■ DESCRIPTION

The MB88111 is an analog-to-digital converter that converts its analog input to a 10-bit digital value and outputs it as serial data.

The MB88111 employs a successive approximation method for A/D conversion. It has 24 input channels to be A/D converted selectively by setting in an internal register.

Since the MB88111 can input and output 16-bit serial data in synchronization with the clock, it can be easily connected to the serial I/O port in a 16-bit microcontroller.

■ FEATURES

• 24-channel analog input

• RC-type successive approximation system with a sample-and-hole circuit

• 10-bit resolution

• Conversion speed within 50 µs (at a system clock rate of 1 MHz)

• Digitally converted data output from the MSB

• Digitally converted data output as 16-bit serial data

• Clock-synchronous serial transfer system

• Internal extended serial interface

• Capable of triggering A/D conversion through an external pin

• Capable of input through an 8-channel port

• Serial data output format selectable using an external pin

• 10-bit monotonicity

• No missing code

• Power supply voltage ranging from 3.5 to 5.5 V

• Operating temperature ranging from –40 to +50°C

• CMOS process

• Package options of 44-pin QFP and 48-pin SH-DIP