AD9822JRSZ Analog Devices Inc, AD9822JRSZ Datasheet

IC CCD SIGNAL PROC 14BIT 28SSOP

AD9822JRSZ

Manufacturer Part Number
AD9822JRSZ
Description
IC CCD SIGNAL PROC 14BIT 28SSOP
Manufacturer
Analog Devices Inc
Type
CCD Signal Processor, 14-Bitr
Datasheet

Specifications of AD9822JRSZ

Input Type
Logic
Output Type
Logic
Interface
3-Wire Serial
Current - Supply
73mA
Mounting Type
Surface Mount
Package / Case
28-SSOP
Supply Voltage Range
3V To 5.25V, 4.75V To 5.25V
Power Dissipation Pd
450mW
Ic Mounting
SMD
Tv / Video Case Style
SSOP
No. Of Pins
28
Msl
MSL 3 - 168 Hours
Termination Type
SMD
Filter Terminals
SMD
Rohs Compliant
Yes
Digital Ic Case Style
SSOP
Lead Free Status / RoHS Status
Lead free / RoHS Compliant

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FEATURES
14-bit 15 MSPS ADC
No missing codes guaranteed
3-channel operation up to 15 MSPS
1-channel operation up to 12.5 MSPS
Correlated double sampling
1–6× programmable gain
±350 mV programmable offset
Input clamp circuitry
Internal voltage reference
Multiplexed byte-wide output (8 + 6 format)
3-wire serial digital interface
3 V/5 V digital I/O compatibility
28-Lead SOIC or SSOP
Low power CMOS: 385 mW (typ)
Power-down mode: <1 mW
APPLICATIONS
Flatbed document scanners
Film scanners
Digital color copiers
Multifunction peripherals
Rev. B
Information furnished by Analog Devices is believed to be accurate and reliable.
However, no responsibility is assumed by Analog Devices for its use, nor for any
infringements of patents or other rights of third parties that may result from its use.
Specifications subject to change without notice. No license is granted by implication
or otherwise under any patent or patent rights of Analog Devices. Trademarks and
registered trademarks are the property of their respective owners.
OFFSET
VINR
VING
VINB
AVDD
CDSCLK1
AVSS
CLAMP
INPUT
BIAS
CDS
CDS
CDS
CDSCLK2
FUNCTIONAL BLOCK DIAGRAM
CML
9-BIT
9-BIT
9-BIT
DAC
DAC
DAC
CAPT
PGA
PGA
PGA
6 6
9 9
CAPB
Figure 1.
GREEN
GREEN
MUX
BLUE
BLUE
3:1
RED
RED
CONFIGURATION
GENERAL DESCRIPTION
The AD9822 is a complete analog signal processor for CCD
imaging applications. It features a 3-channel architecture designed
to sample and condition the outputs of trilinear color CCD
arrays. Each channel consists of an input clamp, correlated double
sampler (CDS), offset DAC, and programmable gain amplifier
(PGA) multiplexed to a high performance 14-bit ADC.
The CDS amplifiers may be disabled for use with sensors such
as contact image sensors (CIS) and CMOS active pixel sensors,
which do not require CDS.
The 14-bit digital output is multiplexed into an 8-bit output
word that is accessed using two read cycles. The internal
registers are programmed through a 3-wire serial interface and
provide adjustment of the gain, offset, and operating mode.
The AD9822 operates from a single 5 V power supply,
consumes 385 mW of power typically, and is packaged in a
28-lead SOIC or SSOP.
One Technology Way, P.O. Box 9106, Norwood, MA 02062-9106, U.S.A.
Tel: 781.329.4700
Fax: 781.326.8703
AVDD
REGISTER
REGISTER
REFERENCE
GAIN
REGISTERS
OFFSET
REGISTERS
BAND GAP
MUX
14-BIT
ADC
CCD/CIS Signal Processor
AVSS
ADCCLK
DRVDD
14
AD9822
INTERFACE
© 2005 Analog Devices, Inc. All rights reserved.
CONTROL
DIGITAL
MUX
14:8
DRVSS
Complete 14-Bit
8
OEB
SCLK
SLOAD
SDATA
DOUT
www.analog.com
AD9822

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AD9822JRSZ Summary of contents

Page 1

FEATURES 14-bit 15 MSPS ADC No missing codes guaranteed 3-channel operation MSPS 1-channel operation up to 12.5 MSPS Correlated double sampling 1–6× programmable gain ±350 mV programmable offset Input clamp circuitry Internal voltage reference Multiplexed byte-wide output ...

Page 2

AD9822 TABLE OF CONTENTS Specifications..................................................................................... 3 Analog Specifications................................................................... 3 Digital Specifications ................................................................... 4 Timing Specifications .................................................................. 5 Absolute Maximum Ratings............................................................ 6 Thermal Characteristics .............................................................. 6 ESD Caution.................................................................................. 6 Pin Configuration and Function Descriptions............................. 7 Terminology ...................................................................................... 8 Functional Description .................................................................. ...

Page 3

SPECIFICATIONS ANALOG SPECIFICATIONS AVDD = 5 V, DRVDD = 5 V, CDS mode, f MIN MAX Table 1. Parameter MAXIMUM CONVERSION RATE 3-Channel Mode with CDS 1-Channel Mode with CDS ACCURACY (ENTIRE SIGNAL PATH) ADC Resolution ...

Page 4

AD9822 Parameter POWER DISSIPATION 3-Channel Mode 3-Channel Mode @ 6 MHz 1-Channel Mode 1-Channel Mode @ 6 MHz 1 Linear input signal range is from when the CCD’s reference level is clamped ...

Page 5

TIMING SPECIFICATIONS AVDD = 5 V, DRVDD = 5 V. MIN MAX Table 3. Parameter CLOCK PARAMETERS 3-Channel Pixel Rate 1-Channel Pixel Rate ADCCLK Pulse Width CDSCLK1 Pulse Width CDSCLK2 Pulse Width CDSCLK1 Falling to CDSCLK2 ...

Page 6

AD9822 ABSOLUTE MAXIMUM RATINGS Table 4. With Respect Parameter To Min VIN, CAPT, CAPB AVSS −0.3 Digital Inputs AVSS −0.3 AVDD AVSS −0.5 DRVDD DRVSS −0.5 AVSS DRVSS −0.3 Digital Outputs DRVSS −0.3 Junction Temperature Storage Temperature −65 Lead Temperature ...

Page 7

PIN CONFIGURATION AND FUNCTION DESCRIPTIONS Table 5. Pin Function Descriptions Pin No. Mnemonic Type 1 CDSCLK1 DI 2 CDSCLK2 DI 3 ADCCLK DI 4 OEB DI 5 DRVDD P 6 DRVSS (MSB ...

Page 8

AD9822 TERMINOLOGY Integral Nonlinearity (INL) Integral nonlinearity error refers to the deviation of each individual code from a line drawn from zero scale through positive full scale. The point used as zero scale occurs ½ LSB before the first code ...

Page 9

ANALOG t INPUTS AD PIXEL N ( CDSCLK1 t C1C2 CDSCLK2 t ADCLK t ADC2 ADCCLK t ADCLK OUTPUT DATA R (N– (N– (N– (N– (N– 2) ...

Page 10

AD9822 ANALOG INPUTS CDSCLK2 t ADCLK ADCCLK t ADCLK OUTPUT DATA R (N– (N– (N– (N– (N– (N– (N– (N– (N– (N– ...

Page 11

ADCCLK t OD OUTPUT HIGH BYTE LOW BYTE DATA DB13–DB6 DB5–DB0 <D7:D0> PIXEL N PIXEL N OEB SDATA R/ SCLK t LS SLOAD SDATA R/ SCLK t LS SLOAD ...

Page 12

AD9822 FUNCTIONAL DESCRIPTION The AD9822 can be operated in four different modes: 3-channel CDS mode, 3-channel SHA mode, 1-channel CDS mode, and 1-channel SHA mode. Each mode is selected by programming the configuration register through the serial interface. For more ...

Page 13

INTERNAL REGISTER DESCRIPTIONS Table 6. Internal Register Map Register Name Address Configuration MUX Red PGA Green PGA Blue PGA Red Offset 1 ...

Page 14

AD9822 PGA Gain Registers There are three PGA registers for individually programming the gain in the red, green, and blue channels. Bits D8, D7, and D6 in each register must be set low, and Bits D5 through D0 control the ...

Page 15

CIRCUIT OPERATION ANALOG INPUTS—CDS MODE Figure 10 shows the analog input configuration for the CDS mode of operation. Figure 11 shows the internal timing for the sampling switches. The CCD reference level is sampled when CDSCLK1 transitions from high to ...

Page 16

AD9822 ANALOG INPUTS—SHA MODE Figure 12 shows the analog input configuration for the SHA mode of operation. Figure 13 shows the internal timing for the sampling switches. The input signal is sampled when CDSCLK2 transitions from high to low, opening ...

Page 17

APPLICATIONS CIRCUIT AND LAYOUT RECOMMENDATIONS Figure 16 shows the recommended circuit configuration for 3-channel CDS mode operation. The recommended input coupling capacitor value is 0.1 µF (see the Circuit Operation section). A single ground plane is recommended for the AD9822. ...

Page 18

... Model Temperature Range AD9822JR 0°C to 70°C AD9822JRRL 0°C to 70°C AD9822JRS 0°C to 70°C AD9822JRSRL 0°C to 70°C 1 AD9822JRSZ 0°C to 70°C 1 AD9822JRSZRL 0°C to 70° Pb-free part. 18.10 (0.7126) 17.70 (0.6969 7.60 (0.2992) 7.40 (0.2913 2.65 (0.1043) 2.35 (0.0925) 1 ...

Page 19

NOTES Rev Page AD9822 ...

Page 20

AD9822 NOTES © 2005 Analog Devices, Inc. All rights reserved. Trademarks and registered trademarks are the property of their respective owners. C00623–0–2/05(B) Rev Page ...

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