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DAC8248GP Datasheet

  • DAC8248GP

  • Dual 12-Bit 8-Bit Byte Double-Buffered CMOS D/A Converter

  • 351.72KB

  • 16頁

  • AD

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a
Dual 12-Bit (8-Bit Byte)
Double-Buffered CMOS D/A Converter
DAC8248
PIN CONNECTIONS
24-Pin 0.3" Cerdip (W Suffix),
24-Pin Epoxy DIP (P Suffix),
24-Pin SOL (S Suffix)
FEATURES
Two Matched 12-Bit DACs on One Chip
12-Bit Resolution with an 8-Bit Data Bus
Direct Interface with 8-Bit Microprocessors
Double-Buffered Digital Inputs
RESET
to Zero Pin
12-Bit Endpoint Linearity ( 1/2 LSB) Over Temperature
5 V to 15 V Single Supply Operation
Latch-Up Resistant
Improved ESD Resistance
Packaged in a Narrow 0.3" 24-Pin DIP and 0.3" 24-Pin
SOL Package
Available in Die Form
APPLICATIONS
Multichannel Microprocessor-Controlled Systems
Robotics/Process Control/Automation
Automatic Test Equipment
Programmable Attenuator, Power Supplies, Window
Comparators
Instrumentation Equipment
Battery Operated Equipment
GENERAL DESCRIPTION
The DAC8248鈥檚 double-buffered digital inputs allow both
DAC鈥檚 analog output to be updated simultaneously. This is par-
ticularly useful in multiple DAC systems where a common
LDAC
signal updates all DACs at the same time. A single
RESET
pin resets both outputs to zero.
The DAC8248鈥檚 monolithic construction offers excellent DAC-
to-DAC matching and tracking over the full operating tempera-
ture range. The DAC consists of two thin-film R-2R resistor
ladder networks, two 12-bit, two 8-bit, and two 4-bit data regis-
ters, and control logic circuitry. Separate reference input and
feedback resistors are provided for each DAC. The DAC8248
(continued on page 4)
The DAC8248 is a dual 12-bit, double-buffered, CMOS digital-
to-analog converter. It has an 8-bit wide input data port that inter-
faces directly with 8-bit microprocessors. It loads a 12-bit word in
two bytes using a single control; it can accept either a least signifi-
cant byte or most significant byte first. For designs with a 12-bit or
16-bit wide data path, choose the DAC8222 or DAC8221.
FUNCTIONAL BLOCK DIAGRAM
REV. B
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.
One Technology Way, P.O. Box 9106, Norwood, MA 02062-9106, U.S.A.
Tel: 617/329-4700
Fax: 617/326-8703

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