UPD78F0988AGC-8BS Renesas Electronics America, UPD78F0988AGC-8BS Datasheet - Page 221

• Manufacturer Part Number: UPD78F0988AGC-8BS
• Manufacturer: Renesas Electronics America

Specifications of UPD78F0988AGC-8BS

• Lead Free Status / Rohs Status: Supplier Unconfirmed

11.6 How to Read A/D Converter Characteristics Tables
This section describes the technical terms peculiar to the A/D converter.
(1) Resolution
(2) Overall error
(3) Quantization error
This is the minimum identifiable analog input voltage. The ratio of 1 digital output bit to an analog input voltage
is said to be 1 LSB (Least Significant Bit). The ratio of the full scale to 1 LSB is expressed in %FSR (Full
Scale Range).
Where the resolution is 10 bits,
1 LSB = 1/2
The accuracy does not depend on the resolution and is determined by the overall error.
This is the maximum difference between actually measured and theoretical values.
The overall error indicates a zero-scale error and full-scale error, an integral linearity error, differential linearity
error, and a combination of these errors.
Note that the overall error specified in the characteristics table does not include the quantization error.
This is an error of 1/2 LSB that inevitably occurs when an analog value is converted into a digital value. Since
the A/D converter converts an analog input voltage in the range of 1/2 LSB into the same digital code, a
quantization error is unavoidable.
This error is not included in the overall error, zero-scale error, full-scale error, integral linearity error, and
differential linearity error specified in the characteristics table.
= 0.098% FSR
10
= 1/1024
CHAPTER 11 A/D CONVERTER
User’s Manual U13029EJ7V1UD
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