ADS1222

SBAS314A − APRIL 2004 − REVISED SEPTEMBER 2004

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7

TYPICAL CHARACTERISTICS (continued)

At TA = −40°C to +85°C, VDD = +5V, fCLK = 2MHz, and VREF = +2.5V, unless otherwise noted.

Figure 7

Input Voltage, V

−3

−4

−2

−1

0

1

234

5

−5

15

10

5

0

−5

−10

−15

INTEGRAL NONLINEARITY vs INPUT VOLTAGE

f

Buffer Off

−40_C

+25

_C

+85

_C

Figure 8

−1.5

−2.5

−0.5

0.5

1.5

2.5

3.5

−3.5

INTEGRAL NONLINEARITY vs INPUT VOLTAGE

Input Voltage, V

f

Buffer On

15

10

5

0

−5

−10

−15

−40_C

+25

_C

+85

_C

Figure 9

NOISE vs INPUT VOLTAGE

Input Voltage, V

−3

−1

135

−5

2.5

2.0

1.5

1.0

0.5

0

f

Buffer Off

Figure 10

NOISE vs INPUT VOLTAGE

Input Voltage, V

0.5

1.5

3.5

−3.5

2.0

1.8

1.6

1.4

1.2

1.0

0.8

0.6

0.4

0.2

0

f

Buffer On

−2.5

−1.5

−0.5

2.5

Figure 11

NOISE vs INPUT VOLTAGE

Input Voltage, V

−3

−1

135

−5

2.5

2.0

1.5

1.0

0.5

0

f

Buffer Off

Figure 12

NOISE vs INPUT VOLTAGE

2.5

2.0

1.5

1.0

0.5

f

Buffer On

Input Voltage, V

0.5

1.5

3.5

−3.5

−2.5

−1.5

−0.5

2.5