ADDI7100 Datasheet, PDF (1/20 Pages) Analog Devices – Complete, 12-Bit, 45 MHz CCD Signal Processor

Complete, 12-Bit, 45 MHz
CCD Signal Processor
ADDI7100
FEATURES
Pin-compatible upgrade for the AD9945
45 MHz correlated double sampler (CDS) with variable gain
6 dB to 42 dB, 10-bit variable gain amplifier (VGA)
Low noise optical black clamp circuit
Preblanking function
12-bit, 45 MHz ADC
No missing codes guaranteed
3-wire serial digital interface
3 V single-supply operation
Space-saving, 32-lead, 5 mm × 5 mm LFCSP
APPLICATIONS
Digital still cameras
Digital video camcorders
PC cameras
Portable CCD imaging devices
CCTV cameras
GENERAL DESCRIPTION
The ADDI7100 is a complete analog signal processor for charge-
coupled device (CCD) applications. It features a 45 MHz,
single-channel architecture designed to sample and condition
the outputs of interlaced and progressive scan area CCD arrays.
The signal chain for the ADDI7100 consists of a correlated double
sampler (CDS), a digitally controlled variable gain amplifier
(VGA), a black level clamp, and a 12-bit ADC.
The internal registers are programmed through a 3-wire serial
digital interface. Programmable features include gain adjustment,
black level adjustment, input clock polarity, and power-down
modes. The ADDI7100 operates from a single 3 V power supply,
typically dissipates 125 mW, and is packaged in a space-saving,
32-lead LFCSP.
FUNCTIONAL BLOCK DIAGRAM
REFT REFB
PBLK
ADDI7100
−3dB, 0dB,
+3dB, +6dB
CCDIN
CDS
6dB TO 42dB
VGA
BAND GAP
REFERENCE
12-BIT
ADC
DRVDD
DRVSS
12
DOUT
D0 TO D11
AVDD
AVSS
CLP
10
CLPOB
CONTROL
REGISTERS
DIGITAL
INTERFACE
INTERNAL
TIMING
DVDD
DVSS
VD SL
SCK SDATA
Figure 1.
SHP SHD DATACLK
Rev. C
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