ADS5481 datasheet(23/42 Pages) TI

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Input Amplitude − dBFS

−80

−60

−40

−20

100

120

140

160

180

−100 −90

−80

−70

−60

−50

−40

−30

−20

−10

G046

fS = 135 MSPS

fIN = 30 MHz

AIN = −0.8 to −100 dBFS

512k Point FFT

SFDR (dBc,

Dither OFF)

SFDR (dBFS,

Dither OFF)

SNR (dBFS,

Dither OFF)

SFDR (dBc,

Dither ON)

SNR (dBc,

Dither OFF)

SFDR (dBFS,

Dither ON)

SNR (dBc,

Dither ON)

SNR (dBFS,

Dither ON)

Output Code

G045

fs = 80 MSPS for ADS5481

fs = 105 MSPS for ADS5482

fs = 135 MSPS for ADS5483

Analog Inputs Shorted to

VCM

ADS5481/5482

ADS5483

Input Amplitude − dBFS

−80

−60

−40

−20

100

120

140

160

180

−100 −90

−80

−70

−60

−50

−40

−30

−20

−10

G065

fS = 135 MSPS

fIN = 100 MHz

AIN = −0.6 to −100 dBFS

512k Point FFT

SFDR (dBc,

Dither OFF)

SFDR (dBFS,

Dither OFF)

SNR (dBFS,

Dither OFF)

SFDR (dBc,

Dither ON)

SNR (dBc,

Dither OFF)

SFDR (dBFS,

Dither ON)

SNR (dBc,

Dither ON)

SNR (dBFS,

Dither ON)

Input Amplitude − dBFS

−150

−140

−130

−120

−110

−100

−90

−80

−90

−80

−70

−60

−50

−40

−30

−20

−10

G047

Dither, Dominant Spur (dBFS)

Dither, 2F1−F2 (dBFS)

No Dither, Dominant Spur (dBFS)

Dither, 2F2−F1 (dBFS)

ADS5481

ADS5482

ADS5483

www.ti.com................................................................................................................................................... SLAS565A – JUNE 2008 – REVISED NOVEMBER 2008

TYPICAL CHARACTERISTICS (continued)

At TA = +25°C, sampling rate = max rated, 50% clock duty cycle, 3-VPP differential sinusoidal clock, analog input amplitude =

–1 dBFS, AVDD5 = 5 V, AVDD3 = 3.3 V, and DVDD3 = 3.3 V, unless otherwise noted.

ADS5483 AC PERFORMANCE

NOISE HISTOGRAM WITH INPUTS SHORTED

INPUT AMPLITUDE (30 MHz Input Signal)

Figure 46.

Figure 47.

ADS5483 AC PERFORMANCE

ADS5483 TWO-TONE PERFORMANCE

INPUT AMPLITUDE (100 MHz Input Signal)

INPUT AMPLITUDE (f1 = 39.5 MHz and f2 = 40.5 MHz)

Figure 48.

Figure 49.

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