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| 型號(hào)： | AD9990 |
| 廠商： | Analog Devices, Inc. |
| 英文描述： | Dual Channel, 14-Bit CCD Signal Processor with V-Driver and Precision Timing |
| 中文描述： | 雙通道，14位CCD信號(hào)處理器與V - Driver和精確定時(shí) |
| 文件頁(yè)數(shù)： | 1/2頁(yè) |
| 文件大小： | 69K |
| 代理商： | AD9990 |
Dual Channel, 14-Bit CCD Signal Processor
with V-Driver and
Precision Timing
AD9990
FEATURES
Rev. Sp0
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. Specifications subject to change without notice. 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 owners.
One Technology Way, P.O. Box 9106, Norwood, MA 02062-9106, U.S.A.
Tel: 781.329.4700
Fax: 781.461.3113
2007 Analog Devices, Inc. All rights reserved.
www.analog.com
1.8 V AFETG core
Internal LDO regulators
24 programmable vertical clock signals
Correlated double sampler (CDS) with
3 dB, 0 dB, +3 dB, and +6 dB gain
6 dB to 42 dB, 10-bit variable gain amplifier (VGA)
14-bit, 32 Hz analog-to-digital converter (ADC)
Black level clamp with variable level control
Complete on-chip timing generator
Precision Timing
core with ~488 ps resolution
On-chip 3 V horizontal and RG drivers
General-purpose outputs (GPOs) for shutter and
system support
On-chip driver for external crystal
On-chip sync generator with external sync input
112-ball CSP_BGA package, 8 mm × 8 mm, 0.65 mm pitch
APPLICATIONS
Digital still cameras
GENERAL DESCRIPTION
The AD9990 is a highly integrated CCD signal processor for
digital still camera applications. It includes a complete analog
front end with analog-to-digital conversion and a full-function
programmable timing generator for a 2-channel output CCD.
Each channel is specified up to 32 MHz. The timing generator is
capable of supporting up to 24 vertical clock signals to control
advanced CCDs. A
Precision Timing
core allows adjustment of
high speed clocks with approximately 488 ps resolution at 32 MHz
operation. The AD9990 also contains eight general-purpose
outputs that can be used for shutter and system functions.
Each analog front end includes black level clamping, a CDS, a
VGA, and a 14-bit ADC. The timing generator provides all the
necessary CCD clocks: RG, H-clocks, V-clocks, sensor gate
pulses, substrate clock, and substrate bias control.
The AD9990 is specified over an operating temperature range
of 25°C to +85°C.
For more information about the AD9990, contact Analog Devices
via email at
afe.ccd@analog.com
.
FUNCTIONAL BLOCK DIAGRAM
REFT_B REFB_B
REFT_A
REFB_A
CDS
VGA
CLAMP
14-BIT
ADC
SL
SCK
SDATA
CLI
VREF_B
6dB TO 42dB
HORIZONTAL
DRIVERS
VERTICAL
TIMING
CONTROL
RG_A, RG_B
H1A TO H4A, H1B TO H4B
24
PRECISION
TIMING
GENERATOR
SYNC
GENERATOR
INTERNAL CLOCKS
HD
VD
SYNC
INTERNAL
REGISTERS
CCDIN_A
–3dB, 0dB, +3dB, +6dB
14
HL_A, HL_B
CLO
GPO1 TO GPO8
Figure 1.
XV1 TO XV24
1.8V OUTPUT
3V INPUT
8
8
LDO
REG_B
1.8V OUTPUT
3V INPUT
LDO
REG_A
SUBCK
RSTB
CDS
VGA
CLAMP
14-BIT
ADC
6dB TO 42dB
CCDIN_B
–3dB, 0dB, +3dB, +6dB
14
VREF_A
2
2
DATA
OUTPUT
MUX
DOUT
14
AD9990
0
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