參數(shù)資料
型號： WM8191
廠商： Wolfson Microelectronics
英文描述： TVS BI-DIR 6.0V 400W SMA
中文描述： 14位6MSPS獨聯(lián)體/防治荒漠化公約模擬前端/數(shù)字轉換器
文件頁數(shù)： 1/27頁
文件大?。?/td> 355K
代理商： WM8191
WM8191
14-bit 6MSPS CIS/CCD Analogue Front End/Digitiser
Advanced Information, April 2001, Rev 3.1
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
www.wolfsonmicro.com
Advanced Information
data sheets contain
preliminary data on new products in the
preproduction phase of development.
Supplementary data will be published at a
later date.
2001 Wolfson Microelectronics Ltd
.
DESCRIPTION
The WM8191 is a 14-bit analogue front end/digitiser IC
which processes and digitises the analogue output signals
from CCD sensors or Contact Image Sensors (CIS) at pixel
sample rates of up to 6MSPS.
The device includes three analogue signal processing
channels each of which contains Reset Level Clamping,
Correlated Double Sampling and Programmable Gain and
Offset adjust functions. Three multiplexers allow single
channel processing. The output from each of these
channels is time multiplexed into a single high-speed 14-bit
analogue-to-digital converter. The digital output data is
available in 14-bit parallel or 8/7/4-bit wide multiplexed
format, with no missing codes.
An internal 4-bit DAC is supplied for internal reference level
generation. This may be used during CDS to reference CIS
signals or during Reset Level Clamping to clamp CCD
signals. Alternatively an external reference level may be
applied. ADC references are generated internally, ensuring
optimum performance from the device.
Using an analogue supply voltage of 5V and a digital
interface supply of either 5V or 3.3V, the WM8191 typically
only consumes 250mW when operating from a single 5V
supply and less than 1
μ
A when in power down mode.
FEATURES
14-bit ADC
No missing codes guaranteed
6MSPS conversion rate
Low power – 250mW typical
5V single supply or 5V/3.3V dual supply operation
Single or 3 channel operation
Correlated double sampling
Programmable gain (8-bit resolution)
Programmable offset adjust (8-bit resolution)
Programmable clamp voltage
14-bit parallel or 8/7/4-bit wide multiplexed data output
formats
Internally generated voltage references
48-pin TQFP package
Serial or parallel control interface
APPLICATIONS
Flatbed and sheetfeed scanners
USB compatible scanners
Multi-function peripherals
High-performance CCD sensor interface
BLOCK DIAGRAM
M
U
X
RINP (8)
DATA
I/O
PORT
(12) SEN/STB
(14) SCK/RNW
VSMP
(15)
MCLK
(17)
VRLC/VBIAS
(2)
(13) SDI/DNA
(16) RLC/ACYC
(42) NRESET
TIMING CONTROL
CL
RLC
V
S
R
S
BINP (4)
GINP (6)
VRX
(1)
VRT
(48)
VREF/BIAS
(11) OEB
M
U
X
M
U
X
VRB
(47)
RLC
RLC
CDS
CDS
CDS
R
G
B
M
U
X
R
G
B
+
PGA
I/P SIGNAL
POLARITY
ADJUST
8
8
OFFSET
DAC
PGA
8
8
OFFSET
DAC
PGA
8
OFFSET
DAC
RLC
DAC
8
4
+
+
+
CONFIGURABLE
SERIAL/
PARALLEL
CONTROL
INTERFACE
14-
BIT
ADC
AVDD1-2
(43, 44)
(21) OP[0]
(22) OP[1]
(23) OP[2]
(26) OP[3]
(27) OP[4]
(28) OP[5]
(29) OP[6]
(31) OP[7]
(32) OP[8]
(33) OP[9]
(34) OP[10]
(37) OP[11]
(38) OP[12]
(39) OP[13]/SDO
+
+
I/P SIGNAL
POLARITY
ADJUST
I/P SIGNAL
POLARITY
ADJUST
WM8191
DVDD1-3
(10, 24, 35)
(18, 25, 30, 36, 40)
DGND1-5
(3, 5, 7, 9, 45, 46)
AGND1-6
相關PDF資料
PDF描述
WM8192 TVS UNIDIRECT 400W 6.5V SMA
WM8196 (8+8)BIT OUTPUT 16-BIT CIS/CCD AFE/DIGITISER
WM8199 20MSPS 16-bit CCD Digitiser
WM8199CDR TVS BIDIRECT 400W 60V SMA
WM8199CDS TVS UNIDIRECT 400W 64V SMA
相關代理商/技術參數(shù)
參數(shù)描述
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
WM8195SCFT/RV 功能描述:模數(shù)轉換器 - ADC 14Bit 12MSPS 3C AFE RoHS:否 制造商:Texas Instruments 通道數(shù)量:2 結構:Sigma-Delta 轉換速率:125 SPs to 8 KSPs 分辨率:24 bit 輸入類型:Differential 信噪比:107 dB 接口類型:SPI 工作電源電壓:1.7 V to 3.6 V, 2.7 V to 5.25 V 最大工作溫度:+ 85 C 安裝風格:SMD/SMT 封裝 / 箱體:VQFN-32
WM8195SCFT/V 功能描述:模數(shù)轉換器 - ADC 14Bit 12MSPS 3Ch AFE RoHS:否 制造商:Texas Instruments 通道數(shù)量:2 結構:Sigma-Delta 轉換速率:125 SPs to 8 KSPs 分辨率:24 bit 輸入類型:Differential 信噪比:107 dB 接口類型:SPI 工作電源電壓:1.7 V to 3.6 V, 2.7 V to 5.25 V 最大工作溫度:+ 85 C 安裝風格:SMD/SMT 封裝 / 箱體:VQFN-32
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