参数资料
型号: ADUC814ARU
厂商: Analog Devices Inc
文件页数: 6/72页
文件大小: 0K
描述: IC ADC 12BIT W/FLASH MCU 28TSSOP
标准包装: 50
系列: MicroConverter® ADuC8xx
核心处理器: 8052
芯体尺寸: 8-位
速度: 16.78MHz
连通性: I²C,SPI,UART/USART
外围设备: POR,PSM,温度传感器,WDT
输入/输出数: 17
程序存储器容量: 8KB(8K x 8)
程序存储器类型: 闪存
EEPROM 大小: 640 x 8
RAM 容量: 256 x 8
电压 - 电源 (Vcc/Vdd): 2.7 V ~ 5.5 V
数据转换器: A/D 6x12b; D/A 2x12b
振荡器型: 内部
工作温度: -40°C ~ 125°C
封装/外壳: 28-TSSOP(0.173",4.40mm 宽)
包装: 管件
配用: EVAL-ADUC814QSZ-ND - KIT DEV FOR ADUC814 MICROCONVRTR
ADuC814
Rev. A | Page 14 of 72
ADC CODES
LSBs
0
–0.25
–0.20
–0.15
–0.10
–0.50
0
0.05
0.10
0.30
0.25
0.20
0.15
1023
511
3583
3071
2559
2047
1535
4095
02748-A
-014
AVDD/DVDD = 5V
fS = 152kHz
Figure 7. Typical DNL Error, VDD = 5 V
ADC CODES
LSBs
0
–0.25
–0.20
–0.15
–0.10
–0.50
0
0.05
0.10
0.30
0.25
0.20
0.15
1023
511
3583
3071
2559
2047
1535
4095
02748-A
-015
AVDD/DVDD = 3V
fS = 152kHz
Figure 8. Typical DNL Error, VDD = 3 V
Figure 9 and Figure 10 show the variation in worst-case positive
(WCP) DNL and worst-case negative (WCN) DNL versus
external reference input voltage.
EXTERNAL REFERENCE (V)
–0.6
0.5
WCP
DNL
(LS
B
s
)
1.0
2.0
2.5
5.0
–0.4
1.5
–0.2
0
0.2
0.4
0.6
WCN
DNL
(LS
B
s
)
–0.4
–0.6
–0.2
0
0.2
0.4
0.6
AVDD /DVDD = 5V
fS = 152kHz
WCP DNL
WCN DNL
02748-A
-016
Figure 9. Typical Worst-Case DNL Error vs. VREF, VDD = 5 V
EXTERNAL REFERENCE (V)
WCP
DNL
(LS
B
s)
0.7
0.5
0.1
–0.5
–0.7
0.3
–0.3
AVDD/DVDD = 3V
f
S = 152kHz
0.5
1.0
1.5
2.0
2.5
3.0
WCN
DNL
(LS
B
s)
WCP DNL
WCN DNL
–0.1
0.7
0.5
0.1
–0.5
–0.7
0.3
–0.3
–0.1
02748-A-017
Figure 10. Typical Worst-Case DNL Error vs. VREF, VDD = 3 V
Figure 11 shows a histogram plot of 10,000 ADC conversion
results on a dc input with VDD = 5 V. The plot illustrates an
excellent code distribution pointing to the low noise
performance of the on-chip precision ADC.
CODE
817
818
819
820
821
10000
OCCURRENCE
8000
6000
4000
2000
0
02748-A-018
Figure 11. Code Histogram plot, VDD = 5 V
Figure 12 shows a histogram plot of 10,000 ADC conversion
results on a dc input for VDD = 3 V. The plot again illustrates a
very tight code distribution of 1 LSB with the majority of codes
appearing in one output bin.
CODE
10000
817
818
819
820
821
OCCURRE
NCE
8000
6000
4000
2000
0
9000
7000
5000
3000
1000
02748-A-019
Figure 12. Code Histogram Plot, VDD = 3 V
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