DAC0830 Datasheet, PDF (1/28 Pages) National Semiconductor (TI) – 8-Bit P Compatible, Double-Buffered D to A Converters

March 2002
DAC0830/DAC0832
8-Bit µP 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^®, and other popular microprocessors. A deposited
silicon-chromium R-2R resistor ladder network divides the
reference current and provides the circuit with excellent
temperature tracking characteristics (0.05% of Full Scale
Range maximum linearity error over temperature). The cir-
cuit uses CMOS current switches and control logic to
achieve low power consumption and low output leakage
current errors. Special circuitry provides TTL logic input volt-
age level compatibility.
Double buffering allows these DACs to output a voltage
corresponding 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™).
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 — NOT BEST STRAIGHT LINE FIT.
n Works with ±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 “STAND ALONE” (without µP) if desired
n Available in 20-pin small-outline or molded chip carrier
package
Key Specifications
n Current settling time: 1 µs
n Resolution: 8 bits
n Linearity: 8, 9, or 10 bits (guaranteed over temp.)
n Gain Tempco: 0.0002% FS/˚C
n Low power dissipation: 20 mW
n Single power supply: 5 to 15 V_DC
Typical Application
BI-FET™ and MICRO-DAC™ are trademarks of National Semiconductor Corporation.
Z80^® is a registered trademark of Zilog Corporation.
© 2002 National Semiconductor Corporation DS005608
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