link to page 6 link to page 6 AD7357Data SheetAD7357B/AD7357YAD7357WYTest Conditions/ParameterMinTyp MaxMinTyp MaxUnitComments REFERENCE INPUT/OUTPUT VREF Input Voltage Range 2.048 + 0.1 VDD 2.048 + VDD V 0.1 VREF Input Current 0.3 0.45 0.3 0.45 mA When in reference overdrive mode VREF Output Voltage 2.038 2.058 2.038 2.058 V ±2.048 V ± 0.5% maximum at VDD = 2.5 V ± 5% 2.043 2.053 2.043 2.053 V 2.048 V ± 0.25% maximum at VDD = 2.5 V ± 5% and 25°C VREF Temperature Coefficient 6 20 6 20 ppm/°C VREF Long Term Stability 100 100 ppm For 1000 hours VREF Thermal Hysteresis 50 50 ppm VREF Noise 60 60 μV rms VREF Output Impedance 1 1 Ω LOGIC INPUTS Input Voltage High, VINH 0.6 × VDRIVE 0.6 × VDRIVE V Low, VINL 0.3 × VDRIVE 0.3 × V VDRIVE Input Current, IIN ±1 ±1 μA VIN = 0 V or VDRIVE Input Capacitance, CIN 3 3 pF LOGIC OUTPUTS Output Voltage High, VOH VDRIVE − 0.2 VDRIVE − 0.2 V Low, VOL 0.2 0.2 V Floating State Leakage Current ±1 ±1 μA Floating State Output 5.5 5.5 pF Capacitance Output Coding Straight binary Straight binary CONVERSION RATE Conversion Time t2 + 15.5 × t2 + 15.5 × ns tSCLK tSCLK Track-and-Hold Acquisition Time2 33 33 ns Full-scale step input Throughput Rate 4.2 4.2 MSPS POWER REQUIREMENTS VDD 2.25 2.75 2.25 2.75 V Nominal VDD = 2.5 V V 3 DRIVE 2.25 3.6 2.25 3.6 V I 4 TOTAL Digital inputs = 0 V or VDRIVE Normal Mode Operational 14 20 14 20 mA Static 6 7.6 6 7.6 mA SCLK on or off Power-Down Mode Partial 3.5 4.5 3.5 4.5 mA SCLK on or off Full 5 40 5 40 μA SCLK on or off Rev. E | Page 4 of 24 Document Outline FEATURES APPLICATIONS FUNCTIONAL BLOCK DIAGRAM GENERAL DESCRIPTION PRODUCT HIGHLIGHTS REVISION HISTORY SPECIFICATIONS TIMING SPECIFICATIONS ABSOLUTE MAXIMUM RATINGS ESD CAUTION PIN CONFIGURATIONS AND FUNCTION DESCRIPTIONS TYPICAL PERFORMANCE CHARACTERISTICS TERMINOLOGY THEORY OF OPERATION CIRCUIT INFORMATION CONVERTER OPERATION ANALOG INPUT STRUCTURE ANALOG INPUTS DRIVING DIFFERENTIAL INPUTS Differential Amplifier Operational Amplifier Pair VOLTAGE REFERENCE ADC TRANSFER FUNCTION MODES OF OPERATION NORMAL MODE PARTIAL POWER-DOWN MODE FULL POWER-DOWN MODE POWER-UP TIMES POWER vs. THROUGHPUT RATE SERIAL INTERFACE APPLICATION SUGGESTIONS GROUNDING AND LAYOUT EVALUATING THE AD7357 PERFORMANCE OUTLINE DIMENSIONS ORDERING GUIDE AUTOMOTIVE PRODUCTS
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