AD7228A

a 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 LC2MOS Octal 8-Bit DAC AD7228A FUNCTIONAL BLOCK DIAGRAM GENERAL DESCRIPTION The AD7228A contains eight 8-bit voltage-mode 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 eight D/A converters. Data is transferred into the data latches through a common 8-bit TTL/CMOS (5 V) compatible input port. Address 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 kΩ load. The AD7228A is fabricated on an all ion-implanted, highspeed, Linear Compatible CMOS (LC2MOS) process which has been specifically developed to integrate high-speed digital logic circuits and precision analog circuits on the same chip. PRODUCT HIGHLIGHTS 1. Eight DACs and Amplifiers in...