AD7937AR View Datasheet(PDF) - Analog Devices
Part Name
Description
MFG CO.
AD7937AR Datasheet PDF : 8 Pages
| |||
AD7937
TIMING CHARACTERISTICS (VDD = 5 V ؎ 10%, VREFA = VREFB = 10 V; IOUTA = AGNDA = 0 V, IOUTB = AGNDB = 0 V.)
Parameter
Limit at
TA = 25؇C
Limit at
TA = –40؇C
to +85؇C
Unit
Test Conditions/Comments
t1
10
10
ns min
Address Valid to Write Setup Time
t2
10
10
ns min
Address Valid to Write Hold Time
t3
20
40
ns min
Data Setup Time
t4
30
30
ns min
Data Hold Time
t5
0
0
ns min
Chip Select or Update to Write Setup Time
t6
0
0
ns min
Chip Select or Update to Write Hold Time
t7
115
125
ns min
Write Pulsewidth
t8
90
100
ns min
Clear Pulsewidth
Specifications subject to change without notice.
ABSOLUTE MAXIMUM RATINGS*
(TA = 25°C unless otherwise noted)
VDD to DGND . . . . . . . . . . . . . . . . . . . . . . . . . . –0.3 V, +17 V
VREFA, VREFB to AGNDA, AGNDB . . . . . . . . . . . . . . . . ± 25 V
VRFBA, VRFBB to AGNDA, AGNDB . . . . . . . . . . . . . . . . ± 25 V
Digital Input Voltage to DGND . . . . . . . –0.3 V, VDD +0.3 V
IOUTA, IOUTB to DGND . . . . . . . . . . . . . . –0.3 V, VDD +0.3 V
AGNDA, AGNDB to DGND . . . . . . . . . –0.3 V, VDD +0.3 V
SOIC Package
θJA, Thermal Impedance . . . . . . . . . . . . . . . . . . . . 72°C/W
Lead Temperature (Soldering, 10 sec) . . . . . . . . . . . . 300°C
IR Ref Low Peak Temperature . . . . . . . . . . . . . . . . . . 220°C
Operating Temperature Range
Industrial (A, B Versions) . . . . . . . . . . . . . –40°C to +85°C
Storage Temperature . . . . . . . . . . . . . . . . –65°C to +150°C
*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
sections of this specification is not implied. Exposure to absolute maximum rating
conditions for extended periods may affect device reliability.
A0–A1
DATA
CS, UPD
WR
CLR
t1
t2
5V
0V
t3
t4
5V
0V
t5
t6
5V
0V
t7
5V
0V
t8
5V
0V
NOTES
1. ALL INPUT SIGNAL RISE AND FALL TIMES MEASURED
2.
FROM 10% TO 90% OF +5V. tr = tf = 20ns.
TIMING MEASUREMENT REFERENCE LEVELS
IS
VIH +
2
VIL
Figure 1. Timing Diagram
Model
AD7937AR
AD7937BR
Temperature Range
–40°C to +85°C
–40°C to +85°C
ORDERING GUIDE
Relative Accuracy
± 1 LSB
± 1/2 LSB
Gain Error
± 6 LSB
± 3 LSB
Package Description
Small Outline
Small Outline
Option
R-24
R-24
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 AD7937 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. 0
–3–
Share Link: 