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參數(shù)資料
| 型號： | WM8181 |
| 廠商： | Wolfson Microelectronics |
| 英文描述： | 12-bit 2MSPS Serial Output CIS/CCD Digitiser |
| 中文描述： | 12位2MSPS串行輸出獨(dú)聯(lián)體/防治荒漠化公約數(shù)字化儀 |
| 文件頁數(shù)： | 10/14頁 |
| 文件大小： | 150K |
| 代理商： | WM8181 |
WM8181
Advanced Information
WOLFSON MICROELECTRONICS LTD
AI Rev 3.0 January 2000
10
SYSTEM
ASIC
CIS
SENSOR
V
OUT
WM8181
VSMP
DOUT
MCLK
VINP
VINM
CLAMP
VREFIN
VRT
VRB
EXACT CIRCUITRY
MAY VARY
DEPENDING ON
SENSOR USED
BLACK
REFERENCE
LEVEL
SET VOLTAGE TO MATCH V
FROM
SENSOR OR TIE TO AVDD TO SET
FULL-SCALE INPUT TO 1.5V
Figure 6 d.c. Coupled Positive Video
Some of the newer CIS devices have a reference voltage that corresponds closely to the black level.
In most cases this reference voltage cannot be applied directly to the VINM pin because the black
video output can go below this value and will be outside the range of the ADC. To overcome this,
VINM should be driven from a voltage that is slightly more negative than the CIS reference voltage.
This is shown in Figure 7. The input current to VINM is small but care should be taken to ensure that
R2 and R3 do not load the CIS reference circuit.
SYSTEM
ASIC
CIS
SENSOR
V
OUT
WM8181
VSMP
DOUT
MCLK
VINP
VINM
CLAMP
V
REF
VREFIN
VRT
VRB
EXACT CIRCUITRY
MAY VARY
DEPENDING ON
SENSOR USED
SET VOLTAGE TO MATCH V
FROM
SENSOR OR TIE TO AVDD TO SET
FULL-SCALE INPUT TO 1.5V
Figure 7 CIS with Reference Voltage
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| WM8190 | 制造商:WOLFSON 制造商全稱:WOLFSON 功能描述:(8+6) Bit Output 14-bit CIS/CCD AFE/Digitiser |
| WM8191 | 制造商:WOLFSON 制造商全稱:WOLFSON 功能描述:14-bit 6MSPS CIS/CCD Analogue Front End/Digitiser |
| WM8192 | 制造商:WOLFSON 制造商全稱:WOLFSON 功能描述:(8+8) Bit Output 16-bit CIS/CCD AFE/Digitiser |
| WM8195 | 制造商:WOLFSON 制造商全稱:WOLFSON 功能描述:14-bit 12MSPS CIS/CCD Analogue Front End/Digitiser |
| WM8195_05 | 制造商:WOLFSON 制造商全稱:WOLFSON 功能描述:14-bit 12MSPS CIS/CCD Analogue Front End/Digitiser |
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