MCP3551 SDO/RDY pin latches High or into Floating state after some time...
Hi Has anyone had problems with the MCP3551 RDY pin been latched HIGH? I'm using the MCP3551 in Single Conversion mode in a system with more than one MCP3551 on a single SPI bus, each MCP3551 CS pin is...
View ArticleHV9911 output current regulation not working? (PICAssembler)
(attempting a second post on the same thread, hoping this will appear in contiguous fashion)... If it helps at all, here's my "AN-H55" step-by-step notes regarding choosing the parts: Minimum input...
View ArticleHV9911 output current regulation not working? (PICAssembler)
(umpteenth attempt to get this posted.) Attached to this post is the HV9911 schematic I used for my PCBs...
View ArticleOutput drifting up over a few seconds (NirVM)
Hi Guys, I have implemented the attached analog amplifier circuit to amplify a signal coming from a Wheatstone bridge based pressure sensor. The circuit works but one issue is not clear to me: When I...
View ArticlePAC1934 measurement rate (brptcnz)
When I set a PAC1934 to do 1024 measurements per second, and time the actual measurement rate, I get 1000 measurements per second. I have tried this with 3 PAC1934s on the same circuit and it gives the...
View ArticleHV9911 output current regulation not working? (PICAssembler)
Testing...all I get are Microchip server errors when I try posting my question.....
View ArticleHV9911 output current regulation not working? (PICAssembler)
I hope this is the right place to ask questions about the Microchip (formerly Supertex) HV9911, which I am attempting to use in a boost configuration. (I've successfully used the HV9910C buck LED...
View ArticleMOSFET driver for HF (cadr)
Hello. I was trying to select a MOSFET driver for driving an IRF510 at 7MHz. I have a TC4420, and I simulated this in MPLab Mindi, and it seems it should work. However, on the test bench, having it...
View ArticleLR745 (Emre_Kemsan)
Hello.I want to use LR745 high voltage start-up IC. It's maximum input voltage 450V. How can I use this for 900V input voltage?İf I connect LR745 in series, can I use for 900V?..
View ArticleMCP3913 Data Not Ready Issue (Harlow)
Hi!Recently I've been working on a project where I am using the MCP3913 for a power metering application. I've established proper SPI communication with this chip and am having no issues with that....
View ArticleOutput of MCP6282 is saturated (iqram)
Hi, I am using MCP6282 op-amp to amplify Hall Sensor output from BLDC motor. The output of Hall Sensor is square wave swing of 0 to 500mV when Motor is running. I thought of using MCP6282 in...
View ArticleMCP73831 not charging (gercer)
Hello! 2 years ago I started to design a PCB using a MCP73831T-2ACI/OT and a li-po battery. The battery has a protection circuit. Even though I designed the PCB it is the only time I have worked with a...
View ArticleSY87701A (davehill)
Hello folks,I am having difficulty using the SY8701A CDR…I am feeding in serial data at 167MHz so FreqSel is set to 110b (ratio 6)I am supplying a RefClk of 16.7MHz so DivSel is 10b (ratio 10)I do not...
View ArticleMCP3561 / MCP3562 / MCP3564 Nonsense Conversion Results (andrew1999)
Hello All, Has anyone out there used MCs new MCP356x ADCs at all and got sensible readings out of them? I have a MCP3562 with its REF+ driven direct from a 1.2V from a MCP1501 and REF- to GND, and all...
View ArticlePAC1934 linux driver (kahlenberg)
Hi,I want to connect PAC1934 to Raspberry Pi and I found a driver in the product page but it is quite old and it doesn't even compile...
View ArticleA question about usb HID (mib)
I am totally new to usb interfacing to pic and using pic as an HID, so what books or websites do you recommend for me to start learning and i would be more thankful if you arranged the sources from...
View ArticlePAC1921 and reverse current (torndar)
What happens if I reverse the polarity of the sense pins on the PAC1921 e.g. charging a battery vs discharging? I'm looking at using the PAC 1921 analog output to control a load mosfet for battery...
View ArticleAbout I2C Speed of PAC1934 (Junny1735)
Do you know PAC1934 support I2C standard mode and fast mode ?..
View ArticleMCP4726 VREF range (bklusek)
Hi, The MCP4726 datasheet states that "When the gain is 2, the VREF pin voltage should be limited to a maximum of VDD/2." There is similar verbiage elsewhere in the document. This requirement is not,...
View ArticleMCP4651 5K Rheostat Mode Question (vision4u)
Hi there i would appreciate if i can get some help to sort the following out in my circuit design , I have an non inverting mode NE 5532 op amp fed with symetric +12 / -12 Volts on the supply rails ....
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