MP7542

1

Rev. 2.00

FEATURES

• 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 Output Capacitance

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 multi-

plying 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 reg-

ister 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 330

670

SIMPLIFIED BLOCK DIAGRAM

12-Bit Multiplying DAC

12-Bit DAC Register

H-Byte

Data

Register

M-Byte

Data

Register

L-Byte

Data

Register

Address

Decode

Logic

A0

A1

AGND

DB1

DB2

DB3 (MSB)

DGND

DB0 (LSB)

CLR

WR

CS