AD9260AS datasheet(21/45 Pages) AD

21 / 45 page

AD9260

Rev. C | Page 20 of 44

TYPICAL AC CHARACTERIZATION CURVES

AVDD = DVDD = DRVDD = +5 V, 4 V Input Span, AIN = –0.5 dBFS, Differential DC Coupled Input with CML = 2 V.

100

CLOCK FREQUENCY (MHz)

010

QUARTER BIAS

HALF BIAS

FULL BIAS

Figure 47. SFDR vs. Clock Rate (fIN = 100 kHz in 8x Mode)

FULL BIAS

CLOCK FREQUENCY (MHz)

100

QUARTER BIAS

HALF BIAS

Figure 48. SFDR vs. Clock Rate (fIN = 500 kHz in 4x Mode)

FULL BIAS

CLOCK FREQUENCY (MHz)

100

QUARTER BIAS

HALF BIAS

Figure 49. SFDR vs. Clock Rate (fIN = 1.0 MHz in 2x Mode)

–100

–95

–90

–85

–80

–75

–70

–65

–60

1.0

1.2

1.4

1.6

1.8

2.0

2.2

2.4

2.6

2.8

3.0

COMMON MODE INPUT LEVEL (V)

FIN = 100kHz, 8 × MODE

FIN = 1MHz, 2 × MODE

Figure 50. THD vs. Common-Mode Input Level (CML)

–90

–80

–70

–60

–50

–40

10k

100k

10M

100M

INPUT FREQUENCY (Hz)

FS = 5MHz

FS = 10MHz

FS = 20MHz

Figure 51. CMR vs. Input Frequency (VCML = 2 V p-p, 1x Mode)

100

0.8

0.6

0.2

0.4

01.0

1.2

FREQUENCY (MHz)

1.6

4V SPAN SNR-8

× MODE

1.6V SPAN SNR-8

× MODE

4V SPAN SFDR-2

× MODE

1.6V SPAN SFDR-2

× MODE

Figure 52. 4 V vs. 1.6 V Span SNR/SFDR (fCLOCK = 20 MSPS)

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