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PT8146 V1.1

- 1 -

February, 2006

8-Bit 12-Ch I/O DAC

PT8146

DESCRIPTION

The PT8146 is an 8-bit D/A converter with 12 built-in channels. Each of the 12 analog outputs have a

built-in OP amplifier with large current drive capability. The data input/output format is chip select (/CS)

with serial bus connection available while a built-in 12-bit I/O expander enables serial-parallel

conversion (8 of the 12 bits can also be used for analog output).

FEATURES

• Ultra compact package

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

• 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 1.0mA maximum, source current 1.0mA maximum)

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

• MCU interface compatible with 3V to 5V 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 2.5MHz (in cascade connection, up to 2.5MHz when

VccD=5V, up to 1.5Mhz when VccD=3V)

• CMOS process

• Available in 24 pin, SSOP Package

APPLICATIONS

• Microcontroller port expansion

• Electronic level adjustment

• Replacement of semi-fixed resistance for tuning