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參數(shù)資料
| 型號(hào)： | AD7778AS |
| 廠商： | ANALOG DEVICES INC |
| 元件分類： | ADC |
| 英文描述： | LC2MOS, High Speed 1-, 4- & 8-Channel 10-Bit ADCs |
| 中文描述： | 8-CH 10-BIT PROPRIETARY METHOD ADC, PARALLEL ACCESS, PQFP44 |
| 封裝： | PLASTIC, MS-022AB, QFP-44 |
| 文件頁數(shù)： | 4/12頁 |
| 文件大小： | 220K |
| 代理商： | AD7778AS |
AD7776/AD7777/AD7778
–4–
REV. 0
ABSOLUT E MAX IMUM RAT INGS*
(T
A
= +25
°
C unless otherwise noted)
V
CC
to AGND or DGND . . . . . . . . . . . . . . . . . .–0.3 V, +7 V
AGND, RT N to DGND . . . . . . . . . . . . . –0.3 V, V
CC
+ 0.3 V
CS
,
RD
,
WR
, CLK IN, DB0–DB9,
BUSY
/
INT
to DGND . . . . . . . . . . . . . –0.3 V, V
CC
+ 0.3 V
Analog Input Voltage to AGND . . . . . . . –0.3 V, V
CC
+ 0.3 V
REFOUT to AGND . . . . . . . . . . . . . . . . –0.3 V, V
CC
+ 0.3 V
REFIN to AGND . . . . . . . . . . . . . . . . . . –0.3 V, V
CC
+ 0.3 V
Operating T emperature Range
All Versions . . . . . . . . . . . . . . . . . . . . . . . . –40
°
C to +85
°
C
Storage T emperature Range . . . . . . . . . . . . –65
°
C to +150
°
C
Junction T emperature . . . . . . . . . . . . . . . . . . . . . . . . +150
°
C
DIP Package, Power Dissipation . . . . . . . . . . . . . . . . 875 mW
θ
JA
T hermal Impedance . . . . . . . . . . . . . . . . . . . . . 75
°
C/W
Lead T emperature, Soldering (10 sec) . . . . . . . . . . +260
°
C
SOIC Packages, Power Dissipation . . . . . . . . . . . . . . 875 mW
θ
JA
T hermal Impedance . . . . . . . . . . . . . . . . . . . . . 75
°
C/W
Lead T emperature, Soldering
Vapor Phase (60 sec) . . . . . . . . . . . . . . . . . . . . . . +215
°
C
Infrared (15 sec) . . . . . . . . . . . . . . . . . . . . . . . . . +220
°
C
PQFP Package, Power Dissipation . . . . . . . . . . . . . . 500 mW
θ
JA
T hermal Impedance . . . . . . . . . . . . . . . . . . . . . 95
°
C/W
Lead T emperature, Soldering
Vapor Phase (60 sec) . . . . . . . . . . . . . . . . . . . . . . +215
°
C
Infrared (15 sec) . . . . . . . . . . . . . . . . . . . . . . . . . +220
°
C
*Stresses above those listed under “Absolute Maximum Ratings” may cause
permanent damage to the device. T his is a stress rating only; functional operation
of the device at these or any other conditions above those listed in the operational
sections of this specification is not implied. Exposure to absolute maximum rating
conditions for extended periods may affect device reliability.
PIN CONFIGURAT IONS
WARNING!
ESD SENSITIVE DEVICE
C AUT ION
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 AD7776/AD7777/AD7778 feature proprietary ESD protection circuitry, permanent damage
may occur on devices subjected to high energy electrostatic discharges. T herefore, proper ESD
precautions are recommended to avoid performance degradation or loss of functionality.
24-Pin SOIC
1
2
24
23
22
10
15
11
12
14
13
21
20
18
17
16
19
9
3
4
5
TOP VIEW
(Not to Scale)
7
8
6
AD7776
DB2
DB3
DGND
DB4
DB5
DB6
DB7
DB1
DB0
C
REFIN
AGND
RTN
REFIN
A
IN
AGND
REFOUT
V
CC
DB8
(MSB) DB9
CLKIN
BUSY/INT
RD
WR
CS
28-Pin DIP & SOIC
1
2
24
23
22
10
15
11
12
14
13
21
20
17
16
9
3
4
5
7
8
6
18
19
TOP VIEW
(Not to Scale)
28
27
26
25
AD7777
NC
NC = NO CONNECT
DB2
DB3
DGND
DB4
DB5
DB6
DB7
DB1
DB0
DB8
(MSB) DB9
BUSY/INT
C
REFIN
AGND
RTN
REFIN
AGND
REFOUT
V
CC
CLKIN
RD
WR
CS
A
IN
4
A
IN
3
A
IN
2
A
IN
1
ORDE RING GUIDE
T emperature
Range
No. of
Channels
Package
Option
1
Model
AD7776AR
2
AD7777AN
AD7777AR
2
AD7778AS
2
–40
°
C to +85
°
C
–40
°
C to +85
°
C
–40
°
C to +85
°
C
–40
°
C to +85
°
C
1
4
4
8
R-24
N-28
R-28
S-44
NOT ES
1
R = SOIC, N = Plastic DIP, S = PQFP.
2
Analog Devices reserves the right to ship devices branded with a J in place of
the A, e.g., AD7776JR instead of AD7776AR. T emperature range remains
–40
°
C to +85
°
C.
44-Pin PQFP
7
8
9
10
11
6
5
4
3
2
1
33
32
31
30
29
28
27
26
25
24
23
18
19
20
21
22
17
16
15
14
13
12
39
38
37
36
35
34
44
43
42
41
40
TOP VIEW
(Not to Scale)
AD7778
NC
NC
NC
NC
N
N
N
N
N
N
N
N
N
DB2
DB3
DGND
DB4
DB5
DB6
DB7
D
D
C
R
R
A
R
A
IN
8
A
IN
7
A
IN
6
A
IN
5
A
IN
4
A
IN
3
A
IN
2
A
IN
1
AGND
REFOUT
V
CC
D
(
C
B
R
W
C
NC = NO CONNECT
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