ADS4449 datasheet(16/54 Pages) TI

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0.5

1.5

2.5

3.5

4.5

5.5

Digital Gain (dB)

40 MHz

100 MHz

130 MHz

170 MHz

230 MHz

300 MHz

350 MHz

400 MHz

450 MHz

G014

−70

−60

−50

−40

−30

−20

−10

70.5

71.5

72.5

73.5

74.5

75.5

100

110

120

130

Amplitude (dBFS)

SNR(dBFS)

SFDR(dBc)

SFDR(dBFS)

Input Frequency = 70 MHz

G015

120

160

200

240

280

320

360

400

Input Frequency (MHz)

G012

100

104

0.5

1.5

2.5

3.5

4.5

5.5

Digital Gain (dB)

40 MHz

100 MHz

130 MHz

170 MHz

230 MHz

300 MHz

350 MHz

400 MHz

450 MHz

G013

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 18. SIGNAL-TO-NOISE RATIO vs INPUT FREQUENCY

Figure 19. SPURIOUS-FREE DYNAMIC RANGE

vs DIGITAL GAIN

Figure 20. SIGNAL-TO-NOISE RATIO vs DIGITAL GAIN

Figure 21. PERFORMANCE vs INPUT AMPLITUDE

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