ADS4128 datasheet(33/61 Pages) TI

33 / 61 page

−46

−41

−36

−31

−26

−21

−16

−11

−6

−1

100

110

120

Amplitude (dBFS)

SNR (dBFS)

SFDR (dBc)

SFDR (dBFS)

Input Frequency = 170 MHz

G011

0.8

0.85

0.9

0.95

1.05

1.1

68.5

69.5

70.5

71.5

72.5

Input Common−Mode Voltage (V)

SNR

SFDR

Input Frequency = 40 MHz

G012

0.5

1.5

2.5

3.5

4.5

5.5

Digital Gain (dB)

10 MHz

70 MHz

150 MHz

170 MHz

220 MHz

300 MHz

400 MHz

500 MHz

G009

−46

−41

−36

−31

−26

−21

−16

−11

−6

−1

100

110

120

Amplitude (dBFS)

SNR (dBFS)

SFDR (dBc)

SFDR (dBFS)

Input Frequency = 40 MHz

G010

ADS4128

www.ti.com

SBAS578 – MAY 2012

TYPICAL CHARACTERISTICS (continued)

At +25°C, AVDD = 1.8 V, DRVDD = 1.8 V, maximum rated sampling frequency, sine wave input clock, 1.5-VPP differential

clock amplitude, 50% clock duty cycle, –1-dBFS differential analog input, 0-dB gain, low-latency mode, DDR LVDS output

interface, and 32k-point FFT, unless otherwise noted.

SINAD vs DIGITAL GAIN

PERFORMANCE ACROSS INPUT AMPLITUDE

Figure 20.

Figure 21.

PERFORMANCE ACROSS INPUT AMPLITUDE

PERFORMANCE vs INPUT COMMON-MODE VOLTAGE

Figure 22.

Figure 23.

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