VREF (V) 2.5 0 0.5 1.0 1.5 2.0 LINE ARIT" />
參數(shù)資料
型號(hào): AD7266BSUZ
廠商: Analog Devices Inc
文件頁數(shù): 3/29頁
文件大?。?/td> 0K
描述: IC ADC 12BIT 3CH 2MSPS 32-TQFP
設(shè)計(jì)資源: AD7266 SAR ADC in DC-Coupled Differential and Single-Ended Appls (CN0039)
標(biāo)準(zhǔn)包裝: 1
位數(shù): 12
采樣率(每秒): 2M
數(shù)據(jù)接口: DSP,MICROWIRE?,QSPI?,串行,SPI?
轉(zhuǎn)換器數(shù)目: 2
功率耗散(最大): 33.6mW
電壓電源: 模擬和數(shù)字
工作溫度: -40°C ~ 125°C
安裝類型: 表面貼裝
封裝/外殼: 32-TQFP
供應(yīng)商設(shè)備封裝: 32-TQFP(7x7)
包裝: 托盤
輸入數(shù)目和類型: 12 個(gè)單端,單極;6 個(gè)差分,單極;6 個(gè)偽差分,單極
產(chǎn)品目錄頁面: 777 (CN2011-ZH PDF)
AD7266
Rev. B | Page 10 of 28
04603-009
VREF (V)
2.5
0
0.5
1.0
1.5
2.0
LINE
ARITY
E
RROR
(LS
B
)
1.0
0.6
0.8
0.2
0.4
–0.2
0
–0.6
–0.4
–1.0
–0.8
VDD = 3V/5V
DIFFERENTIAL MODE
POSITIVE INL
POSITIVE DNL
NEGATIVE DNL
NEGATIVE INL
Figure 10. Linearity Error vs. VREF
04603-010
VREF (V)
5.0
0
0.5
1.0
1.5
2.0
2.5
3.0
3.5
4.0
4.5
E
FFE
CTIV
E
NUMBE
R
OF
BITS
12.0
11.0
11.5
10.0
10.5
9.0
9.5
8.0
7.5
8.5
7.0
VDD = 5V
DIFFERENTIAL MODE
VDD = 3V
DIFFERENTIAL MODE
VDD = 3V
SINGLE-ENDED MODE
VDD = 5V
SINGLE-ENDED MODE
Figure 11. Effective Number of Bits vs. VREF
04603-011
CURRENT LOAD (
μA)
200
0
20
40
60
80
100
120
140
160
180
V
RE
F
(V
)
2.5010
2.5000
2.5005
2.4995
2.4990
2.4985
2.4980
Figure 12. VREF vs. Reference Output Current Drive
04603-012
CODE
2046
2047
2049
2048
2050
NO.
OF
OCCURRE
NCE
S
10000
8000
9000
6000
7000
4000
5000
2000
1000
3000
0
10000
CODES
DIFFERENTIAL
MODE
INTERNAL
REFERENCE
Figure 13. Histogram of Codes for 10k Samples in Differential Mode
04603-042
CODE
2046
2047
2048
2049
2050
NO.
OF
OCCURRE
NCE
S
10000
9000
8000
7000
6000
5000
4000
3000
2000
1000
0
9984
CODES
SINGLE-ENDED
MODE
INTERNAL
REFERENCE
5 CODES
11 CODES
Figure 14. Histogram of Codes for 10k Samples in Single-Ended Mode
04603-011
RIPPLE FREQUENCY (kHz)
1200
0
200
400
600
800
1000
CMRR
(dB)
–60
–65
–70
–75
–80
–85
–95
–90
–100
DIFFERENTIAL MODE
VDD = 3V/5V
Figure 15. CMRR vs. Common-Mode Ripple Frequency
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