Hellow! I'm a research in korea.
I have a question for AFE0064 Chip
I'm watching your reference circuit for AFE0064. Then, i don't understand why you are connected VSS pin(73, 90, 91) & NC pin(58) with TMCLK, TMDATA, DFT_TIMER and VTESTC respectively.
The TMCLK, TMDATA and DFT_TIMER (ie pins 73, 90, 91) need to be grounded and VTESTC (pin 58) needs to be floated in actual application.
I appriciate your reply.
i would like to attain AFE0064 Chip's Referece note or Reference mannuel
Please.... i want to buy AFE0064 Reference board also..
The afe0064 reference board is not available as yet. If you need any information meanwhile, please let me know.
Then, i want to receive AFE0064 material related.
For example, reference manual or reference circuits or ets.
I will mail the reference circuit next week as we are still finalizing it.
By-the-by, could you give me an idea of the application you are targeting?
i'm developing ROIC module about Infrared sensor. So we choiced AFE0064 Chip for ROIC.
Now, i'm going to test about AFE0064 Chip with ADS8363.
So, I want to know about AFE0064 output patttern. Either after integration, dataout started or after data out, integration started.
My e-mail: email@example.com
We are doing final touches to the reference circuit. I will mail it when ready.
The afe0064 output corresponds to the data in the previous integration as shown below. So, the integration has to be over (ie SHS over) before we can read out the data from that integration.
Have you considered using DDC264? It comes with a built-in ADC.
I'm very please of contact you and I have a request below list.
I'd like to your support.
>Application : Xray sensor test board
>Current part : Indigo
>part : AFE0064
>Request : Reference Guide(EVM Schematic,,) and document.
Avnet-korea / Eddy Lee
Is there any more information on AFE0064, like application notes?
Unfortunately, it is not available. If there is any specific question in mind, do let me know. My email address is firstname.lastname@example.org
1. what are the value of the on chip integrating capacitors for each of the 64 channel?
2. what does the seven analog input range mean, range 0 for 0.13 pC to range 7 9.6pC?
3. do you have any related circuit diagram showing how to use this device for the detection of current from a 8 times 8 photodiode array?
1. The integrating capacitor value = charge range/1.4V (eg, for range 7, the charge range is 9.6pC. Hence the cap is 9.6/1.4 = 6.85pF
2. This is the range for which the signal chain (from integrator to Driver output) is very linear. For eg., in range 7, the signal chain can accept 0pC to 9.6pC (for 0pC input charge, the driver o/p will be -fullscale (ie -1.4V) and for 9.6pC input charge, the driver output will be +fullscale (ie +1.4V), between these, the signal chain is linear.
3. Is this a photodiode with switch (like a TFT+ photodiode array) or only photodiode array (ie continuous current integration)?
Thank you for your reply.
How do you select the range? So for range 0 of 0.13 pC, the on chip integrating capacitor is 0.13/1.4=93fF?
The photodiode array does not have a switch. But the signal is not continuous, it is pulses of light. For example, several minisecond wide pulses every duty cycle (20ms). So I think hold it in reset mode before the pulses arrive, do the integration of charges, then rest waiting for the next cycle.
The range is selected by the PGA(2:0) pins.
Yes, you are correct on the integration capacitor for range 0.
Yes, it should work with the timing you are mentioning. Can you tell me what application this is?
28.32 μSec Min Scan Time (including integration and data transfer for all 64 channels). This means 28.32 uSec to acquire one data point for each of all the 64 channels simultaneously, right?
I hope this could be used to detect ion current from a lot of channels which is very similar to the x ray panel detector. But what I need is ion current versus time, not the final accumulated charge. Your device IVC102 could be used to integrated charges and convert to voltage. I am just think if this AFE0064 could be just used like 64 IVC102 simultaneously?
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