Datasheet AD7734 (Analog Devices) - 5

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AD7734 Data Sheet Parameter Min Typ Max Unit Test Conditions/Comments
BIAS0 to 3, BIASHI Pin Impedance1, 8 12.5 15.5 kΩ Input Resistor Matching 0.2 % Input Resistor Temp. Coefficient –30 ppm/°C REFERENCE INPUTS REFIN(+) to REFIN(–) Voltage1, 9 2.475 2.5 2.525 V NOREF Trigger Voltage 0.5 V NOREF Bit in Channel Status Register REFIN(+), REFIN(–) Common-Mode Voltage1 0 AVDD V Reference Input DC Current10 400 µA SYSTEM CALIBRATION1, 11 Full-Scale Calibration Limit +1.05 × FS V Zero-Scale Calibration Limit –1.05 × FS V Input Span 0.8 × FS 2.1 × FS V LOGIC INPUTS Input Current ±1 µA Input Current CS ±10 µA CS = DVDD –40 µA CS = DGND, Internal Pull-Up Resistor Input Capacitance 5 pF V 1 T+ 1.4 2 V DVDD = 5 V V 1 T– 0.8 1.4 V DVDD = 5 V V 1 T+ – VT– 0.3 0.85 V DVDD = 5 V V 1 T+ 0.95 2 V DVDD = 3 V V 1 T– 0.4 1.1 V DVDD = 3 V V 1 T+ – VT– 0.3 0.85 V DVDD = 3 V MCLK IN ONLY Input Current ±10 µA Input Capacitance 5 pF VINL Input Low Voltage 0.8 V DVDD = 5 V VINH Input High Voltage 3.5 V DVDD = 5 V VINL Input Low Voltage 0.4 V DVDD = 3 V VINH Input High Voltage 2.5 V DVDD = 3 V LOGIC OUTPUTS12 VOL Output Low Voltage 0.4 V ISINK = 800 µA, DVDD = 5 V VOH Output High Voltage 4.0 V ISOURCE = 200 µA, DVDD = 5 V VOL Output Low Voltage 0.4 V ISINK = 100 µA, DVDD = 3 V VOH Output High Voltage DVDD – 0.6 V ISOURCE = 100 µA, DVDD = 3 V Floating State Leakage Current ±1 µA Floating State Leakage Capacitance 3 pF P0, P1 INPUTS/OUTPUTS Levels Referenced to Analog Supplies Input Current ±10 µA VINL Input Low Voltage 0.8 V AVDD = 5 V VINH Input High Voltage 3.5 V AVDD = 5 V VOL Output Low Voltage 0.4 V ISINK = 7 mA, See Absolute Maximum Ratings Section VOH Output High Voltage 4.0 V ISOURCE = 200 µA, AVDD = 5 V Rev. B | Page 4 of 32 Document Outline FEATURES APPLICATIONS FUNCTIONAL BLOCK DIAGRAM GENERAL DESCRIPTION TABLE OF CONTENTS REVISION HISTORY SPECIFICATIONS TIMING SPECIFICATIONS Timing Diagrams ABSOLUTE MAXIMUM RATINGS ESD CAUTION TYPICAL PERFORMANCE CHARACTERISTICS OUTPUT NOISE AND RESOLUTION SPECIFICATION CHOPPING ENABLED CHOPPING DISABLED PIN CONFIGURATION AND FUNCTION DESCRIPTIONS REGISTER DESCRIPTION REGISTER ACCESS COMMUNICATIONS REGISTER I/O PORT REGISTER REVISION REGISTER TEST REGISTER ADC STATUS REGISTER CHECKSUM REGISTER ADC ZERO-SCALE CALIBRATION REGISTER ADC FULL-SCALE REGISTER CHANNEL DATA REGISTERS CHANNEL ZERO-SCALE CALIBRATION REGISTERS CHANNEL FULL-SCALE CALIBRATION REGISTERS CHANNEL STATUS REGISTERS CHANNEL SETUP REGISTERS CHANNEL CONVERSION TIME REGISTERS MODE REGISTER DIGITAL INTERFACE DESCRIPTION HARDWARE RESET ACCESS THE AD7734 REGISTERS SINGLE CONVERSION AND READING DATA DUMP MODE CONTINUOUS CONVERSION MODE CONTINUOUS READ (CONTINUOUS CONVERSION) MODE CIRCUIT DESCRIPTION ANALOG FRONT END ANALOG INPUT’S EXTENDED VOLTAGE RANGE CHOPPING MULTIPLEXER, CONVERSION, AND DATA OUTPUT TIMING Σ-Δ ADC FREQUENCY RESPONSE VOLTAGE REFERENCE INPUTS REFERENCE DETECT I/O PORT CALIBRATION ADC ZERO-SCALE SELF-CALIBRATION PER CHANNEL SYSTEM CALIBRATION OUTLINE DIMENSIONS ORDERING GUIDE