ADS7891IPFBT datasheet(13/31 Pages) TI1

13 / 31 page

ADS7891

SLAS410 − DECEMBER 2003

www.ti.com

TYPICAL CHARACTERISTICS(1)

Figure 13

758

2664

1350

208

500

1000

1500

2000

2500

3000

8190 8191 8192 8193 8194 8195 8196 8197

Code

DC CODE SPREAD AT CENTER OF CODE

+VA = 5 V,

+VBD = 5 V,

Code = 8193,

Sample Rate = 3 MSPS,

Vref = 2.5 V,

TA = 25

Figure 14

12.1

12.2

12.3

12.4

12.5

12.6

12.7

12.8

12.9

−40

−20

EFFECTIVE NUMBER OF BITS

FREE-AIR TEMPERATURE

TA − Free-Air Temperature − °C

fi = 100 kHz,

Sample Rate = 3 MSPS,

+VA = 5 V,

+VBD = 5 V,

Vref = 2.5 V

Figure 15

−40

−20

SIGNAL-TO-NOISE AND DISTORTION

FREE-AIR TEMPERATURE

TA − Free-Air Temperature − °C

fi = 100 kHz,

Sample Rate = 3 MSPS,

+VA = 5 V,

+VBD = 5 V,

Vref = 2.5 V

Figure 16

75.5

76.5

77.5

78.5

−40

−20

SIGNAL-TO-NOISE RATIO

FREE-AIR TEMPERATURE

TA − Free-Air Temperature − °C

fi = 100 kHz,

Sample Rate = 3 MSPS,

+VA = 5 V,

+VBD = 5 V,

Vref = 2.5 V

(1) At Vref = 2.5 V external, unless otherwise specified.

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