AD9940BSTZ データシートの表示（PDF） - Analog Devices
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AD9940BSTZ Datasheet PDF : 20 Pages
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Data Sheet
High Speed, Correlated Double Sampler
with Integrated Timing Driver
AD9940
FEATURES
56 MSPS correlated double sampler (CDS) with 6 dB gain
On-chip horizontal and RG timing driver
Single-supply operation (2.7 V min)
Precision Timing™ core with 0.37 ns resolution at 56 MSPS
Low power CMOS: 105 mW at 2.7 V (115 mW at 3.0 V)
48-lead LQFP and 48-lead LFCSP packages
APPLICATIONS
Professional HDTV camcorders
Professional/high end digital cameras
Broadcast cameras
Industrial high speed cameras
High speed data-acquisition systems
GENERAL DESCRIPTION
The AD9940 is a high speed, correlated double sampler for
high speed digital imaging applications. Integrated with a
programmable timing driver using the Precision Timing
core, the AD9940 features a 56 MHz CDS amplifier with
6 dB of fixed gain, an internal voltage reference supply,
and timing control for all the high speed clocks necessary
for CCD imaging systems. The Precision Timing core allows
adjustment of high speed clocks with a resolution of 0.37 ns.
Output buffers are also included, providing drive strength for
PCB traces and direct connection to an image signal processor
such as the AD9941.
The AD9940 is ideal for applications that need to place the
CDS and VGA/ADC circuits on separate PC boards. The fully
differential outputs of the AD9940 provide good signal integ-
rity when interfaced with the differential input AD9941. The
AD9940 operates from a single 2.7 V power supply, typically
dissipates 105 mW (excluding the H/RG drive current), and is
packaged in 48-lead LQFP and 48-lead LFCSP packages.
CCDIN
AD9940
FUNCTIONAL BLOCK DIAGRAM
REFT REFB
VREF
CDS
BUF
DIFFN
DIFFP
RG
HL
H1 TO H4
HORIZONTAL
4
DRIVERS
.
INTERNAL
CLOCKS
PRECISION
TIMING
GENERATOR
RST
SYNC
GENERATOR
INTERNAL
REGISTERS
HD SHP SHD CLI
Figure 1.
SL SCK SDI
Rev. A
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