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XWM8170CFT/V Datasheet

  • XWM8170CFT/V

  • 3.3V Integrated Signal Processor for Area Array CCDs

  • 455.85KB

  • 41頁

  • WOLFSON

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WM8170
3.3V Integrated Signal Processor for Area Array CCDs
Product Preview Rev 1.0 March 2000
DESCRIPTION
The WM8170 is a 10-bit analogue front end/digitiser IC,
which processes and digitises the analogue output signals
from area array CCD sensors at pixel sample rates of up to
21MSPS.
The device contains input blanking, correlated double
sampling (CDS), programmable gain amplifier, black level
clamp, on-board voltage reference and a 10-bit, 21MSPS
ADC. Two auxiliary 8 bit DACs are provided which may be
used for bias voltage control or camera functions such as
auto-focus.
Fine black level adjustment is performed digitally after the
ADC. This digital adjustment will follow DC shifts in the video
input without introducing digital correction noise into the
image.
The WM8170 is designed to interface to a wide range of area
array CCDs and can operate at lower power for slower
sample rates by setting the reference bias current via an
external resistor connected to the ISET pin.
All signal timing within the device is derived from the CCD
clock signals. The WM8170 is controlled via a configurable
serial interface, which is compatible with all of Wolfson鈥?/div>
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imaging devices.
The user is able to control the device functions and monitor
on-chip register settings via the easy-to-use digital
management interface.
FEATURES
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10-bit, 21MSPS ADC
No missing codes guaranteed
Correlated double sampling
Programmable gain amplifier
Black level clamp
Input blanking
Two auxiliary 8-bit DACs
Power save mode
Serial or parallel control bus
Adjustable sample rate
User selectable sampling on rising or falling edge
of clocks
Single 3.3V power supply (3V minimum)
48-pin TQFP package
Standby mode I
CC
<10碌A(chǔ)
Power consumption typically 190mW at 12MHz,
270mW at 21MHz
APPLICATIONS
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Digital still cameras
Digital camcorders
PC cameras
Progressive scan CCDs
NTSC, PAL interline CCDs
BLOCK DIAGRAM
VRB VMID VRT
(15) (16) (14)
BLCENB
(27)
SHP SHD
(22) (21)
CVDD
(42)
AVDD[1-3] DVDD[1-4] DCLK
(10,11,20) (3,23,33,39) (38)
VCLP (12)
REFERENCE
CLPENB (24)
CLPSWB (25)
PIN (19)
DIN (18)
PBLK/HD (26)
Dual Mode Pin
ANALOGUE
BLACK
LEVEL
CLAMP
TIMING GENERATOR
DIGITAL
COMPARATOR
DIGITAL
BLACK
LEVEL
CLAMP
AND
FILTER
(8) PTDO
(31) OEB
CLAMP
CDS
S/H
PGA
10-BIT
ADC
HI-Z
DATA I/O
(1,4-7,44-48)
VOUT1 (40)
8-BIT
ADC
8-BIT
ADC
WM8170
CONFIGURABLE
SERIAL/PARALLEL
INTERFACE
(29) PNS
(36) SEN/STB
(37) SCK/RNW
(35) SDI/DNA
(32) NRESET
(34) SDO
(30) PDB/VD
Dual Mode Pin
VOUT2 (41)
BIAS
CIRCUIT
(43)
CGND
(9,17)
AGND[1-2]
(13)
ISET
(2,28)
DGND[1-2]
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
Product Preview
data sheets contain
specifications for products in the formative
phase of development. These products may
be changed or discontinued without notice.
漏
2000 Wolfson Microelectronics Ltd
.

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