ADS5481 datasheet(16/42 Pages) TI

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Input Amplitude − dBFS

100

110

120

130

−100 −90

−80

−70

−60

−50

−40

−30

−20

−10

G022

fS = 105 MSPS

fIN = 70 MHz

AIN = 0 to −100 dBFS

256k Point FFT

SFDR (dBFS,

Dither ON)

SNR (dBc,

Dither ON)

SNR (dBFS,

Dither ON)

SFDR (dBc,

Dither OFF)

SFDR (dBFS,

Dither OFF)

SFDR (dBc,

Dither ON)

Input Amplitude − dBFS

100

−40

−36

−32

−28

−24

−20

−16

−12

−8

−4

G023

fS = 105 MSPS

fIN = 70 MHz

AIN = 0 to −40 dBFS

256k Point FFT

SFDR (dBc,

Dither OFF)

SFDR (dBc,

Dither ON)

f − Frequency − MHz

−130

−120

−110

−100

−90

−80

−70

−60

−50

−40

−30

−20

−10

G024

fIN1 = 29.5 MHz, –7 dBFS

fIN2 = 30.5 MHz, –7 dBFS

IMD3 = 101 dBFS

SFDR = 101 dBFS

SNR = 80.6 dBFS

Dither Enabled, CLK = 105 MSPS

f − Frequency − MHz

−130

−120

−110

−100

−90

−80

−70

−60

−50

−40

−30

−20

−10

G025

fIN1 = 69.5 MHz, –7 dBFS

fIN2 = 70.5 MHz, –7 dBFS

IMD3 = 102 dBFS

SFDR = 100 dBFS

SNR = 80.1 dBFS

Dither Enabled, CLK = 105 MSPS

ADS5481

ADS5482

ADS5483

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

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.

ADS5482 AC PERFORMANCE

ADS5482 SFDR

INPUT AMPLITUDE (70 MHz Input Signal)

Figure 23.

Figure 24.

ADS5482 TWO-TONE INTERMODULATION DISTORTION

(FFT for 29.5 MHz and 30.5 MHz at –7 dBFS)

(FFT for 69.5 MHz and 70.5 MHz at –7 dBFS)

Figure 25.

Figure 26.

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