AD7937 Analog Devices, AD7937 Datasheet - Page 3

• Manufacturer Part Number: AD7937
• Description: LC2MOS 8+4 Loading Dual 12-Bit DAC
• Manufacturer: Analog Devices

TIMING CHARACTERISTICS
Parameter
t
t
t
t
t
t
t
t
Specifications subject to change without notice.
ABSOLUTE MAXIMUM RATINGS
(T
V
V
V
Digital Input Voltage to DGND . . . . . . . –0.3 V, V
I
AGNDA, AGNDB to DGND . . . . . . . . . –0.3 V, V
SOIC Package
Lead Temperature (Soldering, 10 sec) . . . . . . . . . . . . 300°C
IR Ref Low Peak Temperature . . . . . . . . . . . . . . . . . . 220°C
Operating Temperature Range
Model
AD7937AR
AD7937BR
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.
1
2
3
4
5
6
7
8
OUTA
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.
DD
REFA
RFBA
A
θ
Industrial (A, B Versions) . . . . . . . . . . . . . –40°C to +85°C
Storage Temperature . . . . . . . . . . . . . . . . –65°C to +150°C
= 25°C unless otherwise noted)
JA
to DGND . . . . . . . . . . . . . . . . . . . . . . . . . . –0.3 V, +17 V
, Thermal Impedance . . . . . . . . . . . . . . . . . . . . 72°C/W
, I
, V
, V
OUTB
REFB
RFBB
to DGND . . . . . . . . . . . . . . –0.3 V, V
to AGNDA, AGNDB . . . . . . . . . . . . . . . . ± 25 V
to AGNDA, AGNDB . . . . . . . . . . . . . . . . ± 25 V
Temperature Range
–40°C to +85°C
–40°C to +85°C
Limit at
T
10
10
20
30
0
0
115
90
A
= 25 C
(V
DD
Limit at
T
to +85 C
10
10
40
30
0
0
125
100
Relative Accuracy
± 1 LSB
± 1/2 LSB
= 5 V
A
= –40 C
DD
DD
DD
10%, V
ORDERING GUIDE
+0.3 V
+0.3 V
+0.3 V
REFA
= V
Unit
ns min
ns min
ns min
ns min
ns min
ns min
ns min
ns min
REFB
CS, UPD
A0–A1
DATA
= 10 V; I
CLR
Gain Error
± 6 LSB
± 3 LSB
WR
OUTA
NOTES
1. ALL INPUT SIGNAL RISE AND FALL TIMES MEASURED
2. TIMING MEASUREMENT REFERENCE LEVELS IS
FROM 10% TO 90% OF +5V. t
= AGNDA = 0 V, I
Test Conditions/Comments
Address Valid to Write Setup Time
Address Valid to Write Hold Time
Data Setup Time
Data Hold Time
Chip Select or Update to Write Setup Time
Chip Select or Update to Write Hold Time
Write Pulsewidth
Clear Pulsewidth
t
1
t
Package Description
Small Outline
Small Outline
5
OUTB
t
7
t
3
= AGNDB = 0 V.)
r
WARNING!
= t
f
t
= 20ns.
t
2
4
t
6
ESD SENSITIVE DEVICE
AD7937
V
IH
t
8
+ V
2
Option
R-24
R-24
IL
5V
0V
5V
5V
5V
0V
5V
0V
0V
0V