MP7542

FEATURES w 12-Bit DAC with a 4-Bit Parallel Address for 4 & 8-Bit Microprocessor or Microcontroller Interface Nonlinearity +1/2 LSB Tmin to Tmax Latch-Up Free Low Sensitivity to Output Amplifier VOS Low Output Capacitance w a D . w S a t e e h U 4 t m o .c MP7542 5 V CMOS 4-Bit Input, 12-Bit Digital-to-Analog Converter +5 V Supply Operation Low Power Consumption: 40mW Max. Low Cost Serial Version: MP7543 GENERAL DESCRIPTION The MP7542 is a precision, 12-bit CMOS 4-quadrant multiplying Digital-to-Analog Converter designed for direct interface to 4 and 8-bit microprocessors. The MP7542 consists of three 4-bit registers, a 12-bit DAC register, address decoding logic, and a 12-bit CMOS multiplying DAC. Data is loaded into the data registers in three 4-bit nibbles and subsequently transferred to the 12-bit DAC register. All data loading or data transfer operations are identical to the WRITE cycle of a static RAM. A CLEAR input allows the 12-bit DAC register to be reset to all zeros. The MP7542 is manufactured using advanced thin-film on monolithic double metal CMOS fabrication process. A unique decoding technique is utilized yielding excellent accuracy and stability. The MP7542 reduces the additional linearity errors due to output amplifier offset to only 330µV per millivolt of offset versus 670 µV for the standard R-2R ladder CMOS DACs. SIMPLIFIED BLOCK DIAGRAM CLR w Rev. 2.00 WR CS w .D w Address Decode Logic t a VREF S a e h t e U 4 .c...