ADS7881IPFBT datasheet(13/32 Pages) TI1

13 / 32 page

ADS7881

SLAS400B − SEPTEMBER 2003 − REVISED NOVEMBER 2005

www.ti.com

TYPICAL CHARACTERISTICS(1)

Figure 13

20000

40000

60000

80000

100000

120000

140000

2046

2047

2048

2049

2050

Code

HISTOGRAM

(DC CODE SPREAD AT THE CENTER OF CODE)

+VA = 5 V,

+VBD = 5 V,

Code = 2048,

TA = 255C

Count = 130879

Count

= 0

Count

= 1

Count

= 192

Count

= 0

Figure 14

11.1

11.2

11.3

11.4

11.5

11.6

11.7

11.8

11.9

−40

−20

EFFECTIVE NUMBER OF BITS

FREE-AIR TEMPERATURE

TA − Free-Air Temperature − °C

fi = 100 kHz,

+VA = 5 V,

+VBD = 5 V

Figure 15

71.2

71.4

71.6

71.8

−40

−20

SIGNAL-TO-NOISE AND DISTORTION

FREE-AIR TEMPERATURE

TA − Free-Air Temperature − °C

fi = 100 kHz,

+VA = 5 V,

+VBD = 5 V

Figure 16

71.1

71.2

71.3

71.4

71.5

71.6

71.7

71.8

71.9

−40

−20

SIGNAL-TO-NOISE RATIO

FREE-AIR TEMPERATURE

TA − Free-Air Temperature − °C

fi = 100 kHz,

+VA = 5 V,

+VBD = 5 V

(1) At sample rate = 4 MSPS, Vref = 2.5 V external, unless otherwise specified.

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