Difference between revisions of "POT2 BOM"

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|2 || RO1, RO3 ||  RHM20.0KCCT-ND || 20K 1% EIA0805 || [http://www.digikey.com/scripts/DkSearch/dksus.dll?PName?Name=RHM20.0KCCT-ND DIG] || ? ||  
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|2 || RO1, RO3 ||  RHM20.0KCCT-ND || 20K 1% EIA0805 || [http://www.digikey.com/scripts/DkSearch/dksus.dll?PName?Name=RHM20.0KCCT-ND DIG] || 0.038 || Note : Adjust value to limit range of offset adjustment
 
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|1 || CO1 || NA  || do not populate|| [http://www.digikey.com/scripts/DkSearch/dksus.dll?PName?Name= DIG] || ? ||  
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|1 || CO1 || NA  || do not populate|| [http://www.digikey.com/scripts/DkSearch/dksus.dll?PName?Name= DIG] || xx || Note : Cap from Offset to GND not good.
 
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|1 || UA1 || INA128UA-ND  || Instrumentation amp, BurrBrown SOIC8 || [http://www.digikey.com/scripts/DkSearch/dksus.dll?PName?Name=INA128UA-ND DIG] || ? || gail = 1+50K/RA1
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|1 || UA1 || INA128UA-ND  || Instrumentation amp, BurrBrown SOIC8 || [http://www.digikey.com/scripts/DkSearch/dksus.dll?PName?Name=INA128UA-ND DIG] || ? || gain = 1+50K/RA1
 
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|1 || RA1  || open || for gain=1 do not populate EIA0805 || [http://www.digikey.com/scripts/DkSearch/dksus.dll?PName?Name= DIG] || ? ||  
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|1 || RA1  || open (gain=1) || RES 1% EIA0805 || [http://www.digikey.com/scripts/DkSearch/dksus.dll?PName?Name= DIG] || xx || gain=1+50K/RA1
 
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|1 || RA2 || NA  || do not populate || [http://www.digikey.com/scripts/DkSearch/dksus.dll?PName?Name= DIG] || ? ||  
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|1 || RA2 || NA  || do not populate || [http://www.digikey.com/scripts/DkSearch/dksus.dll?PName?Name= DIG] || xx || Note : was part of RC filter, but DRV135 input impeedance is "small"
 
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|1 || CA1 || NA  || do not populate || [http://www.digikey.com/scripts/DkSearch/dksus.dll?PName?Name= DIG] || ? ||  
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|1 || CA1 || NA  || do not populate || [http://www.digikey.com/scripts/DkSearch/dksus.dll?PName?Name= DIG] || xx || Note : was part of RC filter, but without R, INA128 can't drive C
 
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|2 ||RR1,RR4  || RHM698CCT-ND  || 698 ohm 1% 0805 resistor || [http://www.digikey.com/scripts/DkSearch/dksus.dll?PName?Name=RHM698CCT-ND DIG] || ? ||  
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|2 ||RR1,RR4  || RHM698CCT-ND  || 698 ohm 1% 0805 resistor || [http://www.digikey.com/scripts/DkSearch/dksus.dll?PName?Name=RHM698CCT-ND DIG] || 0.038 || NOTE : Adjust value to provide at least 3ma over total reference current
 
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|1 || RR2 ||  RHM3.00KCCT-ND || 3k EIA0805 1% || [http://www.digikey.com/scripts/DkSearch/dksus.dll?PName?Name= DIG] || ? ||  
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|1 || RR2 ||  RHM2.94KCCT-ND || 2.94k EIA0805 1% || [http://www.digikey.com/scripts/DkSearch/dksus.dll?PName?Name=RHM2.94KCCT-ND DIG] || 0.038 || Vref = 2.5V + 2.5*RR2/RR3
 
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|1 || RR3 ||  RHM1.00KCCT-ND || 1k EIA0805 1% || [http://www.digikey.com/scripts/DkSearch/dksus.dll?PName?Name= DIG] || ? ||  
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|1 || RR3 ||  RHM1.00KCCT-ND || 1k EIA0805 1% || [http://www.digikey.com/scripts/DkSearch/dksus.dll?PName?Name=RHM1.00KCCT-ND DIG] || 0.038 ||  
 
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|1 || UR1 || TL1431CD-ND  || precision adjustable shunt reference in SOIC8 || [http://www.digikey.com/scripts/DkSearch/dksus.dll?PName?Name= DIG] || ? ||  
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|1 || UR1 || TL1431CD-ND  || precision adjustable shunt reference in SOIC8 || [http://www.digikey.com/scripts/DkSearch/dksus.dll?PName?Name=TL1431CD-ND DIG] || ? ||  
 
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|1 || CR1 || 399-1563-1-ND  || 10uF, 10V tant 3216  || [http://www.digikey.com/scripts/DkSearch/dksus.dll?PName?Name= DIG] || ? || >6uF, 10V
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|1 || CR1 || 399-1563-1-ND  || 10uF, 10V tant 3216  || [http://www.digikey.com/scripts/DkSearch/dksus.dll?PName?Name=399-1563-1-ND DIG] || ? || NOTE : >6uF for reference stability, >Vref for cap protection
 
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|2 || RL1, RL2  || RHM1.00KCCT-ND  || 1k EIA0805 || [http://www.digikey.com/scripts/DkSearch/dksus.dll?PName?Name=RHM1.00KCCT-ND DIG] || ? ||  
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|2 || RL1, RL2  || RHM1.00KCCT-ND  || 1k EIA0805 || [http://www.digikey.com/scripts/DkSearch/dksus.dll?PName?Name=RHM1.00KCCT-ND DIG] || ? || NOTE : value depends on reference voltage, RLx = 0.5 * (Vref-4V) / 3mA
 
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|2 || DL1,DL2 || P503CT-ND  || || [http://www.digikey.com/scripts/DkSearch/dksus.dll?PName?Name= DIG] || ? ||  
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|2 || DL1,DL2 || P503CT-ND  || gull wing SMT red LED || [http://www.digikey.com/scripts/DkSearch/dksus.dll?PName?Name=P503CT-ND DIG] || ? ||  
 
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|2 || CD1,CD3 || 399-3098-1-ND  || 10u, 16V tant sizeA (3216)  || [http://www.digikey.com/scripts/DkSearch/dksus.dll?PName?Name= DIG] || ? ||  
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|2 || CD1,CD3 || 399-3098-1-ND  || 10u, 16V tant size-A (3216)  || [http://www.digikey.com/scripts/DkSearch/dksus.dll?PName?Name=399-3098-1-ND DIG] || ? ||  
 
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|2 || CD2,CD4 || PCC1828CT-ND  || 0.1u, 25V X7R multilayer ceramic  || [http://www.digikey.com/scripts/DkSearch/dksus.dll?PName?Name= DIG] || ? ||  
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|2 || CD2,CD4 || PCC1828CT-ND  || 0.1u, 25V X7R EIA0805 multilayer ceramic  || [http://www.digikey.com/scripts/DkSearch/dksus.dll?PName?Name=PCC1828CT-ND DIG] || ? ||  
 
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Revision as of 18:08, 25 June 2005

POT2 Bill of Materials


POT2 (REV-0)
NUM REFDES Part# Desc Source Price Notes
1 P1 WM4201-ND 3 pin, 0.1" molex header DIG 0.34 mates with : WM2012-ND and requires pins WM2312-ND or WM1114-ND
2 RO1, RO3 RHM20.0KCCT-ND 20K 1% EIA0805 DIG 0.038 Note : Adjust value to limit range of offset adjustment
1 CO1 NA do not populate DIG xx Note : Cap from Offset to GND not good.
1 RO2 ST3A103CT-ND 10K 3mm trimpot DIG 1.56 ALT: TC73x-103ect-ND
1 UA1 INA128UA-ND Instrumentation amp, BurrBrown SOIC8 DIG  ? gain = 1+50K/RA1
1 RA1 open (gain=1) RES 1% EIA0805 DIG xx gain=1+50K/RA1
1 RA2 NA do not populate DIG xx Note : was part of RC filter, but DRV135 input impeedance is "small"
1 CA1 NA do not populate DIG xx Note : was part of RC filter, but without R, INA128 can't drive C
1 UB1 DRV135UA-ND differential driver SOIC8 DIG  ?
1 P2 WM4203-ND 5-pin 0.1" molex DIG  ? mates with WM2014-ND and requires pins WM2312-ND or WM1114-ND
2 RR1,RR4 RHM698CCT-ND 698 ohm 1% 0805 resistor DIG 0.038 NOTE : Adjust value to provide at least 3ma over total reference current
1 RR2 RHM2.94KCCT-ND 2.94k EIA0805 1% DIG 0.038 Vref = 2.5V + 2.5*RR2/RR3
1 RR3 RHM1.00KCCT-ND 1k EIA0805 1% DIG 0.038
1 UR1 TL1431CD-ND precision adjustable shunt reference in SOIC8 DIG  ?
1 CR1 399-1563-1-ND 10uF, 10V tant 3216 DIG  ? NOTE : >6uF for reference stability, >Vref for cap protection
2 RL1, RL2 RHM1.00KCCT-ND 1k EIA0805 DIG  ? NOTE : value depends on reference voltage, RLx = 0.5 * (Vref-4V) / 3mA
2 DL1,DL2 P503CT-ND gull wing SMT red LED DIG  ?
2 CD1,CD3 399-3098-1-ND 10u, 16V tant size-A (3216) DIG  ?
2 CD2,CD4 PCC1828CT-ND 0.1u, 25V X7R EIA0805 multilayer ceramic DIG  ?
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