Difference between revisions of "Emg 2009"
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=spiemg1 SCH/PCB= | =spiemg1 SCH/PCB= | ||
*8 channel PRE-AMP style EMG amplifier with SPI interface | *8 channel PRE-AMP style EMG amplifier with SPI interface | ||
*SCH [http://18.85.17.197/for_wiki/spiemg-2010-jan/hc_spiemg1-010810.pdf] | *SCH [http://18.85.17.197/for_wiki/spiemg-2010-jan/hc_spiemg1-010810.pdf] | ||
| + | *SCH for 3.3V switcher : [http://18.85.17.197/for_wiki/spiemg-2010-jan/hc_lt-3v3-011310.pdf] | ||
| + | *SCH for 5.4V switcher : [http://18.85.17.197/for_wiki/spiemg-2010-jan/hc_lt-5v4-011310.pdf] | ||
| + | |||
*PCB TOP SIDE [http://18.85.17.197/for_wiki/spiemg-2010-jan/spiemg1t.pdf] | *PCB TOP SIDE [http://18.85.17.197/for_wiki/spiemg-2010-jan/spiemg1t.pdf] | ||
*PCB BOT SIDE [http://18.85.17.197/for_wiki/spiemg-2010-jan/spiemg1b.pdf] | *PCB BOT SIDE [http://18.85.17.197/for_wiki/spiemg-2010-jan/spiemg1b.pdf] | ||
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*[http://focus.ti.com/docs/prod/folders/print/ads1258.html ADS1258 PDF] 24bit, 16 ch, 2 supplies | *[http://focus.ti.com/docs/prod/folders/print/ads1258.html ADS1258 PDF] 24bit, 16 ch, 2 supplies | ||
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| + | ==assembly instructions== | ||
| + | *Start by assembling the 3.3V switching regulator and then testing it by verifying 3.3V at TP7. This module has reference designator in the 80s and physical reside in a tight location of the top side of the PCB. | ||
| + | |||
| + | *To power the 3.3V switcher you'll need to apply ~5V to V.PROT from a ~100mA current limited supply. A successful test is the output of 3.3V, with nothing getting hot. To apply power, you may wish to install P1, F1, and D1 and use one of my power pole to 1.25mm adapters. | ||
| + | |||
| + | *Next assemble the 5.4V switcher (refdes 90s) and test with ~7V. Verify ~5.4V at TP6. | ||
| + | *Assemble the -5V switcher (UN1 and support components) and test with ~7V. Verify ~-5V at TP10 | ||
| + | *Assemble the +- 2.5V linear regulators (UA1, UA2, and support). Verify +-2.5V at TP8 and TP12. | ||
| + | *Assemble the ADC voltage reference (UR1, UR2 and support). For UR2 use REF3312 in the kit. Verify at TP18 that you see -1.3V WRT to GND, or 1.2V WRT to the -2.5V. | ||
| + | *At this point, it should be safe to assemble the primary IC US1 and the remainder of the PCB. | ||
| + | |||
=paconn1 SCH/PCB= | =paconn1 SCH/PCB= | ||
Revision as of 21:18, 13 January 2010
spiemg1 SCH/PCB
- 8 channel PRE-AMP style EMG amplifier with SPI interface
- SCH [1]
- SCH for 3.3V switcher : [2]
- SCH for 5.4V switcher : [3]
- ADS1258 PDF 24bit, 16 ch, 2 supplies
assembly instructions
- Start by assembling the 3.3V switching regulator and then testing it by verifying 3.3V at TP7. This module has reference designator in the 80s and physical reside in a tight location of the top side of the PCB.
- To power the 3.3V switcher you'll need to apply ~5V to V.PROT from a ~100mA current limited supply. A successful test is the output of 3.3V, with nothing getting hot. To apply power, you may wish to install P1, F1, and D1 and use one of my power pole to 1.25mm adapters.
- Next assemble the 5.4V switcher (refdes 90s) and test with ~7V. Verify ~5.4V at TP6.
- Assemble the -5V switcher (UN1 and support components) and test with ~7V. Verify ~-5V at TP10
- Assemble the +- 2.5V linear regulators (UA1, UA2, and support). Verify +-2.5V at TP8 and TP12.
- Assemble the ADC voltage reference (UR1, UR2 and support). For UR2 use REF3312 in the kit. Verify at TP18 that you see -1.3V WRT to GND, or 1.2V WRT to the -2.5V.
- At this point, it should be safe to assemble the primary IC US1 and the remainder of the PCB.
