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AD9978A Schematic ( PDF Datasheet ) - Analog Devices

Teilenummer AD9978A
Beschreibung 14-Bit HD Image Signal Processor
Hersteller Analog Devices
Logo Analog Devices Logo 




Gesamt 2 Seiten
AD9978A Datasheet, Funktion
Dual-Channel, 14-Bit HD Image Signal
Processor with Precision Timing Core
AD9978A
FEATURES
Dual AFE channels
1.8 V analog and digital core supply voltage
Serial data output with reduced range LVDS outputs
Differential analog inputs
CDS or SHA configuration (CDS bypass) with
−3 dB, 0 dB, +3 dB, and +6 dB gain
6 dB to 42 dB, 10-bit variable gain amplifier (VGA)
14-bit, 75 MHz analog-to-digital converter (ADC)
www.DBalatacSkhleveet4lUcl.camomp with variable level control
Precision Timing core with 210 ps resolution @ 75 MHz
APPLICATIONS
Digital video cameras
Digital still cameras
Digital copiers
Multifunction printers
High speed industrial cameras
GENERAL DESCRIPTION
The AD9978A is a highly integrated, dual-channel, charge-
coupled device (CCD) signal processor for high speed digital
video camera applications. Each channel is specified at pixel
rates of up to 75 MHz and consists of a complete analog front
end (AFE) with ADC conversion. The Precision Timing™ core
allows adjustment of the correlated double sampler (CDS) and
sample-and-hold amplifier (SHA) clocks with 210 ps resolution at
75 MHz operation. The AD9978A also contains a reduced range
low voltage differential signaling (LVDS) interface for the dual-
channel data outputs.
Each analog front end includes black level clamping, a CDS,
a VGA, and a 75 MHz, 14-bit analog-to-digital converter (ADC).
Operation is programmed using a 3-wire serial interface.
Packaged in a space-saving, 6 mm × 6 mm, 40-lead LFCSP, the
AD9978A is specified over an operating temperature range of
−25°C to +85°C.
FUNCTIONAL BLOCK DIAGRAM
AD9978A
INP_A
INM_A
INP_B
INM_B
CDS/
SHA
6dB TO 42dB
VGA
–3dB, 0dB, +3dB, +6dB
–3dB, 0dB, +3dB, +6dB
6dB TO 42dB
CDS/
SHA
VGA
VREF
ADC
CLAMP
CLAMP
ADC
LVDS
SERIALIZER
INTERNAL CLOCKS
CLK_OUT
Precision
Timing
CORE
SYNC
GENERATOR
INTERNAL
REGISTERS
HD VD
Figure 1.
SL SDATA SCK
DOUT0P
DOUT0N
DOUT1P
DOUT1N
TCLKP
TCLKN
DOUT2P
DOUT2N
DOUT3P
DOUT3N
CLI
For more information about the AD9978A, contact Analog Devices, Inc., at [email protected].
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.
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
©2008 Analog Devices, Inc. All rights reserved.





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