Data Sheet

AD7626

Rev. D | Page 11 of 29

TYPICAL PERFORMANCE CHARACTERISTICS

VDD1 = 5 V; VDD2 = 2.5 V; VIO = 2.5 V; REF = 4.096 V; all plots at 10 MSPS unless otherwise noted. FFT plots for 2 MHz, 3 MHz, and

5 MHz input tones use band pass filter (±400 kHz pass bandwidth around fundamental frequency).

0

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–180

0

30

10

50

70

90

FREQUENCY (kHz)

INPUT FREQUENCY = 10.37kHz

SNR = 91.85dB

SINAD = 91.8dB

THD = –112.1dB

SFDR = 112.85dB

32k SAMPLES

Figure 5. 10 kHz, −0.5 dB Input Tone, Zoomed View

0

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FIFTH

HARMONIC

THIRD

HARMONIC

SECOND

HARMONIC

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0

0.5

1.0

1.5

2.0

2.5

3.0

3.5

4.0

4.5

5.0

FREQUENCY (MHz)

INPUT FREQUENCY = 2.0026MHz

–0.5dB INPUT AMPLITUDE

SNR = 87.4dBFS

SINAD = 84.8dBFS

THD = –87.9dB

SFDR = 88.1dB

64k SAMPLES

Figure 6. FFT, 2 MHz, −0.5 dB Input Tone, Wide View

0

–20

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–60

SECOND

HARMONIC

THIRD

HARMONIC

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–180

0

0.5

1.0

1.5

2.0

2.5

3.0

3.5

4.0

4.5

5.0

FREQUENCY (MHz)

INPUT FREQUENCY = 3.00125MHz

–0.5dB INPUT AMPLITUDE

SNR = 87.1dBFS

SINAD = 81.2dBFS

THD = –82.0dB

SFDR = 82.1dB

64k SAMPLES

FOURTH

HARMONIC

FIFTH

HARMONIC

Figure 7. FFT, 3 MHz, −0.5 dB Input Tone, Wide View

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5.0

4.5

4.0

3.5

3.0

2.5

2.0

1.5

1.0

0.5

FREQUENCY (MHz)

INPUT FREQUENCY = 100kHz

SNR = 91.323dB

SINAD = 91.047dB

THD = –102.543dB

SFDR = 104.529dB

Figure 8.100 kHz, −0.5 dB Input Tone FFT, Full Frequency View

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0.5

1.0

1.5

2.0

2.5

3.0

3.5

4.0

4.5

5.0

FIFTH

HARMONIC

FREQUENCY (MHz)

INPUT FREQUENCY = 2.0026MHz

–6dB INPUT AMPLITUDE

SNR = 87.6dBFS

SINAD = 87.6dBFS

THD = –101.6dB

SFDR = 101.9dB

64k SAMPLES

THIRD

HARMONIC

SECOND

HARMONIC

Figure 9. FFT, 2 MHz, −6 dB Input Tone, Wide View

0

–20

–40

–60

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–180

0

0.5

1.0

1.5

2.0

2.5

3.0

3.5

4.0

4.5

5.0

FREQUENCY (MHz)

INPUT FREQUENCY = 3.00125MHz

–6dB INPUT AMPLITUDE

SNR = 88.48dBFS

SINAD = 88.3dBFS

THD = –97.2dB

SFDR = 98.3dB

64k SAMPLES

THIRD

HARMONIC

FOURTH

HARMONIC

SECOND

HARMONIC

FIFTH

HARMONIC

Figure 10. FFT, 3 MHz, −6 dB Input Tone, Wide View