REV. B
AD1555/AD1556
–8–
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 AD1555/AD1556 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
ABSOLUTE MAXIMUM RATINGS
1
Analog Inputs
Pins 7, 8, 23, 24, 25, 28 . . . . . . –V
A
– 0.3 V to +V
A
+ 0.3 V
AIN(+), AIN(–) DC Input Current . . . . . . . . . . . ± 100 mA
AIN(+), AIN(–) 2 µs Pulse Input Current . . . . . . . . ±1.5 A
Supply Voltages
+V
A
to –V
A
. . . . . . . . . . . . . . . . . . . . . . . . . –0.3 V to +14 V
+V
A
to AGND . . . . . . . . . . . . . . . . . . . . . . . –0.3 V to +7 V
–V
A
to AGND . . . . . . . . . . . . . . . . . . . . . . . –7 V to +0.3 V
V
L
to DGND . . . . . . . . . . . . . . . . . . . . . . . . –0.3 V to +7 V
Ground Voltage Differences
DGND, AGND1, AGND2, AGND3 . . . . . . . . . . . ±0.3 V
Digital Inputs . . . . . . . . . . . . . . . . . . . . –0.3 V to V
L
+ 0.3 V
Internal Power Dissipation
2
AD1555 . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 1.8 W
AD1556 . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 1.8 W
Junction Temperature . . . . . . . . . . . . . . . . . . . . . . . . . 150°C
Storage Temperature . . . . . . . . . . . . . . . . . . –65°C to +150°C
Lead Temperature Range
(Soldering 10 sec) . . . . . . . . . . . . . . . . . . . . . . . . . . 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 indicated in the operational
section of this specification is not implied. Exposure to absolute maximum rating
conditions for extended periods may affect device reliability.
2
Specification is for device in free air:
28-lead PLCC: θ
JA
= 36°C/W, θ
JC
= 20°C/W
44-lead MQFP: θ
JA
= 36°C/W, θ
JC
= 14°C/W
ORDERING GUIDE
Temperature Package Package
Model Range* Description Option
AD1555AP 0°C to 85°C Plastic Lead Chip Carrier P-28A
AD1555APRL 0°C to 85°C Plastic Lead Chip Carrier P-28A
AD1555BP –55°C to +85 °C Plastic Lead Chip Carrier P-28A
AD1555BPRL –55°C to +85 °C Plastic Lead Chip Carrier P-28A
AD1556AS –55°C to +85 °C Plastic Quad Flatpack S-44A
AD1556ASRL –55°C to +85 °C Plastic Quad Flatpack S-44A
EVAL-AD1555/AD1556EB
Evaluation Board
AD1555/56-REF Reference Design
*Contact factory for extended temperature range.
