MC68HC11G5 Datasheet, PDF(182/195 Page) Motorola, Inc – High-density Complementary Metal Oxide Semiconductor (HCMOS) Microcontroller

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MC68HC11G5 Datasheet, PDF (182/195 Pages) Motorola, Inc – High-density Complementary Metal Oxide Semiconductor (HCMOS) Microcontroller

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Freescale Semiconductor, Inc.

13.8 A/D CONVERTER CHARACTERISTICS

(VDD = 5.0 Vdc Â± 10%, VSS = 0 Vdc, TA = TL to T H, E = 750kHz to 2.1MHz unless otherwise noted)

Characteristic

Parameter

Min Absolute Max

Unit

Resolution

Number of bits resolved by the A/D

Bits

Nonlinearity

Maximum deviation from the ideal A/D transfer

characteristics

TBD LSB

Zero Error

Difference between the output of an ideal and an

TBD LSB

actual A/D for zero input voltage

Full Scale Error

Difference between the output of an ideal and an

TBD LSB

actual A/D for full scale input voltage

Total Unadjusted Error

Maximum sum of Nonlinearity, zero error and

full scale error

TBD LSB

Quantization Error

Uncertainty due to converter resolution

Â±0.5

LSB

Absolute Accuracy

(See Note 1)

Difference between the actual input voltage and the

full scale weighted equivalent of the binary output

code, all error sources included

TBD LSB

Conversion Range

(See Notes 3 and 4)

Analog input voltage range

Vrl

Vrh

Vrh (See Note 2)

Maximum analog reference voltage

Vrl

VDD + 0.1 V

Vrl (See Note 2)

Minimum analog reference voltage

VSS - 0.1

Vrh

Delta Vr (See Note 2)

Minimum difference between Vrh and V rl

Conversion Time

Total time to perform a single analog to digital

conversion:

1. E Clock

2. Internal RC Oscillator

Monotonicity

Conversion result never decreases with an increase

in input voltage and has no missing codes

tcyc

tcyc + 24 Âµs

Guaranteed

Zero Input Reading

(See Note 3)

Conversion result when V in = Vrl

$000

Hex

Full Scale reading

(See Note 4)

Conversion result when V in = Vrh

$3FF Hex

Sample Acquisition Time

Analog Input Acquisition sampling time:

1. E Clock

2. Internal RC Oscillator

Sample Hold Capacitance Input capacitance during sample PE0-PE7

tcyc

8.7

Âµs

35 (Typ)

Input Leakage

Input leakage on A/D pins:

PE0-PE7

Vrl, Vrh

100

250

ÂµA

NOTES:

1. Source impedances greater then 10kâ¦ will adversely affect accuracy, due mainly to input leakage.

2. Performance verified down to 2.5V Delta V r, but accuracy is tested and guaranteed at Delta V r = 5V Â± 10%.

3. Minimum analog input voltage should not go below V SS - 0.3V.

4. Maximum analog input voltage should not exceed 1.125V rh.

13-16

ELECTRICAL SPECIFICATIONS

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