Datasheet

REV. A
–3–
AD7243
Limit at +25ⴗC, T
MIN
, T
MAX
Parameter (All Versions) Units Conditions/Comments
t
1
3
200 ns min SCLK Cycle Time
t
2
15 ns min SYNC to SCLK Falling Edge Setup Time
t
3
70 ns min SYNC to SCLK Hold Time
t
4
0 ns min Data Setup Time
t
5
40 ns min Data Hold Time
t
6
0 ns min SYNC High to LDAC Low
t
7
20 ns min LDAC Pulsewidth
t
8
0 ns min LDAC High to SYNC Low
t
9
20 ns min CLR Pulsewidth
t
10
4, 5
160 ns max SCLK Falling Edge to SDO Valid
t
11
4, 6
>t
5
ns min SCLK Falling Edge to SDO Invalid
NOTES
1
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.
2
See Figures 7 & 8.
3
SCLK mark/space ratio range is 40/60 to 60/40.
4
SDO load capacitance is no greater than 50 pF.
5
At 25°C t
10
is 130 ns max.
6
Guaranteed by design.
ORDERING GUIDE
Model Temperature Range Relative Accuracy Package Option
1
AD7243AN –40°C to +85°C ± 1 LSB N-16
AD7243BN –40°C to +85°C ± 1/2 LSB N-16
AD7243AR –40°C to +85°C ± 1 LSB R-16
AD7243BR –40°C to +85°C ± 1/2 LSB R-16
AD7243AQ –40°C to +85°C ± 1 LSB Q-16
AD7243BQ –40°C to +85°C ± 1/2 LSB Q-16
AD7243SQ
2
–55°C to +125°C ± 1 LSB Q-16
NOTES
1
N = Plastic DIP; R = SOIC; Q = Cerdip.
2
Available to /883B processing only. Contact your local sales office for military data sheet.
ABSOLUTE MAXIMUM RATINGS
1
(T
A
= +25°C unless otherwise noted)
V
DD
to AGND, DGND . . . . . . . . . . . . . . . . . –0.3 V to +17 V
V
SS
to AGND, DGND . . . . . . . . . . . . . . . . . +0.3 V to –17 V
AGND to DGND . . . . . . . . . . . . . . . . –0.3 V to V
DD
+ 0.3 V
V
OUT
2
to AGND . . . . . . . . . . . . . . . . . . . –6 V to V
DD
+ 0.3 V
REFOUT to AGND . . . . . . . . . . . . . . . . . . . . . . . 0 V to V
DD
REFIN to AGND . . . . . . . . . . . . . . . . –0.3 V to V
DD
+ 0.3 V
Digital Inputs to DGND . . . . . . . . . . . –0.3 V to V
DD
+ 0.3 V
SDO to DGND . . . . . . . . . . . . . . . . . . –0.3 V to V
DD
+ 0.3 V
Operating Temperature Range
Industrial (A, B Versions) . . . . . . . . . . . . . –40°C to +85°C
Extended (S Version) . . . . . . . . . . . . . . . . –55°C to +125°C
TIMING CHARACTERISTICS
1, 2
Storage Temperature Range . . . . . . . . . . . . –65°C to +150°C
Lead Temperature (Soldering, 10 secs) . . . . . . . . . . . .+300°C
Power Dissipation (Any Package) to +75°C . . . . . . . 450 mW
Derates above +75°C by . . . . . . . . . . . . . . . . . . . . . 6 mW/°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 listed in the operational sections
of this specification is not implied. Exposure to absolute maximum rating condi-
tions for extended periods may affect device reliability. Only one Absolute
Maximum Rating may be applied at any time.
2
The outputs may be shorted to voltages in this range provided the power dissipation
of the package is not exceeded. Short circuit current is typically 80 mA.
(V
DD
= +10.8 V to +16.5 V, V
SS
= 0 V or –10.8 V to –16.5 V, AGND = DGND = 0 V,
R
L
= 2 k⍀, C
L
= 100 pF. All Specifications T
MIN
to T
MAX
unless otherwise noted.)
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 AD7243 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