Part Number: AMC1306M05
Dear all,
What is the Sample Frequency of the AMC1306M05 delta-sigma modulator? I'd like to properly design my anti-aliasing filter at the input of the device.
Thank you very much in advance for your response.
Best regards
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AMC1306M05: Modulator/Sample Frequency for Anti-Aliasing Filter
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DP83822I: DP83867 issue similarity
Part Number: DP83822I
Hi Patrick,
Were you able to figure out a solution for the problem.
I kind of have the same issue.
BR,
Bala
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TS5A21366: Should the GND of this part be connected to a digital ground or an analog ground and why?
Part Number: TS5A21366
I was looking at the datasheet of TS5A21366 and there is a mention of connecting the ground to a digital ground. Why can't it be connected to an analog ground? What is the reasoning behind connecting it to a digital ground.
Regards,
Sasank.
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AMC1035: Modulator/Sample Frequency for Anti-Aliasing Filter
Part Number: AMC1035
Dear all,
What is the Sample Frequency of the AMC1035 delta-sigma modulator? I'd like to properly design my anti-aliasing filter at the input of the device.
Thank you very much in advance for your response.
Best regards
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TRF7970A: TRF7970A
Part Number: TRF7970A
I am involved with a project using the TRF7970A for a NFC reader. I am working on the antenna design. I have some questions regarding the matching circuit design and more. I would like to communicate with an application engineer.
Thanks,
Avi Hartenstein
Beamtech Engineering
Mobile: 818- 203 4041
Email: ahcal@sbcglobal.net
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TPS7H2201-SP: 22A fast trip capability
Part Number: TPS7H2201-SP
Team,
I am trying to make sure that I understand the 22A fault protection. We show the 22A in a figure, but the times are not defined on the figure. I am planning on using this part for a power switch board.
In looking at the data sheet, it looks like the 22A fault protection during a fault, holds at 22A for 15 to 35uSec, turns off for 61 to 158 uSec and then tries to turn on again? I am I right? Also when the TPS7H2201-SP comes up again does it ramp up with the slew rate it is set at?
What I want to do is to keep the 22A fast trip capability and set up the switch with out the caps needed for the timers. I would like the switch to current limit and stay there, until the short is removed and then when the short is removed it goes back to normal load current. Is this possible? What do I need to do with pins 9 and 11? Do I ground them?
See pin 11 below, if I ground pin 11: I disable both the ILTIMER and the RTIMER? So, then the short circuit current would current limit and stay there, until the short disappeared? What do I do with pin 9? It appears, I ground pin 9. It talks about the need to then cycle the EN pin. Could this possibly interfere with initial turn on of the switch? Turn on due to the input powering up or the chip receiving an EN signal?
One other thought, I could just make the ILTIMER period long and if nothing happens have the switch turn off? How long can I make ILTIMER? If I did this and grounded pin 9 and ILTIMER timed out would the chip be disabled, and need an EN signal to bring it back online?
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TPS22810: Charging supercapacitor with constant current sink, comparator and load switch
Part Number: TPS22810
Hi,
I'm using TPS22810 and TLC393 with a constant current source as the main parts of a supercapacitor charge circuit. The goal is to charge with low current, discharge through TPS22810 when TLC393 trigger his ENABLE pin, and charge again while ENABLE is disabled because Vcap is below the target.
I have two problems: comparator seems to work well with very slow input (power supply controlled by hand...) or with some ramp waveform, but not always, and the other problem is Voltage drop on load switch (and overheat) when output current is higher than available (My supply is limited to 100mA, and I try to get 200mA with a load). The following snapshot was taken in this situation:
This is the schematic:
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LM27761: LDO Vout range limited to -5 to -1.5V, even though Vref is 1.22V
Part Number: LM27761
Hi,
According to eq.5 in p13, Vout should be able to hit -Vref (1.22V), but section 6.5 says it can only do -5 to -1.5V. How come?
VOUT = –1.22 V × (R1 + R2) / R2
I need to generate a low noise -1.3V/100mA from +3.3V to +5V, and other than the limit above, this device is ideal because of the output LDO. Suggestions?
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AM3358: why does UART_open return NULL?
Part Number: AM3358
Here is my code(BOARD_UART_INSTANCE=0)
Void taskFxn(UArg a0, UArg a1)
{
System_printf("enter taskFxn()\n");
UART_HwAttrs uart_cfg;
/* Get the default UART init configurations */
UART_socGetInitCfg(BOARD_UART_INSTANCE, &uart_cfg);
uart_cfg.edmaHandle = NULL;
uart_cfg.dmaMode = FALSE;
uart_cfg.loopback = FALSE;
/* Set the DMA enabled UART init configurations */
UART_socSetInitCfg(BOARD_UART_INSTANCE, &uart_cfg);
UART_Params uartParams;
UART_Params_init(&uartParams);
uartParams.parityType = UART_PAR_NONE;
UART_Handle uart = UART_open(BOARD_UART_INSTANCE, &uartParams);
if (uart == NULL)
{
UART_printf("\nUART_open() fail!\n");
}
System_printf("exit taskFxn()\n");
System_flush(); /* force SysMin output to console */
}
/*
* ======== main ========
*/
Intmain()
{
System_printf("enter main()\n");
Board_initCfg boardCfg = BOARD_INIT_PINMUX_CONFIG |
BOARD_INIT_MODULE_CLOCK |
BOARD_INIT_DDR |
BOARD_INIT_PLL |
BOARD_INIT_UART_STDIO;
Board_STATUS boardStatus = Board_init(boardCfg);
if (boardStatus != BOARD_SOK)
{
return (0);
}
Error_Block eb;
Error_init(&eb);
/* Initialize the task params */
Task_Params taskParams;
Task_Params_init(&taskParams);
/* Set the task priority higher than the default priority (1) */
taskParams.priority = 2;
taskParams.stackSize = 4*1024;
Task_Handle task = Task_create(taskFxn, &taskParams, &eb);
if (task == NULL)
{
System_printf("Task_create() failed!\n");
BIOS_exit(0);
}
start_app(); /* does not return */
return(0);
}
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BQ24195: Overheating issue
Part Number: BQ24195
Hello!
We are using the BQ24195 chip within a powerbank application.
With loads below 1.7A the chip works correctly, but if the load is higher, I meet with a voltage drop after a few minutes of work. The temperature of the chip reaches 85 degrees.
What role does the size of the PCB board play in overheating? Also, we have vias and thermal pad in our design, but we still face the problem of overheating. We've made a space with an open ground area on the top and bottom layers of the PCB to dissipate heat, which has slightly improved the situation.
I have an Evaluation Board on my hands, but I don't see this much heat under heavy loads.
I've attached the top layer of our application, maybe you'll have some tips on how to improve the situation.
Best Regards!
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IWR6843AOPEVM: Uniflash does not show 'iwr6843aop' as an option; not in the list
Part Number: IWR6843AOPEVM
Support,
I am using Uniflash v5. Connected to IWR6843AOP EVM.
1. EVM is not auto recognized although the USB drivers show up correctly in device manager
2. If I try manual, the IWR6843AOP is not shown in the list. I have tried to 'sync' the list - still same issue.
Regards,
Marc
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DM388: Controlling Standby Mode/Deep Sleep Mode
Part Number: DM388
Hello there.
I am currently working implementation of the DM388 DaVinci^TM Digital Media Processor using a TMDSCSCC dev board.
My currenttask is to set the board into Standby Mode and after reading the processor datasheet (Rev. D) Reading chapter 7.1 Power, Reset and Clock Management (PRCM) Module I was asked to read further the Technical Reference Manual (Rev. B) chapter 2. Which I did. Although the architecture is interesting I still haven't quite figured out how to enable/disable the Sleep mode.
I admit that my embedded systems knowledge is limited at this point and I am learning, but how exactly am I suppose to gain access to the sleep functionality.
Do I need to build a custom .c which calls the PRCM module and sends the information?
Is there a driver that I need to talk to specifically, if so where is the information about that?
The current setup uses the IPNC-RDK-CSK-3.9.1, using the arago project, linux kernel 4.4.12 (out of the box installation).
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AWR1642: Modifying MATLAB parameters
Part Number: AWR1642
I have been checking the Matlab code for the ‘lab0007_medium_range_radar’ demo from the ‘mmwave_automotive_toolbox_2_5_0’ but I can’t find a way to modify or set the Configuration Parameters for bandwidth, clustering, velocity resolution among all the parameters that can be configured.
In the case of the ‘lab0008_automated_parking’ demo I found a portion of the code that sends the desired configuration
Which calls the following function that adjust the required parameters
Can someone from your team help me to find or understand where can I modify the parameters? demos for the AWR1642 allow me to load a text file with the desired configuration, but this example is the one that I do require to run some testings, but don't understand how to modify the parameters.
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THS3491DDAEVM: Modifying the Evaluation board
Part Number: THS3491DDAEVM
Hello everyone,
I recently purchased the THS3491DDA EVM, I tried testing it with the Signal Generator and Oscilloscope, as described in the picture below.
For my project, My test input range is 1VPP to 5VPP at 10 MHZ max, and have a smooth, no noise signal with a 5VPP to 25 VPP on output respectively.
Suffice to say, I was not getting those results. I read the datasheet and it mentioned that the resistor network(Highlighted below) significantly decreases the gain.
Is there a way to surpass that resistor network and what would need to be done to get the results I'm seeking above? Thanks.
~Nate
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TMDSEVM6678: Signalling a task from NetworkDaemon
Part Number: TMDSEVM6678
Hi,
I am trying to do some signal processing on 6678l evm by streaming data from PC through UDP. I am using the helloworld example project from MCSDK. We are able to recieve the UDP packets. Is there a way to signals the other tasks once i recieve a complete UDP packet . Is it possible to do something like Semaphore_pend from a network daemon, or is there some other mechanism like signal trap .
Any pointers in this direction are welcome .
Thanks in advance
Aswin P Ajayan
PS i know how to normal tasks can communicate with each other.
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SN55LVCP22-SP: Floating metal
Part Number: SN55LVCP22-SP
Team,
Can you confirm if there is floating metal in 5962-1124201VFA/SN55LVCP22-SP?
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USB-TO-GPIO: Adapter not attached
Part Number: USB-TO-GPIO
I am having trouble connecting USB-TO-GPIO to PC. I see the green light on the adapter, however, the GUI says adapter not attached. Also, the device manager displays an 'unknown device'.
Please see attached screenshots. Could anyone provide a solution for this issue?
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CC2642R: How to disconnect a device from the simple_peripheral example
Part Number: CC2642R
Hello,
I'm trying to get the CC2652 chip into low power mode using TI RTOS. So I believe I need to shutoff bluetooth advertising and disable any active bluetooth connections.
I successfully turned off advertising using:
bStatus_t result1 = GapAdv_disable(advHandleLongRange); bStatus_t result2 = GapAdv_disable(advHandleLegacy);
However I can't see how to disconnect the client device from the simple_peripheral code. I tried:
hciStatus_t result3 = HCI_DisconnectCmd(selfEntity, HCI_DISCONNECT_REMOTE_DEV_POWER_OFF);
Any ideas? Result return codes are all SUCCESS.
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TRF7970A: NFC in Card Emulation Mode
Part Number: TRF7970A
Hello TI,
I am Planning to build NFC for Card Emulation Mode using TRF7970a and msp430f2370
the reference circuit given in the document sloa184 is it precise to follow up!
one more question total current consumption in active mode and sniffing current !
Regards
Ani
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TCA9554A: What is leakage from SDA/SCL to Vcc when device is unpowered & SDA/SCL is pulled up to 3.3V?
Part Number: TCA9554A
If the TCA9554A is not powered on VCC, but inputs (specifically SCL and SDA) are pulled up to a 3.3 volt standby supply via a pull-up resistor, what amount of current leakage will occur to VCC?
The datasheet indicated that if SCL or SDA is at a higher potential than VCC, the leakage current (IsubL) will increase above the +/- 1 mA level, but is it not clear what the leakage amount will be and if the path is to Vcc, to GND, or to both.
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