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DOUBLE-BUFFEREDDTOACONVERTERS Datasheet

  • DOUBLE-BUFFEREDDTOACONVERTERS

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DAC0830/DAC0832 8-Bit 碌P Compatible, Double-Buffered D to A Converters
May 1999
DAC0830/DAC0832
8-Bit 碌P Compatible, Double-Buffered D to A Converters
General Description
The DAC0830 is an advanced CMOS/Si-Cr 8-bit multiplying
DAC designed to interface directly with the 8080, 8048,
8085, Z80
廬
, and other popular microprocessors. A deposited
silicon-chromium R-2R resistor ladder network divides the
reference current and provides the circuit with excellent tem-
perature tracking characteristics (0.05% of Full Scale Range
maximum linearity error over temperature). The circuit uses
CMOS current switches and control logic to achieve low
power consumption and low output leakage current errors.
Special circuitry provides TTL logic input voltage level com-
patibility.
Double buffering allows these DACs to output a voltage cor-
responding to one digital word while holding the next digital
word. This permits the simultaneous updating of any number
of DACs.
The DAC0830 series are the 8-bit members of a family of
microprocessor-compatible DACs (MICRO-DAC
鈩?/div>
).
Features
n
Double-buffered, single-buffered or flow-through digital
data inputs
n
Easy interchange and pin-compatible with 12-bit
DAC1230 series
n
Direct interface to all popular microprocessors
n
Linearity specified with zero and full scale adjust
only 鈥?NOT BEST STRAIGHT LINE FIT.
n
Works with
鹵
10V reference-full 4-quadrant multiplication
n
Can be used in the voltage switching mode
n
Logic inputs which meet TTL voltage level specs (1.4V
logic threshold)
n
Operates 鈥淪TAND ALONE鈥?(without 碌P) if desired
n
Available in 20-pin small-outline or molded chip carrier
package
Key Specifications
n
n
n
n
n
n
Current settling time: 1 碌s
Resolution: 8 bits
Linearity: 8, 9, or 10 bits (guaranteed over temp.)
Gain Tempco: 0.0002% FS/藲C
Low power dissipation: 20 mW
Single power supply: 5 to 15 V
DC
Typical Application
DS005608-1
BI-FET
鈩?/div>
and MICRO-DAC
鈩?/div>
are trademarks of National Semiconductor Corporation.
Z80
廬
is a registered trademark of Zilog Corporation.
漏 1999 National Semiconductor Corporation
DS005608
www.national.com

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