AD7836_15 Datasheet, PDF (1/12 Pages) Analog Devices – LC MOS Quad 14-Bit DAC

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FEATURES
Four 14-Bit DACs in One Package
Voltage Outputs
Separate Offset Adjust for Each Output
Reference Range of ؎5 V
Maximum Output Voltage Range of ؎10 V
Clear Function to User-Defined Code
44-Pin MQFP Package
APPLICATIONS
Process Control
Automatic Test Equipment
General Purpose Instrumentation
LC²MOS
Quad 14-Bit DAC
AD7836
GENERAL DESCRIPTION
The AD7836 contains four 14-bit DACs on one monolithic
chip. It has output voltages with a full-scale range of ± 10 V
from reference voltages of ± 5 V.
The AD7836 accepts 14-bit parallel loaded data from the exter-
nal bus into one of the input latches under the control of the
WR, CS and DAC channel address pins, A0–A2.
The DAC outputs are updated individually, on reception of new
data. In addition, the SEL input can be used to apply the user
programmed value in DAC Register E to all DACs, thus setting
all DAC output voltages to the same level. The contents of the
DAC data registers are not affected by the SEL input.
Each DAC output is buffered with a gain of two amplifier into
which an external DAC offset voltage can be inserted via the
DUTGNDx pins.
The AD7836 is available in a 44-lead MQFP package.
FUNCTIONAL BLOCK DIAGRAM
V_CC V_SS V_DD
V_REF(+)A V_REF(–)A V_REF(+)B V_REF(–)B
AD7836
14 DATA 14
REG
A
14 MUX
DB13
DB0
WR
CS
14
14
INPUT
BUFFER
A0
A1
ADDRESS
DECODE
A2
DATA
REG
B
DATA
REG
C
DATA
REG
D
MUX
MUX
MUX
X1
X1
DAC A
DAC D
X1
X1
DAC B
DAC B
X1
X1
DGND AGND
DATA
REG
E
X1
X1
SEL V_REF(+)D V_REF(–)D V_REF(+)C V_REF(–)C _CLR
V_OUTA
R
R
DUTGND A
V_OUTB
R
R
DUTGND B
V_OUTC
R
R
DUTGND C
V_OUTD
R
R
DUTGND D
REV. A
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