Part Number:DAC7760
Hi,
I would like to ask you about the accuracy conditions in the electrical characteristics of the data sheet.
Although REFIN is described as 5V-external, is it OK to understand that 5V of the REFOUT output
is connected to the REFIN pin as described in the application figure 96?
Or is it 5V input from an external regulated power supply?
Part Number:ADS131A04EVM
Hi Team,
I'm using ADS131A04EVM now, I have followed the steps on EVM user guide, but cannot connect successfully. The USB driver seems to be not correct, could you please send me the USB driver for windows 10 because the EVM user guide doesn't have the link for the driver?
Thanks and Best Regards!
Hao
Part Number:AFE5801
Hello!
I am using AFE5801 to sample a sin signal. The sample rate in 40MSPS, and the input signal is 1MHz. The input circuit is shown in picture and two R(25.5) are not connect. I config the register to work in 2s complement mode. Why does the signal I sample not swing around 0 but have an offset value. How can I solve the problem?
Waiting for your reply!
Thanks
Part Number:ADS1235
Hello Professional,
My customer have 2 questions for pin assignment of ADS1235 when use Single-ended-input.
Q.1
The datasheet chapter "8.1." said "The ADC supports three differential or five single-ended-input measurement configurations".
However this device has 6 input and we cannot find the description of assignment of 6 input pins to 5 single-ended-input.
Can we assign the any 6 pin to 5 single-ended-input? or is there any limitation for assignment?
Q.2
Could you provide INPMUX(11h) resister setting samples for Single-ended-input?
I think if we want to use this device to Single-ended-input, I need to set positive input to any AINx and negative input to Vcom. Is this under standing correct?
I'm looking for getting your reply.
Best regards,
Kuramochi
Part Number:AFE4490SPO2EVM
Hello,
if the ADC of the AFE4490 module is bypassed and the signals are routed out to the pins RX_OUT_P and RX_OUT_N we see a 4 MHz frequency in the output signals on the oscilloscope.
The pulse oximetry module runs on a 4 MHz clock so the source of the frequency is clear.
Is this 4 MHz swing only visible on the oscilloscope or is it also present if the ADC is not bypassed?
At first crosstalk from the CLOCK_OUT pin was assumed, so a RC-filter was attached. However, the 4 MHz remained in the output signal.
Is there anything we can do about the 4 MHz?
Regards,
Max
Part Number:ADS1261EVM
Problem
I have the ADS1261EVM and have connected it to two separate PCs with the provided USB cord and in both cases after starting the Delta Sigma Eval SW I get an error message at the bottom that says that the "Hardware is Not Connected.Ready...".
Background:
On both PCs, I have installed the following software and am running Windows 10 with Admin privileges
I've attached photos of the screen, the board, and a close up of the USB connector (J8) since it is suspiciously short, but I have pushed the USB cable all the way in (could that be the issue?)
Do you have any ideas?
Thanks
Part Number:LM98640QML-SP
Hello,
I am interested in knowing the package material of this device - the datasheet lists it is ceramic. We are interested in the specific material in order to determine the coefficient of thermal expansion.
Additionally, the lead finish material is listed as NiAu - what is the base material?
Thank you,
Fiorella
Part Number:DAC8830
Hi e2e community,
I'm attempting to control a DAC8330 with 5V TTL lines. The output of the DAC updates unreliably, unless I repeat the command in a burst of about ten sequences. I'm not having problems with other SPI devices on the board, so I'm wondering if anyone has any thoughts on what might be happening. The circuit is pretty simple with a 2.5 V reference and 5V digital in lines.
I think I am following the timing compliance. I do not have proper high frequency probes, so please ignore the coupling from having the leads attached:
The clock is in blue and the chip select is magenta. I thought perhaps something could be wrong with my clock cycles. What I'm inputting seems to be consistent but the output does update consistently.
Has anyone observed behavior like this in terms of output reliability?
Thanks,
Ian
Part Number:ADS114S06B
Hi, I'm using this ADC to convert two kind of signals, 0-60mVcc / 0-10Vcc, please see attached schematic.
I need to measure 0-60mV on AIN0 channel and 0-10Vcc on AIN2 channel.
Problem found: When I apply a signal higher then 2 or 3 Vcc on my input signal, reading AIN2 channel, I have wrong values.
When I open R7, I have the right values.
But I'm using 10K(R7) exactly to protect over current on AIN0 channel.
Can you help with this issue?
Thanks!
Part Number:ADS1278-SP
Good afternoon,
I am considering using this part in a new design that I am working on. Unfortunately, the TID for this device is 75krad, the target TID for this mission is 100krad. I've come back to this part because it has the highest total ionizing dose rate for this family of devices that I've found.
Is there any documentation available that can describe how this device was verified? Are there any plans to further qualify this device up to 100krad?
I am considering this part for a telemetry board, we have a lot of low frequency / DC telemetry points that we are interested in tracking to within a high degree of accuracy. Sigma Delta ADC fits this need very well. The target location for this mission is the Enceladus moon in the Saturnian system.
Dave
Part Number:TLC2543-EP
Hello.
I am using the TLC2543 to measure an output voltage provided by a temperature sensor (i.e. a relatively slowly changing signal). I provide an external clock with a frequency of 2.5MHz. I have configured the device for a 12-bit output data length, MSB first, and Unipolar. Also, I am holding Chip select low constantly (no de-assertion of CS between samples is occurring).
When looking at temperature plots, temperatures (as reported by ADC counts) appeared to avoid certain small bands in the overall range, opting to immediately round-up or round down to favored values above or below these bands. These bands appear to be roughly 4 to 8 ADC counts in size (2 to 3 bits), and appear at several point over the entire range*.
As an effort to find the source of this behavior, the temperature sensor was replaced with a precision voltage source, which allowed me to evaluate the ADC over any point along its entire input voltage range. The waveform generator had sufficient resolution to effectively allow me to "dial in" any desired output ADC count. Output ADC counts were observed using an oscilloscope connected to the "Data out" pin of the TLC2543 (and values were decoded visually).
As a test (removing the temperature sensors from the system), I subjected the ADC to the precision reference voltage, then slowly increased the voltage, looking for instances where the resulting ADC count would skip over 4 or more binary values. I found such region at 2.97 volts. At 2.972 volts, the ADC reported the binary value "100110000111". Upon increasing the voltage by a few mV, the next ADC value to appear was "100110001011" (which is 4 ADC counts from the previous value reported by the ADC). At points in between, the ADC would oscillate between these two values.
Dialing the voltage back down to 2.972V, the ADC resumed reporting "100110000111".
The takeaway here is that the ADC completely avoided the 4 binary values in between these two reported values. This behavior was observed over the course of 30 seconds, after which the measurement was ceased.
It appeared in this case that that the 2 LSBs were stuck high. However, upon increasing (or decreasing the input voltage to other values sufficiently far away from 2.972V, the 2 LSBs began transitioning as expected.
*These bands appear to spaced apart by 64 ADC counts.
What could be causing this?
Part Number:TX7332
Hello
My Customer use CW and Pulse.
When Pulse Mode
AVDD : 100V
When CW Mode
AVDD : 5V
Part Number:ADS7254
Hi Experts,
Our system is using ADS7254IRTER. Due to some reasons, we noticed there is a chance that DVDD pin is not powered by 3.3V while AVDD is powered by 5V and REFIO is powered by 2.5V. Under this condition,
1) Is there any chance for ADS7254 to operate and output any?
2) Is there any path to flow a current from AVDD land to DVDD land?
3) When continuing to use ADS7254 under this condition, what kind of event occur do you think? A permanent damage occurs?
Regards,
Uchikoshi
Part Number:AFE5816
Hi Team,
Several questions about DTGC funciton of AFE5816/5832 from my customer for it i cannot find answer in datasheet. Could you please help me with it? All below questions are about "External Non-Uniform Mode"
1. When is the gain updated based on new parameters after internal registers are configured with new data? (as soon as SPI writing? or the first TGC_SLOP rising edge? or others?)
2. Response time of DTGC? As "Electrical Characteristics" it is 10us (TGC response time), while based on figure 34, 35, the gain high-low step response is far below 0.5us, low-high step response is around 1us, and my customer reported their test result is far longer than 11us. Which one is correct?
3. How and when profile switching occurred? If the device is switched to profile 1 during it is working in profile 0, when will the device really switched to profile 1? After it has reached stop gian/start gain or the switching occurred at once? If profile switching occurred at once, how does it work? For example, if the device is working in profile 0 with start/stop gain is 6/20dB and current gain is 10dB. Now it is switched to profile 1 with 30/45dB of start/stop gain, what will happen? the device will step to 30/45dB? or it will continue up/down from 10dB to new start/stop gain?
4. Is it must to set start/stop gain difference to integer multiple of positive/negative step?
Thank you,
John
Part Number:DAC7760
Hi team,
My customer is using DAC7760 for digital to analog 0-10V output application. They have set the output range to 001 according to the datasheet table 9.
Ant the power supply is +12V and GND 0V.
But the output of DAC7760 is only half of the setting voltage. For example, they input all 1 digital, expecting 10V output., but actually only 5V output.
Could you please help to share some advice for this?
Thanks.
Part Number:DAC38RF83
Hi!
The recommended start-up sequence of the DAC38RF83 is described on the fig.167. Can you tell, please, how does the DAC behave in the period of time when the supplies are already provided, but the resetb pulse is not yet provided? Are the DAC registers initialized at power-up or filled with random values? Does the DAC try to operate in accordance with the randomly initialized regs during this period of time? Can the resetb pulse be delayed to an undefined time or it should be done as soon as possible after providing supplies to prevent unpredictabe operation of the DAC?
Regards, Victor.
Part Number:DAC8775
Hello,
My design consist of DAC8775, setup in the same manor TIPD216 board (with use of internal buck boosts) with an input power of 24VDC. Internal DVDD is disabled, and 3.3V is connected to the DVDD pin on DAC8775. This again is connected to an processor via SPI. The prosessor has an requirement that no pins, e.g. the SPI pins, should be powered during start-up. So the initial design is to start up DVDD (3.3V power) after the 24VDC is supplied.
The datasheet of DAC8775 (Section 8.3.4 Analog Power Supply) states "It is recommended that DVDD is applied first to reduce output transients." How will these transients behave? Could these transients be harmful for connected load? Should I included an high side MOSFET to control the power sequence forcing DVDD (3.3V) first, then AVDD/PVDD (24VDC)? Or can this be ignored?
Thanks,
Roger
Part Number:AMC1204
Hi team,
My customer is using AMC1204B for motor drive application.
I'd like to know if the primary side power is off(AVDD), meanwhile secondary side DVDD and CLK signal are good, what is the expected output signal? Is it H or L or HI-Z?
Thanks.
Regards,
Patrick
hello
I'am looklin for the qualification report related to the ADC128S052QCMT/NOPB
bests regards
Lionel