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Sync
- MAXQ3180
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(no rating)
2008-12-13 |
Unable to get full technical data on this product.
SPI comms access is very slow (10kHz) rather than the spec's 1MHz when you take into consideration that a 100uS delay is needed between each data byte.
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F_Perez
- Re: MAXQ3180
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(no rating)
2009-02-06 |
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Datasheet is now avaliable.
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Ruben
- Reference designs for MAXQ3180
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(no rating)
2009-02-08 |
There is an article about MAXQ3180 in LiveWire Winter 2008/09 (http://www.maxim-ic.com/LiveWire-Winter08-09). According to it, there is reference designs available, but I don't find it. Can somebody help me, please?
Thanks.
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mates
- Datasheet and versions
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(no rating)
2009-04-20 |
I've samples maxq3180RA3 ,but I could not work properly them.Which datasheet is for A3 (rev.0 or rev.1).While I read 0x851(frequency),result 23215 for 50.000Hz(Fluke 5500A calibrator supplied) not 50000.
Now maxq3180RBN realized ,what is the difference?
Please more clear explanations on your internet site.
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kent
- Re: Datasheet and versions
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(no rating)
2009-05-04 |
Hi Mates - as per email communication, MAXQ3180-RBN is a custom part. The latest revision MAXQ3180 samples have been sent to you.
Best Regards
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hm
- Re: Datasheet and versions
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(no rating)
2009-07-19 |
Has this frequency measurement bug been fixed in the mean time?
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kent
- Re: Re: Datasheet and versions
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(no rating)
2009-07-21 |
Hi hm,
Could you be more specific about the frequency measurement problem you are observing? I am not aware of any frequency measurement bug.
Thank you
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Wilco
- Versions
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(no rating)
2009-08-11 |
Hello,
I have a MAXQ3180-RAN (other text on chip is 0749A2 000AA).
When I read the default data in the register, but this is data like datasheet Rev0;2/08. All the registers are different with datasheet Rev1;1/09. I have also MAXQ3180-RAN (other text on chip is 0912A6 300AC), is this a newer type like datasheet Rev1;1/09? How can I see the difference in revisions?
Best regards,
Wilco.
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kent
- Re: Versions
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(no rating)
2009-08-13 |
Hi Wilco,
0912A6 300AC is the latest revision. A6 stands for revision A6. The other device (0749A2) is A2 revision, and no longer supported. Please replace any A2 parts with A6.
BR
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Ashish
- MAXQ3180
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(no rating)
2009-08-21 |
The main problem is for reading the registers of 3180 we have to follow the flow chart provided in the datasheet.I have checked the response of the IC after every command byte send.Before recieving the data bytes of the registers I am getting 0x41 from IC which means IC is ready for sending me data bytes of registers.But instead of data bytes I am getting values such as 20161 etc.The code written is shown bellow:
void max_3180_read_freq(void)
{
unsigned char *ptr=(unsigned char *)&var;
// unsigned char i;
clear_lcd();
var=0;
CS_MAX=0;
c_check=0;
// use=send_max(0x24); //read operation and 0x040 address of NS register
while((send_max(0x05)!=0xc1) && (++c_check<delay_max));
if(c_check==delay_max)
{
CS_MAX=1;
write_inst_lcd(0xc0);
write_char_lcd('1');
goto error;
}
delay_us(400);
c_check=0;
// use=send_max(0x00);
// send_max(0x02);
while((send_max(0x02)!=0xc2) && (++c_check<delay_max));
if(c_check==delay_max)
{
CS_MAX=1;
write_inst_lcd(0xc0);
write_char_lcd('2');
goto error;
}
delay_us(400);
c_check=0;
// use=send_max(0x00);
while((send_max(0x00)!=0x41) && (++c_check<delay_max));
if(c_check==delay_max)
{
CS_MAX=1;
write_inst_lcd(0xc0);
write_char_lcd('3');
goto error;
}
var=0;
// var1=0;
c_check=0;
ptr[3]=send_max(0x00);
// ptr[2]=send_max(0x00);
// ptr[1]=send_max(0x00);
// delay_us(100);
// ptr[0]=send_max(0x00);
// delay_us(100);
CS_MAX=1;
error:
ptr[2]=0;
ptr[1]=0;
ptr[0]=0;
sprintf(msg_arr,"%lu",var);
write_line_lcd(1,msg_arr);
}
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sophie
- Re: Re: Versions
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(no rating)
2009-08-23 |
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Hi , i have MAXQ3180-RAN+ 0912A6 300AC, the right datasheet is REv 1 1/09?
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Wilco
- Re: MAXQ3180
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(no rating)
2009-08-24 |
Hello Ashish,
The first byte you send is 0x05 and the second byte is 0x02.
So you read one byte on address 0x502. This address doesn't exist. Maybe you must try a known address.
Best regards,
Wilco.
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kent
- Re: MAXQ3180
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(no rating)
2009-08-24 |
Hi Ashish,
The NS register at 0x040 is 4-byte long. To read from the register, the first 2 command bytes should be 0x20 and 0x40. Just want to make sure the listed code is what you are using to read the NS register.
Regards
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sophie
- input voltage adc maxq3180
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(no rating)
2009-08-24 |
the maxim input voltage of adc is 2V, is that a peak
voltage?i'm using 1.024 peak voltage as the vfsadc.i'm using 1.024 peak voltage as the vfsadc that mean 0.724 vrms.when i choose the vfs and ifs, are those peak values?, well i'm assuming they are, but i'm not sure, so if they are peak values then, why in the registers for unit conversion formule use again these peak values instead rms values?
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Wilco
- Write
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(no rating)
2009-08-25 |
Hello,
I have a problem with writing to the MAXQ3180. The dataflow seems like in the datasheet. When I try to write OPMODE1 (0x002) the data is:
CPU > MAXQ
0x80 > 0xC1 CmdByte1
0x02 > 0xC2 CmdByte2
0x01 > 0x41 Data
0x00 > 0x4E Dummy
0x00 > 0x41 Dummy
When I read now register 0x002, it is still 0x00. Other registers I can read correct, there are default value in.
Is there a write protect bit or something?
Best regards,
Wilco.
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kent
- Re: input voltage adc maxq3180
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(no rating)
2009-09-03 |
Hi sophie,
1. Yes, max input of 2V refers to peak
2. VFS and IFS are really transducer scaling ratios. So VFS is the AC input peak voltage that produces 1.024V (peak) on the MAXQ3180 pins. IFS is the AC peak input current that produces 1.024V on the MAXQ3180 pins. 1.024V ~ Vref/2.
Best regards
kent
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kent
- Re: Write
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(no rating)
2009-09-04 |
Hi Wilco,
Writing 0x41 to OPMODE1 is not permitted. Bits 0 and 7:5 of the register are protected.
Best regards
kent
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sophie
- maxq3180_filter
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(no rating)
2009-09-05 |
Hi, i have some doubts about how calculate the coefficients of lpf and hpf of the ic, because in the datasheet don´t tell about the type of the filter or at least the way of calculate it, i mean in the specification of bpf for fundamental mode filter you specifies the way to calculate the coefficient so we can select the frequency of operation, because the frequency by default for fundamental mode filters is 50 Hz, so change to 60 hz was easy with the formula, but in the case of the others filters lpf and hpf you don't say for what cut-off frequency it works, so my doubt is that, what is the cut-off frequency of lpf and hpf? how can I change that values or coefficients? What type of low-pass filters it is? or at least can you give a formula like in the case of fundamental mode filters to calculate it?....and in the other hand with respect to calibration phase offset i think you were wrong in the example in the datasheet because first you say "Now determine the correction factor: treating capacitive values as negative and inductive values as positive, subtract the angle read from the MAXQ3180 from the angle read from the reference meter. The result is the compensation angle.
• Multiply the compensation angle (in radians) by
65,536. This is the value to write into X.PA0.", but in the example you say "Subtract the UUT phase offset from the reference
meter phase offset. In this case, the phase needs to
move 1° toward the capacitive. Convert this value to
radians: 1° x π/180° = 0.0175 radians.
• Multiply this value by 65,536. The result is 572
(0x023C)", so instead multiply the result of
subtraction (1.5°-0.5°) by 65535 an that be the compensation angle to save in PA.0 you multiply 0.5° by 65535 and save in PA0, so correct if I’m wrong, but all foregoing i need to clear as soon as possible, I appreciate a lot you can help with all foregoing.
My best regards
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sophie
- version of maxq3180
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(no rating)
2009-09-05 |
Hi, I have version 0912A6 900AC. Is there a newer version of MAXQ3180? Is version 0912A6 900AC still supported?
Can I use datasheet "19-4674; Rev 2; 8/09" for this version (0912A6 900AC) ?
Thank you very much,
Alexander Martinez
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kent
- Re: version of maxq3180
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(no rating)
2009-09-09 |
Yes, Rev 2/09 datasheet applies to device version 0912A6. The A6 in the text string is the device revision code.
Regards
kent
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