A DAC is a Digital to Analog Converter.

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Audio interface using LPC2138

I am planning to implement Voice guide/Assistant using TLV320DAC3100 DAC and LPC2138 controller. Above DAC has I2S (Inter IC Sound) interface. Unfortunately,LPC2138 is not I2S supported. So, Is there ...
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3answers
43 views

4-20mA Loop powered DAC

I was selecting a DAC for HART network and in the process I came across two terminology. 12-/16-Bit, Serial Input, 4 mA to 20 mA, Current Source DAC AD5420 and 16-Bit, Serial Input,Loop-Powered, 4 ...
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1answer
139 views

DAC datasheet term confusion: FS-1LSB

In the Digital to analog converter HP16BME, I keep stumbling into " +FS - 1LSB " and I'm not sure what it means. I mean, I still don't know the exact scale value because I don't know what FS stands ...
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30 views

Intel Integrated Audio Signal Path [migrated]

I have a Dell Latitude C840 laptop. It has Intel Integrated Audio. Intel 82801 CA/CAM AC'97 Audio Controller. It has been giving me problems. Sometimes I get chopped or truncated audio, or strange ...
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1answer
39 views

Controller built-in vs external DAC

I am using STM33F in my application, it has 12 Bit DAC. For one of the audio codec module in same application, stereo DAC with inbuilt amp needs to be implemented (IC TLV320DAC3100). Above codec ...
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51 views

STM32f4discovery DAC DMA HAL library

I have a problem with the configuration of DAC with DMA. DAC is working but when i want to connect it with DMA it doesn't work. Here is my code: ...
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2answers
61 views

Which GND pin do I use on a DAQ?

I'm trying to use an absolute shaft encoder with an NI MyDAQ. I'm powering the encoder using the 5VDC pin on the DAQ. Does the ground pin--AGND vs. DGND--I connect the shaft encoder to matter? I ...
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0answers
73 views

SPI Communication fails with ISO7241C but works with ISO7641FC, same circuit?

Objective: To interface DAC161S997, with Microcontroller C8051F350 through ISO7641FC using SPI Protocol, Which works fine and DAC output is achievable. Now here is the problem, I have changed ...
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1answer
39 views

Choosing an Audio D/A converter for I2S digital audio based on 32fs

I'm hoping someone can either verify or clarify my understanding of interfacing an Audio D/A converter to a device that sends audio over I2S. I have an Audio Codec chip, the VS1063A (Datasheet), ...
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1answer
32 views

Current Source version of TLC5940 (current sink LED PWM driver)?

Is there a current-source equivalent of a TLC5940 (current-sink) PWM LED driver? I'm working with a large number of linear resonant actuators (LRAs), each of which only uses ~50mA, but must be driven ...
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2answers
84 views

Audio conversion to digital format

I am confused in my understanding in implementation of voice guide for one of the instrument. I am trying to implement voice guide while operating one instrument. Audio data will be saved in memory ( ...
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2answers
60 views

Problem with SPI communication when Silabs Si86xx digital isolator is used

I'm trying to establish communication between Atmel Atmega32U4 (used in Arduino Leonardo) on MCU PCB and TI DAC8552 on PSU PCB via isolated SPI link. For isolation I'm using Silicon Labs Si86xx ...
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1answer
52 views

PIC microcontroller DAC output incorrect

Using a PIC16F1825 microcontroller I was seeing incorrect values being output on the DACOUT pin. The setup stipulated using the fraction 8/32 * VREF+ where VREF+ was an external 2.5V reference. The ...
3
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1answer
51 views

How are DACs integrated in color LCD screens?

I'm having trouble imagining what actually happens inside an LCD screen. I picture digital RGB data for each pixel getting sent to the screen through a connector. Lets say we have 24-bit color for ...
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2answers
53 views

Converting Pulses to Analog Input for Mic

A continuation of this question. I am attempting to read two flow meters through the mic port of a phone/tablet. The flow meters' pulse pins toggle between +0V and +5V as their pinwheels rotate. I ...
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1answer
154 views

How to interface this circuit with a 0-10v Theatrical Lighting Dimmer

I'm trying to build a circuit which allows an Arduino to control 6 channels of lighting from an old Strand Act 6 Dimmer. These dimmers have 8-pin DIN connector on them like this specification. Pin 7 ...
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1answer
73 views

Clock distribution for low-jitter audio DAC

I am building a 10-channel audio DAC using 10 ES9018 converters and an ultra low phase noise clock (Pulsar) with femtosecond jitter. What would be the best way to distribute the clock's signal to the ...
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4answers
244 views

Counteracting Sound Card AC Coupling for Reading Digital Data

Disclaimer: I am new to EE. Everything I have learned so far I have taught myself from reading online and posting questions like this while working on this project. I apologize if I do a poor job of ...
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1answer
133 views

Why modern oscilloscopes use hardware triggering?

I've been learning how DSOs work for the past few days. As far as I understand, digital storage oscilloscopes have trigger circuitry, which usually consists of an analog comparator and a DAC. A ...
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5answers
343 views

16-bit or 24-bit converters?

I wanna build some DSP effects on, for example STM32F4 processor, with frequency 96 or 192 KHz. Are 16-bit converters (ADC and DAC) enough for that kind of operation? Can I hear a diffrence when ...
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1answer
49 views

How to properly ground chassis containing AC/DC switching power supply?

I'm planning to build a Digital Audio Converter as a hobby device and I had some questions regarding safely grounding the chassis. I want to purchase a power supply like this one: MicroMall(TM) ...
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2answers
46 views

Improve DAC Pulse Rise/Fall Time

I have an older NI DAQ (PCI-6251) which comes equip with a bunch of ADC's, two DAC's and a hand full of DIO ports. I need to output a pulse of variable width, amplitude and DC offset which the DAQ ...
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1answer
53 views

Why is USB D+ tied to VDD (for PCM2707 at least)

I'm trying to implement an audio DAC using PCM2707 as a receiver and, looking over a couple schematics of previous implementations - at least one being verified as correct, I noticed D+ being ...
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2answers
130 views

Can I adjust the volume of a DAC using PWM?

Here is a circuit that allegedly converts PWM into a precision voltage reference: I am thinking about feeding that reference into the reference line on this MCP4921 DAC. My goal is to generate ...
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1answer
61 views

How to deal with analog pin drivers with output switching?

I'm trying to figure out if there's any way to affordably improve the performance of an analog pin driver that needs to be periodically isolated from its load, for the duration of self-calibration. ...
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1answer
22 views

Texas Instruments Page/Register Convention - how to find the actual register address?

I am having troubles understanding TI datasheets regarding their DACs... I haven't felt so stupid for quite a while! To make things as transparent as possible, here is a very literal question. I am ...
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2answers
84 views

Using DAC to create reference in a wheatstone bridge for strain gauge?

I am designing a circuit where a microcontroller can measure the load forced upon a load cell with strain gauges, making a half bridge. A traditional Wheatstone bridge looks like this: Resistors ...
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0answers
29 views

Best Battery for saving small charge Overtime

Working on a project that requires the use of piezoelectric effect. It is true that the charge per compression can be very small. Trying to figure out what the ...
0
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1answer
45 views

Connect ground of system A to 1v6 of system B?

I have an embedded system powered by a 3.7V LiPo battery that will be connected to an iPod's headphone out cable. The embedded system will perform some DSP on the iPod's audio out signal and use ...
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5answers
90 views

Digital circuit for adding multiple frequencies

The goal is to implement a kind of a digital piano on an FPGA. Until now, I managed to produce individual notes using counters. Basically, I generate a square wave of a certain frequency, that ...
6
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2answers
527 views

Is there any DAC that generates a negative voltage or sine wave without offset?

I would like to generate a positive and negative voltage (sine wave without offset) from an AVR microcontroller. I think it needs an external DAC, because the internal ones are not able to generate a ...
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2answers
77 views

SPI communication not working during Run time?

For my project i need to communicate between Microcontroller C8051f350 Datasheet (Silab Microcontroller) and TI DAC116s997 DataSheet IC through SPI. The problem i am facing a problem in SPI ...
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1answer
104 views

Driving 555 control voltage with DAC

I have build a stepped tone generator (aka Atari Punk console) which are 2 555 timers connected together (one 555 is configured as a astable oscillator and drives the second configured as a monostable ...
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1answer
125 views

Looking for a way to output 100-144 Analog Channels from Arduino

I've been searching for days and found 2 ways that could work, but not sure about implementation: Using shift registers like in: ...
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3answers
92 views

Problem : Cmos Circuit

I got a problem related the circuit below. I wanted to make DAC (0-80V) using a pwm input (6 kHz). You might ask why I did not make it with a single n-mos. The reason for it, I used a single as ...
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0answers
47 views

DAC via I2C: detect error conditions

We are using a MAX517 DAC-device as slave and an ATmega8535 controller as master. Communication errors can be readily detected by comparing (TWSR & 0xF8) with 0x08 for Start, 0x18 for address ...
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2answers
75 views

is there any analog voltage reading ic present? [closed]

In arduino analogRead() reads voltage from 0 to 5 v and gives 10 bit output. Is there any IC which is specialized for this function only?
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223 views

Straight from the datasheet: Is this really a sensible filter circuit?

Cirrus Logic CS42426-CQZ is an audio CODEC that I want to use in a custom USB sound card. You can download the datasheet from there. On page 61, the datasheet has a recommended circuit for each A/D ...
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1answer
208 views

Replace an Analog Pot with a digital one?

I have a Boost converter with a constant current mode that allows me power a high power led (Vf 34, 3A). I'd like to be able to control the current potentiometer on this device with an arduino. To do ...
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1answer
41 views

Compute analog signals as functions of two signals

I would like to hear your opinion with respect to the following architecture for a supposedly easy task. I need to “compute” the value of two voltages depending on two signals. Details: I need to ...
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3answers
168 views

Joystick interface

I need some advice for my project. I would like to create a joystick interface for my old Amiga computer. I have an analog joy with HID USB interface, I can read the position datas in digital format. ...
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1answer
202 views

Need help with a R-2R DAC Circuit

I am trying to simulate a 4-bit DAC circuit using a R-2R resistor ladder. I am using a 741 op-amp. I selected the R value as 10k and calculated the value of Rf using the equation given on this page - ...
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0answers
61 views

Calculating resistor values in R 2R derived circuit?

I am designing an audio effect to try to create that digital lo-fi effect, by using 2 quad op amps in a flash ADC configuration and then doing a R 2R DAC on it. Since I do not want to use no ...
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1answer
91 views

How does an speaker amplifier have to be build for a given DAC output signal?

I am working on a project "cat projector" which shall "shout" at the cat when she jumps on the table in the living room. For the logic I use an Arduino board which plays/streams the sound at 22.1kHz ...
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3answers
514 views

Which Amplifier Should I Use After my DAC (what are I am doing wrong)?

I am working on a project "cat projector" which shall "shout" at the cat when she jumps on the table in the living room. For the logic I use an Arduino board which plays/streams the sound at 22.1kHz ...
1
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2answers
116 views

Converting mark space ratio to DC

I have a pulse which varies between 500 Hz to 100 kHz where the quantity I need is the mark space ratio, I'm not interested in the frequency here although it must affect the design. What I've come up ...
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2answers
138 views

Raspberry Pi and TLC5615 DAC

Currently I'm working in a project in which I need to programmatically control 2 currents from 0 to 1 Amp. My plan is to use two DACs controlled by a Raspberry Pi. My idea was to use the MCP4725 but ...
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93 views

Current steering DAC

I want to design current steering DAC with current mirror sources binary weighted and an op amp to convert the current from the current sources to voltage corresponding to the input current. I find ...
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48 views

Problem with DAC with current mirrors

I'm trying to design curent steering DAC with binary weighted inputs - I'm using M4, M5, M6, M7 to copy the reference current flowing in M8 with coefficients of 1,2,4,8. The idea is to put either 0 or ...
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2answers
387 views

ENOB Calculations

I've been having a discussion with a colleague about ENOB (effective number of bits) calculations for DACs and ADCs. We both come across it from different directions (he being more analog, and me ...