Questions tagged [texas-instruments]
A manufacturer of semiconductors, both discrete and integrated circuits.
323
questions
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17 views
high voltage isolated dc/dc converter watt selection problem
I am a beginner circuit developer.
I used a TI WEBENCH POWER DESIGNER, to make all-in-one battery management system power design.
POWER DESIGNER made a recommendation like the picture.
Specifically,
...
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53 views
What is LSF? Need your help! [closed]
I need your help to find a reference for a beginner. I have to learn (not deep) what LSF (Load Sharing Facility ) is.
Voltage Level Translation with the LSF Family, this tutorial was suggested me, but ...
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1answer
16 views
MSP430 Energia Basics ReadAnalogVoltage output 11 Volt
I'm a beginner starting with the MSP430F5529 Launchpad. I'm just running the Basics code 'ReadAnalogVoltage' that comes in Energia to test the voltage value. I literally have all the wires and ...
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46 views
Buck converter (TPS54331) oscillating
I have designed and built a buck converter based on the TPS54331 which oscillates at 5.4kHz with an amplitude of 700mV peak-to-peak under a 1A load. I want to remove these oscillations.
Here is a ...
3
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1answer
61 views
What is “voltage output swing from rail” in a TI op. amp. datasheet?
I'm reading this datasheet about the LM358P op. amp. I'm trying to understand what is the output foltage swing from rail. I suspect it is the amount of volts that ...
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44 views
Replacing mic22705 buck converter with cheaper one
Since Microchip decided to increase their mic22705 price, my company decided to replace it with another synchronous buck converter. the current price we get for 20K units of mic22705 is 1.459$.
The ...
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18 views
Simulating TPS54719 DC2DC in TI WEBENCH Power Designer
I'm interested in using TI TPS54719 to create 3 output voltages: 1.2V, 1.49V, 3.3V using three TPS54719 devices.
the same Vin voltage will be connected to the three devices and the Vin range is: Min = ...
0
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2answers
44 views
TPS541620 Buck converter IC - Feedback loop
I've been designing a POL supply using TI's new TPS541620. This seemed to be a good choice but it being new, it's quite hard to get more support than the datasheet can provide. And unfortunately some ...
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16 views
ADG1408+TLC5940 LED matrix leakage
I am controlling a multiplexed LED matrix with a combination of an ADG1408 as power switch and a TLC5940 as current sink.
The system works almost perfectly except for some LEDs that do not stay OFF ...
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2answers
50 views
DRV8860 - Open drain output with 1.4k internal pull-up - How to understand this low value
I'm going through the Datasheet of DRV8860 and got confused by the pull-up setting of DOUT.
In the Datasheet the block Diagram shows the pull-up as follows:
In the "Electrical characteristics&...
2
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1answer
45 views
TPS61046 wrong output voltage and high current consumption
I am designing a circuit to control a multiplexed led matrix and for that I am testing two boost circuits. The TPS61046 and the TPS61080.
My idea is that the input voltage is via USB or a Li+ coin ...
0
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1answer
43 views
Why this LVDS transceiver doesn't specify the differential input polarity?
I've been looking to implement a LVDS transceiver in my project where i can hook up to Displayport AUX differential pair.
I've discovered a suitable part, SN65MLVD200A in the following design ...
0
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2answers
89 views
LVTTL Buffer IC output logic when input is high and not connected to supply voltage
To buffer a LVTTL signal to FPGA I am using this TI buffer SN74ALVCH16827DGGR.The buffer IC is placed on a FMC based IO card mated to a ZYNQ mother card. The problem I am facing here is when an input ...
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2answers
34 views
LM567 (NE567) tone decoder lower input AC voltage bound and DC level
I've been trying to figure out the lower input bound for the LM567/NE567 tone decoder. Supposing the pin 7 is connected to ground, is the minimum input voltage 0V or can it go negative?
In the ...
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29 views
WL1837MOD SDIO Control(or Wifi module in general)
There are a number of wifi module which are controlled by SDIO(as an option). I am using the WL1837MOD as a specific example but I welcome more general answers.
All the documentation for this chip ...
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0answers
25 views
DRV8256PEVM: Vref does not change Itrip
I'm playing with the TI's DRV8256PEVM evaluation board based upon a DRV8256P driver.
The GUI connects to the board and I can enable the driver and change the IN1/2 PWM duty-cycle.
In the right pane I ...
0
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1answer
35 views
LTSpice error: Time step too small
I am trying to simulate the Buck Converter LM22676 from TI for a 5V output. But LTSpice shows an error saying that the time step is too small when I try to run a transient analysis. Can someone please ...
0
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1answer
29 views
TPS65233 LNB Circuit is drawing more current from supply
I have used LNB controller TPS65233 in my design. Input is 5.5V and Output: 13/18V. I am seeing access current drawn by the circuit when I give 5.5V input to the circuit and no load is connected to ...
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53 views
How to programming chip with TL866 even if not in the supported list of TL866 device?
I work at a textile company. We have a sensor header which is named USTER.
The Uster device checks the yarn quality. If it detects any problem it cuts the yarn.
In our company, we have 8x60=480 Uster ...
0
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0answers
27 views
xtr305 no output voltage
I'm using XTR305 for Analog output.
Below is the circuit for the same. After successful output from DAC which is input to XTR305, I'm not getting the output voltage. Can someone help me with that?
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2answers
36 views
Probing an externally powered circuit using MSP432 connected to the PC
I have an circuit powered by an external SMPS and I'd like to debug it using a TI MSP432 MCU. The MCU is connected to the PC and I'll use TExaS Display software (it basically works as a cheap low-...
1
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2answers
51 views
Stepper Motor Drive
I am using a stepper motor of the following rating:
Voltage : 3 -5V
Current 2.5A/ phase.
When two wires of the coil areconnected with a dc power supply at 5V and ground, the motor takes about 2.5A.
I ...
2
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2answers
103 views
Confused on the notation from a TI datasheet
So I'm trying to implement this IC onto a controller that I'm designing: https://www.ti.com/product/UCC5350 I understand for the most part how to apply it, I am just lost on one key part
The specific ...
0
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2answers
74 views
Asymmetrical output
I was searching for a current sense amplifier for measuring the current between a power supply and a battery i.e high side.
I found the INA240A1 (evaluation module here).
When I look at the ...
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28 views
Do we need to use two clock source for TM4C123GH6PM?
Do need two separate crystal if hibernation mode is used ?
I was referring the Tiva-C LaunchPad evaluation board schematic.
Following is the screenshot I have noted from this file:
From ti-datasheet, ...
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43 views
Timing issue about DSP Parallel I/O
I want to use DSP's parallel I/O to communicate with FPGA synchronously but find an issue with the timing. In this design, DSP writes data to FPGA through its parallel IO. The CLKOUT is generated from ...
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0answers
59 views
Need understanding of a LED/Lamp question
I have recently received a problem statement and need help understanding it.
Problem Statement
Proposed hardware must be able to support 10 White LEDs such that it provides a minimum of 450
“warm” ...
0
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2answers
70 views
SN65HVD232: Will it work if VCC = 5V?
Datasheet - SN65HVD232
Full part no - SN65HVD232D
My schematic -
Hi all, there is a problem in my PCB where 5V track is connected to VCC pin instead of 3.3V. Actual input should be 3.3V as per ...
1
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1answer
45 views
How does Power over Ethernet classification work?
In this TPS2372 PoE PD there is a table about how to set up classification of the device. I think I understand the concept of classifying PD devices, it's to tell the supply equipment the power demand ...
0
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1answer
72 views
RS485 isolated circuit - forgot connections. Will this work?
below is my schematic for isolated RS485 section. FYI B0305XT-1WR2 is used for power isolation and ISO1500DBQ as transceiver.
As you can see I forgot to place GND & GND_RS485 connections at pins 2 ...
0
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1answer
103 views
Power supply for micro(3.3) and LCD(5)
I am designing a board that has an LCD and msp430fr2433. They both need 5v and 3.3v respectively. So I decided to use TPS560430X3FDBVR and TLV70033DSET to provide 5v and 3.3v. I have attached the ...
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22 views
Using TIVA's onboard JTAG to connect to a 3rd party arm controller
I have a mikrochip's CEC1702 based board and a TIVA tm4c123 launchpad with onboard debugger. I wish go program the CEC board but datasheet suggests it can only be programmed via JTAG. Can I use the ...
1
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1answer
28 views
ADS4249 from Texas Instruments output clock
The ADS4249 supports both LVDS and LVCMOS outputs. It has an input clock (CLKP) and an output clock (CLKOUTP). The input clock can be a LVCMOS or LVDS signal. My question is does the output clock ...
2
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0answers
39 views
Use of a three wire load cell
I am currently doing a project which requires the measurement of forces on a surface and to achieve this we are using 3 wire load cells.
The problem that I am running into is no matter how I orient ...
6
votes
2answers
353 views
Mystery 1974 vintage TI chip: N286M26
I inherited three of these Texas Instruments vintage ICs, marked N286 (regular size) and M26 (unusually large). The smaller pairs of digits on the right hand side, 74 and 18, are, I assume, the ...
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47 views
Gateworks5910 + TI CC1352 Radio reboot SoC
I am a beginner in embedded systems programming, so forgive me if this is the wrong place to ask, but I could really use some direction.
I have a Gateworks 5910 running Ubuntu Linux, which has a TI ...
0
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1answer
29 views
Kinetis KE16 not coming out of reset without debugger 3V3 and GND connected
I have a project based on the MKE16F256VLH16 MCU. The processor won't run unless the 3V3 and GND are connected to the debugger (a LPC Link2 board), even if the LPC Link2 is unplugged from USB and left ...
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0answers
83 views
Help understanding the TI TPS22917 load switch
I'm playing around with a TPS22917 load switch on its own (not in a larger circuit), and there are two things that don't make sense to me:
When the ON pin is set to low, I see ~0.9 - 1.0v on VOUT. ...
3
votes
2answers
76 views
Decoupling capacitors for ADC
I have this ADS6125 adc. In the datasheet it is written that this ADC uses internal decoupling:
"capacitors on-chip eliminates the need for external decoupling" (p.45)
"As ADS612X ...
0
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2answers
44 views
Texas Instruments ADC - Input Clock
I have a question regarding the ADCs ADS58B19 inputclock, this ADC can be clocked with LVDS.
The data sheet says that Vpp = 700mV, which is +-350mV. The ADCs Vcm = 1.7V, is this the in and output Vcm?
...
1
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1answer
39 views
ADC - LVDS/LVCMOS Interface
I want to use the ADS58B18 from Texas Instruments. This ADC is differential and the outputs can set to either LVDS or LVCMOS with programming an internal register.
I have a question regarding the ...
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0answers
38 views
Programming CC3200 Microcontroller and Separate Flash Without a Development Board
I have an "Alfie" device which has wifi and USB, but I never
use this device, so would like to change its function.
It uses the CC3200 microcontroller (which has a little ROM)
and a separate ...
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32 views
Designing BMS for 4S LiIon Pack
currently I'm working on 4S(2P) BMS mainly focused on TI's ICs.
I'm stuck at the start - First, for now I want to use BQ2954 IC for charger, and BQ77915 IC for balancing and protection.
Now, I'm not ...
2
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2answers
82 views
What does a TL062 Op-Amp with output grounded and both inputs connected together with voltage divider mean?
So I'm studying Kilovoltmeters and subsequently using ADC's with resistor arrays and dividers from high voltage power supplies of all varieties.
I've got a good idea as to what they are and how they ...
0
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2answers
119 views
What is this transformer, is it package only without coil or complete transformer?
I did a simulation on TI Power Bench for a isolated power supply,
There I got transformer spec in BOM,
Core=Wurth Elektronik , CoilFormer=Wurth Elektronik
Core=150-2340 , CoilFormer=070-4477
Core Type ...
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0answers
63 views
How to calculate maximum switching frequency of TPS54160
The data sheet of the TPS54160 buck converter (https://www.ti.com/lit/ds/symlink/tps54160.pdf) includes a formula for calculating the maximum switching frequency due to the frequency shift protection.
...
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0answers
78 views
PCB header and microcontroller schematics for JTAG connection
I am using f28017f device from Texas Instruments and for my application I have to implement it on PCB. for debugging this device, I need JTAG connection. I will be using xds110 device for debugging. ...
0
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1answer
80 views
LM13700 control current appearing as voltage at output?
I've got an LM13700 in this VCA configuration, and for whatever reason the gain control input (I'm applying a triangle LFO, ranging from 2-7v) is appearing as a voltage at the output. Does anybody ...
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53 views
Problem using UART0 in TM4C123 Tiva C Launch Pad
I'm trying to interface UART0 with the my laptop using the ICDI
the code I used is from Mazidi's book :
...
0
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1answer
55 views
MSP430FR2433 SPI data corrupted
I'm currently working with MSP430FR2433 Micro. I want to interface this micro with the following modules:
LCD screen via SPI (https://www.orientdisplay.com/store/amc0802br-b-y6wfdy-spi-8x2-character-...
