ADS4128 datasheet(32/61 Pages) TI

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100

150

200

250

300

350

400

450

500

Input Frequency (MHz)

G007

100

105

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

G008

−120

−110

−100

−90

−80

−70

−60

−50

−40

−30

−20

−10

100

Frequency (MHz)

Each Tone at −36−dBFS Amplitude

fIN1 = 185 MHz

fIN2 = 190 MHz

IMD3 = 104.2 dBFS

G005

100

150

200

250

300

350

400

450

500

Input Frequency (MHz)

G006

ADS4128

SBAS578 – MAY 2012

www.ti.com

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.

FFT FOR TWO-TONE INPUT SIGNAL

SFDR vs INPUT FREQUENCY

Figure 16.

Figure 17.

SNR vs INPUT FREQUENCY

SFDR vs DIGITAL GAIN

Figure 18.

Figure 19.

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