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CIS/CCD AFE. WM8259 Datasheet

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CIS/CCD AFE. WM8259 Datasheet






WM8259 AFE. Datasheet pdf. Equivalent




WM8259 AFE. Datasheet pdf. Equivalent





Part

WM8259

Description

Single Channel 16-Bit CIS/CCD AFE



Feature


w WM8259 Single Channel 16-bit CIS/CCD AFE with 4-bit Wide Output DESCRIPTIO N The WM8259 is a 16-bit analogue front end/digitiser IC which processes and d igitises the analogue output signals fr om CCD sensors or Contact Image Sensors (CIS) at pixel sample rates of up to 3 MSPS. The device has two selectable vid eo input pins and one complete analogue signal processing.
Manufacture

Wolfson

Datasheet
Download WM8259 Datasheet


Wolfson WM8259

WM8259; channel containing Reset Level Clamping , Correlated Double Sampling, Programma ble Gain and Offset adjust functions. I nternal multiplexers allow fast switchi ng of offset and gain for lineby-line c olour processing. The output from this channel is time multiplexed into a high -speed 16-bit Analogue to Digital Conve rter. The digital output data is availa ble in 4-bit wide .


Wolfson WM8259

multiplexed format. An internal 4-bit DA C is supplied for internal reference le vel generation. This may be used during CDS to reference CIS signals or during Reset Level Clamping to clamp CCD sign als. An external reference level may al so be supplied. ADC references are gene rated internally, ensuring optimum perf ormance from the device. The device use s an analogue supp.


Wolfson WM8259

ly voltage of 3.3V and a digital interfa ce supply of between 2.5V and 3.3V. The WM8259 typically only consumes 132mW w hen operating from a single 3.3V supply . BLOCK DIAGRAM FEATURES • 16-bit AD C • 3MSPS conversion rate • Low pow er - 132mW typical • 3.3V single supp ly or 3.3V/2.5V dual supply operation Single channel operation, selectable inputs • Correlated double .

Part

WM8259

Description

Single Channel 16-Bit CIS/CCD AFE



Feature


w WM8259 Single Channel 16-bit CIS/CCD AFE with 4-bit Wide Output DESCRIPTIO N The WM8259 is a 16-bit analogue front end/digitiser IC which processes and d igitises the analogue output signals fr om CCD sensors or Contact Image Sensors (CIS) at pixel sample rates of up to 3 MSPS. The device has two selectable vid eo input pins and one complete analogue signal processing.
Manufacture

Wolfson

Datasheet
Download WM8259 Datasheet




 WM8259
w
WM8259
Single Channel 16-bit CIS/CCD AFE with 4-bit Wide Output
DESCRIPTION
The WM8259 is a 16-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 3MSPS.
The device has two selectable video input pins and one
complete analogue signal processing channel containing
Reset Level Clamping, Correlated Double Sampling,
Programmable Gain and Offset adjust functions. Internal
multiplexers allow fast switching of offset and gain for line-
by-line colour processing. The output from this channel is
time multiplexed into a high-speed 16-bit Analogue to Digital
Converter. The digital output data is available in 4-bit wide
multiplexed format.
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. An external reference level may also be supplied.
ADC references are generated internally, ensuring optimum
performance from the device.
The device uses an analogue supply voltage of 3.3V and a
digital interface supply of between 2.5V and 3.3V. The
WM8259 typically only consumes 132mW when operating
from a single 3.3V supply.
BLOCK DIAGRAM
FEATURES
16-bit ADC
3MSPS conversion rate
Low power - 132mW typical
3.3V single supply or 3.3V/2.5V dual supply operation
Single channel operation, selectable inputs
Correlated double sampling
Programmable gain (8-bit resolution)
Programmable offset adjust (8-bit resolution)
Programmable clamp voltage
4-bit wide multiplexed data output format
Internally generated voltage references
20-lead SSOP package
Serial control interface
APPLICATIONS
Flatbed and sheetfeed scanners
USB compatible scanners
Multi-function peripherals
High-performance CCD sensor interface
WOLFSON MICROELECTRONICS plc
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Production Data, April 2007, Rev 4.2
Copyright ©2007 Wolfson Microelectronics plc




 WM8259
WM8259
Production Data
TABLE OF CONTENTS
DESCRIPTION .......................................................................................................1
FEATURES.............................................................................................................1
APPLICATIONS .....................................................................................................1
BLOCK DIAGRAM .................................................................................................1
PIN CONFIGURATION...........................................................................................3
ORDERING INFORMATION ..................................................................................3
PIN DESCRIPTION ................................................................................................4
ABSOLUTE MAXIMUM RATINGS.........................................................................5
RECOMMENDED OPERATING CONDITIONS .....................................................5
ELECTRICAL CHARACTERISTICS ......................................................................6
INPUT VIDEO SAMPLING .....................................................................................8
OUTPUT DATA TIMING.........................................................................................9
SERIAL INTERFACE..............................................................................................9
DEVICE DESCRIPTION.......................................................................................10
INTRODUCTION ..................................................................................................10
INPUT SAMPLING ...............................................................................................10
RESET LEVEL CLAMPING (RLC) .......................................................................10
CDS/NON-CDS PROCESSING............................................................................11
OFFSET ADJUST AND PROGRAMMABLE GAIN...............................................12
ADC INPUT BLACK LEVEL ADJUST...................................................................13
OVERALL SIGNAL FLOW SUMMARY ................................................................13
CALCULATING OUTPUT FOR ANY GIVEN INPUT ............................................13
OUTPUT DATA FORMAT ....................................................................................14
CONTROL INTERFACE.......................................................................................15
TIMING REQUIREMENTS ...................................................................................15
PROGRAMMABLE VSMP DETECT CIRCUIT .....................................................16
REFERENCES .....................................................................................................17
POWER SUPPLY.................................................................................................17
POWER MANAGEMENT .....................................................................................17
OPERATING MODES ..........................................................................................17
OPERATING MODE TIMING DIAGRAMS ...........................................................18
DEVICE CONFIGURATION .................................................................................20
REGISTER MAP...................................................................................................20
REGISTER MAP DESCRIPTION .........................................................................21
RECOMMENDED EXTERNAL COMPONENTS ..................................................24
PACKAGE DIMENSIONS ....................................................................................25
IMPORTANT NOTICE ..........................................................................................26
ADDRESS: ...........................................................................................................26
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PD Rev 4.2 April 2007
2




 WM8259
WM8259
PIN CONFIGURATION
AGND2 1
DVDD1 2
VSMP 3
MCLK 4
DGND 5
SEN 6
DVDD2 7
SDI 8
SCK 9
OP[0] 10
WM8259
20 VINP1
19 VINP2
18 VRLC/VBIAS
17 VRT
16 VRB
15 AGND1
14 AVDD
13 OP[3]/SDO
12 OP[2]
11 OP[1]
Production Data
ORDERING INFORMATION
ORDER CODE
WM8259SCDS/V
TEMPERATURE
RANGE
0 to 70oC
WM8259SCDS/RV
0 to 70oC
Note:
Reel quantity = 2,000
PACKAGE
20-lead SSOP
(Pb-free, drybagged)
20-lead SSOP
(Pb-free, drybagged, tape
and reel)
MOISTURE
PEAK SOLDERING
SENSITIVITY LEVEL TEMPERATURE
MSL3
260oC
MSL3
260oC
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PD Rev 4.2 April 2007
3






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