Datasheet

AD7782
–5–
ABSOLUTE MAXIMUM RATINGS *
(T
A
= 25°C unless otherwise noted)
V
DD
to GND . . . . . . . . . . . . . . . . . . . . . . . . . . . –0.3 V to +7 V
Analog Input Voltage to GND . . . . . . . . –0.3 V to V
DD
+ 0.3 V
Reference Input Voltage to GND . . . . . –0.3 V to V
DD
+ 0.3 V
Total AIN/REFIN Current (Indefinite) . . . . . . . . . . . . . 30 mA
Digital Input Voltage to GND . . . . . . . . –0.3 V to V
DD
+ 0.3 V
Digital Output Voltage to GND . . . . . . –0.3 V to V
DD
+ 0.3 V
Operating Temperature Range . . . . . . . . . . . . –40°C to +85°C
Storage Temperature Range . . . . . . . . . . . . . –65°C to +150°C
Junction Temperature . . . . . . . . . . . . . . . . . . . . . . . . . . 150°C
TSSOP Package
θ
JA
Thermal Impedance . . . . . . . . . . . . . . . . . . . . .97.9°C/W
θ
JC
Thermal Impedance . . . . . . . . . . . . . . . . . . . . . . 14°C/W
Lead Temperature, Soldering
Vapor Phase (60 sec) . . . . . . . . . . . . . . . . . . . . . . . . . 215°C
Infrared (15 sec) . . . . . . . . . . . . . . . . . . . . . . . . . . . . 220°C
*Stresses above those listed under Absolute Maximum Ratings may cause per-
manent 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.
CH1/CH2 (I)
CS (I)
DOUT/RDY
SLAVE MODE
SCLK (I)
MASTER MODE
SCLK (O)
I = INPUT TO AD7782, O = OUTPUT FROM AD7782
t
2
t
3
t
4
t
5
t
6
t
7
t
5
t
11
t
6
t
7
t
9
t
8
MSB LSB LSBMSB
t
10
Figure 2. Slave/Master Mode Timing Diagram
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 AD7782 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
REV. A
MASTER MODE IS SELECTED BY TYING THE MODE PIN LOW, WHEREAS SLAVE MODE IS SELECTED BY TYING THE MODE PIN HIGH.