Datasheet

AD7245A/AD7248A
REV. B
–3–
SWITCHING CHARACTERISTICS
1
Parameter A, B Versions T Version Unit Conditions
t
1
@ 25°C 55 55 ns typ Chip Select Pulsewidth
T
MIN
to T
MAX
80 100 ns min
t
2
@ 25°C 40 40 ns typ Write Pulsewidth
T
MIN
to T
MAX
80 100 ns min
t
3
@ 25°C 0 0 ns min Chip Select to Write Setup Time
T
MIN
to T
MAX
0 0 ns min
t
4
@ 25°C 0 0 ns min Chip Select to Write Hold Time
T
MIN
to T
MAX
0 0 ns min
t
5
@ 25°C 40 40 ns typ Data Valid to Write Setup Time
T
MIN
to T
MAX
80 80 ns min
t
6
@ 25°C 10 10 ns min Data Valid to Write Hold Time
T
MIN
to T
MAX
10 10 ns min
t
7
@ 25°C 40 40 ns typ Load DAC Pulsewidth
T
MIN
to T
MAX
80 100 ns min
t
8
(AD7245A Only)
@ 25°C 40 40 ns typ Clear Pulsewidth
T
MIN
to T
MAX
80 100 ns min
NOTES
1
Sample tested at 25°C to ensure compliance.
2
Power supply tolerance is ±10%.
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
SS
2
. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 0 V, 24 V
V
OUT
to V
DD
2
. . . . . . . . . . . . . . . . . . . . . . . . . . . . . –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 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.
2
The output may be shorted to voltages in this range provided the power dissipation
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 functionality.
WARNING!
ESD SENSITIVE DEVICE
(V
DD
= +12 V to +15 V;
2
V
SS
= 0 V to –12 V to –15 V;
2
See Figures 5 and 7.)