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AD7226

Analog Devices
Part Number AD7226
Manufacturer Analog Devices
Description Quad 8-Bit D/A Converter
Published Mar 23, 2005
Detailed Description FEATURES Four 8-Bit DACs with Output Amplifiers Skinny 20-Lead DIP, SOIC, SSOP, and PLCC Packages Microprocessor-Compati...
Datasheet PDF File AD7226 PDF File

AD7226
AD7226

Overview
FEATURES Four 8-Bit DACs with Output Amplifiers Skinny 20-Lead DIP, SOIC, SSOP, and PLCC Packages Microprocessor-Compatible TTL/CMOS-Compatible No User Trims Extended Temperature Range Operation Single Supply Operation Possible APPLICATIONS Process Control Automatic Test Equipment Automatic Calibration of Large System Parameters, e.
g.
, Gain/Offset LC2MOS Quad 8-Bit D/A Converter AD7226 FUNCTIONAL BLOCK DIAGRAM VREF VDD LATCH A MSB DATA (8-BIT) LSB D A LATCH B T A B U LATCH C S LATCH D WR CONTROL A1 LOGIC A0 DAC A A DAC B B DAC C C DAC D D AD7226 VSS AGND AGND VOUTA VOUTB VOUTC VOUTD GENERAL DESCRIPTION The AD7226 contains four 8-bit voltage-output digital-toanalog converters, with output buffer amplifiers and interface logic on a single monolithic chip.
No external trims are required to achieve full specified performance for the part.
Separate on-chip latches are provided for each of the four D/A converters.
Data is transferred into one of these data latches through a common 8-bit TTL/CMOS (5 V) compatible input port.
Control inputs A0 and A1 determine which DAC is loaded when WR goes low.
The control logic is speed-compatible with most 8-bit microprocessors.
Each D/A converter includes an output buffer amplifier capable of driving up to 5 mA of output current.
The amplifiers’ offsets are laser-trimmed during manufacture, thereby eliminating any requirement for offset nulling.
Specified performance is guaranteed for input reference voltages from 2 V to 12.
5 V with dual supplies.
The part is also specified for single supply operation at a reference of 10 V.
The AD7226 is fabricated in an all ion-implanted high speed Linear Compatible CMOS (LC2MOS) process, which has been specifically developed to allow high speed digital logic circuits and precision analog circuits to be integrated on the same chip.
PRODUCT HIGHLIGHTS 1.
DAC-to-DAC Matching Since all four DACs are fabricated on the same chip at the same time, precise matching and tracking b...


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