Datasheet AD7321 (Analog Devices) - 6

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Data Sheet AD7321 B Version Parameter
1
Min Typ Max Unit Test Conditions/Comments
ANALOG INPUT Input Voltage Ranges Reference = 2.5 V; see Table 6 (Programmed via Range ±10 V VDD = 10 V min, VSS = −10 V min, VCC = 2.7 V to Register) 5.25 V ±5 V VDD = 5 V min, VSS = −5 V min, VCC = 2.7 V to 5.25 V ±2.5 V VDD = 5 V min, VSS = −5 V min, VCC = 2.7 V to 5.25 V 0 to 10 V VDD = 10 V min, VSS = AGND min, VCC = 2.7 V to 5.25 V Pseudo Differential VIN(−) VDD = 16.5 V, VSS = −16.5 V, VCC = 5 V; see Figure 40 Input Range and Figure 41 ±3.5 V Reference = 2.5 V; range = ±10 V ±6 V Reference = 2.5 V; range = ±5 V ±5 V Reference = 2.5 V; range = ±2.5 V +3/−5 V Reference = 2.5 V; range = 0 V to +10 V DC Leakage Current ±80 nA VIN = VDD or VSS 3 nA Per input channel, VIN = VDD or VSS Input Capacitance3 13.5 pF When in track, ±10 V range 16.5 pF When in track, ±5 V and 0 V to +10 V ranges 21.5 pF When in track, ±2.5 V range 3 pF When in hold, all ranges REFERENCE INPUT/OUTPUT Input Voltage Range 2.5 3 V Input DC Leakage Current ±1 µA Input Capacitance 10 pF Reference Output Voltage 2.5 V Reference Output Voltage ±5 mV Error at 25°C Reference Output Voltage ±10 mV TMIN to TMAX Reference Temperature 25 ppm/°C Coefficient 3 ppm/°C Reference Output 7 Ω Impedance LOGIC INPUTS Input High Voltage, VINH 2.4 V Input Low Voltage, VINL 0.8 V VCC = 4.75 V to 5.25 V 0.4 V VCC = 2.7 to 3.6 V Input Current, IIN ±1 µA VIN = 0 V or VDRIVE Input Capacitance, C 3 IN 10 pF LOGIC OUTPUTS Output High Voltage, VOH VDRIVE − 0.2 V V ISOURCE = 200 µA Output Low Voltage, VOL 0.4 V ISINK = 200 µA Floating-State Leakage ±1 µA Current Floating-State Output 5 pF Capacitance3 Output Coding Straight natural binary Coding bit set to 1 in control register Twos complement Coding bit set to 0 in control register Rev. B | Page 5 of 36 Document Outline Features Functional Block Diagram General Description Product Highlights Table of Contents Revision History Specifications Timing Specifications Absolute Maximum Ratings ESD Caution Pin Configuration and Function Descriptions Typical Performance Characteristics Terminology Theory of Operation Circuit Information Converter Operation Output Coding Transfer Functions Analog Input Structure Track-and-Hold Section Typical Connection Diagram Analog Input Single-Ended Inputs True Differential Mode Pseudo Differential Inputs Driver Amplifier Choice Registers Addressing Registers Control Register Range Register Sequencer Operation Reference VDRIVE Modes of Operation Normal Mode Full Shutdown Mode Autoshutdown Mode Autostandby Mode Power vs. Throughput Rate Serial Interface Microprocessor Interfacing AD7321 to ADSP-21xx AD7321 to ADSP-BF53x Application Hints Layout and Grounding Power Supply Configuration Outline Dimensions Ordering Guide