■ DESCRIPTION

The MB88146A is an 8-bit D/A converter with twelve built-in channels. The 12 analog outputs each have a builtin OP amplifier with large current drive-capability.

The data input/output format is CS (chip select) with serial bus connection available.

A built-in 12-bit I/O expander enables serial ↔ parallel conversion (8 of the 12 bits can also be used for analog output).

This product can be used for microcontroller port expansion, electronic level adjustment, replacement of semi-fixed resistance for tuning, etc.

■ FEATURES

• Ultra low power consumption (1.2 mW/chl: typical)

• Ultra compact package

• Built-in 12-channel R-2R type 8-bit D/A converter

• Built-in 12-bit I/O expander (8 bits also function as analog output)

• Built-in analog output amplifier (sink current 1.0 mA maximum, source current 1.0 mA maximum)

• Built-in power-on detection circuit (initialized at detection of VccD power-on)

• MCU interface compatible with 3 V to 5 V systems

• Power divided into MCU interface power supply (VccD) and OP amplifier power supply (VccA), D/A converter power supply (VccD)

• Analog output capability from 0 V to VccA

• Serial data I/O operates to maximum of 2.5 MHz (in cascade connection, up to 2.5 MHz when VccD = 5 V, up to 1.5 MHz when VccD = 3 V)

• CMOS process

• Choice of two packages: SDIP-24 pin and SSOP-24 pin.