參數(shù)資料
型號: AD9821KST
廠商: ANALOG DEVICES INC
元件分類: ADC
英文描述: Complete 12-Bit 40 MSPS Imaging Signal Processor
中文描述: 1-CH 12-BIT PROPRIETARY METHOD ADC, PARALLEL ACCESS, PQFP48
封裝: 1.40 MM, PLASTIC, MS-026BBC, LQFP-48
文件頁數(shù): 4/16頁
文件大?。?/td> 277K
代理商: AD9821KST
REV. 0
–4–
AD9821
TIMING SPECIFICATIONS
ABSOLUTE MAXIMUM RATINGS
With
Respect
To
Parameter
Min
Max
Unit
AVDD1, AVDD2
DVDD1, DVDD2
DRVDD
Digital Outputs
DATACLK
CLPOB, PBLK
SCK, SL, SDATA
VRT, VRB
BYP1, VIN
Junction Temperature
Lead Temperature
(10 sec)
AVSS
DVSS
DRVSS
DRVSS
DVSS
DVSS
DVSS
AVSS
AVSS
–0.3
–0.3
–0.3
–0.3
–0.3
–0.3
–0.3
–0.3
–0.3
+3.9
+3.9
+3.9
DRVDD + 0.3
DVDD + 0.3
DVDD + 0.3
DVDD + 0.3
AVDD + 0.3
AVDD + 0.3
150
300
V
V
V
V
V
V
V
V
V
°
C
°
C
Parameter
Symbol
Min
Typ
Max
Unit
SAMPLE CLOCKS
DATACLK Clock Period
DATACLK Hi/Low Pulsewidth
CLPOB Pulsewidth
*
Internal Clock Delay
t
CONV
t
ADC
t
COB
t
ID
25
11
2
25
12.5
20
3.0
ns
ns
Pixels
ns
DATA OUTPUTS
Output Delay
Output Hold Time
Pipeline Delay
t
OD
t
H
13
7.6
9
16
ns
ns
Cycles
7.0
SERIAL INTERFACE
Maximum SCK Frequency
SL to SCK Setup Time
SCK to SL Hold Time
SDATA Valid to SCK Rising Edge Setup
SCK Falling Edge to SDATA Valid Hold
SCK Falling Edge to SDATA Valid Read
f
SCLK
t
LS
t
LH
t
DS
t
DH
t
DV
10
10
10
10
10
10
MHz
ns
ns
ns
ns
ns
*
Minimum CLPOB pulsewidth is for functional operation only. Wider typical pulses are recommended to achieve low noise clamp performance.
Specifications subject to change without notice.
(C
L
= 20 pF, f
SAMP
= 40 MHz, Imager-Mode Timing in Figures 5 and 6, Serial Timing in Figures 7–9)
ORDERING GUIDE
Temperature
Range
–20
°
C to +85
°
C
Package
Description
Package
Option
Model
AD9821KST
Thin Plastic
Quad Flatpack
(LQFP)
ST-48
THERMAL CHARACTERISTICS
Thermal Resistance
48-Lead LQFP Package
θ
JA
= 56
°
C/W
CAUTION
ESD (electrostatic discharge) sensitive device. Electrostatic charges as high as 4000 V readily
accumulate on the human body and test equipment and can discharge without detection. Although the
AD9821 features proprietary ESD protection circuitry, permanent damage may occur on devices
subjected to high energy electrostatic discharges. Therefore, proper ESD precautions are recommended
to avoid performance degradation or loss of functionality.
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