AD7837 Analog Devices, AD7837 Datasheet - Page 3

• Manufacturer Part Number: AD7837
• Description: LC2MOS Complete, Dual 12-Bit MDAC, (8 + 4) Loading Structure
• Manufacturer: Analog Devices

Specifications of AD7837

• Resolution (bits): 12bit
• Dac Update Rate: 250kSPS
• Dac Settling Time: 4µs
• Max Pos Supply (v): +15.75V
• Single-supply: No
• Dac Type: Voltage Out
• Dac Input Format: Byte

TIMING CHARACTERISTICS
Parameter
t
t
t
t
t
t
t
t
NOTES
1
2
3
4
ABSOLUTE MAXIMUM RATINGS
(T
V
V
V
AGNDA, AGNDB to DGND . . . . . . . –0.3 V to V
V
R
Digital Inputs to DGND . . . . . . . . . . . –0.3 V to V
Operating Temperature Range
Storage Temperature Range . . . . . . . . . . . . –65°C to +150°C
Lead Temperature (Soldering, 10 secs) . . . . . . . . . . . . . 300°C
Power Dissipation (Any Package) to +75°C . . . . . . 1000 mW
Derates above +75°C by . . . . . . . . . . . . . . . . . . . . 10 mW/°C
NOTES
1
2
3
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 these devices feature 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.
All input signals are specified with tr = tf = 5 ns (10% to 90% of 5 V) and timed from a voltage level of 1.6 V.
See Figures 3 and 5.
Guaranteed by design and characterization, not production tested.
AD7837 only.
If V
positive, exceeding the Absolute Maximum Ratings. If this possibility exists, a
Schottky diode connected between V
the Maximum Ratings will be observed.
The outputs may be shorted to voltages in this range provided the power dissipation
of the package is not exceeded.
AD7837 only.
nent 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 condi-
tions for extended periods may affect device reliability. Only one Absolute
Maximum Rating may be applied at any one time.
1
2
3
4
5
6
7
8
Stresses above those listed under Absolute Maximum Ratings may cause perma-
4
4
4
DD
SS
REFA
OUTA
FBA
A
Commercial/Industrial (A, B Versions) . . . –40°C to +85°C
Extended (S Version) . . . . . . . . . . . . . . . . –55°C to +125°C
. . . . . . . . . . . . . . . . . . . . . . . . . . V
. . . . . . . . . . . . . . . . . . . . . . . . . . V
. . . . . . . . . . . . . . . . . . . . . . . . . . V
= +25°C unless otherwise noted)
1
SS
3
to DGND, AGNDA, AGNDB . . . . . . . –0.3 V to +17 V
to DGND, AGNDA, AGNDB . . . . . . . +0.3 V to –17 V
is open circuited with V
, R
, V
2
, V
FBB
REFB
OUTB
3
to AGNDA, AGNDB
to AGNDA, AGNDB
2
to AGNDA, AGNDB
DD
and either AGND applied, the V
SS
Limit at T
(All Versions)
0
0
30
80
0
0
0
50
and AGND (cathode to AGND) ensures
SS
SS
SS
1, 2, 3
– 0.3 V to V
– 0.3 V to V
– 0.3 V to V
MIN
, T
(V
MAX
DD
= +15 V
DD
DD
DD
DD
DD
SS
pin will float
+ 0.3 V
+ 0.3 V
+ 0.3 V
+ 0.3 V
+ 0.3 V
5%, V
SS
Model
AD7837AN
AD7837BN
AD7837AR
AD7837BR
AD7837AQ
AD7837BQ
AD7837SQ
AD7847AN
AD7847BN
AD7847AR
AD7847BR
AD7847AQ
AD7847BQ
AD7847SQ
NOTES
1
2
To order MIL-STD-883, Class B processed parts, add /883B to part number.
N = Plastic DIP; Q = Cerdip; R = SOIC.
= –15 V
Unit
ns min
ns min
ns min
ns min
ns min
ns min
ns min
ns min
1
5%, AGNDA = AGNDB = DGND = O V)
Temperature
Range
–40°C to +85°C
–40°C to +85°C
–40°C to +85°C
–40°C to +85°C
–40°C to +85°C
–40°C to +85°C
–55°C to +125°C
–40°C to +85°C
–40°C to +85°C
–40°C to +85°C
–40°C to +85°C
–40°C to +85°C
–40°C to +85°C
–55°C to +125°C
ORDERING GUIDE
Conditions/Comments
CS to WR Setup Time
CS to WR Hold Time
WR Pulsewidth
Data Valid to WR Setup Time
Data Valid to WR Hold Time
Address to WR Setup Time
Address to WR Hold Time
LDAC Pulsewidth
AD7837/AD7847
WARNING!
Relative
Accuracy
± 1 LSB
± 1/2 LSB
± 1 LSB
± 1/2 LSB
± 1 LSB
± 1/2 LSB
± 1 LSB
± 1 LSB
± 1/2 LSB
± 1 LSB
± 1/2 LSB
± 1 LSB
± 1/2 LSB
± 1 LSB
ESD SENSITIVE DEVICE
Package
Option
N-24
N-24
R-24
R-24
Q-24
Q-24
Q-24
N-24
N-24
R-24
R-24
Q-24
Q-24
Q-24
2