REV. C
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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: 61/2 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/8C
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.
