REV. C

Information furnished by Analog Devices is believed to be accurate and

reliable. However, no responsibility is assumed by Analog Devices for its

use, nor for any infringements of patents or other rights of third parties

which may result from its use. No license is granted by implication or

otherwise under any patent or patent rights of Analog Devices.

a

12-Bit High Speed Multiplying

D/A Converter

DAC312

© Analog Devices, Inc., 1996

One Technology Way, P.O. Box 9106, Norwood, MA 02062-9106, U.S.A.

Tel: 617/329-4700

Fax: 617/326-8703

FEATURES

Differential Nonlinearity:

1/2 LSB

Nonlinearity: 0.05%

Fast Settling Time: 250 ns

High Compliance: –5 V to +10 V

Differential Outputs: 0 to 4 mA

Guaranteed Monotonicity: 12 Bits

Low Full-Scale Tempco: 10 ppm/ C

Circuit Interface to TTL, CMOS, ECL, PMOS/NMOS

Low Power Consumption: 225 mW

Industry Standard AM6012 Pinout

Available In Die Form

PIN CONNECTIONS

20-Pin Hermetic DIP (R-Suffix),

20-Pin Plastic DIP (P-Suffix),

20-Pin SOL (S-Suffix)

GENERAL DESCRIPTION

The DAC312 series of 12-bit multiplying digital-to-analog con-

verters provide high speed with guaranteed performance to

0.012% differential nonlinearity over the full commercial oper-

ating temperature range.

The DAC312 combines a 9-bit master D/A converter with a

3-bit (MSBs) segment generator to form an accurate 12-bit D/A

converter at low cost. This technique guarantees a very uniform

step size (up to

±1/2 LSB from the ideal), monotonicity to

12-bits and integral nonlinearity to 0.05% at its differential cur-

rent outputs. In order to provide the same performance with a

12-bit R-2R ladder design, an integral nonlinearity over tem-

perature of 1/2 LSB (0.012%) would be required.

The 250 ns settling time with low glitch energy and low power

consumption are achieved by careful attention to the circuit de-

sign and stringent process controls. Direct interface with all

popular logic families is achieved through the logic threshold

terminal.

FUNCTIONAL BLOCK DIAGRAM

High compliance and low drift characteristics (as low as

10 ppm/

°C) are also features of the DAC312 along with an ex-

cellent power supply rejection ratio of

±.001% FS/%∆V. Oper-

ating over a power supply range of +5/–11 V to

±18 V the

device consumes 225 mW at the lower supply voltages with an

absolute maximum dissipation of 375 mW at the higher supply

levels.

With their guaranteed specifications, single chip reliability and

low cost, the DAC312 device makes excellent building blocks

for A/D converters, data acquisition systems, video display driv-

ers, programmable test equipment and other applications where

low power consumption and complete input/output versatility

are required.