Difference between revisions of "POT4 Bill of Materials"

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|1 || PC1 || WM4203-ND || 5 pin, 0.1" molex header || [http://www.digikey.com/scripts/DkSearch/dksus.dll?PName?Name=wm4203-nd DIG] || 0.59 ||  
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|1 || PC1 || WM4203-ND || 5 pin, 0.1" molex header || [http://www.digikey.com/scripts/DkSearch/dksus.dll?PName?Name=wm4203-nd DIG] || 0.59 || mates with : WM2014-ND and requires pins WM2312-ND or WM1114-ND
 
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|1 || CC3 || ? || 1 meg EIA0805  || DIG || ? || optional - stack over CC3 to provide 0 input for no input connection
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|1 || CC3 || RHM1.00MCCT-ND || 1 meg EIA0805  || [http://www.digikey.com/scripts/DkSearch/dksus.dll?PName?Name=RHM1.00MCCT-ND DIG] || 0.038 || optional - stack over CC3 to provide 0 input for no input connection
 
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|1 || RO1 || 3266W-103-ND(POT), 3266W-503ND(bridge) || (burns3266w) multiturn trim pot  || [http://www.digikey.com/scripts/DkSearch/dksus.dll?PName?Name=3266W-103-ND DIG] || ? || 10K for POT, 50K for bridge
+
|1 || RO1 || 3266W-103-ND(POT), 3266W-503ND(bridge) || (burns3266w) multiturn trim pot  || [http://www.digikey.com/scripts/DkSearch/dksus.dll?PName?Name=3266W-103-ND DIG] || $3.58 || 10K for POT, 50K for bridge
 
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|1 || U1 || 296-1390-5-ND|| LM324 quad opamp SO14 (narrow) package || [http://www.digikey.com/scripts/DkSearch/dksus.dll?PName?Name=296-1390-5-ND DIG] || ? || ALTs : quad opamp (Vsup > 32)
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|1 || U1 || 296-1390-5-ND|| LM324 quad opamp SO14 (narrow) package || [http://www.digikey.com/scripts/DkSearch/dksus.dll?PName?Name=296-1390-5-ND DIG] || 0.45 || ALTs : quad opamp (Vsup > 32)
 
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|1 || JF1 || S1012-36-ND || 36 pin 0.1" header pins (36) || [http://www.digikey.com/scripts/DkSearch/dksus.dll?PName?Name=S1012-36-ND DIG] || ? || this part is 36 pins, 4 pins are needed to make a 3way jumper
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|1 || JF1 || S1012-36-ND (populates 9) || 36 pin 0.1" header pins (4 needed from strip)|| [http://www.digikey.com/scripts/DkSearch/dksus.dll?PName?Name=S1012-36-ND DIG] || 1.03/9  || this part is 36 pins, 4 pins are needed to make a 3way jumper
 
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|1 || JF1 || S9000-ND || 0.1" shorting jumper || [http://www.digikey.com/scripts/DkSearch/dksus.dll?PName?Name=S9000-ND DIG] || ? || used to select amplifer filter path
+
|1 || JF1 || S9000-ND || 0.1" shorting jumper || [http://www.digikey.com/scripts/DkSearch/dksus.dll?PName?Name=S9000-ND DIG] || 0.093 || used to select amplifer filter path
 
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|2 || RF1,RF2 || RHM13.3KCCT-ND || 13.3K 1% EIA0805 || [http://www.digikey.com/scripts/DkSearch/dksus.dll?PName?Name=RHM13.3KCCT-ND DIG] || ?
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|2 || RF1,RF2 || RHM13.3KCCT-ND || 13.3K 1% EIA0805 || [http://www.digikey.com/scripts/DkSearch/dksus.dll?PName?Name=RHM13.3KCCT-ND DIG] || 0.038
 
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|1 || RF3 || RHM6.65KCCT-ND || 6.65K 1% EIA0805 || [http://www.digikey.com/scripts/DkSearch/dksus.dll?PName?Name=RHM6.65CCT-ND DIG] || ?
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|1 || RF3 || RHM6.65KCCT-ND || 6.65K 1% EIA0805 || [http://www.digikey.com/scripts/DkSearch/dksus.dll?PName?Name=RHM6.65KCCT-ND DIG] || 0.038
 
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|1 || CF1 || 490-1635-1-ND || 5.1nF EIA0805 || [http://www.digikey.com/scripts/DkSearch/dksus.dll?PName?Name=490-1635-1-ND DIG] || ?
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|1 || CF1 || 490-1635-1-ND || 5.1nF EIA0805 || [http://www.digikey.com/scripts/DkSearch/dksus.dll?PName?Name=490-1635-1-ND DIG] || 0.27
 
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|1 || CF2 || 490-1644-1-ND || 22nF EIA0805 || [http://www.digikey.com/scripts/DkSearch/dksus.dll?PName?Name=490-1644-1-ND DIG] || ?
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|1 || CF2 || 490-1644-1-ND || 22nF EIA0805 || [http://www.digikey.com/scripts/DkSearch/dksus.dll?PName?Name=490-1644-1-ND DIG] || 0.457
 
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! || || 2nd LP filter
 
! || || 2nd LP filter
 
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| 1 || CF3 || 490-1632-1-ND || 3.3nF EIA0805 || [http://www.digikey.com/scripts/DkSearch/dksus.dll?PName?Name=490-1632-1-ND DIG] || ?
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| 1 || CF3 || 490-1632-1-ND || 3.3nF EIA0805 || [http://www.digikey.com/scripts/DkSearch/dksus.dll?PName?Name=490-1632-1-ND DIG] || 0.205
 
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| 1 || CF4 || 490-1644-1-ND || 22nF EIA0805 || [http://www.digikey.com/scripts/DkSearch/dksus.dll?PName?Name=490-1644-1-ND DIG] || ?
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| 1 || CF4 || 490-1644-1-ND || 22nF EIA0805 || [http://www.digikey.com/scripts/DkSearch/dksus.dll?PName?Name=490-1644-1-ND DIG] || 0.457
 
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|2 || RF4,RF5 || RHM6.65KCCT-ND || 6.65K 1% EIA0805 || [http://www.digikey.com/scripts/DkSearch/dksus.dll?PName?Name=RHM6.65KCCT-ND DIG] || ?
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|2 || RF4,RF5 || RHM6.65KCCT-ND || 6.65K 1% EIA0805 || [http://www.digikey.com/scripts/DkSearch/dksus.dll?PName?Name=RHM6.65KCCT-ND DIG] || 0.038
 
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|1 || RD1 || 311-4.99MCCT-ND || 4.99M 1% EIA0805 || [http://www.digikey.com/scripts/DkSearch/dksus.dll?PName?Name=311-4.99MCCT-ND DIG] || ?
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|1 || RD1 || 311-4.99MCCT-ND || 4.99M 1% EIA0805 || [http://www.digikey.com/scripts/DkSearch/dksus.dll?PName?Name=311-4.99MCCT-ND DIG] || 0.08
 
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|1 || RD2 || RHM3.00KCCT-ND || 3.0K 1% EIA0805 || [http://www.digikey.com/scripts/DkSearch/dksus.dll?PName?Name=RHM3.00KCCT-ND DIG] || ?
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|1 || RD2 || RHM3.00KCCT-ND || 3.0K 1% EIA0805 || [http://www.digikey.com/scripts/DkSearch/dksus.dll?PName?Name=RHM3.00KCCT-ND DIG] || 0.038
 
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|1 || CD1 || PCC101CGCT-ND || 100pF EIA0805 || [http://www.digikey.com/scripts/DkSearch/dksus.dll?PName?Name=PCC101CGCT-ND DIG] || ?
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|1 || CD1 || PCC101CGCT-ND || 100pF EIA0805 || [http://www.digikey.com/scripts/DkSearch/dksus.dll?PName?Name=PCC101CGCT-ND DIG] || 0.049
 
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|1 || CD2 || 490-1673-1-ND || 0.1u EIA0805 25V X7R|| [http://www.digikey.com/scripts/DkSearch/dksus.dll?PName?Name=490-1673-1-ND DIG] || ?
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|1 || CD2 || 490-1673-1-ND || 0.1u EIA0805 25V X7R|| [http://www.digikey.com/scripts/DkSearch/dksus.dll?PName?Name=490-1673-1-ND DIG] || 0.132 || larger value will improved low frequency performance
 
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| 2 || RB1,RB2 || P0.0ACT-ND || 0.0 ohm EIA0805 || [http://www.digikey.com/scripts/DkSearch/dksus.dll?PName?Name=P0.0ACT-ND DIG] || ? || increase R for output RC filter by adding matched precision resistors here.  Driver output is already 50 ohm.
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| 2 || RB1,RB2 || P0.0ACT-ND || 0.0 ohm EIA0805 || [http://www.digikey.com/scripts/DkSearch/dksus.dll?PName?Name=P0.0ACT-ND DIG] || 0.077 || increase R for output RC filter by adding matched precision resistors here.  Driver output is already 50 ohm.
 
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| 1 || CB1 || PCC1863CT-ND || 0.1uF 50V EIA0805 Y5V || [http://www.digikey.com/scripts/DkSearch/dksus.dll?PName?Name=PCC1863CT-ND DIG] || ? || use 25V or larger bipolar precision cap here to increase C in output RC filter.    Total C is CB1 + CB2
+
| 1 || CB1 || PCC1864CT-ND || 0.1uF 50V EIA0805 Y5V || [http://www.digikey.com/scripts/DkSearch/dksus.dll?PName?Name=PCC1864CT-ND DIG] || 0.072 || use 25V or larger bipolar precision cap here to increase C in output RC filter.    Total C is CB1 + CB2
 
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| 1 || CB2 || 495-1087-ND || 1uF, 50V (bipolar) metalized poly cap || [http://www.digikey.com/scripts/DkSearch/dksus.dll?PName?Name=495-1087-ND DIG] || ? || output RC filter is CB1 + CB2
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| 1 || CB2 || 495-1087-ND || 1uF, 50V (bipolar) metalized poly cap || [http://www.digikey.com/scripts/DkSearch/dksus.dll?PName?Name=495-1087-ND DIG] || 0.41 || output RC filter is CB1 + CB2
 
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| 1 || UB1 || DRV135UA || differential driver in SO8 package || [http://www.digikey.com/scripts/DkSearch/dksus.dll?PName?Name=DRV135UA DIG] || ? ||  
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| 1 || UB1 || DRV135UA-ND || differential driver in SO8 package || [http://www.digikey.com/scripts/DkSearch/dksus.dll?PName?Name=DRV135UA-ND DIG] || 4.39 ||  
 
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| 1 || PN1 || WM4203-ND || 0.1" 5pin molex header || [http://www.digikey.com/scripts/DkSearch/dksus.dll?PName?Name=WM4203-ND DIG] || ? || mates with :
+
| 1 || PN1 || WM4203-ND || 0.1" 5pin molex header || [http://www.digikey.com/scripts/DkSearch/dksus.dll?PName?Name=WM4203-ND DIG] || 0.59 || mates with : WM2014-ND and requires pins WM2312-ND or WM1114-ND
 
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| 2 || RB3, RB4 || P0.0ACT-ND || 0.0 ohm || [http://www.digikey.com/scripts/DkSearch/dksus.dll?PName?Name=P0.0ACT-ND DIG] || ? || see notes for RB1,RB2
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| 2 || RB3, RB4 || P0.0ACT-ND || 0.0 ohm || [http://www.digikey.com/scripts/DkSearch/dksus.dll?PName?Name=P0.0ACT-ND DIG] || 0.077 || see notes for RB1,RB2
 
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| 1 || CB3 || PCC1863CT-ND || 0.1uF 50V EIA0805 Y5V|| [http://www.digikey.com/scripts/DkSearch/dksus.dll?PName?Name=PCC1863CT-ND DIG] || ? ||  
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| 1 || CB3 || PCC1864CT-ND || 0.1uF 50V EIA0805 Y5V|| [http://www.digikey.com/scripts/DkSearch/dksus.dll?PName?Name=PCC1864CT-ND DIG] || 0.072 ||  
 
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| 1 || CB4 || 495-1087-ND || 1uF, 50V (bipolar) metalized poly cap || [http://www.digikey.com/scripts/DkSearch/dksus.dll?PName?Name=495-1087-ND DIG] || ? || output RC filter is CB3 + CB4
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| 1 || CB4 || 495-1087-ND || 1uF, 50V (bipolar) metalized poly cap || [http://www.digikey.com/scripts/DkSearch/dksus.dll?PName?Name=495-1087-ND DIG] || 0.41 || output RC filter is CB3 + CB4
 
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| 1 || UB2 || DRV135UA || differential driver in SO8 package || [http://www.digikey.com/scripts/DkSearch/dksus.dll?PName?Name=DRV135UA DIG] || ? ||  
+
| 1 || UB2 || DRV135UA-ND || differential driver in SO8 package || [http://www.digikey.com/scripts/DkSearch/dksus.dll?PName?Name=DRV135UA-ND DIG] || 4.39 ||  
 
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| 1 || PN2 || WM4200-ND || 0.1" 2pin molex header || [http://www.digikey.com/scripts/DkSearch/dksus.dll?PName?Name=WM4200 DIG] || 0.31 || mates with :
+
| 1 || PN2 || WM4200-ND || 0.1" 2pin molex header || [http://www.digikey.com/scripts/DkSearch/dksus.dll?PName?Name=WM4200-ND DIG] || 0.34 || mates with : WM2011-ND and requires pins WM2312-ND or WM1114-ND
 
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| 4 || RR1, RR4 || RHM1.60KCCT-ND || 1.60K 1/8watt EIA0805 || [http://www.digikey.com/scripts/DkSearch/dksus.dll?PName?Name=RHM1.60KCCT-ND DIG] || ? || pair of resistors stacked to increase power to 1/4watt
+
| 4 || RR1, RR4 || RHM1.60KCCT-ND || 1.60K 1/8watt EIA0805 || [http://www.digikey.com/scripts/DkSearch/dksus.dll?PName?Name=RHM1.60KCCT-ND DIG] || 0.038 || pair of resistors stacked to increase power to 1/4watt
 
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| 1 || RR2 || RHM7.32KCCT-ND || 7.32K 1% EIA0805 || [http://www.digikey.com/scripts/DkSearch/dksus.dll?PName?Name=RHM7.32KCCT-ND DIG] || ? ||
+
| 1 || RR2 || RHM7.32KCCT-ND || 7.32K 1% EIA0805 || [http://www.digikey.com/scripts/DkSearch/dksus.dll?PName?Name=RHM7.32KCCT-ND DIG] || 0.038 ||
 
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| 1 || RR3 || RHM2.49KCCT-ND || 2.49K 1% EIA0805 || [http://www.digikey.com/scripts/DkSearch/dksus.dll?PName?Name=RHM2.49KCCT-ND DIG] || ? ||
+
| 1 || RR3 || RHM2.49KCCT-ND || 2.49K 1% EIA0805 || [http://www.digikey.com/scripts/DkSearch/dksus.dll?PName?Name=RHM2.49KCCT-ND DIG] || 0.038 ||
 
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| 1 || UR1 || 296-10129-6-ND || TL1431CD adjustable voltage reference in SO8 package || [http://www.digikey.com/scripts/DkSearch/dksus.dll?PName?Name=296-10129-6-ND DIG] || 0.72 ||  
+
| 1 || UR1 || 296-10129-1-ND || TL1431CD adjustable voltage reference in SO8 package || [http://www.digikey.com/scripts/DkSearch/dksus.dll?PName?Name=296-10129-1-ND DIG] || 0.72 ||  
 
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| 1 || CR1 || 493-2374-1-ND || 6.8V, 16V tant (size A / 3216) || [http://www.digikey.com/scripts/DkSearch/dksus.dll?PName?Name=493-2374-1-ND DIG] || ? || > 6.8uF to avoid reference instability
+
| 1 || CR1 || 493-2374-1-ND || 6.8V, 16V tant (size A / 3216) || [http://www.digikey.com/scripts/DkSearch/dksus.dll?PName?Name=493-2374-1-ND DIG] || 0.209 || > 6.8uF to avoid reference instability
 
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| 2 || CE1,CE3 || || 2.2uF 16V tant (Size A / 3216) || [http://www.digikey.com/scripts/DkSearch/dksus.dll?PName?Name= DIG] || ? || require : C>1.0uF, V>=16V size A tant
+
| 2 || CE1,CE3 || 493-2365-1-ND || 10uF 16V tant (Size A / 3216) || [http://www.digikey.com/scripts/DkSearch/dksus.dll?PName?Name=493-2365-1-ND DIG] || 0.26 || require : C>1.0uF, V>=16V size A tant
 
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| 2 || CE2, CE4 || PCC1853CT-ND || 0.1uF EIA0805 25V Y5V || [http://www.digikey.com/scripts/DkSearch/dksus.dll?PName?Name=PCC1853CT-ND DIG] || ? || require : 0.1u chip cap
+
| 2 || CE2, CE4 || PCC1853CT-ND || 0.1uF EIA0805 25V Y5V || [http://www.digikey.com/scripts/DkSearch/dksus.dll?PName?Name=PCC1853CT-ND DIG] || 0.052 || require : 0.1u chip cap
 
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| 2 || RL1,RL2 ||  RHM2.7ACT-ND || 2.7K EIA0805 5% || [http://www.digikey.com/scripts/DkSearch/dksus.dll?PName?Name=RHM2.7ACT-ND DIG] || ? || 2k to 3k resistor is fine
+
| 2 || RL1,RL2 ||  RHM2.70kcCT-ND || 2.7K EIA0805 1% || [http://www.digikey.com/scripts/DkSearch/dksus.dll?PName?Name=RHM2.7kCCT-ND DIG] || 0.037|| 2k to 3k resistor is fine
 
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| 2 || DL1,DL2 || P503-ND || red gull wing SMT 4.2mm LED || [http://www.digikey.com/scripts/DkSearch/dksus.dll?PName?Name=P503-ND DIG] || ? || P514-ND (green) for bridge board
+
| 2 || DL1,DL2 || P503CT-ND || red gull wing SMT 4.2mm LED || [http://www.digikey.com/scripts/DkSearch/dksus.dll?PName?Name=P503CT-ND DIG] || 0.33 || P514-ND (green) for bridge board
 
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| 1 || SH1 || P0.0ACT-ND || 0.0 ohm || [http://www.digikey.com/scripts/DkSearch/dksus.dll?PName?Name=P0.0ACT-ND DIG] || ? || GND to COM solder bead?
+
| 1 || SH1 || P0.0ACT-ND || 0.0 ohm || [http://www.digikey.com/scripts/DkSearch/dksus.dll?PName?Name=P0.0ACT-ND DIG] || 0.077 || GND to COM solder bead?
 
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| 2 || RN1, RN2 || RHM15.0FCT-ND || 15ohm EIA1206 1/4W || [http://www.digikey.com/scripts/DkSearch/dksus.dll?PName?Name=RHM15.0FCT-ND DIG]  || ? || requires < 20 ohm - reduces inrush current when board first powered and limited total current
+
| 2 || RN1, RN2 || RHM15.0FCT-ND || 15ohm EIA1206 1/4W || [http://www.digikey.com/scripts/DkSearch/dksus.dll?PName?Name=RHM15.0FCT-ND DIG]  || 0.047 || requires < 20 ohm - reduces inrush current when board first powered and limited total current
 
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Latest revision as of 23:39, 23 June 2005

POT4 Bill of Materials


POT4 (REV-0)
NUM REFDES Part# Desc Source Price Notes
1 PC1 WM4203-ND 5 pin, 0.1" molex header DIG 0.59 mates with : WM2014-ND and requires pins WM2312-ND or WM1114-ND
1 CC3 PCC1828CT-ND 0.1u, 25V X7R EIA0805 multilayer ceramic DIG 0.062 optional - provides LP input filter (ideally use a good cap here)
1 CC3 RHM1.00MCCT-ND 1 meg EIA0805 DIG 0.038 optional - stack over CC3 to provide 0 input for no input connection
2 RC1,RC2 P0.0ACT-ND 0.0 ohm EIA0805 DIG 0.077 short inputs
4 CC1,2,4,5 not populated place 0.1u caps here for additional LP input filtering
1 JC1 P15.0HCT 15 ohm EIA0605 DIG 0.09 3 way solder bead jumper - solder R between COM and SHIELD option
1 RA1 331-499FCT-ND (gain=100), open (gain=1) EIA1206 resistor to set gain DIG 0.088 for INA128 gain = 1+50K/RA1
1 UA1 INA128UA Instrumentation Amp SO8 package DIG 5.80 ALT : many - LT1167, INA122 (Vsup > 32) gain equation may be different
1 RO1 3266W-103-ND(POT), 3266W-503ND(bridge) (burns3266w) multiturn trim pot DIG $3.58 10K for POT, 50K for bridge
1 U1 296-1390-5-ND LM324 quad opamp SO14 (narrow) package DIG 0.45 ALTs : quad opamp (Vsup > 32)
1 JF1 S1012-36-ND (populates 9) 36 pin 0.1" header pins (4 needed from strip) DIG 1.03/9 this part is 36 pins, 4 pins are needed to make a 3way jumper
1 JF1 S9000-ND 0.1" shorting jumper DIG 0.093 used to select amplifer filter path
1st LP filter
2 RF1,RF2 RHM13.3KCCT-ND 13.3K 1% EIA0805 DIG 0.038
1 RF3 RHM6.65KCCT-ND 6.65K 1% EIA0805 DIG 0.038
1 CF1 490-1635-1-ND 5.1nF EIA0805 DIG 0.27
1 CF2 490-1644-1-ND 22nF EIA0805 DIG 0.457
2nd LP filter
1 CF3 490-1632-1-ND 3.3nF EIA0805 DIG 0.205
1 CF4 490-1644-1-ND 22nF EIA0805 DIG 0.457
2 RF4,RF5 RHM6.65KCCT-ND 6.65K 1% EIA0805 DIG 0.038
BW limited derivative
1 RD1 311-4.99MCCT-ND 4.99M 1% EIA0805 DIG 0.08
1 RD2 RHM3.00KCCT-ND 3.0K 1% EIA0805 DIG 0.038
1 CD1 PCC101CGCT-ND 100pF EIA0805 DIG 0.049
1 CD2 490-1673-1-ND 0.1u EIA0805 25V X7R DIG 0.132 larger value will improved low frequency performance
differential position output
2 RB1,RB2 P0.0ACT-ND 0.0 ohm EIA0805 DIG 0.077 increase R for output RC filter by adding matched precision resistors here. Driver output is already 50 ohm.
1 CB1 PCC1864CT-ND 0.1uF 50V EIA0805 Y5V DIG 0.072 use 25V or larger bipolar precision cap here to increase C in output RC filter. Total C is CB1 + CB2
1 CB2 495-1087-ND 1uF, 50V (bipolar) metalized poly cap DIG 0.41 output RC filter is CB1 + CB2
1 UB1 DRV135UA-ND differential driver in SO8 package DIG 4.39
1 PN1 WM4203-ND 0.1" 5pin molex header DIG 0.59 mates with : WM2014-ND and requires pins WM2312-ND or WM1114-ND
differential velocity output
2 RB3, RB4 P0.0ACT-ND 0.0 ohm DIG 0.077 see notes for RB1,RB2
1 CB3 PCC1864CT-ND 0.1uF 50V EIA0805 Y5V DIG 0.072
1 CB4 495-1087-ND 1uF, 50V (bipolar) metalized poly cap DIG 0.41 output RC filter is CB3 + CB4
1 UB2 DRV135UA-ND differential driver in SO8 package DIG 4.39
1 PN2 WM4200-ND 0.1" 2pin molex header DIG 0.34 mates with : WM2011-ND and requires pins WM2312-ND or WM1114-ND
precision (adjustable) voltage reference
4 RR1, RR4 RHM1.60KCCT-ND 1.60K 1/8watt EIA0805 DIG 0.038 pair of resistors stacked to increase power to 1/4watt
1 RR2 RHM7.32KCCT-ND 7.32K 1% EIA0805 DIG 0.038
1 RR3 RHM2.49KCCT-ND 2.49K 1% EIA0805 DIG 0.038
1 UR1 296-10129-1-ND TL1431CD adjustable voltage reference in SO8 package DIG 0.72
1 CR1 493-2374-1-ND 6.8V, 16V tant (size A / 3216) DIG 0.209 > 6.8uF to avoid reference instability
power section
2 CE1,CE3 493-2365-1-ND 10uF 16V tant (Size A / 3216) DIG 0.26 require : C>1.0uF, V>=16V size A tant
2 CE2, CE4 PCC1853CT-ND 0.1uF EIA0805 25V Y5V DIG 0.052 require : 0.1u chip cap
2 RL1,RL2 RHM2.70kcCT-ND 2.7K EIA0805 1% DIG 0.037 2k to 3k resistor is fine
2 DL1,DL2 P503CT-ND red gull wing SMT 4.2mm LED DIG 0.33 P514-ND (green) for bridge board
1 SH1 P0.0ACT-ND 0.0 ohm DIG 0.077 GND to COM solder bead?
2 RN1, RN2 RHM15.0FCT-ND 15ohm EIA1206 1/4W DIG 0.047 requires < 20 ohm - reduces inrush current when board first powered and limited total current
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