M80C196KB

A TO D CHARACTERISTICS

There are two modes of AD operation with or with-

out clock prescaler The speed of the AD converter

can be adjusted by setting a clock prescaler on or

off At high frequencies more time is needed for the

comparator to settle The maximum frequency with

the clock prescaler disabled is 8 MHz The conver-

sion times with the prescaler turned on or off is

shown in the table below

The converter is ratiometric

so the absolute

accuracy is directly dependent on the accuracy and

supplies both the resistor ladder and the digital sec-

tion of the converter

AD CONVERTER SPECIFICATIONS

The specifications given below assume adherence

to the Operating Conditions section of this data

512V and 12 MHz on XTAL1

Clock Prescaler On

Clock Prescaler Off

IOC24 e 0

IOC24 e 1

Mode 0 – 158 States

Mode 2 – 91 States

2633 ms

12 MHz

2275 ms

8 MHz

Parameter

Typical (1)

Minimum

Maximum

Units

Notes

Resolution

256

1024

Levels

10

Bits

Absolute Error

0

g

4

LSBs

Full Scale Error

b

LSBs

Zero Offset Error

g

05

LSBs

Non-Linearity

0

g

4

LSBs

Differential Non-Linearity

0

g

2

LSBs

Channel-to-Channel Matching

0

g

1

LSBs

Repeatability

g

025

LSBs

Temperature Coefficients

Offset

0009

LSB C

Full Scale

0009

LSB C

Differential Non-Linearity

0009

LSB C

Off Isolation

b

60

dB

2 3

Feedthrough

b

60

dB

2

b

60

dB

2

Input Resistance

750

12K

X

DC Input Leakage

0

30

m

A

Sample Time Slow Mode

15

States

4

Fast Mode

8

States

4

Input Capacitance

3

pF

NOTES

An ‘‘LSB’’ as used here has a value of approximately 5 mV

1 These values are expected for most parts at 25 C but are not tested or guaranteed

2 DC to 100 KHz

3 Multiplexer Break-Before-Make Guaranteed

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