ADS4449 datasheet(19/54 Pages) TI

19 / 54 page

−60

−55

−50

−45

−40

−35

−30

−25

−20

−15

−10

−5

100

150

200

250

300

Frequency of Input Common−Mode Signal (MHz)

Input Frequency = 185 MHz

50−mVPP Signal Superimposed on VCM

G026

−120

−100

−80

−60

−40

−20

100

125

Frequency (MHz)

FIN = 185 MHz

FCM = 10 MHz, 50−mVPP

SFDR = 76 dBc

Amlpitude(FIN) = −1 dBFS

Amlpitude(FCM) = −95 dBFS

Amplitude

FIN + FCM = −77.2 dBFS

Amplitude

FIN − FCM = −80.9 dBFS

G027

0.2

0.5

0.8

1.1

1.4

1.7

2.3

100

65.5

66.5

67.5

68.5

69.5

70.5

Differential Clock Amplitudes (Vpp)

SFDR

SNR

Input Frequency = 185 MHz

G024

67.5

68.5

69.5

70.5

71.5

Input Clock Duty Cycle (%)

SNR

THD

Input Frequency = 185 MHz

G025

ADS4449

www.ti.com

SBAS603 – APRIL 2013

TYPICAL CHARACTERISTICS (continued)

At +25°C, AVDD = 1.9 V, AVDD3V = 3.3 V, DRVDD = 1.8 V, rated sampling frequency, 0-dB gain, sine-wave input clock,

1.5-VPP differential clock amplitude, 50% clock duty cycle, –1-dBFS differential analog input, DDR LVDS output interface, and

32k-point FFT, unless otherwise noted.

Figure 30. PERFORMANCE vs CLOCK AMPLITUDE

Figure 31. PERFORMANCE vs CLOCK DUTY CYCLE

Figure 32. COMMON-MODE REJECTION RATIO SPECTRUM

Figure 33. COMMON-MODE REJECTION RATIO vs

TEST SIGNAL FREQUENCY

Submit Documentation Feedback

Product Folder Links: ADS4449

ADS4449 Datasheet(PDF) 19 Page - Texas Instruments

ADS4449 Datasheet(HTML) 19 Page - Texas Instruments

Html Pages

1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 21 22 23 24 25 26 27 28 29 30 31 32 33 34 35 36 37 38 39 40 41 42 43 44 45 46 47 48 49 50 51 52 53 54

Datasheet Download

Link URL