Datasheet AD7723 (Analog Devices) - 5

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AD7723 B Version Parameter Test Conditions/Comments Min Typ Max Unit
Low-Pass Decimate by 16 0 kHz to fCLKIN/41.75 ±0.001 dB fCLKIN/33.45 −3 dB fCLKIN/32 −6 dB fCLKIN/25.95 to fCLKIN/2 −90 dB Group Delay 541/2 fCLKIN Settling Time 541/fCLKIN Band-Pass Decimate by 32 fCLKIN/51.90 to fCLKIN/41.75 ±0.001 dB fCLKIN/62.95, fCLKIN/33.34 −3 dB fCLKIN/64, fCLKIN/32 −6 dB 0 kHz to fCLKIN/83.5, fCLKIN/25.95 to fCLKIN/2 −90 dB Group Delay 1293/2 fCLKIN Settling Time 1293/fCLKIN Output Data Rate, FO Decimate by 32 fCLKIN/32 Decimate by 166 fCLKIN/16 ANALOG INPUTS Full-Scale Input Span VIN(+) − VIN(−) Bipolar Mode ±4/5 × VREF2 V Unipolar Mode 0 8/5 × VREF2 V Absolute Input Voltage VIN(+) − VIN(−) AGND AVDD V Input Sampling Capacitance 2 pF Input Sampling Rage, fCLKIN 19.2 MHz CLOCK CLKIN Duty Ratio 45 55 % REFERENCE REF1 Output Resistance 3 kΩ Using Internal Reference REF2 Output Voltage 2.39 2.54 2.69 V REF2 Output Voltage Drift 60 ppm/°C Using External Reference REF2 Input Impedance REF1 = AGND 4 kΩ REF2 External Voltage Range 1.2 2.5 3.15 V STATIC PERFORMANCE Resolution 16 Bits Differential Nonlinearity Guaranteed monotonic ±0.5 ±1 LSB Integral Nonlinearity ±2 LSB DC CMRR 80 dB Offset Error ±20 mV Gain Error5 ±0.5 % FSR LOGIC INPUTS (EXCLUDING CLKIN) VINH, Input High Voltage 2.0 V VINL, Input High Voltage 0.8 V CLOCK INPUT (CLKIN) VINH, Input High Voltage 3.8 V VINL, Input High Voltage 0.4 V ALL LOGIC INPUTS IIN, Input Current VIN = 0 V to DVDD ±10 µA CIN, Input Capacitance 10 pF Rev. C | Page 4 of 32 Document Outline FEATURES GENERAL DESCRIPTION FUNCTIONAL BLOCK DIAGRAM TABLE OF CONTENTS REVISION HISTORY SPECIFICATIONS TIMING SPECIFICATIONS ABSOLUTE MAXIMUM RATINGS ESD CAUTION PIN CONFIGURATION AND FUNCTION DESCRIPTIONS TERMINOLOGY TYPICAL PERFORMANCE CHARACTERISTICS CIRCUIT DESCRIPTION APPLYING THE AD7723 ANALOG INPUT RANGE ANALOG INPUT DRIVING THE ANALOG INPUTS APPLYING THE REFERENCE CLOCK GENERATION SYSTEM SYNCHRONIZATION DATA INTERFACING PARALLEL INTERFACE SERIAL INTERFACE TWO-CHANNEL MULTIPLEXED OPERATION SERIAL INTERFACE TO DSPs AD7723 TO ADSP-21xx INTERFACE AD7723 TO SHARC INTERFACE AD7723 TO DSP56002 INTERFACE AD7723 TO TMS320C5x INTERFACE GROUNDING AND LAYOUT OUTLINE DIMENSIONS ORDERING GUIDE