參數(shù)資料
型號(hào): ADUC814BRU
廠商: Analog Devices Inc
文件頁(yè)數(shù): 7/72頁(yè)
文件大?。?/td> 0K
描述: IC ADC 12BIT W/FLASH MCU 28TSSOP
標(biāo)準(zhǔn)包裝: 50
系列: MicroConverter® ADuC8xx
核心處理器: 8052
芯體尺寸: 8-位
速度: 16.78MHz
連通性: I²C,SPI,UART/USART
外圍設(shè)備: POR,PSM,溫度傳感器,WDT
輸入/輸出數(shù): 17
程序存儲(chǔ)器容量: 8KB(8K x 8)
程序存儲(chǔ)器類型: 閃存
EEPROM 大?。?/td> 640 x 8
RAM 容量: 256 x 8
電壓 - 電源 (Vcc/Vdd): 2.7 V ~ 5.5 V
數(shù)據(jù)轉(zhuǎn)換器: A/D 6x12b; D/A 2x12b
振蕩器型: 內(nèi)部
工作溫度: -40°C ~ 125°C
封裝/外殼: 28-TSSOP(0.173",4.40mm 寬)
包裝: 管件
配用: EVAL-ADUC814QSZ-ND - KIT DEV FOR ADUC814 MICROCONVRTR
ADuC814
Rev. A | Page 15 of 72
Figure 13 and Figure 14 show typical FFT plots for the ADuC814.
These plots were generated using an external clock input via
P3.5 to achieve coherent sampling. The ADC is using its internal
reference (2.5 V) sampling a full-scale, 10 kHz sine wave test
tone input at a sampling rate of 149.79 kHz. The resultant FFTs
shown at 5 V and 3 V supplies illustrate an excellent 100 dB
noise floor, a 71 dB signal-to-noise ratio (SNR), and a THD
greater than 80 dB.
20
0
–20
–40
–60
–80
–100
–120
–140
–160
dBs
20
FREQUENCY (kHz)
10
070
60
50
40
30
02748-A
-020
AVDD/DVDD = 5V
fS = 149.79kHz
fIN = 9.910kHz
SNR = 71.3dB
THD = –88.0dB
ENOB = 11.6
Figure 13. ADuC814 Dynamic Performance at VDD = 5 V
20
0
–20
–40
–60
–80
–100
–120
–140
–160
dBs
20
FREQUENCY (kHz)
10
070
60
50
40
30
02748-A
-021
AVDD/DVDD = 3V
fS = 149.79kHz
fIN = 9.910kHz
SNR = 71.3dB
THD = –88.0dB
ENOB = 11.6
Figure 14. ADuC814 Dynamic Performance at VDD = 3 V
Figure 15 and Figure 16 show typical dynamic performance
versus external reference voltages. Again excellent ac performance
can be observed in both plots with some roll-off being observed
as VREF falls below 1 V.
EXTERNAL REFERENCE (V)
50
0.5
S
NR
(dBs
)
1.0
2.0
2.5
5.0
55
1.5
60
65
70
75
80
THD
(dBs
)
–100
–95
–90
–85
–80
–75
–70
AVDD/DVDD = 5V
fS = 152kHz
SNR
THD
02748-A
-022
Figure 15. Typical Dynamic Performance vs. VREF, VDD = 5 V
EXTERNAL REFERENCE (V)
S
NR
(dBs
)
80
75
65
50
70
55
AVDD/DVDD = 3V
f
S = 152kHz
0.5
1.5
2.5
THD
(dBs
)
SNR
THD
60
–70
–75
–85
–100
–80
–95
–90
1.0
2.0
3.0
02748-A
-023
Figure 16. Typical Dynamic Performance vs. VREF, VDD = 3 V
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