ADS6445 datasheet(39/80 Pages) TI

39 / 80 page

fIN − Input Frequency − MHz

100

150

200

250

G041

Gain = 0 dB

Gain = 3.5 dB

fIN − Input Frequency − MHz

100

150

200

250

G042

Gain = 0 dB

Gain = 3.5 dB

fIN − Input Frequency − MHz

110 130 150 170 190 210 230

G043

Input adjusted to get −1dBFS input

1 dB

6 dB

2 dB

4 dB

3 dB

5 dB

0 dB

fIN − Input Frequency − MHz

100

120

140

160

180

200

220

G044

2 dB

5 dB

1 dB

0 dB

3 dB

3.5 dB

4 dB

6 dB

AVDD − Supply Voltage − V

3.0

3.1

3.2

3.3

3.4

3.5

3.6

G045

SNR

SFDR

fIN = 50.1 MHz

LVDD = 3.3 V

LVDD − Supply Voltage − V

3.0

3.1

3.2

3.3

3.4

3.5

3.6

G046

fIN = 50.1 MHz

AVDD = 3.3 V

SNR

SFDR

ADS6445, ADS6444

ADS6443, ADS6442

www.ti.com

SLAS531B – MAY 2007 – REVISED DECEMBER 2009

TYPICAL CHARACTERISTICS (continued)

All plots are at 25°C, AVDD = LVDD = 3.3 V, maximum rated sampling frequency, sine wave input clock, 1.5 VPP differential

clock amplitude, 50% clock duty cycle, –1 dBFS differential analog input, internal reference mode, 0 dB gain, 32k point FFT

(unless otherwise noted)

SFDR vs INPUT FREQUENCY

SNR vs INPUT FREQUENCY

Figure 46.

Figure 47.

SFDR vs INPUT FREQUENCY ACROSS GAINS

SINAD vs INPUT FREQUENCY ACROSS GAINS

Figure 48.

Figure 49.

PERFORMANCE vs AVDD

PERFORMANCE vs LVDD

Figure 50.

Figure 51.

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ADS6445 Datasheet(PDF) 39 Page - Texas Instruments

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