ADS1205

SBAS312A − JANUARY 2005 − REVISED APRIL 2005

www.ti.com

9

TYPICAL CHARACTERISTICS (continued)

AVDD = 5V, BVDD = 3V, CH x+ = 0.5V to 4.5V, CH x− = 2.5V, REFIN = REFOUT = internal +2.5V, CLKIN = 20MHz, and 16-bit Sinc3 filter with

decimation by 256, unless otherwise noted.

Figure 8

OFFSET vs POWER SUPPLY

4.50

4.75

5.00

5.25

5.50

Power Supply (V)

−0.8

−1.0

−1.2

−1.4

−1.6

CLKIN = 32MHz

CLKIN = 20MHz

Figure 9

REFERENCE VOLTAGE vs TEMPERATURE

60

−40

−20

20

40

080

100

Temperature (

_C)

2.510

2.508

2.506

2.504

2.502

2.500

2.498

2.496

2.494

2.492

2.490

Figure 10

GAIN vs TEMPERATURE

60

−40

−20

20

40

0

80

100

Temperature (

_C)

0.25

0.20

0.15

0.10

0.05

0

−0.05

−0.10

−0.15

−0.20

−0.25

CLKIN = 32MHz

CLKIN = 20MHz

Figure 11

GAIN MATCH vs TEMPERATURE

60

−40

−20

20

40

080

100

Temperature (

_C)

0.125

0.120

0.115

0.110

0.105

0.100

0.095

0.090

0.085

0.080

0.075

CLKIN = 20MHz

CLKIN = 32MHz

Figure 12

SIGNAL−TO−NOISE RATIO

vs TEMPERATURE

60

−40

−20

20

40

0

80

100

Temperature (

_C)

89.0

88.9

88.8

88.7

88.6

88.5

88.4

88.3

88.2

88.1

88.0

CLKIN = 32MHz

4V

PP

5kHz

CLKIN = 20MHz

Figure 13

SIGNAL−TO−NOISE + DISTORTION

vs TEMPERATURE

60

−40

−20

20

40

0

80

100

Temperature (

_C)

89.2

89.0

88.8

88.6

88.4

88.2

88.0

87.8

87.6

CLKIN = 32MHz

CLKIN = 20MHz

4V

PP

5kHz