AD9937_15 Datasheet, PDF (1/44 Pages) Analog Devices – CCD Signal Processor with Precision Timing Generator

CCD Signal Processor with
Precision Timing^™ Generator
AD9937
FEATURES
12 MSPS Correlated Double Sampler (CDS)
10-Bit 12 MHz A/D Converter
No Missing Codes Guaranteed
6 dB to 40 dB Variable Gain Amplifier (VGA)
Black Level Clamp with Variable Level Control
Complete On-Chip Timing Generator
Precision Timing Core with 1.7 ns Resolution
On-Chip: 6-Channel Horizontal and 1-Channel RS Drivers
4-Phase Vertical Transfer Clocks
Electronic and Mechanical Shutter Modes
On-Chip Sync Generator with External Sync Option
APPLICATIONS
Digital Still Cameras
Industrial Imaging
GENERAL DESCRIPTION
The AD9937 is a highly integrated CCD signal processor. It
includes a complete analog front end with A/D conversion,
combined with a full-function programmable timing generator.
A Precision Timing core allows adjustment of high speed clocks
with 1.7 ns resolution at 12 MHz operation.
The AD9937 is specified at pixel rates of up to 12 MHz. The
analog front end includes black level clamping, CDS, VGA, and
a 10-bit A/D converter. The timing generator provides all the
necessary CCD clocks: RS, H-clocks, V-clocks, sensor gate pulses,
and substrate charge reset pulse. Operation is programmed using a
3-wire serial interface.
The AD9937 is packaged in a 56-lead LFCSP and specified over
an operating temperature range of –25°C to +85°C.
FUNCTIONAL BLOCK DIAGRAM
REFT REFB
AD9937
6dB TO 40dB
CDS
VGA
VREF
ADC
10
DOUT
RS
H1 A–D
H2 A, B
V1 A/B
V2
V3 A/B
V4
TG1A
TG1B
TG3A
TG3B
HORIZONTAL
6
DRIVERS
4
V-H
CONTROL
4
CLAMP
INTERNAL CLOCKS
PRECISION
TIMING
GENERATOR
SYNC
GENERATOR
INTERNAL
REGISTERS
VCLK
LM OFD
HD VD
VCKM SLD SCK SDA
REV. 0
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