TLH5691

December 1994

DAC1218DAC1219

12-Bit Binary Multiplying DA Converter

General Description

The DAC1218 and the DAC1219 are 12-bit binary 4-quad-

rant multiplying D to A converters The linearity differential

non-linearity and monotonicity specifications for these con-

verters are all guaranteed over temperature In addition

these parameters are specified with standard zero and full-

scale adjustment procedures as opposed to the impractical

best fit straight line guarantee

This level of precision is achieved though the use of an

advanced silicon-chromium (SiCr) R-2R resistor ladder net-

work This type of thin-film resistor eliminates the parasitic

diode problems associated with diffused resistors and al-

25V independent of the logic supply voltage

CMOS current switches and drive circuitry are used to

achieve low power consumption (20 mW typical) and mini-

mize output leakage current errors (10 nA maximum)

Unique digital input circuitry maintains TTL compatible input

threshold voltages over the full operating supply voltage

range

The DAC1218 and DAC1219 are direct replacements for

the AD7541 series AD7521 series and AD7531 series with

a significant improvement in the linearity specification In

applications where direct interface of the D to A converter to

a microprocessor bus is desirable

the DAC1208 and

DAC1230 series eliminate the need for additional interface

logic

Features

Y

Linearity specified with zero and full-scale adjust only

Y

Logic inputs which meet TTL voltage level specs (14V

logic threshold)

Y

multiplication

Y

All parts guaranteed 12-bit monotonic

Key Specifications

Y

Current Settling Time

1 ms

Y

Resolution

12 Bits

Y

Linearity (Guaranteed

12 Bits (DAC1218)

over temperature)

11 Bits (DAC1219)

Y

Gain Tempco

15 ppm C

Y

Low Power Dissipation

20 mW

Y

Single Power Supply

Typical Application

TLH5691 – 1

4096

J

Connection Diagram

Dual-In-Line Package

TLH5691 – 15

Top View

Ordering Information

Temperature Range

b

Package Outline

Non

0012%

DAC1218LCJ-1

DAC1218LCJ

J18A Cerdip

Linearity

0024%

DAC1219LCJ

J18A Cerdip

C1995 National Semiconductor Corporation

RRD-B30M115Printed in U S A