LPC1768: DAC Programming Revision as of 18:13, 21 April 2016 by Explorer (Talk | contribs) (diff) ← Older revision | Latest revision (diff) | Newer revision → (diff)

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.

LPC7168 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.

Adc Channel	Port Pin	Pin Functions	Associated PINSEL Register
AD3	P0.26	0-GPIO, 1-AD0[3], 2-AOUT, 3-RXD3	20,21 bits of PINSEL1

$$Output voltage of DAC = (Vref * InputValue)/MAX_VALUE = (3.3 * InputValue)/1023 = InputValue * 3.22 mv.$$