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Questions tagged [dac]

A DAC is a Digital to Analog Converter.

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0answers
39 views

16 bit parallel to analog waveform [on hold]

I have 16 bit output from 16 output port of my fpga which is digital equivalent of a analog sample. those bits are coming at high rate parallel. I want to make the analog waveform from those 16 bits. ...
0
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1answer
33 views

Cap in Series with a DAC Reverse Current

I'm using a 8-bit DAC: (DAC5311IDCKR) to generate a 1.5V Amplitude sine wave with a 3.5VDC offset. I've put high-pass RC filter across it shown below to block DC so that it becomes AC. I understand ...
1
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1answer
50 views

Can I use a voltage controlled resistor to adjust high side switch current?

A number of high-side switches (e.g. the NCP380) go into constant-current mode when the programmed maximum current is reached. This is typically set with an external resistor according to the required ...
0
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0answers
14 views

Naming confusion, how to connect DAC (BB/TI PCM1603KY) I2S, which pins do I need to use?

I am totally new in the field of DAC's and I2S. I salvaged this board from a DVD player and is well documented. There are three data lines DATA1..DATA3 that will be used for ...
0
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2answers
132 views

New Amazon music streaming service and Nyquist sampling theorem [closed]

I read this story on The Verge the other day, “It’s a better bitrate, better than CD quality,” said one of MBW’s sources, indicating the new service will put Amazon in direct competition with Tidal’...
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2answers
102 views

0-3.3V to 0-5V step by step [closed]

I have a 3.3V microcontroller. I want to use dac. I will work 0-5V range. But my microcontroller has max voltage 3.3v. I want to use a amplifier. I wait your recommendation. note: how can i this. ...
0
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1answer
23 views

Dual DAC channel selection in PIC

I need to communicate with this DUAL DAC by using SPI : MAX 5223 Dual DAC There are 2 DAC outputs in this chip and I am confused that how can I select and write to the specific one. There is CS pin ...
0
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1answer
28 views

CS43L22 DMA constant beep noise

I am using CS43L22 with STM32F4 discovery board. I generate sounds by sending I2S messages to CS43L22 using circular DMA buffer (32 size array). However, chip creates a constant beep whether it's ...
0
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1answer
77 views

I want to create a stable 0-10 V DC output from a 3.3V PWM signal (arduino/esp8266)

I want to control an EC motor, but I have some difficulties with the motor's control input. According to my measurements it has a ~50kOhm input impedance, and probably also has an (unknown) RC low-...
1
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3answers
116 views

Trying to recover audio from PWM

I am trying to make a Raspberry pi Bluetooth receiver. I finally got the raspberry pi to output audio via bluetooth, however the output seems like it is a modulated PWM. The width of the PWM seems to ...
0
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1answer
54 views

Paralleling Multibit current DAC: Improving Accuracy by Averaging

No doubt that if I put in parallel n DACs, multibit (i.e. 16 bit) current output R2R ladder chips, I get n-times higher current at the summing node and the output impedance is also reduced by "n". ...
0
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1answer
24 views

ML06 Micro To Micro USB wiring

I tried to DIY to make a custom cable like the one in link: https://www.fiio.co.in/collections/accessories/products/ml06-micro-to-micro-usb-data-cable?variant=12395665326185 I bought 2 normal usb ...
0
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1answer
34 views

Which PCM data format to choose I2S or Left-Justified? [closed]

I can't find any information which PCM data format is better - I2S or Left-Justified and why I should use one format over another. Is there a difference or it doesn't matter which one I'll use?
1
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1answer
61 views

Current-to-voltage opamp in DAC application: snubber network between inputs

In transimpedance (or current-to-voltage) opamp application for DAC, it is reccomended to put at the opamp inputs a capacitor (together with a snubber RC network through the feedback resistor), in ...
0
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1answer
78 views

No output voltage from TI DAC chip, with stm32F7

I am using DAC60508 with my STM32F7, 60508 is 12 bits precision, and with 24 bits command-length, SPI interface. After initialize the SPI, I send 3 bytes separately, and I use a oscilloscope to check ...
0
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0answers
38 views

Allowing different inputs without needing to alter gain every time; a situation for a pre-amp?

The goal I am attempting to make a small diy bookshelf speaker system using 2 16ohm, 25 watt speakers and a 2x25 watt class d amplifier board. If it matters, the amplifier board is a class d amplifier....
0
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0answers
14 views

Single Ended DAC to Differential Input Modulator

I'm trying to drive a differential input IQ modulator (LT5571) with a single ended DAC (MCP4912) for modulation of a narrow band signal (~10kHz max). Because of the nature of the low frequency ...
1
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1answer
50 views

Understanding Ports on DAC

So I am working with this DAC and I am trying to attach reference voltages and outputs, but I am confused. Looking at this image of the board, what is the connection to VOUT ? How do I connect to ...
0
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0answers
47 views

Effects of a voltage divider on an audio DAC

Background: I'm planning on using a TI TS5A22364 SPDT Switch with Negative Signaling to connect AGND to the Left and Right Channels of the TI PCM5102A Audio DAC when the DAC is powered down as an ...
1
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2answers
46 views

DAC offset error vs. output low voltage

I am looking at the datasheet for the MCP4725 DAC and trying to find the minimum voltage the DAC will output. In other words, when my code tells the DAC to output 0v, what will the output be? There ...
0
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2answers
62 views

Analogue signal generation: Which is better Standalone or PWM DAC?

Most controller/processor come with PWM output and integrated standalone DAC module.... My need is to generate 50/60Hz analog signal for testing purpose! Which would be the good choice PWM DAC or ...
0
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2answers
45 views

Change range of data acquisition system

I have a DAQ with many inputs that can measure within +-10 V, and I want to go up to +-30 V. Using a resistor voltage divider could be an option, but this lowers the input impedance. I would prefer ...
0
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0answers
39 views

how to connect micro to µPD6379A (NEC Dac IC)

We want to use µPD6379A in our project. after a lot of search we've found no data (code example or schematic hint) about using it on internet. Can anyone guide us on using that IC. Any advice would be ...
0
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1answer
29 views

Can I use op-amp together with PCM5102A?

Is it possible to use op-amp with PCM5102A? In my application the load is much lower than 10k, so as a result I have much lower Vrms than it's defined in the data-sheet (2.1V). Maybe it's possible to ...
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0answers
33 views

FPGA VCU108 FMC Clock

For a project at work, we are attempting to create sinusoidal signals ranging up to 2 GHz using DDS implemented on an FPGA and DAC. Our current hardware consists of a VCU108 FPGA board from Xilinx ...
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0answers
36 views

External DACs to 3.5mm jack attached to computer speakers

I have 5 external DACs and 5 Speakers that are being powered independently. The DACs are connected to an Nucleo-f446re microcontroller where will be receiving their data from. For the speakers I am ...
1
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1answer
113 views

PCM5102A: analog output level not what I expected?

I cannot achieve a 2.1 Vrms mentioned in their datasheet (pages 4 and 9). I can only output 1.04Vrms from the 1kHz source. Do I measure it wrong or this is what I should expect? Or maybe I get such ...
1
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1answer
35 views

PCM5102A in 1.8V mode. Separate 0.1 and 10uF caps for DVDD an LDOO?

I found in the datasheet (33 page, 11.5.1) that when using PCM5102A in 1.8V mode, DVDD and LDOO should be both connected to external 1.8V. What's not clear to me is if I still have to put separate 0.1 ...
0
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2answers
53 views

Converting 2.1V RMS DAC output to instrument level 6.35mm jack

I'm not quite sure how level and impedance matching works so I am hoping for an illuminating answer! I'm generating audio with a PCM5102A DAC. The datasheet of the chip specifies a 2.1V RMS output ...
0
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1answer
76 views

Digital to Analog (DAC) design with MOS transistors

I am looking for a DAC design wıth NMOS and PMOS transistors as a part of a project, most of the DAC circuits that I found were builted with R-2R or with capacitors. But I need a design with MOS ...
0
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2answers
27 views

Load vs LDAC pins

Alright, so I'm using a TLV5628 Octal 8 bit DAC with my stm32f4-Nucleo and I'm kind of confused about the difference between LDAC and Load. I am also trying to figure out the clock rate and I might ...
0
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1answer
74 views

AD7849 is it burned?

I made a terrible mistake connecting -15VDC to the pin 18 of AD7849 instead of pin 17 and powered it up for a minute until i understood the problem.It was without the protection diode for power supply ...
0
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0answers
78 views

Connect DAC 12 bit (STM32F429) to audio line in of class D amplifier

Is it possible to connect the 12 bit DAC of STM32F429 directly to the audio in of XH-M189 amplifier module (for example)? What precautions must be taken into account? The connection of DAC to XH-M189 ...
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1answer
50 views

Is it possible to use one DAC to process signals from different channels that are delayed at different times?=

So I have a small project where I need to delay multiple signals that come out from a microcontroller. The signals are around 40kHz, have the same attributes, except that they are delayed by a few ...
0
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1answer
38 views

PCM270xC USB audio DAC, power modes and THD

I am designing a USB DAC for headphone use, and planing to use a TI PCM270xC IC. There are two power modes: (USB) bus powered, and self powered. What I'm trying to understand is how does the power ...
0
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0answers
146 views

I2S DAC Volume Control

First of all, let me preface this with the fact that I'm not an EE -- I'm a hobbyist with some experience and a background in software development. I'm trying to use a TI PCM5102A Audio DAC with a ...
0
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2answers
97 views

Hardware audio mixing [closed]

I'm having a hard time trying to understand some basic sound engineering concepts. From https://en.wikipedia.org/wiki/Original_Chip_Set#Paula: Paula has four DMA-driven 8-bit PCM sample sound ...
0
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1answer
70 views

Evaluation A/D and D/A converter

If I need to read and write data over TRRS to and from headphone (i.e. I read from standard (iphone/galaxy) headphone mic. and write to standard headphone earphones). This is a schema of what I want ...
0
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1answer
62 views

Arduino and DAC

I have programmed an Arduino to control a DAC, generated signal control the current of an LED via a LT1206. Whenever I plug in the power, before Arduino starts, the LED starts to blink because it ...
2
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1answer
152 views

SAMD21 DAC example

beginner here in need for starting directions. I have SAMD21 Xplained Pro Board. I would like to produce DC DAC output, based on 8 bits on the input. Range of my DC output values should be around ...
1
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1answer
146 views

What's the purpose of using PNP transistors on I2S bus?

What could be the reason of using these 3 PNP transistors on I2S bus (LRCK, BCK and DATA pins)? The DAC used in this schematic is PCM5102. I know for sure that this DAC would work without these ...
0
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2answers
126 views

Amplify my 3.3V DAC signal to 220V

In one of my projects I need to generate different kind of 220V amplitude waveform signals in order to send commands to a heater using the pilot wire protocol. Here are the needed waveforms: Is there ...
0
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1answer
110 views

How do I remove the offset from the DAC output and change the range?

This DAC has an output range of 1-3 volts. Here's the datasheet: Datasheet I'm getting pulses with different amplitudes, frequencies, duty cycles and widths varying from 0.2 ms to 2 s from the DAC. ...
0
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1answer
92 views

How does this serial input DAC work?

This is the datasheet for 6379A: datasheet I looked at the timing charts, but I’m still having trouble figuring out how the IC treats the serial input. Apparently, SI is sampled at positive clock ...
0
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4answers
395 views

16 bit DAC microcontroller

I'm currently working on a audio project where I need to play a 16 bit depth signal with a speaker. Right now I'm using an atmega328 for prototyping, two 8 bit shift registers (controlled by the MCU) ...
0
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1answer
41 views

Why does DAC INL follow a pattern, with peaks repeating at certain specific intervals?

INL curves seem to have relation with "digital" effects from the codes,like a major carry transition. Could someone help me understand an electrical or rather an analog, explanation for this occurance....
0
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0answers
81 views

Using a single channel on a 2 channel DAC + Amplifier

I am planning to use an external DAC + amplifier combo to output mono sound from my microcontoller. The ouput from the amplifier would be connected to a single speaker ...
0
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1answer
84 views

Output impedance for microcontroller minimum 5kOhm

So I'm looking into the stm32f469 series of chips (datasheet here), and see if I can play good audio with one with the build in DAC. To my knowledge, the built-in ones on chips usually aren't that ...
1
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0answers
66 views

Converting an SPI configuration for msp430 to msp432 IAR Workbench

I have a spi configuration code for a msp430 and DAC161S997 but i am trying to use the DAC with my ...
1
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0answers
91 views

Controlling DAC161S997 via SPI

I am using msp-exp432p4111 devalopment board and trying to use DAC161S997 with it.The main goal is creating a ...