Questions tagged [adc]
An ADC is an Analog to Digital Converter. This device converts analog signals into digital form. It is mainly used by digital circuitry to take analog measurements.
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Differential pair output of an ADC is routed in an opposite manner to an FMC connector
I have designed a 16 channel ADC card.
The part number of the ADC chip is ADC3444.
I have routed the digital outputs(differential signals) to an FMC connector on Board.
The mistake i have done is, in ...
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ESP32 ADC attenuation values
I am new to ESP32 and I need to use the ADC of ESP32 in one of my application.
I received the below image from this reference.
The document says that the ADC reference voltage is 1.1V to measure ...
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Can you sum demodulated signals with a single summing amp, or is it best to demodulate individually then sum together?
I'm working with Delta-Sigma modulation signals for audio ADC/DAC, and I'm curious if there is a best practice when it comes to summing their signals. Demodulation is generally achieved with a simple ...
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How to measure the voltages of a three-phase generator
I have a three-phase generator and I want to measure the voltages of each of the phases, but I don't have a neutral point. How would I connect the phases to an ADC, and how would I make a voltage ...
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Flexinol Resistance Measurement in PWM-driven Control Circuit
I'm using Flexinol (a Nitinol shape memory wire that contracts when current is passed through it) as an actuator for a project. I have a functioning circuit that uses a PWM-controlled MOSFET to ...
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MSP430 ADC with internal vref not working with USI and UART
I have an MSP430G2231 and I'm trying to get an ADC reading from port 1.5. I'm expecting a range of 2.0 to 3.3V, which I'm dividing to a range of 0.8 - 1.3V with a voltage divider. The divider is ...
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VREF for MAX31865 design
I am designing a circuit with the MAX31865 RTD IC, and I am reading the pin description of the DVDD and VDD pins. The datasheet states that these two pins should be connected to a 3.3V power supply.
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Converting resistance value to PWM using ADC
Glad to be part of the community. Currently I am working on a vehicle that no longer has the factory Powertrain Control Module, but I am wanting to keep the factory gauges.
All the gauges work except ...
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How to adjust this circuit to allow measuring of negative voltage beside positive voltage through microcontroller?
I am using the following circuit to measure DC voltage that is up to 18V, and I was wondering if there's a way to make it able to measure negative DC voltage down to -18V as well:
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Interfacing high-speed ADC with ZYNQ 7020
I need to interface a high-speed ADC (100 Msps or higher data rate) with a ZYNQ 7020 core board, which has limited number of pins available to use (100 pins). I need to sample a 30 MHz signal with my ...
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STM32L431VC reading single channel ADC from multi channel set up
I am using a STM32L4 MCU which has 1 ADC with 16 channels. I am using 3 channels to get data from different sensors. I want to get voltage levels from these sensors by selecting which input channel to ...
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Convert (0-10V and 0-20mA) to 3.3V using op-amp
Can i Convert (0-10V and 0-20mA) to 3.3V using op-amp and Without using TL431? if it is possible then how please explain?
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0-10V or 4-20mA conversion to 0-3.3V for Microcontroller ADC
I'm building an electronic project that will have hybrid analog input (can accept both 0-10V or 4-20mA).
The user can use jumpers to select the desired mode, which is either 0-10V or 4-20mA.
My ...
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Why are these typ. values greater than min. values in the datasheet of ADC128s102?
I'm reading the table of AC electrical characteristics (page 7) in the datasheet of ADC128s102 https://www.ti.com/lit/ds/symlink/adc128s102.pdf. However, I noticed that the minimum value of some ...
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Powering an ADC and a MCU from 12 V to 24 V
the concept is about an evaluation board that allows measuring up to 4 parallel load-cells from an ADC and process the output in an MCU:
Input voltage to the entire circuit: 12 V to 24 V with ...
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Chopping behavior of ADC output
A group parterner of mine is calibrating a board, and the ADC output is somewhat confusing
A closer-up view at one of the 1.5v platforms looks like this
So it seems as if the output has been ...
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Can the CANRX and CANTX pins be used as ADCs?
Can the CANRX and CANTX bus be used as ADCs on the Arduino Giga R1?
We have tried a few things with it but always returns either an error or a failure.
For instance, we called analogRead on the pins ...
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ADC/DAC system clock frequency for sampling rate
I'm doing some audio system with ADC/DAC used. Desired sampling rate is 48 kHz, but now I’m stuck with required system clock frequency for sample rate.
The ADC I use is PCM1804.
I want to use it in ...
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Using ADC DMA and TIMER in STM32H723ZG
I'm doing my first project on STM32. My board is STM32H723ZG. I am trying to sample analog signal using ADC. I set its sampling rate with TIMER6 and transfer data directly to DMA. I am actually ...
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How do you determine maximum frequency of AD574A 12-bit ADC?
The AD574 datasheet says the following:
How do you calculate that 1.5 Hz is the maximum frequency?
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hx711 high current consumption
I have one hx711 module connected a 200 kg load cell and I'm measuring a high current consumption: around 13mA where the datasheet says it should be around 1mA.
Cabling is as follows: usb to the mcu (...
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Completed Daisy Seed Guitar Pedal
This thread is a follow up to this one, and hopefully the last one in my series of questions.
The context is: I'd like to make a guitar pedal based on an Electrosmith Daisy Seed.
Requirements are to ...
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Differences between audio ADCs and general-purpose ADCs
From my limited understanding, audio ADCs, and even decoders, also have 16-24 bit resolution and not-so-low sample rates in comparison to high-resolution, low-noise ADCs.
It's also worth noting that ...
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Inverting Amplifier for Impedance and Scaling before Electrosmith Daisy Seed
This thread is a follow-up to this one and that one where I asked for solutions to feed a signal from a guitar pedal device rated 10 dBV (9V p2p) and 10 kOhm output impedance, into an Electrosmith ...
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Resistor and Capacitor before Op-amp Follower Circuit
I am still working on a personal project to use an Electrosmith Daisy Seed as a guitar pedal. While doing some research, I came up with my own textbook inverting amplifier setup to take the 10kOhm ...
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How to Calculate Thermistor Resistance?
I'm working on an embedded system project using an STM32 microcontroller, and I need help calculating the resistance of an NTC thermistor from a specific circuit design. My background is in software ...
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RP2040 ADC calibration (schematic)
I was working with Raspberry Pi Pico ADC pins, and found out there are minor errors in the Pico ADC (12bit) values:
When the ADC pin is connected to ADV_VREF, the ...
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How to calculate non systematic ADC error in perfect scenario
I'm using the ADC "ADC121C021" (datasheet) in my design. My question is rather theoretical.
Given a perfect (noise free) reference voltage and input voltage, is it possible to calculate the ...
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Differential vs. Single-Ended amplification for sensor sampling
I'm designing a load cell amplifier that should be low-cost, and functional in a noisy environment. The load cell is a 1k balanced full-bridge on a single package. The read speed requirement is only ...
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Is an ADC DNL > 1 also effectively a missing code?
I'm currently studying for an exam and have a question regarding the ADC DNL.
In the lecture, we've learned that a DNL=-1 implies a missing code.
I understand that ...
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ADC Design Help [closed]
I am planning to design a new ADC but I have not designed an ADC before. I will read at 10uV level. I am thinking of using a high resolution ADC, and also MCU
I am open to suggestions on this subject.
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What does it mean the MCU has 1 ADC and 10 ADC channels?
I got this AVR Microchip MCU ATtiny 204 chip. Now what I can't get, what do they mean in the datasheet it has 1 ADC and 10 channels ADC?
The datasheet:https://datasheet.octopart.com/ATTINY204-SSF-...
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Switching ON/OFF an ADC line
which electronic component could one use to switch ON/OFF several external lines for ADC?
Context:
I am working on a small project where I would like to measure 4 external voltages (0-3V range, let's ...
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How to use ADC to measure chained battery?
I have developed an ADC board using AD7192 to measure battery voltage. Assume each battery is 3V, the chained battery in series would gives 15V in total. Let the battery be BAT1+, BAT1-, BAT2+, BAT2- ....
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ADC DNL INL Confusion
The DNL of an ADC is defined as the measured code width versus the ideal LSB code width.
The INL is the integral of the DNL (or the running sum of it).
But the INL has two methods - end point and best ...
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STM32G4x 2 chanel Contunious Conversion Mode ADC DMA voltage read problem
I am using STM32G431KB Nucleo for measure a potentiometer voltage via ADC1_IN1 and ADC1_IN2 channels with Scan Mode DMA. And my samples arrays are always zero, no change. I share my code below. What ...
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Not correct reading in ADCs DACs integrated system
I made a ADCs board (AD7194) and DACs board (AD5689). Each DAC (separated ground) could output 0-5V, and Each ADC channel could measure 0-3.3V. I used a voltage divider network to turn 0-5V to 0-3.3V. ...
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Part name of this IC - "LLA#537"
I want to know the part numbers of the components marked as shown in the attached image.
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Part name of this IC - Analog Devices, 8-pin, "S 6B" A 06" "C 42"
I want to know the part numbers of the components marked as shown in the attached image.
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Simplest JFET front end to A/D converter
This is regarding a cheap Pmod I2S2 ADC and DAC (connected to an STM32F407G-DISC1) that uses a Cirrus CS5343 ADC.
Now, as best as I can tell from the CS5343 data sheet, the \$ V_{PP} \$ of the input ...
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How do I create a circuit to reliably calculate a range of unknown resistances?
I'm designing a low power circuit which serves to determine the unknown resistance across a 16 channel sensor. So far the results are bit subpar. The resistances are a function of a different applied ...
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Is this extra cycle before the MSB a common thing with serial bit timing?
The products that this is specifically around are the Pmod I2S2 which uses the Cirrus CS5343 ADC and CS4344 DAC. It is plugged into a STM32F407G-DISC1.
Now I am having some trouble figuring out ...
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How to understand and compare ADC errors between LTC2314-14 and internal ADC of STM32F103
We are going to sample and curve a short, fast-changing signal of around 34 us, with a reasonable resolution of at least 10 bits.
A 4 Msps ADC would provide us around ~138 data points in 34 us
The ...
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Wiring of INA128 instrumentation amplifier to Wheatstone bridge
Is there any issue with the wiring or calculations of my INA128 instrumentation amplifier to my load cell Wheatstone bridge? Currently I see no change in the output when connected to the oscilloscope. ...
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Noise Figure at the Rx ADC output
I need to measure gain & nf of the Rx at the ADC output. I inject sine wave tone to the Rx input. Then I make a ram dump of the IF ADC output, read it, perform fft and finally get the IF PSD.
My ...
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Sample and Hold IC specification
I am currently designing my 3rd year project in EE. I have an MCU with an ADC that samples at 15 kHz. The signal I want to sample has a 0.5 µs rise time which is equivalent to a bandwidth of 700 kHz, ...
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How to pass a pointer to multiple functions [closed]
I'm currently in the process of making my code work for STM32s through a code sample I found online: https://www.exploreembedded.com/wiki/Interfacing_Gas_Sensor_(MQ2)_With_AVR involving an MQ2 gas ...
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Impedance for a guitar pedal into an Electrosmith Daisy Seed ADC
I'd like to be sure I can feed my guitar pedal signal into my Daisy Seed ADC to then work on it with digital signal processing algorithms.
Here is what I know about my problem:
It seems guitar pedals ...
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STM32G4x ADC DR always zero
I am using a STM32G413KB Nucleo Board, I am trying to test ADC with the code I write I give below,
When I debug the code interrupt is triggering contuniously but ADC value don't change even I change ...
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Sigma-Delta ADC Sample/Conversion Rate to be clarified
Basically a, let say 1MSPS, SAR ADC takes 1 million samples a second, and then we do some math with those samples (averaging, sorting/taking median, digital filtering, etc...) to obtain a good ...
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