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Analog Devices - 14-Bit CCD Signal Processor

Numéro de référence AD9942
Description 14-Bit CCD Signal Processor
Fabricant Analog Devices 
Logo Analog Devices 





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AD9942 fiche technique
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Dual-Channel, 14-Bit CCD Signal Processor
with Precision Timing™ Core
AD9942
FEATURES
40 MHz correlated double sampler (CDS)
0 dB to 18 dB, 9-bit variable gain amplifier (VGA)
40 MSPS analog-to-digital converter (ADC)
Optical black clamp (CLPOB) with variable level control
Complete on-chip timing driver
Precision Timing core with <550 ps resolution
On-chip 3 V horizontal and RG drivers
4-phase H-clock mode
100-lead, 9 mm × 9 mm, CSP_BGA package
APPLICATIONS
Signal processor for dual-channel CCD outputs
Digital still cameras
Digital video cameras
High speed digital imaging applications
GENERAL DESCRIPTION
The AD9942 is a highly integrated dual-channel CCD signal
processor for digital still camera applications. Each channel is
specified at pixel rates of up to 40 MHz. The AD9942 consists of
a complete analog front end with analog-to-digital conversion,
combined with a programmable timing driver. The Precision
Timing core allows high speed clocks to be adjusted with
550 ps resolution.
The analog front end uses black level clamping and includes a
VGA, a 40 MSPS ADC, and a CDS. The timing driver provides
the high speed CCD clock drivers for RG_A and RG_B, as well
as the H1A to H4A and H1B to H4B outputs. The 6-wire serial
interface is used to program the AD9942.
Available in a space-saving, 9 mm × 9 mm, CSP_BGA package,
the AD9942 is specified over an operating temperature range of
−25°C to +85°C.
CCDIN_A
CCDIN_B
FUNCTIONAL BLOCK DIAGRAM
REFT_A REFB_A
REFT_B REFB_B
AD9942
VREF_A
VREF_B
CDS
CDS
VGA
0dB ~ 18dB
0dB ~ 18dB
VGA
ADC
CLAMP
CLAMP
ADC
14
DOUT_A
14
DOUT_B
RG_A
RG_B
H1A TO H4A
H1B TO H4B
4 HORIZONTAL
DRIVERS
4
INTERNAL CLOCKS
PRECISION
TIMING
CORE
SYNC
GENERATOR
INTERNAL
REGISTERS
CLI_A
CLI_B
SCK_A
SCK_B
HD_A VD_A HD_B VD_B
Figure 1.
SL_A SDATA_A SL_B SDATA_B
Rev. A
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.
Trademarksandregisteredtrademarksarethepropertyoftheirrespectiveowners.
One Technology Way, P.O. Box 9106, Norwood, MA 02062-9106, U.S.A.
Tel: 781.329.4700
www.analog.com
Fax: 781.461.3113
©2006 Analog Devices, Inc. All rights reserved.

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