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| 型號(hào)： | AD8582AR |
| 廠商： | ANALOG DEVICES INC |
| 元件分類： | DAC |
| 英文描述： | +5 Volt, Parallel Input Complete Dual 12-Bit DAC |
| 中文描述： | DUAL, PARALLEL, WORD INPUT LOADING, 16 us SETTLING TIME, 12-BIT DAC, PDSO24 |
| 封裝： | SOIC-24 |
| 文件頁數(shù)： | 1/8頁 |
| 文件大?。?/td> | 309K |
| 代理商： | AD8582AR |
AD8582
One Technology Way, P.O. Box 9106, Norwood. MA 02062-9106, U.S.A.
Tel: 617/329-4700
Fax: 617/326-8703
a
FUNCT IONAL BLOCK DIAGRAM
REV. 0
Information furnished by Analog Devices is believed to be accurate and
reliable. However, no responsibility is assumed by Analog Devices for its
use, nor for any infringements of patents or other rights of third parties
which may result from its use. No license is granted by implication or
otherwise under any patent or patent rights of Analog Devices.
T he high speed parallel data interface connects to the fastest
processors without wait states. T he double-buffered input struc-
ture allows the user to load the input registers one at a time,
then a single load strobe tied to both LDA + LDB inputs will
update both DAC outputs simultaneously. LDA and LDB can
also be activated independently to immediately update their re-
spective DAC registers. An address input decodes DAC A or
DAC B when the chip select
CS
input is strobed. An asynchro-
nous reset input sets the output to zero scale. T he MSB bit can
be used to establish a preset to midscale when the reset input is
strobed.
T he AD8582 is available in the 24-pin plastic DIP and the sur-
face mount SOIC-24. Each part is fully specified for operation
over –40
°
C to +85
°
C, and the full +5 V
±
5% power supply
range.
FEATURES
Complete Dual 12-Bit DAC
No External Components
Single +5 Volt Operation
1 mV/Bit with 4.095 V Full Scale
True Voltage Output,
±
5 mA Drive
Very Low Power: 5 mW
APPLICATIONS
Digitally Controlled Calibration
Portable Equipment
Servo Controls
Process Control Equipment
PC Peripherals
+5 Volt, Parallel Input
Complete Dual 12-Bit DAC
GE NE RAL DE SCRIPT ION
T he AD8582 is a complete, parallel input, dual 12-bit, voltage
output DAC designed to operate from a single +5 volt supply.
Built using a CBCMOS process, this monolithic DAC offers the
user low cost, and ease-of-use in +5 volt only systems.
Included on the chip, in addition to the DACs, are a rail-to-rail
amplifier, latch and reference. T he reference (V
REF
) is trimmed
to 2.5 volts output, and the on-chip amplifier gains up the DAC
output to 4.095 volts full scale. T he user needs only supply a +5
volt supply.
T he AD8582 is coded natural binary. T he op amp output
swings from 0 volt to +4.095 volts for a one-millivolt-per-bit
resolution, and is capable of driving
±
5 mA. Operation down to
4.3 V is possible with output load currents less than 1 mA.
DATA
REFERENCE
12-BIT
DAC A
DAC A
REGISTER
INPUT A
REGISTER
12-BIT
DAC B
DAC B
REGISTER
INPUT B
REGISTER
12
12
2
12
V
DD
V
OUTA
V
OUTB
V
REF
AGND
DGND
MSB
RST
LDA
CS
A/B
LDB
AD8582
OUTPUT LOAD CURRENT – mA
V
D
5.0
4.4
4.0
0.01
0.1
100
10
1.0
4.2
4.6
4.8
VFS
≤
1 LSB
DATA = FFF
H
T
A
= +25
°
C
PROPER OPERATION
WHEN V
SUPPLY
VOLTAGE ABOVE
CURVE
Figure 1. Minimum Supply Voltage vs. Load
2.0
–2.0
4096
–1.0
–1.5
0
0.0
–0.5
0.5
1.0
1.5
3072
2048
1024
DIGITAL INPUT CODE – Decimal
L
V
DD
= +5V
T
A
= –55°C, +25°C, +85°C
= +25°C & +85°C
= –55°C
Figure 2. Linearity Error vs. Digital Code and Temperature
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