Questions tagged [texas-instruments]

A manufacturer of semiconductors, both discrete and integrated circuits.

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22 views

How can I setup a shared library between a bootloader and an application?

I am in the process of implementing over-the-air updates on a CC2652 microcontroller using the OpenThread stack. As far as I know a bootloader has to be able to operate independently from the ...
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26 views

Input leakage current affect on CMOS multiplexer ( TMUX1208 )

I am working on a board that operates with the current range up to pico ampere, I am looking to include a mux to provide multiplexing (8:1 multiplexer) between the sensor and the MCU within this ...
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1answer
38 views

DP83848C: DP83848 stops working after few month on field

In a product we designed, the LAN drive circuit(MII mode) is composed of LPC1768 and DP83848CVV. The function is very normal. There are no problems with factory testing. After using it in the hands of ...
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26 views

How to check if the photo-detector is working or damaged

I am using OPT101J photo-detector, in which I have developed a circuit which amplifies the O/P of these detector. I just want to know that what voltage will these photo-detector give if the detector ...
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1answer
52 views

DAC Signal Clipped By DC Voltage Source

I'm using a TI F28379D to generate a sinusoidal waveform from a DAC channel. The output of the DAC is shown in Figure 1 with a Vpp of 688mV. This signal is then connected to a resistive network of 1k ...
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1answer
86 views

EEPROM returns 0 while trying to read anything

I'm using a CC2652r to try to read and write to an MX25R8035F EEPROM using SPI. I'm using the build in SPI driver to try and communicate with the EEPROM but while the drivers says it succeeded the ...
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2answers
50 views

MSP430 multiple slaves in SPI communication

I want to make an MSP430G2553 communicate using SPI with a 7-segment display and with another microcontroller MSP430G2452. So the MSP430G2553 would be the master and both the 7-segment display and ...
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37 views

Discrete vs Integrated Magnetics

I am working on a design based on the TI TM4C1294 micro-controller. This is the first project that I have needed to implement an Ethernet interface on. I have been reading the system design ...
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2answers
34 views

DRV8873 PWM input

I'm working on DRV8873 to drive a brushed DC motor. The problem is the pin I should connect the PWM from microcontroller. DRV8873 datasheet There is two digital inputs that control the outputs but ...
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40 views

ADC of TM4C123GH6PM( 1 Msps as given in datasheet ) is not reading any data if sampling frequency is increased beyond 250Khz

I need to sense a signal at 500kHz. According to the datasheet of the TM4C123GH6PM it is able to sample up to 1000Khz. The code is already written with sampling frequency at 90Khz. Whenever I ...
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42 views

Boost converter voltage drop

I used both the TPS610986 and TPS61291 boost converter in order to power a load that consumes around 200mA in both situations (TPS610986 powering the load then use the TPS61291 to power the same load)....
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14 views

Problem in configuration of Tiva TM4C1294NCPDT on Code Composer Studio

I am using code composer studio and using the microcontroller below, I used Energia software to run a simple program and it runs, but when I use CCS and try to flash an example program for this MCU ...
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20 views

What is the quiescent current of the MCP73871 battery charger?

I was looking looking for a battery charging IC for a wireless device and found the Microchip MCP73871 and the TI BQ2423. Both of which do what I want, but I am not really sure about their quiescent ...
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2answers
76 views

Misra C or other code standard compliance in TI CCS

If I need to do Static Code analysis of my code or check for Misra C compliance for my code in TI's CCS for MCU RM57 then how can I do that? I can see 'Code Analysis' in the project preferences but I ...
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38 views

How do I connect noise reduction capacitors for “stacked” TI REF102 chips?

The datasheet for TI's REF102 shows a method for "stacking" multiple ICs to obtain voltages in multiples of 10V. Two stacked REF102 ICs gives you 20V, 3 gives you 30, etc. I've tried hard to copy the ...
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1answer
34 views

(ADS5295) 12bit ADC with 14x serialization

I am using 12bit ADC, Texas Instruments ADS5295. In manual of ADS5295, it says ADS5295 supports 14x and 16x serialization factor. The resolution of ADS5295 is 12bit. If I set 14x serialization ...
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19 views

Higher gain at higher frequency in instrumental amplifiers

I am using an instrumentation amplifiers (INA181). When the gain (G) is set to 10000 the behavior is as expected. However, when G is set to 1k there is an increase in the output signal going with the ...
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1answer
37 views

Cascading two instrumentation amplifiers to achieve higher gain

Is it possible to cascade two instrumentation amplifiers (for instance INA128)? let's say each has a gain (G) of 100 up to 100 kHz. Would this result in a G=10k up to the same frequency?
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18 views

Configuring TI TPA6138A2 for Single-Ended PWM Inputs

I'm looking to use the TPA6138A2 to ground-center, LPF, and amplify 2 PWM inputs (between 0 and 3.3 V). My desired LPF cut-off frequency is 18 kHz and I would like to use a digital potentiometer for ...
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1answer
186 views

Working Principle of Amplifier in INA290-Q1

I'm looking at TI's current sense amplifier specific to INA290-Q1. Their method for amplifying the differential voltage over the shunt resistor is shown in the image below: I am familiar with a ...
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26 views

Driving Headphones with ATmega324A

Background: I am considering the Texas Instruments TPA6138A2 as a combined headphone amplifier/low-pass filter solution to convert two 0-5V PWM signals from an ATmega324A (which can source/sink up to ...
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35 views

Design power bank with BQ24195

I want to design a power bank control board for a single-cell lipo battery. The IC I have selected is BQ24195 by Texas Instruments - datasheet here. I think it is perfect for what I need. It comes ...
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1answer
45 views

Two MCU Connected To Same Ethernet Port

Hello iam a bit stumped with this i have 2 mcu's both MSP432E on the same pcb.I only have one ethernet port but need both MCU's to be connected to the one ethernet port.Can i simply have 2 ethernet ...
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28 views

Difference in output between digital codec and analog filter

I'm working on a project which deals with filtering audio signals with a Low Pass Filter and amplifying the output. Currently, we are solving this using the TLV320AIC3111 audio codec by Texas ...
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59 views

How to import the CAD file, generated by TI Webench, into KiCad software?

I noticed that the TI Webench online designer tool generates a CAD file of the designed circuit, and I am a KiCad user (recently started using it). So, I am not sure if there is anyway to import the ...
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73 views

Trying to write to FRAM with MSP430

I am pretty new to embedded work, so I am just trying to pick things up on a small scale. So, for the reason, I have an accelerometer connected to my MSP430FR6989 Launchpad. At the minute, all I want ...
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53 views

bode plot of LM3481 as boost converter

I have simulated an open loop boost converter using LM3481 average model, given by texas instruments and I got a very strange bode plot (More precisely, strage phase response), please can you tell me ...
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1answer
39 views

AC Simulation in Power supply simulators

I would like to design a boost converter using LM3481 from texas instruments. To de the job, I have selected TINA TI circuit simulator, where the average model of LM3481 is given. So I have used this ...
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1answer
49 views

Ramp compensation for UC1843 and UCC38C44

When we pick up the datasheets of UC1843B-SP and UCC38C44, we notice that they have the same functional block diagram, specially the PWM generator circuit (Error amplifier, current sensing PIN and the ...
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2answers
91 views

TMS320F280049C: Unwanted pulse on GPIO during power on/off

I'm using the TI TMS320F280049C microcontroller. While testing its GPIO behavior during power on/off, I found a high to low transition on GPIO pin, on every power on/off. I'm checking the waveform ...
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1answer
53 views

switch-mode power supply

First post here. I'm making a DC/DC converter which will generate an output of 19.5V 18A. Its a synchronous buck converter with the LM5145 TI chip. When I have light load on the converter the output ...
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2answers
126 views

Mecrisp-Stellaris Forth on TI Tiva C LaunchPad

I'm currently trying to load mecrisp forth on a spare tiva c series launchpad (TM4C123) board I have at home and am not having much success. I'm an electrical engineering student and while I've ...
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38 views

Filtering analog audio signal using TLV320AIC3111-EVM

I'm working on a project to filter analog microphone data using the audio codec from TI, the TLV320AIC3111. We are using the EVM However, I'm facing problems with implementing the filters on the ...
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1answer
120 views

I2C setting MCU as both slave and master at the same time

Hello everyone I'm working on a new project with the TI MSP432P401R microcontroller. I want to have 2 separate I2C buses. I2C bus 1 will set the MCU as the master, whereas the DAC and the pressure ...
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112 views

Applying a 1/3 bias to an LCD display spec'd at 1/2 still safe?

We're currently using an MSP430 with an integrated LCD controller that only has a 1/3 bias mode. The LCD display has a 2-mux configuration and the data sheet specifies "drive method: 1/2 duty, 1/2 ...
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38 views

Configuring GPIO directions for I2S interface

I am working on integrating a WM8731 audio codec chip with an AM335X processor. This is my first time working with I2S and I want to make sure I understand it correctly for configuring GPIO directions....
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1answer
34 views

How to configure a clock rate of 50 Hz with a prescaler with TI Microcontrollers?

I need to configure a display that updates its values with f = 50 Hz. Since the CPU works with 16 MHz and the prescaler has a max. value of 256, the min. clock rate I can compute is 62.5 kHz. How do ...
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1answer
149 views

Compiler optimization prevents code from running

I was trying to upload a simple code to my board Tiva C EK-TM4C123GXL but it didn't work. I found out that when I turn the optimizer off, the code works fine. This is the code for blinking the on-...
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35 views

TMS320F28035: Simulink model for the SMO or eSMO block used for sensorless FOC of PMSM

I am a student of BITS Pilani, Hyderabad Campus. I am currently doing my summer internship at Analogics Tech India Limited - Hyderabad. I am working on a project to create a Simulink model for ...
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2answers
390 views

Configuring fuel gauge IC (BQ35100) with USB-I2C converter

I want to use TI's BQ35100 fuel gauge IC for my circuit. As per this instructional video, I would need an evaluation board and a communications interface adapter to configure the IC. Could I just use ...
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37 views

TPS55165Q1 does not work in boost mode

I need a power supply that delivers 12v with an input between 8v and 35v. That's the reason I bought a couple of TPS55165Q1 from Texas instruments. I've made 3 different PCBs with a similar circuit. ...
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1answer
66 views

Buck/Boost converter TPS63070RNMT is not working properly

I am working on a Buck/Boost converter design which is based on Buck/Boost converter TPS63070RNMT. Below is the schematic design. All the selected components are as per the Section 9 of the datasheet. ...
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31 views

Is there a Energy Harvesting Power Management and Battery Charging EVM dev kit (e.g. BQ25504) with easily adjustable voltage thresholds?

I have a BQ25504EVM-674 Energy Harvesting Power Management with Battery Charging (EHM) development board by Texas Instruments. It fulfills my requirement of charging an energy store (e.g. supercap/...
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247 views

Generate ePWM with F28379D

I'm trying to generate an EPWM signal with my Launchpad from Texas Instruments. I want it to be 50 Hz with a pulse of ~1 milliseconds in order to turn a servomotor (SG90) to -90°. This is the code I ...
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74 views

how to enlarge the reading range between the 13.56MHz NFC reader and tags with ISO15693?

I use TI devices, DLP7970ABP and RF430FRL152H tag. In order to enlarge the reading range, I buy a power amplifier and a large antenna(430mm*330mm). If I only disconnect the original antenna on the ...
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2answers
114 views

Buck Converter won't switch properly

I'm trying to use TI's LMR16006 Simple Switcher Buck Converter to regulate 48V down to 5V on my circuit. I used TI's WebBench tool to calculate component values for their reference design, and had a ...
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2answers
60 views

High level present in a pin of a non-powered IC can damage it?

I'm using a TXS0108E to convert from 5V to 3.3V and vice versa. The schematic is below: In the datasheet, in section 6, I read the following: Voltage applied to any output in the high-impedance or ...
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4answers
525 views

Audio Conversion With ADS1243

How can I use the TI ADS1243 8-channel ADC to convert a line-level audio signal (ideally balanced) to a digital 24-bit (as stated on data-sheet) stream.
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1answer
27 views

Selecting switching regulator components based on cost and performance

I'm designing a PCB which requires 3.3V and 9V power regulation. Eventually I plan on building a fair amount of these boards, so I want to plan my design so I'm able to buy components in bulk if ...
2
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1answer
197 views

Will a buck converter allow current to pass through if Vin is less than the configured output voltage?

In general, will a buck converter allow current to pass through if Vin is less than the configured output voltage? Specifically, I'm reading the TPS54308 datasheet and I'm not seeing an answer to my ...

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