External VREF Applied − V

40

50

60

70

80

90

2.05 2.15 2.25 2.35 2.45 2.55 2.65 2.75 2.85 2.95 3.05 3.15

G042

fS = 500 MSPS

fIN = 230 MHz

AIN = −1 dBFS

AIN = −5 dBFS

AIN = −6 dBFS

AIN = −4 dBFS

AIN = −3 dBFS

AIN = −2 dBFS

External VREF Applied − V

−3.0

−2.5

−2.0

−1.5

−1.0

−0.5

0.0

0.5

1.0

2.2

2.3

2.4

2.5

2.6

2.7

2.8

2.9

3.0

3.1

G019

Normalized to 0 dB at Nominal VREF = 2.4 V

fS = 500 MSPS

fIN = 230 MHz

AIN = < −1 dBFS

Normalized

Amplitude

Best Fit:

y = −3.06x + 7.33

Linear

(Normalized Amplitude)

External VREF Applied − V

2.0

2.1

2.2

2.3

2.4

2.5

2.6

2.7

2.8

2.9

3.0

2.05 2.15 2.25 2.35 2.45 2.55 2.65 2.75 2.85 2.95 3.05 3.15

G052

fS = 500 MSPS

fIN = 230 MHz

External VREF Applied − V

40

45

50

55

60

65

70

2.05 2.15 2.25 2.35 2.45 2.55 2.65 2.75 2.85 2.95 3.05 3.15

G051

fS = 500 MSPS

fIN = 230 MHz

AIN = −1 dBFS

AIN = −2 dBFS

AIN = −3 dBFS

AIN = −4 dBFS

AIN = −5 dBFS

AIN = −6 dBFS

ADS5463

ADS54RF63

SLAS515E – NOVEMBER 2006 – REVISED JULY 2009 ................................................................................................................................................... www.ti.com

Figure 53. ADS5463 Signal Gain Adjustment versus

Figure 54. ADS5463 SFDR versus External VREF and AIN

External Reference (VREF)

Figure 55. ADS5463 SNR versus External VREF and AIN

Figure 56. Total Power Consumption versus External

VREF

30

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