Forum Post: RE: ADC0808-N: Power Sequence for VCC and VREF?
Tom, Okay, we have concluded that improper sequencing of VREF and VCC on the ADC was the cause of the error I was seeing. This topic can be marked as resolved. Thanks for the help! Regards, Jason
View ArticleForum Post: RE: ADS1299: AC Lead Off / Impedance Measurement
Hello Stephane, Measuring the BIAS electrode impedance (Z5) is also possible, but it's not straightforward with the available options in the ADS1299 . I've been in contact with your local TI FAE Dmitry...
View ArticleForum Post: RE: ADS1248: SPI communication in continously conversion mode for...
Hi Bob, thanks a lot for you help so far because it helped me out a lot. I am using a 4 wire RTD setup. As a reference Resistor i am using 820 Ohm with 1% accuracy. I resolved my data issue. The...
View ArticleForum Post: RE: DAC60508: DIV/GAIN-Setting of 1/1 "not recommended", but...
Hi Christoph, I believe we were a little terse when we stated that it was 'not recommended'. Really we should say that it is not recommended under certain power supply configurations. The internal...
View ArticleForum Post: ADS9110: PGIA for ADS9110
Part Number: ADS9110 Hi, we are looking for AFE with PGIA solution for ADS9110 and ADS9120 ADCs. General requirements are: - gains: 1, 2, 5, 10 or 1, 2, 4, 8 - single-ended and differential - optimized...
View ArticleForum Post: DAC161S997EVM: Firmware
Part Number: DAC161S997EVM Hello, Where can I find the firmware for DAC161S997EVM demo board? Gary
View ArticleForum Post: ADS1298: Lead resistance effect ; Noise ; CMRR
Part Number: ADS1298 Hi, We are designing custom ECG electrode with flexible printed wires as to reduce wires clutter from different electrode. The manufacturer has made the patch but the resistance...
View ArticleForum Post: RE: ADS4246: dowmloading a lot of data
Ajayt, There is no way to speed this up. The issue is due to the relatively slow SPI transactions from FPGA to FTDI USB interface device. Regards, Jim
View ArticleForum Post: RE: DAC161S997EVM: Firmware
Hi Gary, You can find the software on the EVM tool page. The download link is under the 'Order Now' heading. http://www.ti.com/tool/DAC161S997EVM Thanks, Garrett
View ArticleForum Post: RE: ADS1248: SPI communication in continously conversion mode for...
Hi FloW, The reference resistor is key for having stable results. The initial accuracy can be calibrated, but the drift cannot. Usually higher precision resistor will have a better temperature...
View ArticleForum Post: RE: ADS1247: ADC measuring only AC via capacitive coupling?
Hi Scott, Happy to help! Your first figure shows a CR high pass filter where the two 10k resistors are in parallel which is equal to 5k. The resistor with a ? value will equivalently be in series with...
View ArticleForum Post: RE: DAC37J82: Can't detect DAC condition from registers
Lance, This device has the capability to establish two separate JESD links if desired. There are some customers that would use the part in a redundancy application where if one link went down the other...
View ArticleForum Post: ADS1261: Data sheet reference to +/-7mV input span
Part Number: ADS1261 on the datasheet, it says it has a lower input range of +/- 7mV. I am kind of confused on how you got that lower input range and what it is actually referring too. Is it the actual...
View ArticleForum Post: RE: ADS122C04EVM: ADS122C04EVM With External Microcontroller
Hi Luke, Welcome to the E2E forum! I would suspect that either the RESET pin is not being held high, or AVDD is not properly connected to a voltage source. The ADS122C04 will be held in a reset state...
View ArticleForum Post: RE: DAC3482: initial configuration of the register
Hi, It will take me some time to review your script. In the mean time, you may review the following for your own debug: the app note will help you with your configuration of the DAC3484 -Kang
View ArticleForum Post: RE: ADS1256: Setting up the SPI Logic Analyzer for ADS1256
Here is my setup. I think one of the problem might be the fact that I have to do the following step: SPI.transfer(0x01); // Read Data 0000 0001 (01h) // ********** Step 3 **********...
View ArticleForum Post: RE: ADS122C04EVM: ADS122C04EVM With External Microcontroller
Bob, Thank you for the reply. I have confirmed that RESET is tied to 3V3 and AVDD is 3V3 on all nets surrounding the ADS122C04 . Is there any other configuration? Best,
View ArticleForum Post: RE: AMC7812: seeking support for I2C communication in AMC7812
Hi Santosh, You also need to enable the ADC reference buffer and ADC itself in the POWER-DOWN REGISTER (Address 0x6B). Bits 14 enables the ADC, bit 13 enables the reference buffer. Set those bits to...
View ArticleForum Post: RE: ADS122C04EVM: ADS122C04EVM With External Microcontroller
Hi Luke, There shouldn't be any other additional requirement. Send my some scope or logic analyzer shots of your communication for me to verify. Best regards, Bob B
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