2 LC MOS a Octal 8-Bit DAC AD7228A FEATURES FUNCTIONAL BLOCK DIAGRAM Eight 8-Bit DACs with Output Amplifiers Operates with Single +5 V, +12 V or +15 V or Dual Supplies mP Compatible (95 ns WR Pulse) No User Trims Required Skinny 24-Pin DlPs, SOIC, and 28-Terminal Surface Mount Packages GENERAL DESCRIPTION The AD7228A contains eight 8-bit voltage-mode digital-to- analog converters, with output buffer amplifiers and interface PRODUCT HIGHLIGHTS logic on a single monolithic chip. No external trims are required 1. Eight DACs and Amplifiers in Small Package to achieve full specified performance for the part. The single-chip design of eight 8-bit DACs and amplifiers al- Separate on-chip latches are provided for each of the eight D/A lows a dramatic reduction in board space requirements and converters. Data is transferred into the data latches through a offers increased reliability in systems using multiple convert- common 8-bit TTL/CMOS (5 V) compatible input port. Ad- ers. Its pinout is aimed at optimizing board layout with all dress inputs A0, A1 and A2 determine which latch is loaded analog inputs and outputs at one side of the package and all when WR goes low. The control logic is speed compatible with digital inputs at the other. most 8-bit microprocessors. 2. Single or Dual Supply Operation Specified performance is guaranteed for input reference voltages The voltage-mode configuration of the DACs allows single from +2 to +10 V when using dual supplies. The part is also supply operation of the AD7228A. The part can also be oper- specified for single supply +15 V operation using a reference of ated with dual supplies giving enhanced performance for +10 V and single supply +5 V operation using a reference of some parameters. +1.23 V. Each output buffer amplifier is capable of developing 3. Microprocessor Compatibility +10 V across a 2 k load. The AD7228A has a common 8-bit data bus with individual The AD7228A is fabricated on an all ion-implanted, high- DAC latches, providing a versatile control architecture for 2 speed, Linear Compatible CMOS (LC MOS) process which has simple interface to microprocessors. All latch enable signals been specifically developed to integrate high-speed digital logic are level triggered and speed compatible with most high per- circuits and precision analog circuits on the same chip. formance 8-bit microprocessors. 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 One Technology Way, P.O. Box 9106, Norwood, MA 02062-9106, U.S.A. which may result from its use. No license is granted by implication or otherwise under any patent or patent rights of Analog Devices. Tel: 781/329-4700 Fax: 781/461-3113AD7228A* PRODUCT PAGE QUICK LINKS Last Content Update: 02/23/2017 COMPARABLE PARTS DISCUSSIONS View a parametric search of comparable parts. View all AD7228A EngineerZone Discussions. DOCUMENTATION SAMPLE AND BUY Data Sheet Visit the product page to see pricing options. 2 AD7228A: LC MOS Octal 8-Bit DAC Data Sheet TECHNICAL SUPPORT Submit a technical question or find your regional support DESIGN RESOURCES number. AD7228A Material Declaration PCN-PDN Information DOCUMENT FEEDBACK Quality And Reliability Submit feedback for this data sheet. Symbols and Footprints This page is dynamically generated by Analog Devices, Inc., and inserted into this data sheet. A dynamic change to the content on this page will not trigger a change to either the revision number or the content of the product data sheet. This dynamic page may be frequently modified.