參數(shù)資料
型號: AD9848
廠商: Analog Devices, Inc.
英文描述: CCD Signal Processors with Integrated Timing Driver
中文描述: CCD信號處理器集成時序驅(qū)動
文件頁數(shù): 1/36頁
文件大?。?/td> 347K
代理商: AD9848
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.
a
AD9848/AD9849
Tel: 781/329-4700
Analog Devices, Inc., 2001
CCD Signal Processors with
Integrated Timing Driver
FUNCTIONAL BLOCK DIAGRAM
CLAMP
DOUT
CCDIN
PBLK
VRT
VRB
INTERNAL
REGISTERS
2dB TO 36dB
SYNC
GENERATOR
SDATA
SCK
SL
CLPOB
10 OR 12
VGA
AD9848/AD9849
4 6dB
PRECISION
TIMING
TM
CORE
ADC
VREF
CLAMP
INTERNAL
CLOCKS
PxGA
CDS
HORIZONTAL
DRIVERS
4
RG
H1–H4
HD
VD
CLI
CLPDM
FEATURES
AD9848: 10-Bit, 20 MHz Version
AD9849: 12-Bit, 30 MHz Version
Correlated Double Sampler (CDS)
–2 dB to +10 dB Pixel Gain Amplifier (PxGA
)
2 dB to 36 dB 10-Bit Variable Gain Amplifier (VGA)
10-Bit 20 MHz A/D Converter (AD9848)
12-Bit 30 MHz A/D Converter (AD9849)
Black Level Clamp with Variable Level Control
Complete On-Chip Timing Driver
Precision Timing
Core with 1 ns Resolution @ 20 MSPS
On-Chip 3 V Horizontal and RG Drivers (AD9848)
On-Chip 5 V Horizontal and RG Drivers (AD9849)
48-Lead LQFP Package
APPLICATIONS
Digital Still Cameras
PRODUCT DESCRIPTION
The AD9848 and AD9849 are highly integrated CCD signal pro-
cessors for digital still camera applications. Both include a complete
analog front end with A/D conversion, combined with a program-
mable timing driver. The
Precision Timing
core allows adjustment
of high speed clocks with approximately 1 ns resolution.
The AD9848 is specified at pixel rates of 20 MHz, and the
AD9849 is specified at 30 MHz. The analog front end includes
black level clamping, CDS,
PxGA
, VGA, and a 10- or 12-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 48-lead LQFP, the AD9848 and
AD9849 are specified over an operating temperature range of
–20
°
C to +85
°
C.
PxGA
is a registered trademark and
Precision Timing
is a trademark of Analog Devices, Inc.
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