參數(shù)資料
型號： AD7837
廠商： Analog Devices, Inc.
英文描述： Complete, Dual 12-Bit MDACs(完備的雙12位乘法D/A轉(zhuǎn)換器)
中文描述： 完備的雙12位醫(yī)療儀器行政管理制度（完備的雙12位乘法的D / A轉(zhuǎn)換器）
文件頁數(shù)： 3/12頁
文件大?。?/td> 280K
代理商： AD7837
AD7837/AD7847
REV. 0
–3–
TIMNGCHARACTERISTICS
1, 2
Limit at T
MIN
, T
MAX
(A, B Versions)
Limit at T
MIN
, T
MAX
(S Version)
Parameter
Units
Conditions/Comments
t
1
t
2
t
3
t
4
t
5
t
63
t
73
t
83
0
0
80
80
10
15
15
80
0
0
100
80
10
15
15
100
ns min
ns min
ns min
ns min
ns min
ns min
ns min
ns min
CS
to
WR
Setup T ime
CS
to
WR
Hold T ime
WR
Pulse Width
Data Valid to
WR
Setup T ime
Data Valid to
WR
Hold T ime
Address to
WR
Setup T ime
Address to
WR
Hold T ime
LDAC
Pulse Width
NOT ES
1
Sample tested @ +25
°
C to ensure compliance. All input signals are specified with tr = tf = 5 ns (10% to 90% of 5 V) and timed from a voltage level of 1.6 V.
2
See Figures 3 and 5.
3
AD7837 only.
ABSOLUT E MAX IMUM RAT INGS*
(T
A
= +25
°
C unless otherwise noted)
V
DD
to DGND, AGNDA, AGNDB . . . . . . . . –0.3 V to +17 V
V
SS1
to DGND, AGNDA, AGNDB . . . . . . . +0.3 V to –17 V
V
REFA
, V
REFB
to AGNDA, AGNDB
. . . . . . . . . . . . . . . . . . . . . . . . . .V
SS
– 0.3 V to V
DD
+ 0.3 V
AGNDA, AGNDB to DGND . . . . . . . –0.3 V to V
DD
+ 0.3 V
V
OUT A2
, V
OUT B2
to AGNDA, AGNDB
. . . . . . . . . . . . . . . . . . . . . . . . . .V
SS
– 0.3 V to V
DD
+ 0.3 V
R
FBA3
, R
FBB3
to AGNDA, AGNDB
. . . . . . . . . . . . . . . . . . . . . . . . . .V
SS
– 0.3 V to V
DD
+ 0.3 V
Digital Inputs to DGND . . . . . . . . . . . –0.3 V to V
DD
+ 0.3 V
Operating T emperature Range
Commercial/Industrial (A, B Versions) . . . –40
°
C to +85
°
C
Extended (S Version) . . . . . . . . . . . . . . . . –55
°
C to +125
°
C
Storage T emperature Range . . . . . . . . . . . . –65
°
C to +150
°
C
Lead T emperature (Soldering, 10 secs) . . . . . . . . . . . +300
°
C
Power Dissipation (Any Package) to +75
°
C . . . . . . . 1000 mW
Derates above +75
°
C by . . . . . . . . . . . . . . . . . . . . 10 mW/
°
C
NOT ES
1
If V
is open circuited with V
and either AGND applied, the V
pin will float
positive, exceeding the Absolute Maximum Ratings. If this possibility exists, a
Schottky diode connected between V
and AGND (cathode to AGND) ensures
the Maximum Ratings will be observed.
2
T he outputs may be shorted to voltages in this range provided the power dissipation
of the package is not exceeded.
3
AD7837 only.
*Stresses above those listed under “Absolute Maximum Ratings” may cause
permanent damage to the device. T his is a stress rating only and 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. Only
one Absolute Maximum Rating may be applied at any one time.
ORDE RING GUIDE
T emperature
Range
Relative
Accuracy
Package
Option
2
Model
1
AD7837AN
AD7837BN
AD7837AR
AD7837BR
AD7837AQ
AD7837BQ
AD7837SQ
AD7847AN
AD7847BN
AD7847AR
AD7847BR
AD7847AQ
AD7847BQ
AD7847SQ
–40
°
C to +85
°
C
–40
°
C to +85
°
C
–40
°
C to +85
°
C
–40
°
C to +85
°
C
–40
°
C to +85
°
C
–40
°
C to +85
°
C
–55
°
C to +125
°
C
–40
°
C to +85
°
C
–40
°
C to +85
°
C
–40
°
C to +85
°
C
–40
°
C to +85
°
C
–40
°
C to +85
°
C
–40
°
C to +85
°
C
–55
°
C to +125
°
C
±
1 LSB
±
1/2 LSB
±
1 LSB
±
1/2 LSB
±
1 LSB
±
1/2 LSB
±
1 LSB
±
1 LSB
±
1/2 LSB
±
1 LSB
±
1/2 LSB
±
1 LSB
±
1/2 LSB
±
1 LSB
N-24
N-24
R-24
R-24
Q-24
Q-24
Q-24
N-24
N-24
R-24
R-24
Q-24
Q-24
Q-24
NOT ES
1
T o order MIL-ST D-883, Class B processed parts, add /883B to part number.
2
N = Plastic DIP; Q = Cerdip; R = SOIC.
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 these devices 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.
(V
DD
= +15 V
6
5%, V
SS
= –15 V
6
5%, AGNDA = AGNDB = DGND = OV)
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