Quad, 12-Bit DAC
Voltage Output with Readback
a
DAC8412/DAC8413
FUNCTIONAL BLOCK DIAGRAM
FEATURES
+5 V to ؎15 V Operation
Unipolar or Bipolar Operation
True Voltage Output
Double-Buffered Inputs
Reset to Min (DAC8413) or Center Scale (DAC8412)
Fast Bus Access Time
V
V
V
REFH
LOGIC
DD
12
I/O
DATA
I/O
INPUT
REG A
OUTPUT
REG A
DAC A
DAC B
V
V
V
V
PORT
OUTA
OUTB
OUTC
OUTD
DGND
INPUT
REG B
OUTPUT
REG B
A0
A1
Readback
INPUT
REG C
OUTPUT
REG C
CONTROL
LOGIC
DAC C
DAC D
R/W
APPLICATIONS
Automatic Test Equipment
Digitally Controlled Calibration
Servo Controls
CS
INPUT
REG D
OUTPUT
REG D
RESET
LDAC
Process Control Equipment
V
V
SS
REFL
GENERAL DESCRIPTION
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 DAC8412 and 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.
An active low RESET loads all DAC output registers to mid-
scale for the DAC8412 and zero scale for the DAC8413.
The DAC8412/DAC8413 are available in 28-lead plastic DIP,
PLCC and LCC packages. 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.
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 will provide a unipolar positive output
range. A similar configuration with VREFH at 0 V and VREFL at
a negative voltage will provide a unipolar negative output range.
Bipolar outputs are configured by connecting both VREFH and
VREFL to nonzero voltages. This method of setting output voltage
range has advantages over other bipolar offsetting methods because
it is not dependent on internal and external resistors with different
temperature coefficients.
For MIL-STD-883 applications, contact your local ADI 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
0.375
+125؇C
+25؇C
0.250
0.125
0
–55؇C
–0.125
V
V
V
V
= +15V
= –15V
DD
SS
–0.250
–0.375
–0.500
= +10V
= –10V
REFH
REFL
T
= –55؇C, +25؇C, +125؇C
A
0
512 1024
1536
2046
2548 2560
3072
4096
DIGITAL INPUT CODE – Decimal
Figure 1. INL vs. Code Over Temperature
REV. D
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