Datasheet

AD7537
REV.
–3–
TIMING CHARACTERISTICS
Limit at Limit at
Limit at T
A
= –40ⴗCT
A
= +55ⴗC
Parameter T
A
= +25ⴗC to +85ⴗC to +125ⴗC Units Test Conditions/Comments
t
1
15 15 30 ns min Address Valid to Write Setup Time
t
2
15 15 25 ns min Address Valid to Write Hold Time
t
3
60 80 80 ns min Data Setup Time
t
4
25 25 25 ns min Data Hold Time
t
5
0 0 0 ns min Chip Select or Update to Write Setup Time
t
6
0 0 0 ns min Chip Select or Update to Write Hold Time
t
7
80 80 100 ns min Write Pulse Width
t
8
80 80 100 ns min Clear Pulse Width
Specifications subject to change without notice.
ABSOLUTE MAXIMUM RATINGS*
(T
A
= +25°C unless otherwise stated)
V
DD
to DGND . . . . . . . . . . . . . . . . . . . . . . . . . .–0.3 V, +17 V
V
REFA
, V
REFB
to AGNDA, AGNDB . . . . . . . . . . . . . . . . ±25 V
V
RFBA
, V
RFBB
to AGNDA, AGNDB . . . . . . . . . . . . . . . . ±25 V
Digital Input Voltage to DGND . . . . . . . –0.3 V, V
DD
+0.3 V
I
OUTA
, I
OUTB
to DGND . . . . . . . . . . . . . . –0.3 V, V
DD
+0.3 V
AGNDA, AGNDB to DGND . . . . . . . . . –0.3 V, V
DD
+0.3 V
Power Dissipation (Any Package)
To +75°C . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 450 mW
Derates Above +75°C . . . . . . . . . . . . . . . . . . . . . 6 mW/°C
Operating Temperature Range
Commercial Plastic (J, K, L Versions) . . . . –40°C to +85°C
Industrial Hermetic (A, B, C Versions) . . . –40°C to +85°C
Extended Hermetic (S, T, U Versions) . . –55°C to +125°C
Storage Temperature . . . . . . . . . . . . . . . . –65°C to +150°C
Lead Temperature (Soldering, 10 sec) . . . . . . . . . . . . +300°C
*Stresses above those listed under “Absolute Maximum Ratings” may cause
permanent damage to the device. This is a stress rating only and functional
operation of the device at these or any other conditions above those indicated in
the operational sections of this specification is not implied. Exposure to absolute
maximum rating conditions for extended periods may affect device reliability.
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 AD7537 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.
Figure 1. Timing Diagram
(V
DD
= +10.8 V to +16.5 V, V
REFA
= V
REFB
= +10 V; I
OUTA
= AGNDA = 0 V, I
OUTB
= AGNDB = 0 V.)
A