LMS-6 Radiosonde: Difference between revisions
→Components: Props to N0RC for pointing out U15 is a 555. Updated. |
Paul Rixon (talk | contribs) →Components: Additional component details; markings for unidentified parts |
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==Components== | ==Components== | ||
The following is a catalog of active components. Designators italicized still need positive identification; bold have been positively identified. Markings listed where known to help in identification. List additional markings when they differ. | |||
'''U1''' - GPS - [https://www.trimble.com/embeddedsystems/copernicus2.aspx Trimble 63530-50] - 12-channel GPS, 2x serial ports, 2.7-3.3VDC, SBAS, flash almanac/ephemeris/location storage. (The -50 variant is probably a custom variant, and exact capabilities are unknown.) | |||
''U2 - (Marked G4/905)'' | |||
U3 - [http://web.archive.org/web/20200903011648/https://datasheet.octopart.com/ST72F324J6T6-STMicroelectronics-datasheet-14047.pdf 72F324J6T6 - ST72324 - Main Microcontroller, ST7 series] | '''U3''' - [http://web.archive.org/web/20200903011648/https://datasheet.octopart.com/ST72F324J6T6-STMicroelectronics-datasheet-14047.pdf 72F324J6T6 - ST72324 - Main Microcontroller, ST7 series] - 32K Flash, 1K RAM, 5VDC, 10-bit ADC (16 inputs, muxed), 4x Timer, SPI, SCI, 32-bits total I/O | ||
''U4 - (Marked Z252)'' | |||
'''U5''', '''U6''' - [http://web.archive.org/web/20200206204209/http://www.ti.com/lit/ds/symlink/lp2985.pdf LP2985] - LDO - 2.8V?[[File:U?? - TPS7201Q.jpg|none|thumb|TPS7201Q on PCB]] | |||
[[File:U?? - TPS7201Q.jpg|none|thumb|TPS7201Q on PCB]] | ''U7 - (Marked G4/905)'' | ||
''U8 - (Marked G4/905)'' | |||
U15 - [https://www.ti.com/lit/ds/symlink/lmc555.pdf TI LMC555CMM Family] per the ZC5 marking noted in datasheet. Pinout and footprint matches. | ''U9 - (Marked F50)'' | ||
''U10 - (Did not locate, maybe not placed?)'' | |||
''U11 - (Marked 73RW, SOT-89 or similar) - Pre-amp for GPS ant? In GPS section can.'' | |||
''U12 - (Marked G5/849)'' | |||
'''U13''' - [http://web.archive.org/web/20200214104034/http://www.ti.com/lit/ds/symlink/cd4040b.pdf CD4040BPW] - 12-stage Ripple-Carry Binary Counter/Divider | |||
'''U14''' - [http://web.archive.org/web/20200214042837/http://www.ti.com/lit/ds/symlink/cd74hc4051.pdf CD74HC4051PWR] - High-Speed CMOS Logic Analog Mux/Demux - 8:1 | |||
'''U15''' - [https://www.ti.com/lit/ds/symlink/lmc555.pdf TI LMC555CMM Family] per the ZC5 marking noted in datasheet. Pinout and footprint matches. | |||
'''U16''' - [http://web.archive.org/web/20190417163532/https://www.ti.com/lit/ds/symlink/lmv761.pdf LMV761MF] - Low Voltage Precision Comparator w/ Push-Pull Output | |||
''U17 - (Marked Z252)'' | |||
''U18 - (Did not locate, maybe not placed?)'' | |||
''U19 - (Did not locate, maybe not placed?)'' | |||
''U20 - (Marked H157/82.5; TSOP-8 or similar)'' | |||
'''U21''' - [http://web.archive.org/web/20190202204556/https://www.ti.com/lit/ds/symlink/cc1050.pdf CC1050] (back) - Low Power Transmitter - 300MHz-1000MHz, variable power, FSK | |||
'''U22''' - [http://web.archive.org/web/20200223104004/http://www.ti.com/lit/ds/symlink/tps791.pdf TPS79133DBUR] - 3.3V LDO - for U21 | |||
''Unot_marked (23/24?) - (Marked W6K/W76) - RF Amp, similar to SKY65013-70LF (No designator; under TX can to bottom-right of U21.)'' | |||
'''U25''' - [http://web.archive.org/web/20200123234645/https://www.ti.com/lit/ds/symlink/tps72.pdf TPS7201Q] - Adj. 1.2-9.75V LDO - (Designator silkscreen is hard to read; 8-SOIC on bottom-right)[[File:U?? - TPS7201Q.jpg|none|thumb]] | |||
[[File:Screenshot 20200904-195417.png|thumb|92JK ZC5 chip noted as U15]] | [[File:Screenshot 20200904-195417.png|thumb|92JK ZC5 chip noted as U15]] | ||
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Sens 4 - Capacitive Relative humidity sensor | Sens 4 - Capacitive Relative humidity sensor | ||