AD7801 查看數據表（PDF） - Analog Devices
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AD7801 Datasheet PDF : 16 Pages
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AD7801
TIMING CHARACTERISTICS1, 2 (VDD = +2.7 V to +5.5 V; GND = 0 V; Internal VDD/2 Reference. All specifications TMIN to TMAX
unless otherwise noted.)
Parameter
Limit at TMIN, TMAX
(B Version)
Units
Conditions/Comments
t1
0
t2
0
t3
20
t4
15
t5
4.5
t6
20
t7
20
t8
20
ns min
ns min
ns min
ns min
ns min
ns min
ns min
ns min
Chip Select to Write Setup Time
Chip Select to Write Hold Time
Write Pulse Width
Data Setup Time
Data Hold Time
Write to LDAC Setup Time
LDAC Pulse Width
CLR Pulse Width
NOTES
1Sample tested at +25°C to ensure compliance. All input signals are specified with tr = tf = 5 ns (10% to 90% of V DD) and timed from a voltage level of
(VIL + VIH)/2. tr and tf should not exceed 1 µs on any digital input.
2See Figure 1.
ABSOLUTE MAXIMUM RATINGS*
(TA = +25°C unless otherwise noted)
VDD to GND . . . . . . . . . . . . . . . . . . . . . . . . . . –0.3 V to +7 V
Reference Input Voltage to AGND . . . . –0.3 V to VDD + 0.3 V
Digital Input Voltage to DGND . . . . . . –0.3 V to VDD + 0.3 V
AGND to DGND . . . . . . . . . . . . . . . . . . . . . –0.3 V to +0.3 V
VOUT to AGND . . . . . . . . . . . . . . . . . . –0.3 V to VDD + 0.3 V
Operating Temperature Range
Commercial (B Version) . . . . . . . . . . . . . –40°C to +105°C
Storage Temperature Range . . . . . . . . . . . . –65°C to +150°C
Junction Temperature . . . . . . . . . . . . . . . . . . . . . . . . .+150°C
SSOP Package, Power Dissipation . . . . . . . . . . . . . . . 700 mW
θJA Thermal Impedance . . . . . . . . . . . . . . . . . . . . 143°C/W
Lead Temperature, Soldering
Vapor Phase (60 sec) . . . . . . . . . . . . . . . . . . . . . . .+215°C
Infrared (15 sec) . . . . . . . . . . . . . . . . . . . . . . . . . .+220°C
SOIC Package, Power Dissipation . . . . . . . . . . . . . . . 870 mW
θJA Thermal Impedance . . . . . . . . . . . . . . . . . . . . . 74°C/W
Lead Temperature, Soldering
Vapor Phase (60 sec) . . . . . . . . . . . . . . . . . . . . . . .+215°C
Infrared (15 sec) . . . . . . . . . . . . . . . . . . . . . . . . . .+220°C
*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 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
Model
Temperature
Range
AD7801BR
AD7801BRU
–40°C to +105°C
–40°C to +105°C
*R = Small Outline; RU = Thin Shrink Small Outline.
Package
Option*
R-20
RU-20
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 AD7801 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. 0
–3–
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