link to page 21 link to page 11 link to page 20 link to page 5 link to page 5 link to page 5 link to page 5 AD7923Data SheetParameterB Version1UnitTest Conditions/Comments LOGIC OUTPUTS Output High Voltage, VOH VDRIVE – 0.2 V min ISOURCE = 200 µA, AVDD = 2.7 V to 5.25 V Output Low Voltage, VOL 0.4 V max ISINK = 200 µA Floating-State Leakage Current ±1 µA max Floating-State Output Capacitance3 10 pF max Output Coding Twos Complement Coding bit set to 0 Straight (Natural) Coding bit set to 1 Binary CONVERSION RATE Conversion Time Track-and-Hold Acquisition Time 800 ns max 16 SCLK cycles with SCLK at 20 MHz 300 ns max Sinewave input 300 ns max Full-scale step Input Throughput Rate 200 kSPS max See Serial Interface section POWER REQUIREMENTS AVDD 2.7/5.25 V min/max VDRIVE 2.7/5.25 V min/max I 4 DD Digital I/Ps = 0 V or VDRIVE During Conversion 2.7 mA max AVDD = 4.75 V to 5.25 V, fSCLK = 20 MHz 2.0 mA max AVDD = 2.7 V to 3.6 V, fSCLK = 20 MHz Normal Mode (Static) 600 µA typ AVDD = 2.7 V to 5.25 V, SCLK on or off Normal Mode (Operational) fSAMPLE = 200 kSPS 1.5 mA max AVDD = 4.75 V to 5.25 V, fSCLK = 20 MHz 1.2 mA max AVDD = 2.7 V to 3.6 V, fSCLK = 20 MHz Using Auto Shutdown Mode fSAMPLE = 200 kSPS 900 µA typ AVDD = 4.75 V to 5.25 V, fSAMPLE = 200 kSPS 650 µA typ AVDD = 2.7 V to 3.6 V, fSAMPLE = 200 kSPS Auto Shutdown (Static) 0.5 µA max SCLK on or off (20 nA typ) Full Shutdown Mode 0.5 µA max SCLK on or off (20 nA typ) Power Dissipation4 Normal Mode (Operational) fSAMPLE = 200 kSPS 7.5 mW max AVDD = 5 V, fSCLK = 20 MHz 3.6 mW max AVDD = 3 V, fSCLK = 20 MHz Auto Shutdown (Static) 2.5 µW max AVDD = 5 V 1.5 µW max AVDD = 3 V Full Shutdown Mode 2.5 µW max AVDD = 5 V 1.5 µW max AVDD = 3 V 1 Temperature range: B Version: −40°C to +125°C. 2 See Terminology section. 3 Sample tested @ 25°C to ensure compliance. 4 See Power vs. Throughput Rate section. Rev. D | Page 4 of 24 Document Outline Specifications Timing Specifications Absolute Maximum Ratings ESD Caution Pin Configuration and Function Description Typical Performance Characteristics Terminology Control Register Descriptions Sequencer Operation Theory of Operation Circuit Information Converter Operation Analog Input ADC Transfer Function Handling Bipolar Input Signals Typical Connection Diagram Analog Input Selection Digital Inputs VDRIVE Reference Modes of Operation Normal Mode (PM1 = PM0 = 1) Full Shutdown (PM1 = 1, PM0 = 0) Auto Shutdown (PM1 = 0, PM0 = 1) Powering Up the AD7923 Power vs. Throughput Rate Serial Interface Writing Between Conversions Microprocessor Interfacing AD7923-to-TMS320C541 AD7923-to-ADSP-21xx AD7923-to-DSP563xx Application Hints Grounding and Layout Outline Dimensions Ordering Guide Automotive Products
