Z8F021ASH020SC datasheet(140/276 Pages) ZILOG

140 / 276 page

PS022815-0206

Analog-to-Digital Converter

Z8 Encore! XP® 4K Series

Product Specification

121

Compensation Steps:

1. Correct for Offset

ADC MSB

ADC LSB

Offset MSB

Offset LSB

#1 MSB

#1 LSB

2. Take absolute value of the offset corrected ADC value if negative – the gain correction

factor is computed assuming positive numbers, with sign restoration afterward.

#2 MSB

#2 LSB

Also take absolute value of the gain correction word if negative.

AGain MSB

AGain LSB

3. Multiply by Gain Correction Word. If in DIFFERENTIAL mode, there are two gain

correction values: one for positive ADC values, another for negative ADC values.

Based on the sign of #2, use the appropriate Gain Correction Word.

#2 MSB

#2 LSB

AGain MSB

AGain LSB

4. Round the result and discard the least significant two bytes (this is equivalent to

dividing by 216).

0x00

0x80

0x00

#4 MSB

#4 LSB

5. Determine sign of the gain correction factor using the sign bits from step #2. If the

offset corrected ADC value AND the gain correction word have the same sign, then

the factor is positive and is left unchanged. If they have differing signs, then the factor

is negative and should be multiplied by -1.

#5 MSB

#5 LSB

Z8F021ASH020SC 数据表(PDF) 140 Page - Zilog, Inc.

Z8F021ASH020SC 数据表(HTML) 140 Page - Zilog, Inc.

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