12-Bit CCD Signal Processor
with Precision Timing
AD9971
FEATURES
GENERAL DESCRIPTION
1.8 V analog and digital core supply voltage
Serial data link with reduced range LVDS outputs
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)
12-bit, 50 MHz ADC
Black level clamp with variable level control
Complete on-chip timing generator
Precision Timing core with 310 ps resolution @ 50 MHz
On-chip, 3 V horizontal and RG drivers
6 mm × 6 mm, 40-lead LFCSP_VQ
The AD9971 is a highly integrated CCD signal processor for
high speed digital video camera applications. Specified at pixel
rates of up to 50 MHz, the AD9971 consists of a complete analog
front end with analog-to-digital conversion combined with a
programmable timing driver. The Precision Timing™ core allows
adjustment of high speed clocks with 310 ps resolution at
50 MHz operation. The AD9971 also contains a reduced range
LVDS interface for the data outputs.
The analog front end includes black level clamping, CDS, VGA,
and a 50 MSPS, 12-bit ADC. The timing driver provides the high
speed CCD clock drivers for RG, HL, and H1 to H4. Operation
is programmed using a 3-wire serial interface.
APPLICATIONS
Packaged in a space-saving 6 mm × 6 mm, 40-lead LFCSP_VQ,
the AD9971 is specified over an operating temperature range of
−25°C to +85°C.
Digital video camcorders
Professional/high end digital cameras
Broadcast cameras
Industrial high speed cameras
High speed data acquisition systems
FUNCTIONAL BLOCK DIAGRAM
REFT REFB
AD9971
VREF
–3, 0, +3, +6dB
CDS
6dB TO 42dB
VGA
TCLKP
TCLKN
CCDINP
CCDINM
12-BIT
ADC
REDUCED
DOUT0P
DOUT0N
RANGE
LVDS OUTPUT
CLAMP
3V INPUT
DOUT1P
DOUT1N
IOVDD
LDO
REG
1.8V OUTPUT
LDOOUT
INTERNAL CLOCKS
RG
HL
PRECISION
TIMING
GENERATOR
HORIZONTAL
DRIVERS
4
SL
H1 TO H4
INTERNAL
REGISTERS
SCK
SDATA
SYNC
GENERATOR
GPO1 GPO2
HD VD
CLI
Figure 1.
For more information about the AD9971, contact
Analog Devices, Inc. via email at: afe.ccd@analog.com.
Rev. SpA
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 registeredtrademarks arethe 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 ©2006–2007 Analog Devices, Inc. All rights reserved.
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