AD9843AJSTRL Analog Devices Inc, AD9843AJSTRL Datasheet

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AD9843AJSTRL

Manufacturer Part Number
AD9843AJSTRL
Description
IC CCD SIGNAL PROC 10BIT 48-LQFP
Manufacturer
Analog Devices Inc
Type
CCD Signal Processor, 10-Bitr
Datasheet

Specifications of AD9843AJSTRL

Rohs Status
RoHS non-compliant
Input Type
Logic
Output Type
Logic
Interface
3-Wire Serial
Mounting Type
Surface Mount
Package / Case
48-LQFP
Current - Supply
-
a
AUX1IN
AUX2IN
CLPDM
CCDIN
PBLK
CLP
AD9843A
CLP
4dB 6dB
CDS
MUX
2:1
AVDD
BUF
FUNCTIONAL BLOCK DIAGRAM
AVSS
SL
MUX
2:1
REGISTERS
INTERFACE
INTERNAL
DIGITAL
6
SCK
PRODUCT DESCRIPTION
The AD9843A is a complete analog signal processor for CCD
applications. It features a 20 MHz single-channel architecture
designed to sample and condition the outputs of interlaced and
progressive scan area CCD arrays. The AD9843A’s signal chain
consists of an input clamp, correlated double sampler (CDS),
digitally controlled variable gain amplifier (VGA), black level
clamp, and 10-bit A/D converter. Additional input modes are
provided for processing analog video signals.
The internal registers are programmed through a 3-wire serial
digital interface. Programmable features include gain adjust-
ment, black level adjustment, input configuration, and power-
down modes.
The AD9843A operates from a single 3 V power supply, typi-
cally dissipates 78 mW, and is packaged in a 48-lead LQFP.
2dB~36dB
VGA
SDATA
10
OFFSET
DAC
Complete 10-Bit 20 MSPS
8
SHP
CLPOB
CCD Signal Processor
CLP
10-BIT
ADC
INTERNAL
REFERENCE
TIMING
BANDGAP
INTERNAL
SHD
BIAS
DATACLK
10
DRVDD
DRVSS
DOUT
VRT
VRB
CML
DVDD
DVSS
AD9843A

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AD9843AJSTRL Summary of contents

Page 1

PBLK CCDIN CLPDM AUX1IN AUX2IN CLP AD9843A PRODUCT DESCRIPTION The AD9843A is a complete analog signal processor for CCD applications. It features a 20 MHz single-channel architecture designed to sample and condition the outputs of interlaced and progressive scan ...

Page 2

AD9843A–SPECIFICATIONS GENERAL SPECIFICATIONS Parameter TEMPERATURE RANGE Operating Storage POWER SUPPLY VOLTAGE Analog, Digital, Digital Driver POWER CONSUMPTION Normal Operation Power-Down Modes Fast Recovery Mode Standby Total Power-Down MAXIMUM CLOCK RATE A/D CONVERTER Resolution Differential Nonlinearity (DNL) No Missing Codes Full-Scale ...

Page 3

CCD-MODE SPECIFICATIONS Parameter P OWER CONSUMPTION MAXIMUM CLOCK RATE CDS 1 Allowable CCD Reset Transient 1 Max CCD Black Pixel Amplitude 1 Max Input Range Before Saturation Max Input Range Before Saturation Max Input Range Before Saturation Max Output Range ...

Page 4

AD9843A–SPECIFICATIONS AUX1-MODE SPECIFICATIONS Parameter POWER CONSUMPTION MAXIMUM CLOCK RATE INPUT BUFFER Gain Max Input Range VGA Max Output Range Gain Control Resolution Gain (Selected Using VGA Gain Register) Min Gain Max Gain Specifications subject to change without notice. AUX2-MODE SPECIFICATIONS ...

Page 5

TIMING SPECIFICATIONS Serial Timing in Figures 8–10.) Parameter SAMPLE CLOCKS DATACLK, SHP, SHD Clock Period DATACLK High/Low Pulsewidth SHP Pulsewidth SHD Pulsewidth CLPDM Pulsewidth 1 CLPOB Pulsewidth SHP Rising Edge to SHD Falling Edge SHP Rising Edge to SHD ...

Page 6

AD9843A CONNECT Pin Number Name 1, 2 DRVSS 3–12 D0–D9 13 DRVDD 14 DRVSS 15, 18, 24, 41 DVSS 16 DATACLK 17 DVDD1 19 PBLK 20 CLPOB 21 SHP 22 SHD 23 CLPDM 25, 26, 35 AVSS ...

Page 7

DEFINITIONS OF SPECIFICATIONS DIFFERENTIAL NONLINEARITY (DNL) An ideal ADC exhibits code transitions that are exactly 1 LSB apart. DNL is the deviation from this ideal value. Thus every code must have a finite width. No missing codes guaranteed to 10-bit ...

Page 8

Performance Characteristics AD9843A 100 SAMPLE RATE – MHz 0.5 0.25 0 –0.25 –0.5 0 200 400 600 4 3 ...

Page 9

CCD-MODE AND AUX-MODE TIMING CCD SIGNAL SHP t S1 SHD t INH DATACLK t OD OUTPUT N–10 DATA NOTES: 1. RECOMMENDED PLACEMENT FOR DATACLK RISING EDGE IS BETWEEN THE SHD RISING EDGE AND NEXT SHP ...

Page 10

AD9843A SERIAL INTERFACE TIMING AND INTERNAL REGISTER DESCRIPTION Register Address Name Operation Channel Select CCD/AUX VGA Gain LSB Clamp Level LSB Control CDS ...

Page 11

Table II. Operation Register Contents (Default Value x000) D10 Must be set to zero. Set to one. Table III. VGA Gain Register Contents (Default Value x096) MSB D10 ...

Page 12

AD9843A DC RESTORE 0.1 F CCDIN CLPDM CIRCUIT DESCRIPTION AND OPERATION The AD9843A signal processing chain is shown in Figure 11. Each processing step is essential in achieving a high-quality image from the raw CCD pixel data. DC Restore To ...

Page 13

CLPOB or separately. The CLPDM pulse should be a minimum of four pixels wide. Variable Gain Amplifier The VGA stage provides a gain range dB, program- mable with 10-bit resolution through the serial ...

Page 14

AD9843A 0.8V ??V 0.1 F INPUT SIGNAL 0.4V AUX2IN VIDEO SIGNAL 0.1 F MSB D10 CCD V OUT V-DRIVE 0.4V 0dB TO 36dB 5k AUX1IN VGA 10 ...

Page 15

APPLICATIONS INFORMATION The AD9843A is a complete Analog Front End (AFE) product for digital still camera and camcorder applications. As shown in Figure 16, the CCD image (pixel) data is buffered and sent to the AD9843A analog input through a ...

Page 16

AD9843A OUTLINE DIMENSIONS Dimensions shown in inches and (mm). 48-Lead LQFP (ST-48) 0.063 (1.60) MAX 0.354 (9.00) BSC SQ 0.030 (0.75 0.018 (0.45 TOP VIEW (PINS DOWN) COPLANARITY 12 25 0.003 (0.08 MIN ...

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