ADS1204

SBAS301A − OCTOBER 2003 − REVISED JUNE 2004

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11

TYPICAL CHARACTERISTICS (continued)

AVDD = 5V, BVDD = 3V, CH x+ = +0.5V to +4.5V, CH x− = +2.5V, REFIN = external, CLKSEL = 0, and 16-bit Sinc3 filter, with OSR = 256, unless

otherwise noted.

EFFECTIVE NUMBER OF BITS

vs DECIMATION RATIO

10

100

1k

10k

Decimation Ratio (OSR)

18

16

14

12

10

8

6

4

110

98

86

74

62

50

38

26

POWER−SUPPLY CURRENT

vs TEMPERATURE

−40

−20

0

20

40

60

80

100

Temperature (

_C)

30

27

24

21

18

15

CLKSEL = 1

CLKSEL = 0, CLKIN = 20MHz

CLKSEL = 0, CLKIN = 32MHz

COMMON−MODE REJECTION RATIO

vs FREQUENCY

1

10

100

Input Frequency (kHz)

110

105

100

95

90

85

80

75

70

65

60

POWER−SUPPLY REJECTION RATIO

vs FREQUENCY

0.1

1

10

100

Frequency of Power Supply (kHz)

110

100

90

80

70

60

50

CLOCK FREQUENCY vs TEMPERATURE

−40

−20

60

40

80

020

100

Temperature (

_C)

10.0

9.8

9.6

9.4

9.2

9.0

8.8

8.6

8.4

8.2

8.0

CLOCK FREQUENCY vs POWER SUPPLY

4.5

4.7

4.9

5.1

5.3

5.5

Power Supply (V)

9.8

9.7

9.6

9.5

9.4

9.3

9.2