Datasheet AD7485 (Analog Devices) - 8

Typical Performance Characteristics–AD7485 1.0 –40 0.8 –50 0.6 100 0.4 –60 0.2 51 0 –70 THD – dB DNL – LSB –0.2 10 –80 –0.4 0 –0.6 –90 –0.8 –1.0 –100 0 4096 8192 12288 16384 100 1000 10000 ADC CODE INPUT FREQUENCY – kHz
TPC 1. Typical DNL TPC 4. THD vs. Input Tone for Different Input Resistances
1.0 0 100mV p-p SINE WAVE ON SUPPLY PINS 0.8 –10 0.6 –20 0.4 0.2 –30 0 –40 INL – LSB –0.2 PSRR – dB –50 –0.4 –60 –0.6 –0.8 –70 –1.0 –80 0 4096 8192 12288 16384 10 100 1000 ADC CODE FREQUENCY – kHz
TPC 2. Typical INL TPC 5. PSRR without Decoupling
80 0.0004 0 75 –0.0004 V –0.0008 SINAD – dB REFOUT – 70 –0.0012 –0.0016 65 –0.0020 10 100 1000 10000 –55 –25 5 35 65 95 125 INPUT FREQUENCY – kHz TEMPERATURE – C
TPC 3. SINAD vs. Input Tone (AD8021 Input Circuit) TPC 6. Reference Error REV. A –7– 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