ADS7870

SBAS124C − DECEMBER 1999 − REVISED DECEMBER 2005

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7

Figure 1

0

−5

−10

−60 −40 −20

0

20

40

60

5

10

GAIN ERROR

vs

FREE-AIR TEMPERATURE

15

80

100 120 140

TA − Free-Air Temperature − °C

Gain = 20

Gain = 8

Gain = 1

Figure 2

4

2

−2

−4

−60 −40 −20

0

20

40

60

6

8

OUTPUT OFFSET ERROR

vs

FREE-AIR TEMPERATURE

10

80

100 120 140

0

TA − Free-Air Temperature − °C

Gain = 20

Gain = 8

Gain = 1

Figure 3

−0.2

−0.4

−0.8

−1

−60 −40 −20

0

20

40

60

0

0.2

VOLTAGE REFERENCE ERROR

vs

FREE-AIR TEMPERATURE

0.4

80

100 120 140

−0.6

TA − Free-Air Temperature − °C

3 Sigma

VREF

−3 Sigma

VREF = 2.048 V or 2.5 V

Figure 4

TA − Free-Air Temperature − °C

2.40

2.35

2.25

2.20

−60 −40 −20

0

20

40

60

2.45

2.50

INTERNAL OSCILLATOR FREQUENCY

vs

FREE-AIR TEMPERATURE

2.55

80 100 120 140

2.30

3 Sigma

Avg

−3 Sigma

† At TA= 25°C, VDD = 5 V, VREF = 2.5 V connected to BUFIN (using internal reference), 2.5 MHz CCLK, and 2.5 MHz SCLK (unless otherwise noted)