AD7245A/AD7248A
SWITCHING CHARACTERISTICS
1
(V
Parameter
t
1
@ +25°C
T
MIN
to T
MAX
t
2
@ +25°C
T
MIN
to T
MAX
t
3
@ +25°C
T
MIN
to T
MAX
t
4
@ +25°C
T
MIN
to T
MAX
t
5
@ +25°C
T
MIN
to T
MAX
t
6
@ +25°C
T
MIN
to T
MAX
t
7
@ +25°C
T
MIN
to T
MAX
t
8
(AD7245A only)
@ +25°C
T
MIN
to T
MAX
40
80
40
80
40
100
40
100
ns typ
ns min
ns typ
ns min
Load DAC Pulse Width
10
10
10
10
ns min
ns min
Data Valid to Write Hold Time
40
80
40
80
ns typ
ns min
Data Valid to Write Setup Time
0
0
0
0
ns min
ns min
Chip Select to Write Hold Time
0
0
0
0
ns min
ns min
Chip Select to Write Setup Time
40
80
40
100
ns typ
ns min
Write Pulse Width
55
80
55
100
ns typ
ns min
Chip Select Pulse Width
DD
= +12 V to +15 V;
2
V
SS
= O V or –12 V to –15 V;
2
See Figures 5 and 7.)
T Version
Units
Conditions
A, B Versions
Clear Pulse Width
NOTES
1
Sample tested at +25°C to ensure compliance.
2
Power supply tolerance is
±
10% for A Version and
±
5% for B and T Versions.
ABSOLUTE MAXIMUM RATINGS
1
V
DD
to AGND . . . . . . . . . . . . . . . . . . . . . . . . .–0.3 V to +17 V
V
DD
to DGND . . . . . . . . . . . . . . . . . . . . . . . . .–0.3 V to +17 V
V
DD
to V
SS
. . . . . . . . . . . . . . . . . . . . . . . . . . . .–0.3 V to +34 V
AGND to DGND . . . . . . . . . . . . . . . . . . . . . . . . . –0.3 V, V
DD
Digital Input Voltage to DGND . . . . . . . . –0.3 V, V
DD
+0.3 V
V
OUT
to AGND
2
. . . . . . . . . . . . . . . . . . . . . . . . . . . . V
SS
, V
DD
V
OUT
to V
SS2
. . . . . . . . . . . . . . . . . . . . . . . . . . . . . 0 V, +24 V
V
OUT
to V
DD2
. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . –32 V, 0 V
REF OUT
2
to AGND . . . . . . . . . . . . . . . . . . . . . . . . 0 V, V
DD
Power Dissipation (Any Package) to +75°C . . . . . . . . 450 mW
Derates above +75°C by . . . . . . . . . . . . . . . . . . . . 6 mW/°C
Operating Temperature
Commercial (A, B Versions) . . . . . . . . . . . –40°C to +85°C
Extended (S Version) . . . . . . . . . . . . . . . –55°C to +125°C
Storage Temperature . . . . . . . . . . . . . . . . . . –65°C to +150°C
Lead Temperature (Soldering, 10 secs) . . . . . . . . . . . . +300°C
NOTES
1
Stresses above those listed under “Absolute Maximum Ratings” may cause per-
manent damage to the device. This is a stress rating only and functional opera-
tion 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.
2
The output may be shorted to voltages in this range provided the power dissipa-
tion of the package is not exceeded. V
OUT
short circuit current is typically
80 mA.
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 AD7245A/AD7248A 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 function-
ality.
WARNING!
ESD SENSITIVE DEVICE
REV. A
–3–
AD [ ANALOG DEVICES ]
