DAC1232LCJ1 National Semiconductor, DAC1232LCJ1 Datasheet

DAC1232LCJ1

Manufacturer Part Number

DAC1232LCJ1

Description

DIP-20

Manufacturer

National Semiconductor

Datasheet

1.DAC1231LCN.pdf (18 pages)

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C 1995 National Semiconductor Corporation

MICRO-DAC

DAC1231 DAC1232 12-Bit

Double-Buffered D to A Converters

General Description

The DAC1208 and the DAC1230 series are 12-bit multiply-

ing D to A converters designed to interface directly with a

wide variety of microprocessors (8080 8048 8085 Z-80

etc ) Double buffering input registers and associated con-

trol lines allow these DACs to appear as a two-byte ‘‘stack’’

in the system’s memory or I O space with no additional in-

terfacing logic required

The DAC1208 series provides all 12 input lines to allow sin-

gle buffering for maximum throughput when used with 16-bit

processors These input lines can also be externally config-

ured to permit an 8-bit data interface The DAC1230 series

can be used with an 8-bit data bus directly as it internally

formulates the 12-bit DAC data from its 8 input lines All of

these DACs accept left-justified data from the processor

The analog section is a precision silicon-chromium (Si-Cr)

R-2R ladder network and twelve CMOS current switches

An inverted R-2R ladder structure is used with the binary

weighted currents switched between the I

maintaining a constant current in each ladder leg indepen-

dent of the switch state Special circuitry provides TTL logic

input voltage level compatibility

The DAC1208 series and DAC1230 series are the 12-bit

members of a family of microprocessor compatible DACs

(MICRO-DACs

tions the DAC1000 series for 10-bit and DAC0830 series

for 8-bit are available alternatives

Typical Application

TRI-STATE is a registered trademark of National Semiconductor Corp

MICRO-DAC

is a trademark of National Semiconductor Corp

) For applications requiring other resolu-

TL H 5690

DAC1208 DAC1209 DAC1210 DAC1230

OUT1

and I

OUT2

P Compatible

Features

Key Specifications

Linearity specified with zero and full-scale adjust only

Direct interface to all popular microprocessors

Double-buffered single-buffered or flow through digital

data inputs

Logic inputs which meet TTL voltage level specs (1 4V

logic threshold)

Works with

multiplication

Operates stand-alone (without P) if desired

All parts guaranteed 12-bit monotonic

DAC1230 series is pin compatible with the DAC0830

series 8-bit MICRO-DACs

Current Settling Time

Resolution

Linearity (Guaranteed

over temperature)

Gain Tempco

Low Power Dissipation

Single Power Supply

10V reference full 4-quadrant

10 11 or 12 Bits of FS

RRD-B30M115 Printed in U S A

5 V

TL H 5690 – 1

February 1995

1 3 ppm C

to 15 V

20 mW

12 Bits

1 s

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