Datasheet AD7904, AD7914, AD7924 (Analog Devices) - 4

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AD7904/AD7914/AD7924 Data Sheet Parameter B Version1 Unit Test 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 Straight (natural) binary CODING bit set to 1 Twos complement CODING bit set to 0 CONVERSION RATE Conversion Time 800 ns max 16 SCLK cycles with SCLK at 20 MHz Track-and-Hold Acquisition Time2 300 ns max Sine wave input 300 ns max Full-scale step input Throughput Rate 1 MSPS max See the Serial Interface section POWER REQUIREMENTS VDD 2.7/5.25 V min/V max VDRIVE 2.7/5.25 V min/V max I 4 DD Digital inputs = 0 V or VDRIVE Normal Mode (Static) 600 μA typ AVDD = 2.7 V to 5.25 V, SCLK on or off Normal Mode (Operational) 2.7 mA max AVDD = 4.75 V to 5.25 V, fSCLK = 20 MHz 2 mA max AVDD = 2.7 V to 3.6 V, fSCLK = 20 MHz Auto Shutdown Mode 960 μA typ fSAMPLE = 250 kSPS 0.5 μA max Static Full Shutdown Mode 0.5 μA max SCLK on or off (20 nA typ) Power Dissipation4 Normal Mode (Operational) 13.5 mW max AVDD = 5 V, fSCLK = 20 MHz 6 mW max AVDD = 3 V, fSCLK = 20 MHz Auto Shutdown Mode (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 for B versions: −40°C to +85°C. 2 See the Terminology section. 3 Sample tested @ 25°C to ensure compliance. 4 See the Power vs. Throughput Rate section. Rev. C | Page 4 of 32 Document Outline Features Functional Block Diagram General Description Product Highlights Revision History Specifications AD7904 Specifications AD7914 Specifications AD7924 Specifications Timing Specifications Absolute Maximum Ratings ESD Caution Pin Configuration and Function Descriptions Typical Performance Characteristics Terminology Control Register Sequencer 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 Mode (PM1 = 1, PM0 = 0) Auto Shutdown Mode (PM1 = 0, PM0 = 1) Powering Up the AD7904/AD7914/AD7924 Power vs. Throughput Rate Serial Interface Applications Information Microprocessor Interfacing AD7904/AD7914/AD7924 to TMS320C541 AD7904/AD7914/AD7924 to ADSP-218x AD7904/AD7914/AD7924 to DSP563xx Grounding and Layout Outline Dimensions Ordering Guide Automotive Products