ADS4449 datasheet(17/54 Pages) TI

17 / 54 page

−40

−15

Temperature (°C)

DRVDD = 1.7 V

DRVDD = 1.8 V

DRVDD = 1.9 V

DRVDD = 2 V

Input Frequency = 185 MHz

G018

68.5

69.5

70.5

−40

−15

Temperature (°C)

DRVDD = 1.7 V

DRVDD = 1.8 V

DRVDD = 1.9 V

DRVDD = 2 V

Input Frequency = 185 MHz

G019

−50

−40

−30

−20

−10

100

110

120

69.5

70.5

71.5

72.5

73.5

Amplitude (dBFS)

SFDR (dBc)

SFDR (dBFS)

SNR

Input Frequency = 185 MHz

G016

0.7

0.8

0.9

1.1

1.2

1.3

68.5

69.5

70.5

71.5

Input Common−Mode Voltage (V)

SFDR

SNR

Input Frequency = 185 MHz

G017

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 22. PERFORMANCE vs INPUT AMPLITUDE

Figure 23. PERFORMANCE vs

INPUT COMMON-MODE VOLTAGE

Figure 24. SPURIOUS-FREE DYNAMIC RANGE vs

Figure 25. SIGNAL-TO-NOISE RATIO vs

DRVDD SUPPLY AND TEMPERATURE

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