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參數資料
| 型號： | AD7655AST |
| 廠商： | ANALOG DEVICES INC |
| 元件分類： | ADC |
| 英文描述： | Low Cost 4-Channel 1 MSPS 16-Bit ADC |
| 中文描述： | 4-CH 16-BIT SUCCESSIVE APPROXIMATION ADC, SERIAL/PARALLEL ACCESS, PQFP48 |
| 封裝： | SEPOSEDPAD, MS-026BBC, LQFP-48 |
| 文件頁數： | 5/20頁 |
| 文件大小： | 684K |
| 代理商： | AD7655AST |
REV. 0
AD7655
–5–
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
AD7655 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.
ABSOLUTE MAXIMUM RATINGS
1
Analog Inputs
INAx
2
, INBx
2
, REFx, INxN, REFGND
AGND . . . . . . . . . . . . . . . . . . . . . .
–
0.3 V to AVDD + 0.3 V
Ground Voltage Differences
AGND, DGND, OGND . . . . . . . . . . . . . . . . . . . . . .
±
0.3 V
Supply Voltages
AVDD, DVDD, OVDD . . . . . . . . . . . . . . . . .
–
0.3 V to +7 V
AVDD to DVDD,
AVDD to OVDD . . . . . . . . . . . . . .
±
7 V
DVDD to OVDD . . . . . . . . . . . . . . . . . . . . . . -0.3 V to +7 V
Digital Inputs . . . . . . . . . . . . . . . . .
–
0.3 V to DVDD + 0.3 V
Internal Power Dissipation
3
. . . . . . . . . . . . . . . . . . . . .700 mW
Internal Power Dissipation
4
. . . . . . . . . . . . . . . . . . . . . . .2.5 W
Junction Temperature . . . . . . . . . . . . . . . . . . . . . . . . . . 150
∞
C
Storage Temperature Range . . . . . . . . . . . . .
–
65
∞
C to +150
∞
C
Lead Temperature Range
(Soldering 10 sec) . . . . . . . . . . . . . . . . . . . . . . . . . . . 300
∞
C
NOTES
1
Stresses above those listed under Absolute Maximum Ratings may cause perma-
nent damage to the device. This is a stress rating only; functional operation of the
device at these or any other conditions above those indicated in the operational
section of this specification is not implied. Exposure to absolute maximum rating
conditions for extended periods may affect device reliability.
2
See Analog Input section.
3
Specification is for device in free air: 48-Lead LQFP:
= 91
∞
C/W,
= 30
∞
C/W.
4
Specification is for device in free air: 48-Lead LFCSP:
JA
= 26
∞
C/W.
ORDERING GUIDE
Model
Temperature Range
–
40
∞
C to +85
∞
C
–
40
∞
C to +85
∞
C
–
40
∞
C to +85
∞
C
–
40
∞
C to +85
∞
C
Package Description
Package Option
AD7655AST
AD7655ASTRL
AD7655ACP
AD7655ACPRL
EVAL-AD7655CB
1
EVAL-CONTROL BRD2
2
Quad Flatpack (LQFP)
Quad Flatpack (LQFP)
Chip Scale Pack (LFCSP)
Chip Scale Pack (LFCSP)
Evaluation Board
Controller Board
ST-48
ST-48
CP-48
CP-48
NOTES
1
This board can be used as a standalone evaluation board or in conjunction with the EVAL-CONTROL BRD2 for evaluation/demonstration purposes.
2
This board allows a PC to control and communicate with all Analog Devices evaluation boards ending in the CB designators.
TO OUTPUT
PIN
C
L
60pF
*
500 A
I
OH
1.6mA
I
OL
1.4V
*
IN SERIAL INTERFACE MODES, THE SYNC, SCLK, AND
SDOUT TIMINGS ARE DEFINED WITH A MAXIMUM LOAD
C
L
OF 10pF; OTHERWISE, THE LOAD IS 60pF MAXIMUM.
Figure 1. Load Circuit for Digital Interface Timing,
SDOUT, SYNC, SCLK Outputs, C
L
= 10 pF
0.8V
2V
2V
0.8V
t
DELAY
2V
0.8V
t
DELAY
Figure 2. Voltage Reference Levels for Timing
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