Datasheet AD7933, AD7934 (Analog Devices) - 4

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AD7933/AD7934 Parameter Value1 Unit Test Conditions/Comments
REFERENCE INPUT/OUTPUT VREF Input Voltage5 2.5 V ±1% specified performance DC Leakage Current4 ±1 μA max VREFOUT Output Voltage 2.5 V ±0.2% max @ 25°C VREFOUT Temperature Coefficient 25 ppm/°C max 5 ppm/°C typ VREF Noise 10 μV typ 0.1 Hz to 10 Hz bandwidth 130 μV typ 0.1 Hz to 1 MHz bandwidth VREF Output Impedance 10 Ω typ VREF Input Capacitance 15 pF typ When in track 25 pF typ When in hold LOGIC INPUTS Input High Voltage, VINH 2.4 V min Input Low Voltage, VINL 0.8 V max Input Current, IIN ±5 μA max Typically 10 nA, VIN = 0 V or VDRIVE Input Capacitance, C 4 IN 10 pF max LOGIC OUTPUTS Output High Voltage, VOH 2.4 V min ISOURCE = 200 μA Output Low Voltage, VOL 0.4 V max ISINK = 200 μA Floating-State Leakage Current ±3 μA max Floating-State Output Capacitance4 10 pF max Output Coding Straight (natural) binary CODING bit = 0 Twos complement CODING bit = 1 CONVERSION RATE Conversion Time t2 + 13 tCLK ns Track-and-Hold Acquisition Time 125 ns max Full-scale step input 80 ns typ Sine wave input Throughput Rate 1.5 MSPS max POWER REQUIREMENTS VDD 2.7/5.25 V min/max VDRIVE 2.7/5.25 V min/max I 6 DD Digital inputs = 0 V or VDRIVE Normal Mode (Static) 0.8 mA typ VDD = 2.7 V to 5.25 V, SCLK on or off Normal Mode (Operational) 2.7 mA max VDD = 4.75 V to 5.25 V 2.0 mA max VDD = 2.7 V to 3.6 V Autostandby Mode 0.3 mA typ FSAMPLE = 100 kSPS, VDD = 5 V 160 μA typ Static Full/Autoshutdown Mode (Static) 2 μA max SCLK on or off Power Dissipation Normal Mode (Operational) 13.5 mW max VDD = 5 V 6 mW max VDD = 3 V Autostandby Mode (Static) 800 μW typ VDD = 5 V 480 μW typ VDD = 3 V Full/Autoshutdown Mode 10 μW max VDD = 5 V 6 μW max VDD = 3 V 1 Temperature range is −40°C to +85°C. 2 See Terminology section. 3 VCM is the common-mode voltage. For full common-mode range, see Figure 25 and Figure 26. VIN+ and VIN− must always remain within GND/VDD. 4 Sample tested during initial release to ensure compliance. 5 This device is operational with an external reference in the range of 0.1 V to VDD. See the Reference section for more information. 6 Measured with a midscale dc analog input. Rev. B | Page 4 of 32 Document Outline FEATURES FUNCTIONAL BLOCK DIAGRAM GENERAL DESCRIPTION PRODUCT HIGHLIGHTS TABLE OF CONTENTS REVISION HISTORY SPECIFICATIONS AD7933 SPECIFICATIONS AD7934 SPECIFICATIONS TIMING SPECIFICATIONS ABSOLUTE MAXIMUM RATINGS PIN CONFIGURATION AND FUNCTION DESCRIPTIONS TYPICAL PERFORMANCE CHARACTERISTICS TERMINOLOGY CONTROL REGISTER SEQUENCER OPERATION Writing to the Control Register to Program the Sequencer CIRCUIT INFORMATION CONVERTER OPERATION ADC TRANSFER FUNCTION TYPICAL CONNECTION DIAGRAM ANALOG INPUT STRUCTURE ANALOG INPUTS Single-Ended Mode Differential Mode Driving Differential Inputs Using an Op Amp Pair Pseudo Differential Mode ANALOG INPUT SELECTION Traditional Multichannel Operation (SEQ0 = SEQ1 = 0) Using the Sequencer: Consecutive Sequence (SEQ0 = 1, SEQ1 = 1) REFERENCE Digital Inputs VDRIVE Input PARALLEL INTERFACE Reading Data from the AD7933/AD7934 Writing Data to the AD7933/AD7934 POWER MODES OF OPERATION Normal Mode (PM1 = PM0 = 0) Autoshutdown (PM1 = 0; PM0 = 1) Autostandby (PM1 = 1; PM0 = 0) Full Shutdown Mode (PM1 = 1; PM0 = 1) POWER vs. THROUGHPUT RATE MICROPROCESSOR INTERFACING AD7933/AD7934 to ADSP-21xx Interface AD7933/AD7934 to ADSP-21065L Interface AD7933/AD7934 to TMS32020, TMS320C25, and TMS320C5x Interface AD7933/AD7934 to 80C186 Interface APPLICATION HINTS GROUNDING AND LAYOUT EVALUATING THE AD7933/AD7934 PERFORMANCE OUTLINE DIMENSIONS ORDERING GUIDE