PT8146 Datasheet, PDF (1/27 Pages) Princeton Technology Corp – 8-Bit 12-Ch I/O DAC

8-Bit 12-Ch I/O DAC
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URL: http://www.princeton.com.tw
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
PT8146 V1.1
-1-
February, 2006