μPD78F921x ONLY) User’s Manual U16994EJ6V0UD 171 9.5 How to Read A/D Converte" />
參數(shù)資料
型號： UPD78F9212CS-CAB-A
廠商： Renesas Electronics America
文件頁數(shù)： 83/175頁
文件大?。?/td> 0K
描述： MCU 8BIT 4KB FLASH 16PIN
標(biāo)準(zhǔn)包裝： 400
系列： 78K0S/Kx1+
核心處理器： 78K0S
芯體尺寸： 8-位
速度： 10MHz
外圍設(shè)備： LVD，POR，PWM，WDT
輸入/輸出數(shù)： 13
程序存儲器容量： 4KB（4K x 8）
程序存儲器類型： 閃存
RAM 容量： 128 x 8
電壓 - 電源 (Vcc/Vdd)： 2 V ~ 5.5 V
數(shù)據(jù)轉(zhuǎn)換器： A/D 4x10b
振蕩器型： 內(nèi)部
工作溫度： -40°C ~ 85°C
封裝/外殼： 16-DIP（0.300"，7.62mm）
包裝： 托盤
CHAPTER 9 A/D CONVERTER (
μPD78F921x ONLY)
User’s Manual U16994EJ6V0UD
171
9.5
How to Read A/D Converter Characteristics Table
Here, special terms unique to the A/D converter are explained.
(1) Resolution
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
10 = 1/1024
= 0.098%FSR
Accuracy has no relation to resolution, but is determined by overall error.
(2) 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.
(3) Quantization error
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.
Figure 9-13. Overall Error
Figure 9-14. Quantization Error
Ideal line
0……0
1……1
Digital
output
Overall
error
Analog input
VDD
0
0……0
1……1
Digital
output
Quantization error
1/2LSB
Analog input
0
VDD
(4) Zero-scale error
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.
相關(guān)PDF資料
PDF描述
UPD78F9222CS-CAC-A MCU 8BIT 4KB FLASH 20PIN
UPD78F9234CS-CAA-A MCU 8BIT 8KB FLASH 30PIN
UPD78F9418AGC-8BT-A IC MCU 8BIT 32K FLASH 80QFP
USB-232-DIL IC USB ASYNC SRL UART 28-DIL
USB-DAQ-DIL IC SYSTEM DATA LOGGER 28-DIL
相關(guān)代理商/技術(shù)參數(shù)
參數(shù)描述
UPD78F9212FH(T)-2A2-A 制造商:Renesas Electronics Corporation 功能描述:
UPD78F9212FH-2A2-A 制造商:Renesas Electronics Corporation 功能描述:
UPD78F9212FH-2A2-E1-A 制造商:Renesas Electronics Corporation 功能描述:
UPD78F9212GR(T)-JJG 制造商:Renesas Electronics Corporation 功能描述: 制造商:NEC Electronics Corporation 功能描述: 制造商:NEC Electronics Corporation 功能描述:8-BIT, FLASH, 10 MHz, MICROCONTROLLER, PDSO16
UPD78F9212GR(T)-JJG-A 制造商:NEC Electronics Corporation 功能描述:8BIT MCU 4K FLASH 128B RAM 78F9212
發(fā)布緊急采購，3分鐘左右您將得到回復(fù)。

采購需求

(若只采購一條型號，填寫一行即可)

發(fā)布成功！您可以繼續(xù)發(fā)布采購。也可以進(jìn)入我的后臺，查看報價

發(fā)布成功！您可以繼續(xù)發(fā)布采購。也可以進(jìn)入我的后臺，查看報價

*型號 *數(shù)量 廠商 批號 封裝
添加更多采購

我的聯(lián)系方式

*
*
*