14-Bit, CCD Signal Processor with
Precision Timing Core
AD9979
FEATURES
GENERAL DESCRIPTION
1.8 V analog and digital core supply voltage
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)
14-bit 65 MHz analog-to-digital converter
Black-level clamp with variable level control
Complete on-chip timing generator
Precision Timing™ core with 240 ps resolution @ 65 MHz
On-chip 3 V horizontal and RG drivers
General-purpose outputs (GPOs) for shutter and system
support
7 mm × 7 mm, 48-lead LFCSP
Internal LDO regulator circuitry
The AD9979 is a highly integrated CCD signal processor for
high speed digital video camera applications. Specified at pixel
rates of up to 65 MHz, the AD9979 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 approximately
240 ps resolution at 65 MHz operation.
The analog front end includes black-level clamping, CDS, VGA,
and a 65 MSPS, 14-bit analog-to-digital converter (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.
Available in a space-saving, 7 mm × 7 mm, 48-lead LFCSP,
the AD9979 is specified over an operating temperature range of
−25°C to +85°C.
APPLICATIONS
Professional HDTV camcorders
Professional/high end digital cameras
Broadcast cameras
Industrial high speed cameras
FUNCTIONAL BLOCK DIAGRAM
REFT
AD9979
REFB
VREF
CCDINP
CDS
CCDINM
ADC
VGA
14 DOUT
D0 TO D13
6dB TO 42dB
–3dB, 0dB, +3dB, +6dB
CLAMP
LDO
LDOOUT
INTERNAL CLOCKS
RG
HL
4
CLI
HORIZONTAL
DRIVERS
SYNC
GENERATOR
GPO1 GPO2
HD
VD
INTERNAL
REGISTERS
SL
SCK
SDI
05957-001
H1 TO H4
PRECISION
TIMING
CORE
Figure 1.
Rev. C
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