AD7840 データシートの表示（PDF） - Analog Devices
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AD7840 Datasheet PDF : 16 Pages
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AD7840
TIMING CHARACTERISTICS1, 2 (VDD = +5 V ؎ 5%, VSS = –5 V ؎ 5%, AGND = DGND = 0 V.)
Parameter
Limit at TMIN, TMAX
(J, K, A, B Versions)
Limit at TMIN, TMAX
(S Version)
Units
Conditions/Comments
t1
0
t2
0
t3
45
t4
21
t5
10
t6
40
t7
50
t83
150
t9
30
t10
75
t11
75
0
ns min
CS to WR Setup Time
0
ns min
CS to WR Hold Time
50
ns min
WR Pulse Width
28
ns min
Data Valid to WR Setup Time
15
ns min
Data Valid to WR Hold Time
40
ns min
LDAC Pulse Width
50
ns min
SYNC to SCLK Falling Edge
200
ns min
SCLK Cycle Time
40
ns min
Data Valid to SCLK Setup Time
100
ns min
Data Valid to SCLK Hold Time
100
ns min
SYNC to SCLK Hold Time
NOTES
1Timing specifications in bold print are 100% production tested. All other times are sample tested at +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.
2See Figures 6 and 8.
3SCLK mark/space ratio is 40/60 to 60/40.
Specifications subject to change without notice.
ABSOLUTE MAXIMUM RATINGS*
VDD to AGND . . . . . . . . . . . . . . . . . . . . . . . . . –0.3 V to +7 V
VSS to AGND . . . . . . . . . . . . . . . . . . . . . . . . . +0.3 V to –7 V
AGND to DGND . . . . . . . . . . . . . . . . –0.3 V to VDD + 0.3 V
VOUT to AGND . . . . . . . . . . . . . . . . . . . . . . . . . . . VSS to VDD
REF OUT to AGND . . . . . . . . . . . . . . . . . . . . . . . 0 V to VDD
REF IN to AGND . . . . . . . . . . . . . . . . –0.3 V to VDD + 0.3 V
Digital Inputs to DGND . . . . . . . . . . . –0.3 V to VDD + 0.3 V
Operating Temperature Range
Commercial (J, K Versions) . . . . . . . . . . . . . . 0°C to +70°C
Industrial (A, B Versions) . . . . . . . . . . . . . . –25°C to +85°C
Extended (S Version) . . . . . . . . . . . . . . . . –55°C to +125°C
Storage Temperature Range . . . . . . . . . . . . –65°C to +150°C
Lead Temperature (Soldering, 10 sec) . . . . . . . . . . . . +300°C
Power Dissipation (Any Package) to +75°C . . . . . . . . 450 mW
Derates above +75°C by . . . . . . . . . . . . . . . . . . . . 10 mW/°C
*Stresses above those listed under “Absolute Maximum Ratings” may cause
permanent damage to the device. This 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.
ORDERING GUIDE
Model1
Temperature
Range
SNR
(dB)
Integral
Nonlinearity Package
(LSB)
Option2
AD7840JN
AD7840KN
AD7840JP
AD7840KP
AD7840AQ
AD7840ARS
AD7840BQ
AD7840SQ3
0°C to +70°C
0°C to +70°C
0°C to +70°C
0°C to +70°C
–25°C to +85°C
–25°C to +85°C
–25°C to +85°C
–55°C to +125°C
78 min
80 min
78 min
80 min
78 min
78 min
80 min
78 min
± 2 max
± 1 max
± 2 max
± 1 max
± 2 max
± 2 max
± 1 max
± 2 max
N-24
N-24
P-28A
P-28A
Q-24
RS-24
Q-24
Q-24
NOTES
1To order MIL-STD-883, Class B processed parts, add /883B to part number.
Contact your local sales office for military data sheet and availability.
2N = Plastic DIP; P = Plastic Leaded Chip Carrier; Q = Cerdip.
3This grade will be available to /883B processing only.
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 AD7840 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.
WARNING!
ESD SENSITIVE DEVICE
REV. B
–3–
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