LTC2984 datasheet(62/78 Pages) AD

62 / 78 page

LTC2984

2984fb

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the bottom 24 are the ADC reading in volts. For direct

ADC readings hard fault errors do not clamp the digital

output. Readings beyond ±1.125 • VREF/2 exceed the

normal accuracy range of the LTC2984 and flag a soft

error; these results should be discarded. Readings

beyond ±1.75 • VREF/2 exceed the usable range of the

Figure 37. Integral Nonlinearity as a Function of

Temperature at VDD = 5.25V

Figure 38. Integral Nonlinearity as a Function of

Temperature at VDD = 3.3V

DIFFERENTIAL INPUT VOLTAGE (V)

2984 F37

–5

–10

–15

–20

–1.5

–0.5

0.5

1.5

–1

90°C

25°C

–45°C

DIFFERENTIAL INPUT VOLTAGE (V)

2984 F38

–5

–10

–15

–20

–1.5

–0.5

0.5

1.5

–1

90°C

25°C

–45°C

LTC2984; these result in a hard fault and should be

discarded.

Figures 37 to 39 show typical integral nonlinearity varia-

tion at various supply voltages and temperatures for a

differential input voltage (±VREF/2) and VREF/2 common

mode input voltage.

Figure 39. Integral Nonlinearity as a Function of

Temperature at VDD = 2.85V

DIFFERENTIAL INPUT VOLTAGE (V)

2984 F39

–5

–10

–15

–20

–1.5

–0.5

0.5

1.5

–1

90°C

25°C

–45°C

SUPPLEMENTAL INFORMATION

LTC2984 Datasheet(PDF) 62 Page - Analog Devices

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