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AD7228ABQ Fiches technique(PDF) 1 Page - Analog Devices |
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AD7228ABQ Fiches technique(HTML) 1 Page - Analog Devices |
1 / 8 page REV. A 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 LC2MOS Octal 8-Bit DAC AD7228A One Technology Way, P.O. Box 9106, Norwood, MA 02062-9106, U.S.A. Tel: 617/329-4700 Fax: 617/326-8703 FUNCTIONAL BLOCK DIAGRAM PRODUCT HIGHLIGHTS 1. Eight DACs and Amplifiers in Small Package The single-chip design of eight 8-bit DACs and amplifiers al- lows a dramatic reduction in board space requirements and offers increased reliability in systems using multiple convert- ers. Its pinout is aimed at optimizing board layout with all analog inputs and outputs at one side of the package and all digital inputs at the other. 2. Single or Dual Supply Operation The voltage-mode configuration of the DACs allows single supply operation of the AD7228A. The part can also be oper- ated with dual supplies giving enhanced performance for some parameters. 3. Microprocessor Compatibility The AD7228A has a common 8-bit data bus with individual DAC latches, providing a versatile control architecture for simple interface to microprocessors. All latch enable signals are level triggered and speed compatible with most high per- formance 8-bit microprocessors. FEATURES Eight 8-Bit DACs with Output Amplifiers Operates with Single +5 V, +12 V or +15 V or Dual Supplies P 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 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 eight D/A converters. Data is transferred into the data latches through a common 8-bit TTL/CMOS (5 V) compatible input port. Ad- dress inputs A0, A1 and A2 determine which latch is loaded when WR goes low. The control logic is speed compatible with most 8-bit microprocessors. Specified performance is guaranteed for input reference voltages from +2 to +10 V when using dual supplies. The part is also specified for single supply +15 V operation using a reference of +10 V and single supply +5 V operation using a reference of +1.23 V. Each output buffer amplifier is capable of developing +10 V across a 2 k Ω load. The AD7228A is fabricated on an all ion-implanted, high- speed, Linear Compatible CMOS (LC 2MOS) process which has been specifically developed to integrate high-speed digital logic circuits and precision analog circuits on the same chip. |
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Description similaire - AD7228ABQ |
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