ADS4449 datasheet(13/56 Pages) TI1

13 / 56 page

120

160

200

240

280

320

360

400

Input Frequency (MHz)

G011

HD2 (dBc)

Temperature = −40°C

Temperature = 25°C

Temperature = 85°C

G039

−120

−100

−80

−60

−40

−20

100

125

Frequency (MHz)

G009

−120

−100

−80

−60

−40

−20

100

125

Frequency (MHz)

G010

−120

−100

−80

−60

−40

−20

100

125

Frequency (MHz)

G007

−120

−100

−80

−60

−40

−20

100

125

Frequency (MHz)

G008

ADS4449

www.ti.com

SBAS603A – APRIL 2013 – REVISED JANUARY 2016

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.

Each Tone at –7-dBFS Amplitude

Each Tone at –36-dBFS Amplitude

fIN1 = 45 MHz

fIN2 = 50 MHz

SFDR = 92 dBFS

fIN1 = 45 MHz

fIN2 = 50 MHz

SFDR = 99 dBFS

2-Tone IMD = 87 dBFS

2-Tone IMD = 99 dBFS

Figure 8. FFT for Two-Tone Input Signal

Figure 9. FFT for Two-Tone Input Signal

Each Tone at –7-dBFS Amplitude

Each Tone at –36-dBFS Amplitude

fIN1 = 185.1 MHz

fIN2 = 190.1 MHz

SFDR = 102 dBFS

fIN1 = 185.1 MHz

fIN2 = 190.1 MHz

SFDR = 100 dBFS

2-Tone IMD = 97 dBFS

2-Tone IMD = 101 dBFS

Figure 10. FFT for Two-Tone Input Signal

Figure 11. FFT for Two-Tone Input Signal

Input Frequency = 170 MHz

Figure 13. HD2 Distribution over Multiple Devices

Figure 12. Spurious-Free Dynamic Range

vs Input Frequency

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