high energy ESD. PDREF, PDBUF3 ±20 mA Therefore, proper ESD precautions should be taken to Internal Power Dissipation4 700 mW avoid performance degradation or loss of functionality. Internal Power Dissipation5 2.5 W Junction Temperature 125°C Storage Temperature Range –65°C to +125°C 1 See the Analog Inputs section. 2 See the Power Supply section. 3 See the Voltage Reference Input section. 4 Specification is for the device in free air: 48-Lead LQFP; θJA = 91°C/W, θJC = 30°C/W. 5 Specification is for the device in free air: 48-Lead LFCSP; θJA = 26°C/W. Rev. 0 | Page 7 of 32 Document Outline FEATURES APPLICATIONS GENERAL DESCRIPTION FUNCTIONAL BLOCK DIAGRAM PRODUCT HIGHLIGHTS SPECIFICATIONS TIMING SPECIFICATIONS SERIAL CLOCK TIMING SPECIFICATIONS ABSOLUTE MAXIMUM RATINGS ESD CAUTION PIN CONFIGURATION AND FUNCTION DESCRIPTIONS TERMINOLOGY TYPICAL PERFORMANCE CHARACTERISTICS THEORY OF OPERATION CIRCUIT INFORMATION CONVERTER OPERATION MODES OF OPERATION TRANSFER FUNCTIONS TYPICAL CONNECTION DIAGRAM ANALOG INPUTS DRIVER AMPLIFIER CHOICE Single-to-Differential Driver VOLTAGE REFERENCE INPUT Internal Reference External 1.2 V Reference and Internal Buffer External Reference Reference Decoupling Temperature Sensor POWER SUPPLY Power Sequencing Power-Up POWER DISSIPATION VS. THROUGHPUT CONVERSION CONTROL INTERFACES DIGITAL INTERFACE RESET PARALLEL INTERFACE Master Parallel Interface Slave Parallel Interface 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 LAYOUT EVALUATING THE AD7621 PERFORMANCE OUTLINE DIMENSIONS ORDERING GUIDE