ADS5484 datasheet(21/37 Pages) TI

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Applied External VREF − V

−4

−2

0.5

0.6

0.7

0.8

0.9

1.0

1.1

1.2

1.3

1.4

G057

fS = 135 MSPS

fIN = 30 MHz

AIN ≤ −1 dBFS

Normalized to 1.2 VREF

Linear Fit: y = −9.8x + 11.8

Applied External VREF − V

100

0.5

0.6

0.7

0.8

0.9

1.0

1.1

1.2

1.3

1.4

G058

fS = 135 MSPS

fIN = 30 MHz

Dither Enabled

Signal Amplitude Relative

to Adjusted Fullscale

AIN = −3 dBFS

AIN = −7 dBFS

AIN = −6 dBFS

AIN = −4 dBFS

AIN = −10 dBFS

AIN = −2 dBFS

AIN = −1 dBFS

Applied External VREF − V

0.5

0.6

0.7

0.8

0.9

1.0

1.1

1.2

1.3

1.4

G059

fS = 135 MSPS

fIN = 30 MHz

Dither Enabled

Signal Amplitude Relative

to Adjusted Fullscale

AIN = −6 dBFS

AIN = −10 dBFS

AIN = −7 dBFS

AIN = −4 dBFS

AIN = −3 dBFS

AIN = −1 dBFS

AIN = −2 dBFS

Applied External VREF − V

1.7

1.8

1.9

2.0

2.1

2.2

2.3

0.5

0.6

0.7

0.8

0.9

1.0

1.1

1.2

1.3

1.4

G060

fS = 135 MSPS

fIN = 30 MHz

Signal Adjusted to −1 dBFS

Applied External VREF − V

3.10

3.11

3.12

3.13

3.14

3.15

3.16

3.17

3.18

3.19

3.20

0.5

0.6

0.7

0.8

0.9

1.0

1.1

1.2

1.3

1.4

G061

ADS5484

ADS5485

www.ti.com ............................................................................................................................................... SLAS610C – AUGUST 2008 – REVISED OCTOBER 2009

Figure 32. Signal Gain Adjustment versus External

Figure 33. SFDR versus External VREF and AIN

Reference (VREF)

Figure 34. SNR versus External VREF and AIN

Figure 35. Total Power Consumption versus

External VREF

Figure 36. VCM Pin Output versus External VREF

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