Datasheet > DOUBLE-BUFFEREDDTOACONVERTERS

DOUBLE-BUFFEREDDTOACONVERTERS

更新时间： 2024-09-20 23:47:51

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May 1999

DAC0830/DAC0832

8-Bit µP Compatible, Double-Buffered D to A Converters

General Description

Features

n Double-buffered, single-buffered or flow-through digital

data inputs

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 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.

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

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

Key Specifications

n Current settling time: 1 µs

™

microprocessor-compatible DACs (MICRO-DAC ).

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

DS005608-1

™

BI-FET and MICRO-DAC are trademarks of National Semiconductor Corporation.

Z80^®is a registered trademark of Zilog Corporation.

DS005608

www.national.com

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