Datasheet AD7482 (Analog Devices) - 10

AD7482 TYPICAL PERFORMANCE CHARACTERISTICS 0 0.5 fIN = 10.7kHz SNR = 72.97dB 0.4 SNR + D = 72.94dB –20 THD = –91.5dB 0.3 0.2 –40 ) 0.1 B B) (d –60 LS 0 L ( IN –0.1 –80 –0.2 –0.3 –100 –0.4 –120 –0.5 0 200 400 600 800 1000 1200 1400
003
0 1024 2048 3072 4096
006
FREQUENCY (kHz) ADC (Code)
02638-

02638- Figure 3. 64k FFT Plot With 10 kHz Input Tone Figure 6. Typical INL
0 80 fIN = 1.013MHz SNR = 72.58dB SNR + D = 72.57dB –20 THD = –94.0dB –40 75 B) d B) (d –60 INAD ( S –80 70 –100 –120 65 0 200 400 600 800 1000 1200 1400
004
10 100 1000 10000
007
FREQUENCY (kHz) INPUT FREQUENCY (kHz)
02638- 02638- Figure 4. 64k FFT Plot With 1 MHz Input Tone Figure 7. SINAD vs. Input Tone (AD8021 Input Circuit)
0.5 –40 0.4 200Ω 100Ω 0.3 –50 0.2 –60 0.1 B) S B) L d ( 0 51Ω HD ( –70 10Ω DNL T –0.1 –80 –0.2 0Ω –0.3 –90 –0.4 –0.5 –100 0 1024 2048 3072 4096
005
100 1000 10000
008
ADC (Code) INPUT FREQUENCY (kHz)
02638- 02638- Figure 5. Typical DNL Figure 8. THD vs. Input Tone for Different Input Resistances Rev. B | Page 9 of 20 Document Outline Features Functional Block Diagram General Description Revision History Specifications Timing Characteristics Absolute Maximum Ratings ESD Caution Pin Configuration and Function Descriptions Typical Performance Characteristics Terminology Circuit Description Converter Operation Analog Input ADC Transfer Function Power Saving Offset/Overrange Parallel Interface Reading Data from the AD7482 Writing to the AD7482 Driving the CONVST Pin Typical Connection Board Layout and Grounding Outline Dimensions Ordering Guide