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參數資料
| 型號： | WM8148 |
| 廠商： | Wolfson Microelectronics |
| 英文描述： | TVS BIDIRECT 400W 5.0V SMA |
| 中文描述： | 12-bit/12MSPS防治荒漠化公約/獨聯體模擬前端/數字轉換器 |
| 文件頁數： | 1/43頁 |
| 文件大小： | 491K |
| 代理商： | WM8148 |
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WM8148
12-bit/12MSPS CCD/CIS Analogue Front End/Digitiser
Production Data, April 1999, Rev 4.0
WOLFSON MICROELECTRONICS LTD
Lutton Court, Bernard Terrace, Edinburgh, EH8 9NX, UK
Tel: +44 (0) 131 667 9386
Fax: +44 (0) 131 667 5176
Email: sales@wolfson.co.uk
http://www.wolfson.co.uk
Production Data
contain final
specifications current on publication date.
Supply of products conforms to Wolfson
Microelectronics' Terms and Conditions.
1999 Wolfson Microelectronics Ltd
.
DESCRIPTION
The WM8148 is a 12-bit, 12MSPS analogue front end/
digitiser IC, which interfaces to colour or monochrome linear
array CCDs or contact image sensors (CIS). The device
includes all the signal conditioning circuitry required to
process the analogue signals from the CCD or CIS prior to
the internal ADC.
Three signal-processing channels are included in the
device. Each channel features reset level clamping,
correlated double sampling (CDS), offset correction and
programmable gain amplification (PGA). The output signal
from each channel is then multiplexed into a high
performance 12-bit analogue to digital converter (ADC).
The reset level clamp and/or CDS functions can be selected
or bypassed depending on the application.
The WM8148 can be operated in several modes. The
operational mode of the device, including the sampling
scheme and power management is programmed via the
serial/parallel control interface.
Output data is presented in either 12-bit parallel or byte-
wide (8+4-bit) format.
FEATURES
Correlated double sampling
Programmable gain amplifier
Programmable input clamp voltage
Offset correction
12-bit, 12MSPS ADC
Internal voltage reference
12-bit or 8+4 bit data output mode
Single 5V supply or 5V analogue/3.3V digital supply
Programmable sample timing
Control interface compatible with previous Wolfson
AFEs
48-pin TQFP package
APPLICATIONS
Flatbed scanners
Document scanners
Multi-function peripherals (MFPs)
Colour copiers
Character recognition systems
Linear array CCDs
Contact image sensors (CIS)
BLOCK DIAGRAM
RINP (36)
GINP (37)
VRLC (33)
MUX
TIMING CONTROL
CSCONFIGURABLE
(45) SDI/DNA
(46) SCK/RNW
(47) SEN/STB
(42) NRESET
(44) SDO
(43) OEB
OP[11:0]
(9-12,14-21)
VREF/BIAS
VRT
(31)
BINP (39)
12-BIT
ADC
12/8
BIT
MUX
(48) PNS
(34) OVRD
OFFSET
DAC
+
+
OFFSET
DAC
+
+
OFFSET
DAC
+
+
AVDD 1- 4
(41,28,27,3)
DVDD1-2
(1,13)
VSMP
(7)
PGA
PGA
PGA
4
8
8
8
6
6
6
CDS
RLC
CDS
RLC
CDS
RLC
(8,24,4,26)
DGND1 - 4
(35,40,30,25,6)
AGND1 - 5
MCLK
(5)
RLC
(2)
VRB
(29)
VRX
(32)
± FULL
SCALE 2
_
.
± FULL
SCALE 2
_
.
± FULL
SCALE 2
_
.
RLC
DAC
CL R
S
V
S
WM8148
相關PDF資料 |
PDF描述 |
|---|---|
| WM8150 | DIODE TVS 400W 5V UNI DIR |
| WM8150CDS | SINGLE CHANNEL 12 BIT CIS/CCD AFE WITH 4 BIT WIDE OUTPUT |
| WM8150CDSR | SINGLE CHANNEL 12 BIT CIS/CCD AFE WITH 4 BIT WIDE OUTPUT |
| WM8170 | 5.0 VOLT BI-DIRECTIONAL TRANSIENT VOLTAGE SUPPRESSOR |
| WM8181 | 12-bit 2MSPS Serial Output CIS/CCD Digitiser |
相關代理商/技術參數 |
參數描述 |
|---|---|
| WM8150 | 制造商:WOLFSON 制造商全稱:WOLFSON 功能描述:SINGLE CHANNEL 12 BIT CIS/CCD AFE WITH 4 BIT WIDE OUTPUT |
| WM8150_05 | 制造商:WOLFSON 制造商全稱:WOLFSON 功能描述:Single Channel 12-bit CIS/CCD AFE with 4-bit Wide Output |
| WM8150CDS | 制造商:WOLFSON 制造商全稱:WOLFSON 功能描述:SINGLE CHANNEL 12 BIT CIS/CCD AFE WITH 4 BIT WIDE OUTPUT |
| WM8150CDS/R | 制造商:WOLFSON 制造商全稱:WOLFSON 功能描述:Single Channel 12-bit CIS/CCD AFE with 4-bit Wide Output |
| WM8150CDSR | 制造商:WOLFSON 制造商全稱:WOLFSON 功能描述:SINGLE CHANNEL 12 BIT CIS/CCD AFE WITH 4 BIT WIDE OUTPUT |
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