DAC8420 Datasheet, PDF (1/16 Pages) Analog Devices – Quad 12-Bit Serial Voltage Output DAC

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Quad 12-Bit Serial
Voltage Output DAC
FEATURES
Guaranteed Monotonic Over Temperature
Excellent Matching Between DACs
Unipolar or Bipolar Operation
Buffered Voltage Outputs
High Speed Serial Digital Interface
Reset to Zero- or Center-Scale
Wide Supply Range, +5 V-Only to ؎15 V
Low Power Consumption (35 mW max)
Available in 16-Pin DIP and SOL Packages
APPLICATIONS
Software Controlled Calibration
Servo Controls
Process Control and Automation
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GENERAL DESCRIPTION
The DAC8420 is a quad, 12-bit voltage-output DAC with serial
digital interface, in a 16-pin package. Utilizing BiCMOS tech-
nology, this monolithic device features unusually high circuit
density and low power consumption. The simple, easy-to-use
serial digital input and fully buffered analog voltage outputs
require no external components to achieve specified performance.
The three-wire serial digital input is easily interfaced to micro-
processors running at 10 MHz rates, with minimal additional
circuitry. Each DAC is addressed individually by a 16-bit serial
word consisting of a 12-bit data word and an address header.
The user-programmable reset control CLR forces all four DAC
outputs to either zero or midscale, asynchronously overriding
the current DAC register values. The output voltage range, de-
termined by the inputs VREFHI and VREFLO, is set by the
user for positive or negative unipolar or bipolar signal swings
within the supplies allowing considerable design flexibility.
DAC8420
FUNCTIONAL BLOCK DIAGRAM
SDI 10
CS 12
CLK 11
NC 13
VREFHI
5
RREEGG _{DAC A}
AA
12
VDD
1
7 VOUTA
SHIFT
REGISTER
REG _{DAC B}
B
6 VOUTB
4
REG _{DAC C}
C
3 VOUTC
LD 14
DECODE
2
REG _{DAC D}
D
2 VOUTD
9
GND
16 15
CLSEL CLR
4
VREFLO
8
VSS
The DAC8420 is available in 16-pin epoxy DIP, cerdip, and
wide-body SOL (small-outline surface mount) packages. Opera-
tion is specified with supplies ranging from +5 V-only to ± 15 V,
with references of +2.5 V to ± 10 V respectively. Power dissipa-
tion when operating from ± 15 V supplies is less than 255 mW
(max), and only 35 mW (max) with a +5 V supply.
For applications requiring product meeting MIL-STD-883,
contact your local sales office for the DAC8420/883 data sheet,
which specifies operation over the –55°C to +125°C tempera-
ture range.
REV. 0
Information furnished by Analog Devices is believed to be accurate and
reliable. However, no responsibility is assumed by Analog Devices for its
use, nor for any infringements of patents or other rights of third parties
which may result from its use. No license is granted by implication or
otherwise under any patent or patent rights of Analog Devices.
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