ADS4449 datasheet(14/54 Pages) TI

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−120

−100

−80

−60

−40

−20

100

125

Frequency (MHz)

Each Tone at

−7 dBFS Amplitude

fIN1 = 45 MHz

fIN2 = 50 MHz

2−Tone IMD = 87 dBFS

SFDR = 92 dBFS

G007

−120

−100

−80

−60

−40

−20

100

125

Frequency (MHz)

Each Tone at

−36 dBFS Amplitude

fIN1 = 45 MHz

fIN2 = 50 MHz

2−Tone IMD = 99 dBFS

SFDR = 99 dBFS

G008

−120

−100

−80

−60

−40

−20

100

125

Frequency (MHz)

FIN = 170 MHz

SFDR = 89 dBc

SNR = 69 dBFS

SINAD = 68.9 dBFS

THD = 85 dBc

G005

−120

−100

−80

−60

−40

−20

100

125

Frequency (MHz)

FIN = 230 MHz

SFDR = 86 dBc

SNR = 68.6 dBFS

SINAD = 68.5 dBFS

THD = 84 dBc

G006

ADS4449

SBAS603 – APRIL 2013

www.ti.com

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 10. FFT FOR 170-MHz INPUT SIGNAL

Figure 11. FFT FOR 230-MHz INPUT SIGNAL

Figure 12. FFT FOR TWO-TONE INPUT SIGNAL

Figure 13. FFT FOR TWO-TONE INPUT SIGNAL

(–7 dBFS)

(–36 dBFS)

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