AD9260EB datasheet(18/36 Pages) AD

18 / 36 page

AD9260

–18–

REV. B

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)

CLOCK FREQUENCY – MHz

100

FULL BIAS

QUARTER BIAS

HALF BIAS

Figure 41. SFDR vs. Clock Rate (fIN = 100 kHz in 8

× Mode)

FULL BIAS

CLOCK FREQUENCY – MHz

100

QUARTER BIAS

HALF BIAS

Figure 42. SFDR vs. Clock Rate (fIN = 500 kHz in 4

× Mode)

FULL BIAS

CLOCK FREQUENCY – MHz

100

QUARTER BIAS

HALF BIAS

Figure 43. SFDR vs. Clock Rate (fIN = 1.0 MHz in 2

× Mode)

FIN = 1MHz, 2 MODE

FIN = 100kHz, 8 MODE

COMMON MODE INPUT LEVEL – Volts

1.0

–100

–60

1.2

–65

–70

–75

–80

–85

–90

–95

1.4

1.6

1.8

2.0

2.2

2.4

2.6

2.8

3.0

Figure 44. THD vs. Common-Mode Input Level (CML)

INPUT FREQUENCY – Hz

–40

100M

100k

10M

10k

–50

–60

–70

–80

–90

FS = 10MHz

FS = 20MHz

FS = 5MHz

Figure 45. CMR vs. Input Frequency (VCML = 2 V p-p, 1

Mode)

FREQUENCY – MHz

100

0.2

0.4

0.6

0.8

1.0

1.2

1.4

1.6

4V SPAN SNR-8

MODE

4V SPAN SFDR-2

MODE

1.6V SPAN SNR-8

MODE

1.6V SPAN SFDR-2

MODE

Figure 46. 4 V vs. 1.6 V Span SNR/SFDR (fCLOCK = 20 MSPS)

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