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AD9942 Datasheet

  • AD9942

  • Dual-Channel, 14-Bit, CCD Signal Processor with Precision Ti...

  • 33頁

  • AD

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Dual-Channel, 14-Bit CCD Signal Processor
with
Precision Timing鈩?/div>
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 脳 9 mm, CSP_BGA package
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 脳 9 mm, CSP_BGA package,
the AD9942 is specified over an operating temperature range of
鈭?5擄C to +85擄C.
APPLICATIONS
Signal processor for dual-channel CCD outputs
Digital still cameras
Digital video cameras
High speed digital imaging applications
FUNCTIONAL BLOCK DIAGRAM
REFT_A REFB_A
REFT_B REFB_B
AD9942
VREF_A
VREF_B
14
CCDIN_A
CDS
VGA
0dB
~
18dB
ADC
CLAMP
CLAMP
0dB
~
18dB
DOUT_A
CCDIN_B
CDS
VGA
ADC
14
DOUT_B
INTERNAL CLOCKS
RG_A
RG_B
H1A TO H4A
H1B TO H4B
4
4
SYNC
GENERATOR
INTERNAL
REGISTERS
SCK_A
SCK_B
05240-001
HORIZONTAL
DRIVERS
PRECISION
TIMING
CORE
CLI_A
CLI_B
HD_A VD_A HD_B VD_B
SL_A SDATA_A SL_B SDATA_B
Figure 1.
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.
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
www.analog.com
Fax: 781.461.3113
漏2006 Analog Devices, Inc. All rights reserved.

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