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PGA460-Q1: measuring short distances.

December 2, 2019, 5:44 am
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Part Number: PGA460-Q1

Hi Akeem,

We are testing the product and some customers have reported that the sensor is oscillating the distance value when the obstacle is near. As we use the closed type sensor, I know that detection for distances less than 30cm is complicated, would there be any way to solve this distance value variation when the obstacle is near (<30cm)? Doing some tests here on the bench, I identified the following situation:

1 - Obstacle is physically at 70cm:

 

2 - Obstacle is physically 30cm:

 

3 - Obstacle is physically at 20cm:

 

Note that in this case the distance begins to vary (is reporting >80cm).

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MSP-FET: Can't program MCU RF430F5155 with MSP430 dll

December 2, 2019, 5:44 am
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Part Number: MSP-FET

Hello,

I'm trying to program the MCU RF430F5155 by using the MSP FET controlled by my own SW by using the MSP430.dll.

I dowload the package MSP430_DLL_Developer_Package_Rev_3_14_0_000.

The example file has been modifiied in order to download my application (29 kB), TI_TXT format:

- do I have to modify the start address (in the example is data0_addr = 0xf000) to a different vaule?

- the output file TEST.TXT is 13 kB in size and is very different from the file I want to download.

In the example I modifiy the data to download and the size (29 kB)

The example runs OK up to the end (NO error).

Attached you find:

- the file to download

- the file TEST.TXT

I don't understand this behaviour

May someone helps me?

Thank you very much!

Alessandro(Please visit the site to view this file)(Please visit the site to view this file)(Please visit the site to view this file)(Please visit the site to view this file)

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WEBENCH® Tools/HDC2010: EVM GUI tool for Win10

December 2, 2019, 5:46 am
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Part Number: HDC2010

Tool/software: WEBENCH® Design Tools

Hello,

I need the EVM GUI tool for Win10. I can't download the install file. I tried 3 times.... please share me a link. many thanks.

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DAC7811: Which minimum power cut duration needed for correct power on reset of digital part ?

December 2, 2019, 5:54 am
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Part Number: DAC7811

Hi,

We use DAC7811 for sine wave signal generation at low frequency (about 2KHz). The DCA7811 is supplied with +3.3VDC power supply. The SPI bus is driven by an FPGA sending all approximated sine wave points with a CLK frequency of 10 MHz. When doing a power cut asynchronously from SPI frame sending, we want to be sure that this power cut is long enough to ensure a correct reset of DAC digital interface.

We have seen in datasheet there is a power on reset module but no information is given in this document about the minimum power cut duration for this module to operate correctly and how long we have to wait after power supply recovery before sending the first SPI frame.

Have you any recommandation for a minimum power cut duration  (@+3.3V) ?

Many thanks for your help

Best regards

Sylvain BALSSA

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TIDA-01501: signals BRW, PS_ON, VP_P and ACSNS

December 2, 2019, 6:04 am
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Part Number: TIDA-01501

Hi,

I'm unable to find the function of Signals BRW, PS_ON, VP_P and ACSNS from the user Manual. Would you please explain their function?

Thank you.

Regards,

Amr

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LMH0397: Input filter/protection circuit for long cable runs, source from HD-SDI security cameras.

December 2, 2019, 6:04 am
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Part Number: LMH0397

Hiya,

I'm working on a signal quality monitor/redriver for HD-SDI using LMH0397 and after looking at various input circuits in DVRs and similar devices, they all feature some kind of fuse, ESD diode and some other passive components at the input stage.

The input signal is really bad/noisy (cable runs of 150-200 meters not uncommon) and it almost feels like there's some AC coupled on them sometimes - there's definite feeling of electricity when touching these. 

Is there a recommended / good practice design to be used here?

Datasheet doesn't mention anything beyond the standard circuit here.

Also related - would an isolated supply help here, or somehow isolate BNC input part as well?

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Sine wave input clock buffer

December 2, 2019, 6:06 am
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Dear Sir,

I need a clock buffer which support 0.5V to 0.8Vpp sine wave input, CMOS or LVTTL output, Freq. > 100MHz & low power consumption.

Best Regards

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CCS/AWR1843: CCS: TI_PRODUCTS_DIR

December 2, 2019, 6:07 am
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Part Number: AWR1843

Tool/software: Code Composer Studio

The customer doesn't have an opportunity to install CCS in C:\TI. He needs to change TI_PRODUCTS_DIR. Overriding a variable locally in a project doesn't help - new value of the variable does not apply. Do you have any solution for this? This post didn't help: https://e2e.ti.com/support/tools/ccs/f/81/t/480411 Thank you.

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TDC1000-C2000EVM: Connectig to another IC via SPI

December 2, 2019, 5:53 am
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Part Number: TDC1000-C2000EVM

Good afternoon,

I would like to find out if it would be possible to program the C2000 MCU on the TDC-1000-C2000EVm in such a way that i can allow it to communicate with another IC. If yes, how will be able to realise this, without tempering with the firmware for the GUI?

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DS90C189-Q1: LCD is not working ,Do need software request or other reasons?

December 2, 2019, 5:59 am
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Part Number: DS90C189-Q1

Hi,

I want to drive LVDS LCD display ,but my microcontroller support RGB. Because of this I use DS90C189-Q1. Now I design circuit(TI reference desing DS90C189-Q1) 

with jumpers, as pin to pin.But LCD is not working. I did not understand. But I did not use power sequence senario. 

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PCM9211: Recommendation for Coax amplifier

December 2, 2019, 6:10 am
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Part Number: PCM9211

Hello,

do you have a recommendation for a coax amplifier at MPO0/MPO1?

Thank you very much,

Simon

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CC1310: Calculate sniff mode parameters WakeOnRadio

December 2, 2019, 6:11 am
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Part Number: CC1310

I'm working with my CC1310 with the implementation of rfWakeOnRadioTX and rfWakeOnRadioRX. By studying the examples and reading some threads on this forum, I know that you can change the listening time of the package. By default it is set this mode:

#define WOR_WAKEUPS_PER_SECOND  2

#define WOR_PREAMBLE_TIME_RAT_TICKS(x) \
    ((uint32_t)(4000000*(1.0f/(x))))

  #define US_TO_RAT_TICKS 4
    #define CORR_PERIOD_SYM_MARGIN 16
    #define RX_END_TIME_SYM_MARGIN 8
    #define CS_END_TIME_MIN_TIME_SYM 30
#if ((WOR_RF_PHY_DATARATE == WOR_RF_PHY_DATARATE_50KBPS)  || \
     (WOR_RF_PHY_DATARATE == WOR_RF_PHY_DATARATE_100KBPS) || \
     (WOR_RF_PHY_DATARATE == WOR_RF_PHY_DATARATE_200KBPS))
    #define CS_END_TIME_MIN_TIME_STATIC_US 150

Then, The device wakes up 2 times every 500ms. 

Can I change this time in this mode? 

#define WOR_WAKEUPS_PER_SECOND  2

#define WOR_PREAMBLE_TIME_RAT_TICKS(x) \
    ((uint32_t)(2000000*(1.0f/(x))))

  #define US_TO_RAT_TICKS 4
    #define CORR_PERIOD_SYM_MARGIN 16
    #define RX_END_TIME_SYM_MARGIN 8
    #define CS_END_TIME_MIN_TIME_SYM 30
#if ((WOR_RF_PHY_DATARATE == WOR_RF_PHY_DATARATE_50KBPS)  || \
     (WOR_RF_PHY_DATARATE == WOR_RF_PHY_DATARATE_100KBPS) || \
     (WOR_RF_PHY_DATARATE == WOR_RF_PHY_DATARATE_200KBPS))
    #define CS_END_TIME_MIN_TIME_STATIC_US 150

The device, in this way, wakes up 2 times every 250ms. Should we change anything else or just that value?


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TLV8812: Question about VSSOP pitch

December 2, 2019, 6:18 am
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Part Number: TLV8812

Hi Team,

I have a customer looking at the TLV8812 as a replacement for the ST TSU102. However, even though the packages of both are stated to be VSSOP, the pitch of the two parts is different. The TLV8812 has a pitch of 0.65mm and the TSU102 is 0.5mm. Do you know the reason for this discrepancy? Do we have any similar Opamps which are completely pin compatible with a 0.5mm pitch?

Regards

Mihir

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CC2640R2F: Interface pin for debuging

December 2, 2019, 6:23 am
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Part Number: CC2640R2F

Hi TI support team,

What is the interface pin need to use for flash program (debuging) ?

I use TMSC, TCKC, TDO, TDI, RESET, VDD and GND (7-pins), Is it enough for using ?

Thank you

Best Regards,

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CC1310: Sensitivity issue

December 2, 2019, 6:23 am
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Part Number: CC1310

Hello.

We are currently debugging range issues on our  CC1310 radio design.The design uses the IPC Balun.

We have done all the recommended measurements found in the application report SWRA603.

  • When testing conducted power we are seeing 13 dBm output power using a spectrum analyzer. We compared this with a launchpad reference design.
  • When testing conducted sensitivity we are also within specifications according to the datasheet.

These tests indicated that everything is OK, however we have noticed degraded performance in real life applications.

At about -80 dBm we are seeing PER of about 30-40%.

When comparing antennas we noticed that a higher gain (5 dBi) antenna performed worse in terms of PER but had better RSSI compared to a -2.3 dBi gain narrow-band antenna.
What could cause this behavior? Could anything be done to improve the performance?

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DRV8703D-Q1: DRV8703D-Q1

December 2, 2019, 6:29 am
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Part Number: DRV8703D-Q1

Hello Experts,

You have these drivers: DRV8701, 02 and 03 but the difference between them is very unclear. Unfortunately your compare function helps very little since you have selected parameters that are all the same in the compare. 

Can you clarify the differences between the three products for us? 

Second question: 

Which do you recommend in relation to maturity?

Thanks!

Best, Christian

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TPS25982: Capacitor inrush current

December 2, 2019, 6:29 am
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Part Number: TPS25982

Hello Team,

with a target slew rate of 0.2V/ms I calculate a capacitance of 23nF (used 22nF, C0402C223K5RACTU) but measured 110V/ms.

Even with 4.7nF I got 40V/ms which is far faster than 1.4V/ms with 3.3nF (see below):

Can you explain this, please? Is this part useable for USB3 power? Something is wrong here, right?

Thanks and Best Regards,

Hans

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AM5728: SATA errata criticality

December 2, 2019, 6:31 am
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Part Number: AM5728

Our customer has not solved the issue discussed in the previous thread. The issue that SATA controller not detects an attached drive occurs on boards of about 250, but the rate of incidence on each board is very low. Our customer is concerned that some of the errata (i783, i807, i808, i809) for SATA may be left in the SATA driver, but wants to apply minimal modifications to the software because the board is in mass production.

What is the priority order that should be fixed in errata (i783, i807, i808, i809)?

What is the rate of incidence for each errata (i783, i807, i808, i809)?

Best regards,

Daisuke

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DRV8302: The BUCK of DRV8302 has Incorrect output voltage

December 2, 2019, 6:44 am
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Part Number: DRV8302

The above is the schematic diagram. According to the data sheet, the output voltage should be 5V, but the actual measurement is 8.8V. Why is this?

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UCC5390ECDWVEVM: UCC5390ECDWVEVM:

December 2, 2019, 6:52 am
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Part Number: UCC5390ECDWVEVM

Hi,

The ucc5390E EVM is powered by 14.5V input at Vcc1, i used jumper to connect  In+ to 14.5V and in- to GND. Still no response from the gate driver. The EVM is connected to a mosfet 

1. Do i need to operate it using PWM?

2. Is it possible to operate this gate driver as constant on/off swith for high side driver? i intend to drive a N-channel mosfet as a switch

Thank you in advance

Gal

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