AD AD9978BCPZ

Dual-Channel, 14-Bit CCD Signal
Processor with Precision Timing Core
AD9978
FEATURES
GENERAL DESCRIPTION
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, 65 MHz analog-to-digital converter (ADC)
Black level clamp with variable level control
Precision Timing core with 240 ps resolution @ 65 MHz
The AD9978 is a highly integrated, dual-channel CCD signal
processor for high speed digital video camera applications. Each
channel is specified at pixel rates of up to 65 MHz and consists of
a complete analog front end with ADC conversion. The Precision
Timing™ core allows adjustment of the correlated double sampler
(CDS) and sample-and-hold amplifier (SHA) clocks with 240 ps
resolution at 65 MHz operation. The AD9978 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 65 MHz, 14-bit ADC. Operation is programmed
using a 3-wire serial interface.
APPLICATIONS
Digital video cameras
Digital still cameras
Digital copiers
Multifunction printers
High speed industrial cameras
Packaged in a space-saving, 6 mm × 6 mm, 40-lead LFCSP, the
AD9978 is specified over an operating temperature range of
−25°C to +85°C.
FUNCTIONAL BLOCK DIAGRAM
AD9978
VREF
INP_A
INM_A
INP_B
INM_B
6dB TO 42dB
CDS/
SHA
ADC
VGA
–3dB, 0dB, +3dB, +6dB
CLAMP
–3dB, 0dB, +3dB, +6dB
CLAMP
LVDS
SERIALIZER
6dB TO 42dB
CDS/
SHA
VGA
ADC
DOUT0P
DOUT0N
DOUT1P
DOUT1N
TCLKP
TCLKN
DOUT2P
DOUT2N
DOUT3P
DOUT3N
INTERNAL CLOCKS
PRECISION
TIMING
CORE
CLI
SYNC
GENERATOR
HD
VD
INTERNAL
REGISTERS
SL
SDATA
SCK
06810-001
CLK_OUT
Figure 1.
For more information about the AD9978, contact Analog Devices via email at [email protected]
Rev. SpB
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 ©2007–2008 Analog Devices, Inc. All rights reserved.
AD9978
NOTES
©2008 Analog Devices, Inc. All rights reserved. Trademarks and
registered trademarks are the property of their respective owners.
D06810F-0-9/08(SpB)
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