Datasheet AD7485 (Analog Devices) - 3

AD7485–SPECIFICATIONS1 (VDD = 5 V 5%, AGND = DGND = 0 V, VREF = External, fSAMPLE = 1 MSPS; all specifica- tions TMIN to TMAX and valid for VDRIVE = 2.7 V to 5.25 V, unless otherwise noted.) Parameter Specification Unit Test Conditions/Comments
DYNAMIC PERFORMANCE2, 3 fIN = 500 kHz Sine Wave Signal to Noise + Distortion (SINAD)4 76.5 dB min 78 dB typ 77 dB typ Internal Reference Total Harmonic Distortion (THD)4 –90 dB max –95 dB typ –92 dB typ Internal Reference Peak Harmonic or Spurious Noise (SFDR)4 –88 dB max Intermodulation Distortion (IMD)4 Second-Order Terms –96 dB typ fIN1 = 95.053 kHz, fIN2 = 105.329 kHz Third-Order Terms –94 dB typ Aperture Delay 10 ns typ Full Power Bandwidth 40 MHz typ @ 3 dB 3.5 MHz typ @ 0.1 dB DC ACCURACY Resolution 14 Bits Integral Nonlinearity4 ±1 LSB max ±0.5 LSB typ Differential Nonlinearity4 ±0.75 LSB max Guaranteed No Missed Codes to 14 Bits ±0.25 LSB typ Offset Error4 ±6 LSB max 0.036 %FSR max Gain Error4 ±6 LSB max 0.036 %FSR max ANALOG INPUT Input Voltage 0 V min 2.5 V max DC Leakage Current ±1 µA max Input Capacitance5 35 pF typ REFERENCE INPUT/OUTPUT VREFIN Input Voltage 2.5 V ±1% for Specified Performance VREFIN Input DC Leakage Current ±1 µA max VREFIN Input Capacitance5 25 pF typ VREFIN Input Current6 220 A typ External Reference VREFOUT Output Voltage 2.5 V typ VREFOUT Error @ 25°C ±50 mV typ VREFOUT Error TMIN to TMAX ±100 mV max VREFOUT Output Impedance 1 Ω typ LOGIC INPUTS Input High Voltage, VINH VDRIVE –1 V min Input Low Voltage, VINL 0.4 V max Input Current, IIN ±1 µA max Input Capacitance, C 5 IN 10 pF typ LOGIC OUTPUTS Output High Voltage, V 7 OH 0.7 × VDRIVE V min Output Low Voltage, V 7 OL 0.3 × VDRIVE V max Floating-State Leakage Current ±10 µA max Floating-State Output Capacitance5 10 pF max Output Coding Straight (Natural) Binary CONVERSION RATE Conversion Time 24 MCLKs Track/Hold Acquisition Time 100 ns max Sine Wave Input 70 ns max Full-Scale Step Input Throughput Rate 1 MSPS max –2– REV. A Document Outline FEATURES GENERAL DESCRIPTION FUNCTIONAL BLOCK DIAGRAM SPECIFICATIONS ABSOLUTE MAXIMUM RATINGS ORDERING GUIDE PIN CONFIGURATION PIN FUNCTION DESCRIPTIONS TERMINOLOGY Integral Nonlinearity Differential Nonlinearity Offset Error Gain Error Track/Hold Acquisition Time Signal to (Noise + Distortion) Ratio Total Harmonic Distortion Peak Harmonic or Spurious Noise Intermodulation Distortion Typical Performance Characteristics CIRCUIT DESCRIPTION CONVERTER OPERATION ADC TRANSFER FUNCTION POWER SAVING SERIAL INTERFACE Driving the CONVST Pin Board Layout and Grounding OUTLINE DIMENSIONS