1)ADC的输入与DAC的输出直接关联,你需要检查一下,DAC的带载能力,或ADC输入阻抗的的大小,尤其是再采样期间。 2)如果两者电路上无直接关联, 那是否ADC与DAC公用的基准源的电压有波动,当采样时。或两者的供电电源。
在使用MSP430的内部ADC和DAC时,我发现用内部DAC给外部电路提供给定值,经过一系列的变化后转换成相应的电压值或者电流值,然后用内部的ADC采样这些电流值或者电压值,我发现每次ADC采样都会对DAC的输出造成影响,ADC每采样一次值,DAC的输出就会出现一个向下的尖刺,而每次ADC采样的值就是尖刺的波谷。我一直不知道...
Connecting a DAC to the microcontroller Generating a saw-tooth wave using DAC #include <avr/io.h> int main (void) { unsigned char i = 0; //define a counter DDRD = 0xFF; //make Port D an output while (1) //do forever PORTD = i;//copy i into PORTD to be converted i++;//i...
Few microcontrollers include a DAC. Although you can easily find an inexpensive DAC to control from your microcontroller, you can use unused peripherals instead of adding parts. Fortunately, you can convert a microcontroller's ADC channel along with a GPIO (general-purpose input/ output) pin into...
SigmaDSP 28/56位音频处理器, 内置2个ADC和4个DAC ADAU1401 特性 28/56位,50 MIPS数字音频处理器 2个ADC:SNR为100 dB,THD + N为−83 dB 4个DAC:SNR为104 dB,THD + N为−90 dB 完全独立工作 从串行EEPROM自引导 辅助ADC配有4路输入多路复用器,用于模拟控制 GPIO用于数字控制和输出 可利用...
Microcontroller ARM7TDMI Core, 16/32-bit RISC architecture JTAG Port supports code download and debug Clocking options: - Trimmed On-Chip Oscillator - External Watch crystal - External clock source 45MHz PLL with Programmable Divider Memory 62k Bytes Flash/EE Memory, 8k Bytes SRAM In-Circuit ...
If the input is higher than the DAC, the comparator will output a 1 to be stored in the MSB in the “successive approximation register”. After this the DAC will be set to ¼ of its potential voltage and the process repeats. The next value for the DAC would be 1/8 then 1/16 ...
2. Configure ADC to measure the DAC output↑ 2.1. Objectives↑ Learn how to set up the ADC with DMA in STM32CubeMX. Generate code in STM32CubeMX and using HAL functions. Create a simple application to start the ADC and measure the DAC output. 2.2. Create the project in STM32CubeIDE...
Sigma-delta ADC采用1位DAC、滤波和附加采样来实现非常精确的转换,转换精度取决于参考输入和输入时钟频率。 Sigma -delta转换器的主要优势在于其较高的分辨率。 闪速和逐次逼近ADC采用并联电阻或串联电阻,这些方法的问题在于电阻的精确度将直接影响转换结果的精确度。
Re: High performance ADC and DAC Post by adafruit_support_mike » Sun Feb 21, 2016 4:53 am That will let the DAC and ADC float relative to the microcontroller, but make sure you have plenty of filtering on the isolated side. Any switching converter generates noise, even across a tr...