Quad, 12-Bit DAC
Voltage Output with Readback
Data Sheet
DAC8412/DAC8413
FEATURES
FUNCTIONAL BLOCK DIAGRAM
V
V
V
REFH
LOGIC
DD
+5 V to 15 V operation
Unipolar or bipolar operation
True voltage output
Double-buffered inputs
Reset to minimum (DAC8413) or center scale (DAC8412)
Fast bus access time
12
I/O
PORT
DATA
I/O
INPUT
REG A
OUTPUT
REG A
V
DAC A
DAC B
DAC C
DAC D
OUTA
OUTB
DGND
INPUT
REG B
OUTPUT
REG B
V
A0
A1
INPUT
REG C
OUTPUT
REG C
V
V
CONTROL
LOGIC
OUTC
Readback
R/W
CS
INPUT
REG D
OUTPUT
REG D
OUTD
APPLICATIONS
RESET
LDAC
Automatic test equipment
Digitally controlled calibration
Servo controls
V
V
REFL
SS
Figure 1.
Process control equipment
GENERAL DESCRIPTION
They 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
330 mW with 15 V supplies and only 60 mW with a +5 V supply.
The DAC8412/DAC8413 are quad, 12-bit voltage output
DACs with readback capability. Built using a complementary
BiCMOS process, these monolithic DACs offer the user very
high package density.
For MIL-STD-883 applications, contact your local Analog
Devices, Inc. sales office for the DAC8412/DAC8413/883 data
sheet, which specifies operation over the −55°C to +125°C
temperature range. All 883 parts are also available on Standard
Military Drawings 5962-91 76401MXA through 76404M3A.
0.500
Output voltage swing is set by the two reference inputs VREFH
and VREFL. By setting the VREFL input to 0 V and VREFH to a
positive voltage, the DAC provides a unipolar positive output
range. A similar configuration with VREFH at 0 V and VREFL at a
negative voltage provides a unipolar negative output range.
Bipolar outputs are configured by connecting both VREFH and
V
REFL to nonzero voltages. This method of setting output voltage
0.375
0.250
0.125
+125°C
range has advantages over other bipolar offsetting methods
because it is not dependent on internal and external resistors
with different temperature coefficients.
+25°C
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.
0
–0.125
–0.250
–0.375
–0.500
–55°C
RESET
An active low
loads all DAC output registers to midscale
V
V
V
V
T
= +15V
= –15V
DD
SS
for the DAC8412 and zero scale for the DAC8413.
= +10V
= –10V
REFH
REFL
The DAC8412/DAC8413 are available in 28-lead plastic DIP,
28-lead cerami c DI P, 28-lead PLCC, and 28-lead LCC packages.
= –55°C, +25°C, +125°C
A
0
512
1024 1536 2046 2548 2560
DIGITAL INPUT CODE (Decimal)
3072 4096
Figure 2. INL vs. Code Over Temperature
Rev. G
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