■ DESCRIPTION

The MB40D001 is an 8-bit D/A converter with 12 built-in channels. The 12 sets of analog outputs have built-in OP amps to enable use with large current drive applications.

CS (chip select) data input/output format is used to enable connection to a serial bus. A built-in 12-bit I/O expander provides serial parallel conversion (8 of the 12 bits are also used with analog output).

The MB40D001 can be adapted for microcontroller port expansion, or replacement of electronic volume control or semi-fixed calibration resistance.

Also, the MB40D001 is function- and pin-compatible with the MB88146A, for easy replacement when reducing sysytem operating voltage.

■ FEATURES

• Supply voltage 2.7 V to 3.6 V (Power consumption 0.7 mW/ch typ.)

• Compact package: SSOP-24

• R-2R type 8-bit D/A converter with 12 built-in channels

• Built-in 12-bit I/O expander (8 of 12 bits also used with analog output)

• Built-in analog amplifier (sink current max. 0.4 mA, source current max. 1.0 mA)

• Built-in power-on detector circuit (detects VccD power-on, and performs initialization)

• Separate MCU interface power supply (VccD), OP amp supply (VccA), D/A converter supply VDD

• Analog output range 0 V to VccA.

• Serial data input/output operation to maximum of 2.5 MHz (1.5 MHz in cascade operation)

• CMOS process