AD7242/AD7244
TIMING CHARACTERISTICS1, 2
(VDD = +5 V ؎ 5%, VSS = –5 V ؎ 5%, AGND = DGND = 0 V)
Limit at TMIN, TMAX
Limit at TMIN, TMAX
Parameter
(J, K, A, B Versions)
(S Version)
Units
Conditions/Comments
t1
t23
t3
t4
t5
t6
50
75
150
30
75
40
50
ns min
ns min
ns min
ns min
ns min
ns min
TFS to TCLK Falling Edge
TCLK Falling Edge to TFS
TCLK Cycle Time
Data Valid to TCLK Setup Time
Data Valid to TCLK Hold Time
LDAC Pulse Width
100
200
40
100
40
NOTES
1Timing 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.
2See Figure 6.
3TCLK Mark/Space ratio is 40/60 to 60/40.
ABSOLUTE MAXIMUM RATINGS*
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
(TA = +25°C unless otherwise noted)
VDD 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 VDD + 0.3 V
OUT to AGND . . . . . . . . . . . . . . . . . . . . . . . . . . . . VSS to VDD
*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.
V
REF OUT to AGND . . . . . . . . . . . . . . –0.3 V to VDD + 0.3 V
REF INA, REF INB to AGND . . . . . . . –0.3 V to VDD + 0.3 V
Digital Inputs to DGND . . . . . . . . . . . . –0.3 V to VDD + 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
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.
WARNING!
ESD SENSITIVE DEVICE
PIN CONFIGURATIONS
DIP
SOIC
REV. A
–4–
ADI [ ADI ]
