Datasheet

AD7242/AD7244
REV. A
–4–
WARNING!
ESD SENSITIVE DEVICE
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 AD7242/AD7244 feature 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.
TIMING CHARACTERISTICS
1, 2
Limit at T
MIN
, T
MAX
Limit at T
MIN
, T
MAX
Parameter (J, K, A, B Versions) (S Version) Units Conditions/Comments
t
1
50 50 ns min TFS to TCLK Falling Edge
t
2
75 100 ns min TCLK Falling Edge to TFS
t
3
3
150 200 ns min TCLK Cycle Time
t
4
30 40 ns min Data Valid to TCLK Setup Time
t
5
75 100 ns min Data Valid to TCLK Hold Time
t
6
40 40 ns min LDAC Pulse Width
NOTES
1
Timing specifications 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 volt-
age level of 1.6 V.
2
See Figure 6.
3
TCLK Mark/Space ratio is 40/60 to 60/40.
ABSOLUTE MAXIMUM RATINGS*
(T
A
= +25°C unless otherwise noted)
V
DD
to AGND . . . . . . . . . . . . . . . . . . . . . . . . . –0.3 V to +7 V
V
SS
to AGND . . . . . . . . . . . . . . . . . . . . . . . . . +0.3 V to –7 V
AGND to DGND . . . . . . . . . . . . . . . . –0.3 V to V
DD
+ 0.3 V
V
OUT
to AGND . . . . . . . . . . . . . . . . . . . . . . . . . . . . V
SS
to V
DD
REF OUT to AGND . . . . . . . . . . . . . . –0.3 V to V
DD
+ 0.3 V
REF INA, REF INB to AGND . . . . . . . –0.3 V to V
DD
+ 0.3 V
Digital Inputs to DGND . . . . . . . . . . . . –0.3 V to V
DD
+ 0.3 V
Operating Temperature Range
J, K Versions
AD7244 . . . . . . . . . . . . . . . . . . . . . . . . . . . 0°C to +70°C
AD7242 . . . . . . . . . . . . . . . . . . . . . . . . . –40°C to +85°C
A, B Versions . . . . . . . . . . . . . . . . . . . . . . . –40°C to +85°C
S Version . . . . . . . . . . . . . . . . . . . . . . . . . –55°C to +125°C
(V
DD
= +5 V 6 5%, V
SS
= –5 V 6 5%, AGND = DGND = 0 V)
PIN CONFIGURATIONS
Storage Temperature Range . . . . . . . . . . . . –65°C to +150°C
Lead Temperature (Soldering, 10 sec) . . . . . . . . . . . . +300°C
Power Dissipation (Any Package) to +75°C . . . . . . . 550 mW
Derates above +75°C by . . . . . . . . . . . . . . . . . . . . . 6 mW/°C
*Stresses above those listed under “Absolute Maximum Ratings” may cause
permanent 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.
DIP
SOIC