Quad, 12-Bit, Parallel Input,
Unipolar/Bipolar, Voltage Output DAC
Data Sheet
AD5725
FEATURES
FUNCTIONAL BLOCK DIAGRAM
AV
AV
V
REFP
+5 V to 15 V operation
SS
DD
Unipolar or bipolar operation
0.5 LSB max INL error, 1 LSB max DNL error
Settling time: 10 µs max (10 V step)
Double-buffered inputs
V
L
12
12
12
12
12
INPUT
REG A
DAC
DAC A
DAC B
DAC C
DAC D
V
V
V
V
A0
A1
OUTA
OUTB
OUTC
OUTD
REG A
I/O
REGISTER
AND
R/W
CS
CONTROL
LOGIC
INPUT
REG B
DAC
REG B
LDAC
Simultaneous updating via
CLR
Asynchronous
Readback
to zero/mid scale
INPUT
REG C
DAC
REG C
12
DB0
TO
DB11
Operating temperature range: −40°C to +85°C
iCMOS® process technology
INPUT
REG D
DAC
REG D
AD5725
APPLICATIONS
V
DGND
CLR
LDAC
REFN
Industrial automation
Figure 1.
Closed-loop servo control, process control
Automotive test and measurement
Programmable logic controllers
GENERAL DESCRIPTION
The AD5725 is a quad, 12-bit, parallel input, voltage output
digital-to-analog converter that offers guaranteed monotonicity,
integral nonlinearity (INL) of 0.5 LSB maximum and 10 µs
maximum settling time.
Digital controls allow the user to load or read back data from
any DAC, load any DAC, and transfer data to all DACs at
one time.
The AD5725 is available in a 28-lead SSOP package. It can be
operated from a wide variety of supply and reference voltages,
with supplies ranging from single +5 V to 15 V, and references
from +2.5 V to 10 V. Power dissipation is less than 270 mW
with 15 V supplies and only 40 mW with a +5 V supply.
Operation is specified over the temperature range of −40°C
to +85°C.
Output voltage swing is set by two reference inputs, VREFP and
V
REFN. By setting the VREFN input to 0 V and the VREFP to a
positive voltage, the DAC provides a unipolar positive output
range. A similar configuration with VREFP at 0 V and VREFN at a
negative voltage provides a unipolar negative output range.
Bipolar outputs are configured by connecting both VREFP and
V
REFN to nonzero voltages. This method of setting output voltage
ranges has advantages over the bipolar offsetting methods
because it is not dependent on internal and external resistors
with different temperature coefficients.
iCMOS® Process Technology
For analog systems designers within industrial/instrumentation equipment OEMs who need high performance ICs at higher-voltage levels, iCMOS is a technology
platform that enables the development of analog ICs capable of 30 V and operating at 15 V supplies while allowing dramatic reductions in power consumption and
package size, and increased ac and dc performance.
Rev. C
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