Datasheet AD9243 (Analog Devices) - 7

AD9243 (AVDD = +5 V, DVDD = +5 V, DRVDD = +5 V, f Typical Differential AC Characterization Curves/Plots SAMPLE = 3.00 MSPS, TA = +25
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C, Differential Input) 1 90 14.7 –40 0 –15 85 13.8 –50 –30 80 –0.5dBFS 13.0 –45 –60 75 12.2 –20.0dBFS –6.0dBFS –60 70 11.3 –70 –75 4 93 6 7 2 –90 SINAD – dB 65 10.5 THD – dB 8 ENOB – Bits –6.0dBFS –80 5 AMPLITUDE – dB –105 60 –20.0dBFS 9.7 –0.5dBFS –120 –90 55 8.8 –135 50 8.0 –100 –150 100k 1M 10M 20M 100k 1M 10M 20M 0 1.5 FREQUENCY – MHz INPUT FREQUENCY – Hz INPUT FREQUENCY – Hz
Figure 2. SINAD vs. Input Frequency Figure 3. THD vs. Input Frequency Figure 4. Typical FFT, fIN = 500 kHz (Input Span = 5 V, VCM = 2.5 V) (Input Span = 5 V, VCM = 2.5 V) (Input Span = 5 V, VCM = 2.5 V)
1 90 14.7 –40 0 –15 85 13.8 –50 –30 80 13.0 –45 –0.5dBFS –60 75 12.2 –60 –20.0dBFS 70 –6.0dBFS 11.3 –70 –75 9 4 SINAD – dB THD – dB –90 65 10.5 ENOB – Bits 7 –6.0dBFS 2 8 5 6 3 –80 AMPLITUDE – dB –105 60 9.7 –120 –20.0dBFS –0.5dBFS –90 55 8.8 –135 50 8.0 –100 –150 100k 1M 10M 20M 100k 1M 10M 20M 0 1.5 FREQUENCY – MHz INPUT FREQUENCY – Hz INPUT FREQUENCY – Hz
Figure 5. SINAD vs. Input Frequency Figure 6. THD vs. Input Frequency Figure 7. Typical FFT, fIN = 1.50 MHz (Input Span = 2 V, VCM = 2.5 V) (Input Span = 2 V, VCM = 2.5 V) (Input Span = 2 V, VCM = 2.5 V)
–60 110 110 dBFS – 5V 105 –65 100 5V SPAN - dBFS 100 –70 dBFS – 2V 90 95 –75 2V SPAN - dBFS 90 5V SPAN 80 –80 85 70 dBc – 5V THD – dB –85 80 2V SPAN 5V SPAN - dBc 60 75 –90 SFDR – dBc AND dBFS 70 2V SPAN - dBc 50 –95 dBc – 2V 65 –100 40 WORST CASE SPURIOUS – dBc AND dBFS 60 0.1 1 5 –60 –50 –40 –30 –20 –10 0 –40 –35 –30 –25 –20 –15 –10 –5 0 SAMPLE RATE – MSPS AIN – dBFS INPUT POWER LEVEL (F1 = F2) – dBFS
Figure 8. THD vs. Sample Rate Figure 9. Single Tone SFDR Figure 10. Dual Tone SFDR (f (f IN = 1.5 MHz, AIN = –0.5 dBFS, (fIN = 1.5 MHz, VCM = 2.5 V) 1 = 0.95 MHz, f2 = 1.04 MHz, V V CM = 2.5 V) CM = 2.5 V) –6– REV. A