80C196MH datasheet(35/41 Pages) INTEL

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8XC196MH INDUSTRIAL MOTOR CONTROL CHMOS MICROCONTROLLER

AC CHARACTERISTICS — A/D CONVERTER

Table 16. 10-bit A/D Operating Conditions (1)

Symbol

Description

Min

Max

Units

Notes

Ambient Temperature

– 40

+ 85

°C

Digital Supply Voltage

4.50

5.50

REF

Analog Supply Voltage

4.50

5.50

SAM

Sample Time

1.0

µs3

CONV

Conversion Time

10.0

20.0

µs3

OSC

Oscillator Frequency

MHz

NOTES:

ANGND and V

SS should nominally be at the same potential.

REF must not exceed VCC by more than + 0.5 V because VREF supplies both the resistor ladder and the

analog portion of the converter and input port pins.

Program the AD_TIME register to meet the T

SAM and TCONV specifications.

Table 17. 10-bit Mode A/D Characteristics Over Specified Operating Conditions (1)

Parameter

Typical (3)

Min

Max

Units (2)

Notes

Resolution

1024

Levels

Bits

Absolute Error

± 3LSBs

Full-scale Error

0.25

± 0.5

LSBs

Zero Offset Error

0.25

± 0.5

LSBs

Nonlinearity

1.0

± 2.0

± 3LSBs

Differential Nonlinearity

– 0.75

+ 0.75

LSBs

Channel-to-channel Matching

± 0.1

± 1

LSBs

Repeatability

± 0.25

LSBs

NOTES:

Testing is performed with V

REF = 5.12 V and FOSC = 16 MHz.

LSB, as used here, has a value of approximately 5 mV.

Typical values are based on a limited number of samples and are not guaranteed. Operating conditions

for typical values are room temperature and V

REF = VCC = 5.5 V.

DC to 100 KHz.

Multiplexer break-before-make guaranteed.

Resistance from device pin, through internal multiplexer, to sample capacitor.

These values may be exceeded if the pin current is limited to ± 2mA.

Applying voltage beyond these specifications will degrade the accuracy of other channels being con-

verted.

All conversions were performed with processor in idle mode.

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