LPC1768: DAC Programming

Objective

In this tutorial we are going to discuss how to use the inbuilt LPC1768 DAC.
Finally we will see how to use the ExploreEmbedded DAC libraries.

LPC1768 DAC Module

Lpc1768 has in built DAC with following features.

1. 10-bit digital to analog converter
2. Resistor string architecture
3. Buffered output
4. Power-down mode
5. Selectable speed vs. power
6. Maximum update rate of 1 MHz.

DAC Channel	Port Pin	Pin Functions	Associated PINSEL Register
Aout	P0.26	0-GPIO, 1-AD0[3], 2-AOUT , 3-RXD3	20,21 bits of PINSEL1

$$DAC Output = (Vref * InputValue)/MaxValue = (3.3 * InputValue)/1023 = InputValue * 3.22 mv.$$