MCP23S17 CS pin and Control byte Address (blukrr)
Dear Experts, I have a question about the CS pin in a multi MCP23S17 chips using the same SPI bus. Do I need to use it at all? I mean what's the purpose of the Control byte Address and the A0, A1, A2...
View ArticleMCP3551 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 ArticleMCP73833 issues on EMC testing (SGHughes42)
I've got a unit which uses the MCP73833 to charge a single 18650 LiPo battery. This is mounted in one case on the base of our unit and connected via a wire to a second logic / display board on the top...
View ArticleMCP73831 vs. MCP73832, tri-state vs. open drain on STAT pin (eliotstock)
Hi there, I'm choosing a charger IC for a new design and am confused about choosing between the MCP73831 and MCP73832. The difference between the two parts is this: Charge Status Output:Tri-State...
View ArticleMCP1700 Low Voltage Shutoff (TimWilson)
Hello,I am using an MCP1700 3.3v device to supply power to a simple circuit. V(in) is a 4.5v battery pack. When V(in) drops to about or below 3.3 volts I expected V(out) to simply cut off, but instead...
View ArticleTC74 thermometer has noise in reading value (sallman)
I'm using a TC74 digital thermometer on a large circuit board to monitor ambient temperature. I created some debug code to send the temperature value to an LCD display so I can monitor the value during...
View ArticleCAP1114 Getting Started (moseph)
I'm trying to get a CapSense CAP1114 working - I hope this is the right forum. I cannot make it answer at all on the I2C bus when connected to an Arduino Nano. So far, I have soldered 3 of them onto...
View ArticleTC9400 VtoF wrong frequency (phmoore)
TC9400 does not operate at the predicted frequency. Setup: Configured for VtoF Ibias = 100kOhm V_zero_adj=3.15V V_GND = 4.95V V_VDD = 12.5V V_VSS = 0V V_VREF = 0V I_IIN = 1.524uA Cref = 5.4nF Cint =...
View Article1825ST-3302e/dc (nickditrolio)
I designed a new product based on the 1825 regulator. The load is a 250ma motor. The motor has a diode flyback in parallel. The voltage at pin 2 is either battery voltage of 3.7 volts or a power...
View ArticleHow to find cause of reset by Overtemperature (vairam.emb)
Hi, I am working in MCP19119 MCU. The MCP19119x has overtemperature shutdown feature, where the temperature of the silicon die is reaches 160 degree the MCU will reset and it clear the OT flag in PCON...
View ArticleMeasuring Skin temp (Joeyg)
Hi All, I'd like to measure skin temp but have concerns about thermal conductivity. I like the MCP9808 but have concerns about how thermally conductive it is against the skin to the IC package.(would a...
View ArticleICP interface accelrometer (Elmek)
Hi, I have a accelrometer with voltage output and I would like to convert it to ICP interface. I have googled a bit but the schematic's is not very helpfull. Has anyone a suggestion to this topic.I...
View ArticleMCP39F521 data units? (sridhar_rajagopal)
Hi, I'm using the MCP39F521 and am reading the various data registers like voltage, current, etc. The datasheet mentions the data size (16 bits, 32 bits, 64 bits) but does not mention the units (or at...
View ArticleSimple transmitter/reciever suitable for underwater usage (stoyanoff)
Greatings! I`m looking for a simple interface allowing transmittion of simple messages like "abc" in water environment. Max range 50-100m. Is there an interface chip allowing stable transmition in...
View ArticleLithium Ion Controller Status Output Toggling (MCP73831) (dontbyte)
I'm using the MCP73831 Lithium Ion Charge Management Controller with a lithium ion coin cell battery (LIR2450). I have an LED circuit attached to the Status pin (STAT) so it should light up while the...
View ArticleMCP73123 Fast charging current accuracy (GuiX)
I can see in the MCP73123 battery charger that the "Fast Charge Current Regulation" accuracy is +/- 10%.Is it any way to reduce that accuracy?Thanks in advance. Regards GuiX..
View ArticleHelp calibrating MCP39F521 (Betarage)
Hello, I am using MCP39F521 with Power Monitor Demonstration Board ADM00686 (9V DC Supply) and Power Monitor Utility (v1.2.0) software. Currently the load I am calibrating is the fan (230V, 0.7A, PF =...
View ArticleMultiple MCP3914 timing weirdness (jrmymllr)
I use three MCP3914 parts connected to a PIC32, and since my particular PIC only has two SPI peripherals I'm multiplexing by changing what pin is assigned to the Slave Select function and using only...
View ArticleMTCH101 start delay (chumeck)
Hi, I have a question about starting up MTCH101 after power on. Why is it able to detect proximity after about 20s? Is there any calibration process in this time? Thanks...
View ArticleMCP73843 Charge Problems (Tuurbo46)
Hi, I have built the example circuit on page 1 of the DS21823D, MCP73843 datasheet using the 100mR resistor and the 0.1uF capacitor. I can charge a 3000mA battery from 3.6V - 4.2V and no error occurs....
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