參數(shù)資料
型號(hào)： AD9948KCPZRL
廠商： ANALOG DEVICES INC
元件分類： 消費(fèi)家電
英文描述： 10-Bit CCD Signal Processor with Precision Timing⑩ Core
中文描述： SPECIALTY CONSUMER CIRCUIT, QCC40
封裝： 6 X 6 MM, MO-220-VJJD-2, LFCSP-40
文件頁數(shù)： 1/28頁
文件大小： 436K
代理商： AD9948KCPZRL
REV. 0
Information furnished by Analog Devices is believed to be accurate and
reliable. However, no responsibility is assumed by Analog Devices for its
use, nor for any infringements of patents or other rights of third parties that
may result from its use. No license is granted by implication or otherwise
under any patent or patent rights of Analog Devices. Trademarks and
registered trademarks are the property of their respective companies.
One Technology Way, P.O. Box 9106, Norwood, MA 02062-9106, U.S.A.
Tel: 781/329-4700
Fax: 781/326-8703
2003 Analog Devices, Inc. All rights reserved.
www.analog.com
AD9948
10-Bit CCD Signal Processor with
Precision Timing
Core
FUNCTIONAL BLOCK DIAGRAM
CLAMP
DOUT
CCDIN
REFT REFB
INTERNAL
REGISTERS
6dB TO 42dB
SYNC
GENERATOR
SDATA
SCK
SL
HBLK
10
VGA
AD9948
PRECISION
TIMING
CORE
10-BIT
ADC
V
REF
INTERNAL
CLOCKS
PxGA
CDS
HORIZONTAL
DRIVERS
4
RG
H1–H4
HD
VD
CLI
CLP/PBLK
0dB TO 18dB
FEATURES
Correlated Double Sampler (CDS)
0 dB to 18 dB Pixel Gain Amplifier (PxGA
)
6 dB to 42 dB 10-Bit Variable Gain Amplifier (VGA)
10-Bit 25 MSPS A/D Converter
Black Level Clamp with Variable Level Control
Complete On-Chip Timing Driver
Precision Timing Core with 800 ps Resolution
On-Chip 3 V Horizontal and RG Drivers
40-Lead LFCSP Package
APPLICATIONS
Digital Still Cameras
High Speed Digital Imaging Applications
GENERAL DESCRIPTION
The AD9948 is a highly integrated CCD signal processor for
digital still camera applications. Specified at pixel rates of up to
25 MHz, the AD9948 consists of a complete analog front end
with A/D conversion, combined with a programmable timing
driver. The Precision Timing core allows adjustment of high
speed clocks with 800 ps resolution.
The analog front end includes black level clamping, CDS, PxGA,
VGA, and a 25 MHz 10-bit A/D converter. The timing driver
provides the high speed CCD clock drivers for RG and H1–H4.
Operation is programmed using a 3-wire serial interface.
Packaged in a space-saving 40-lead LFCSP package, the
AD9948 is specified over an operating temperature range of
–20
°
C to +85
°
C.
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