DAC8412 Datasheet, PDF (1/14 Pages) Analog Devices – Quad, 12-Bit DAC Voltage Output with Readback

a
Quad, 12-Bit DAC
Voltage Output with Readback
DAC8412/DAC8413
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
Readback
APPLICATIONS
Automatic Test Equipment
Digitally Controlled Calibration
Servo Controls
Process Control Equipment
GENERAL DESCRIPTION
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.
Output voltage swing is set by the two reference inputs V_REFH
and V_REFL. By setting the V_REFL input to 0 V and V_REFH to a
positive voltage, the DAC will provide a unipolar positive output
range. A similar configuration with V_REFH at 0 V and V_REFL at
a negative voltage will provide a unipolar negative output range.
Bipolar outputs are configured by connecting both V_REFH and
V_REFL 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.
FUNCTIONAL BLOCK DIAGRAM
V_LOGIC
V_DD V_REFH
DATA ¹²
I/O
I/O
PORT
INPUT
REG A
OUTPUT
REG A
DAC A
V_OUTA
DGND
A0
A1
R/W
CS
CONTROL
LOGIC
INPUT
REG B
INPUT
REG C
INPUT
REG D
OUTPUT
REG B
OUTPUT
REG C
OUTPUT
REG D
DAC B
DAC C
DAC D
V_OUTB
V_OUTC
V_OUTD
RESET
LDAC
V_REFL V_SS
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.
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.
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
0.250
+25؇C
+125؇C
0.125
0
–0.125
–55؇C
–0.250
–0.375
V_DD = +15V
V_SS = –15V
V_REFH = +10V
V_REFL = –10V
T_A = –55؇C, +25؇C, +125؇C
–0.500
0
512 1024 1536 2046 2548 2560
DIGITAL INPUT CODE – Decimal
3072
4096
Figure 1. INL vs. Code Over Temperature
REV. D
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