UPD78F9202MA-CAC-A Renesas Electronics America, UPD78F9202MA-CAC-A Datasheet - Page 173
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UPD78F9202MA-CAC-A
Manufacturer Part Number
UPD78F9202MA-CAC-A
Description
MCU 8BIT 4KB FLASH 128B RAM
Manufacturer
Renesas Electronics America
Series
78K0S/Kx1+r
Datasheet
1.UPD78F9500MA-CAC-A.pdf
(342 pages)
Specifications of UPD78F9202MA-CAC-A
Core Processor
78K0S
Core Size
8-Bit
Speed
10MHz
Peripherals
LVD, POR, PWM, WDT
Number Of I /o
7
Program Memory Size
4KB (4K x 8)
Program Memory Type
FLASH
Ram Size
128 x 8
Voltage - Supply (vcc/vdd)
2 V ~ 5.5 V
Data Converters
A/D 4x10b
Oscillator Type
Internal
Operating Temperature
-40°C ~ 85°C
Package / Case
*
Lead Free Status / RoHS Status
Lead free / RoHS Compliant
Eeprom Size
-
Connectivity
-
Available stocks
Company
Part Number
Manufacturer
Quantity
Price
Part Number:
UPD78F9202MA-CAC-A
Manufacturer:
RENESAS/瑞萨
Quantity:
20 000
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9.5
(1) Resolution
(2) Overall error
(3) Quantization error
(4) Zero-scale error
Here, special terms unique to the A/D converter are explained.
This is the minimum analog input voltage that can be identified. That is, the percentage of the analog input
voltage per bit of digital output is called 1LSB (Least Significant Bit). The percentage of 1LSB with respect to the
full scale is expressed by %FSR (Full Scale Range).
1LSB is as follows when the resolution is 10 bits.
1LSB = 1/2
Accuracy has no relation to resolution, but is determined by overall error.
This shows the maximum error value between the actual measured value and the theoretical value.
Zero-scale error, full-scale error, integral linearity error, and differential linearity errors that are combinations of
these express the overall error.
Note that the quantization error is not included in the overall error in the characteristics table.
When analog values are converted to digital values, a 1/2LSB error naturally occurs. In an A/D converter, an
analog input voltage in a range of 1/2LSB is converted to the same digital code, so a quantization error cannot
be avoided.
Note that the quantization error is not included in the overall error, zero-scale error, full-scale error, integral
linearity error, and differential linearity error in the characteristics table.
This shows the difference between the actual measurement value of the analog input voltage and the theoretical
value (1/2LSB) when the digital output changes from 0......000 to 0......001.
If the actual measurement value is greater than the theoretical value, it shows the difference between the actual
measurement value of the analog input voltage and the theoretical value (3/2LSB) when the digital output
changes from 0……001 to 0……010.
How to Read A/D Converter Characteristics Table
1 …… 1
0 …… 0
= 0.098%FSR
10
Figure 9-13. Overall Error
0
= 1/1024
Ideal line
Analog input
CHAPTER 9 A/D CONVERTER ( PD78F920x ONLY)
Overall
error
User’s Manual U18172EJ3V0UD
V
DD
1 …… 1
0 …… 0
Figure 9-14. Quantization Error
0
1/2LSB
Analog input
1/2LSB
Quantization error
V
DD
171
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