Analog Integrated Circuit Device Data

Freescale Semiconductor

13

34921

STATIC ELECTRICAL CHARACTERISTICS

Analog-to-Digital Converter (cont)

Zero Error (18), (19)

–

±1.0

±8.0

LSB(20)

Zero Error Drift

Over Time and Temperature (18)

–

±4.0

–

LSB

Full Scale Error (18), (19), (21)

–

±2.0

±8.0

LSB

Notes

18.

Errors include effects of multiplexer and sample and hold circuitry, including droop.

19.

The Zero Error is defined as the number of LSB values away from the ideal value of 1/2 LSB that the ADC output count will transition

from 0 to 1 when the input is swept through the range of interest. The transition must occur within the specified range.

20.

An LSB is defined as follows:

21.

The Full Scale Error is defined as the number of LSB values away from the ideal value of -1/2 LSB from Full Scale that the ADC output

count actually transitions from -1 LSB count to Full Scale count when the input voltage is swept through the voltage range of interest.

The transition must occur within the specified range.

Table 3. Static Electrical Characteristics (continued)

Characteristic

Symbol

Min

Typ

Max

Unit

1

03

2

5

47

6

000

001

010

011

100

101

110

111

Input Voltage

Zero Error

Ideal Transfer

Characteristic

Actual Transfer

Characteristic

1

03

2

5

47

6

000

001

010

011

100

101

110

111

Input Voltage

Full Scale Error

Ideal Transfer

Characteristic

Actual Transfer

Characteristic

1

03

25

47

6

000

001

010

011

100

101

110

111

Input Voltage

Differential

Nonlinearity

1

03

2

5

47

6

000

001

010

011

100

101

110

111

Input Voltage

Integral

Nonlinearity

LSB =

IMR

Volts

Where:

IMR is the Ideal Measurement Range.

#BITS is the resolution of the ADC.