Difference between revisions of "POT4a BOM"
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|1 || PC2 || 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 | |1 || PC2 || 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 | ||
| + | Alternative - use 3 pin input WM4201-ND | ||
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| − | + | | 1 || CC1 || 490-1644-1-ND || 22nF EIA0805 || [http://www.digikey.com/scripts/DkSearch/dksus.dll?PName?Name=490-1644-1-ND DIG] || 0.457 || optional - provides LP input filter (ideally use a good cap here) | |
| − | |1 || CC1 || | ||
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| − | |1 || UA1 || INA128UA || Instrumentation Amp SO8 package || [http://www.digikey.com/scripts/DkSearch/dksus.dll?PName?Name=INA128UA DIG] || 5.80 || ALT : many - LT1167, INA122 (Vsup > 32) gain equation may be different | + | |1 || UA1 || INA128UA || Instrumentation Amp SO8 package || [http://www.digikey.com/scripts/DkSearch/dksus.dll?PName?Name=INA128UA-ND DIG] || 5.80 || ALT : many - LT1167, INA122 (Vsup > 32) gain equation may be different |
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| − | | 1 || CB1,CB2 || PCC2296CT-ND || 2.2uF, 25V X5R EIA1206 || [http://www.digikey.com/scripts/DkSearch/dksus.dll?PName?Name=PCC2296CT-ND DIG] || 0.389 || use 25V or larger bipolar precision cap here to increase C in output RC filter. Total C is CB1 + CB2 + CB3. ALT: PCC1883CT-ND=0.1u 25V X7R; | + | | 1 || CB1,CB2 || PCC2296CT-ND || 2.2uF, 25V X5R EIA1206 || [http://www.digikey.com/scripts/DkSearch/dksus.dll?PName?Name=PCC2296CT-ND DIG] || 0.389 || use 25V or larger bipolar precision cap here to increase C in output RC filter. Total C is CB1 + CB2 + CB3. ALT: PCC1883CT-ND=0.1u 25V X7R; PCC1893CT-ND=1u 25V X7R ; PCC2326CT-ND=10u 25V X5R |
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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 || | | 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] || 0.59 || mates with : WM2014-ND and requires pins WM2312-ND or WM1114-ND | | 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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| + | RHM604FCT-ND | ||
| + | |||
| + | | 1 || CB2 || RHM604FCT-ND || 604 ohm 1206 res || [http://www.digikey.com/scripts/DkSearch/dksus.dll?PName?Name=RHM604FCT-ND DIG] || 0.047 || this resistor terminates DRV135 to fix the gain at 2.00 (instead of 2.14) | ||
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| − | | | + | | (NP) || CB4,CB5 || PCC2296CT-ND || 2.2uF, 25V X5R EIA1206 || [http://www.digikey.com/scripts/DkSearch/dksus.dll?PName?Name=PCC2296CT-ND DIG] || 0.389 || use 25V or larger bipolar precision cap here to increase C in output RC filter. Total C is CB4 + CB5 + CB6. ALT: PCC1883CT-ND=0.1u 25V X7R; PCC1893CCT-ND=1u 25V X7R ; PCC2326CT-ND=10u 25V X5R |
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| 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 | | 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 | ||
| + | |- | ||
| + | |||
| + | | 1 || CB5 || RHM604FCT-ND || 604 ohm 1206 res || [http://www.digikey.com/scripts/DkSearch/dksus.dll?PName?Name=RHM604FCT-ND DIG] || 0.047 || this resistor terminates DRV135 to fix the gain at 2.00 (instead of 2.14) | ||
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| − | | 1 || CR1 || 493-2374-1-ND || 6. | + | | 1 || CR1 || 493-2374-1-ND || 6.8u, 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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Latest revision as of 12:51, 24 April 2006
POT4a Bill of Materials
Contents
Pot4a BOM
Pot4a can be built for a potentiometer input or a strain gauge bridge input. The differences between the two variation relate to the reference voltage and input amplifier gain. The bridge input generally is low impedance and thus needs to be driven with a lower voltage. The bridge signal amplitude is generally small and thus the amplifier gain is increased to 100 or 1000 V/V.
The board also consists of a number optional sub-circuits. The BOM has been divided into sections, however please review the schematic to verify that non-population of a section will result in the indented functionally.
Input Circuit
| NUM | REFDES | Part# | Desc | Source | Price | Notes | ||
|---|---|---|---|---|---|---|---|---|
| 1 | PC2 | WM4203-ND | 5 pin, 0.1" molex header | DIG | 0.59 | mates with : WM2014-ND and requires pins WM2312-ND or WM1114-ND
Alternative - use 3 pin input WM4201-ND | ||
| 1 | PC1 | 53047-0510 | 5 pin, 1.25mm header | Molex | ? | mates with commercial knee, 4 pin header PN:53047-0410 | ||
| 1 | CC1 | PCC1828CT-ND | 0.1u, 25V X7R EIA0805 multilayer ceramic | DIG | 0.062 | optional - provides LP input filter (ideally use a good cap here) | ||
| 1 | CC1 | 490-1644-1-ND | 22nF EIA0805 | DIG | 0.457 | optional - provides LP input filter (ideally use a good cap here) | ||
| 1 | RC1 | RHM1.00MCCT-ND | 1 meg EIA0805 | DIG | 0.038 | |||
| 1 | JC1 | P15.0HCT | 15 ohm EIA0605 | DIG | 0.09 | jumper to enable able COM driving the shield pin on PC2 | ||
| 1 | RA1 | RHM499FCT-ND (gain=100), open (gain=1) | 499 ohm, EIA1206 resistor to set gain | DIG | 0.047 | for INA128 gain = 1+50K/(RA1 | (RA2+RA3)) | |
| 1 | RA2 | RHM49.9CCT-ND | 50 ohm (G=1000) EIA0805 to set MAX adjustable gain | DIG | ? | for INA128 gain = 1+50K/RA1 | ||
| 1 | RA3 | 3266W-102ND(bridge) | (burns3266w) multiturn trim pot | DIG | $3.58 | open for POT (gain of 1), 1K for bridge? | ||
| 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) |
2nd order LP filter
| NUM | REFDES | Part# | Desc | Source | Price | Notes |
|---|---|---|---|---|---|---|
| 2 | RF1,RF2, RF4 | RHM13.3KCCT-ND | 13.3K 1% EIA0805 | DIG | 0.038 | |
| 1 | RF3 | open | 1% EIA0805 | DIG | ? | |
| 1 | CF1 | ?? 490-1642-1-ND | 10.0nF EIA0805 | DIG | should be 10.5nF | |
| 1 | CF2 | 490-1635-1-ND | 5.1nF EIA0805 | DIG | 0.27 | |
| 1 | JF1 | S1012-36-ND (populates 12) | 36 pin 0.1" header pins (3 needed from strip) | DIG | 1.03/9 | this part is 36 pins, 3 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 |
Position Intensity LED
| NUM | REFDES | Part# | Desc | Source | Price | Notes |
|---|---|---|---|---|---|---|
| 1 | RK1 | RHM100CCT-ND | 100 ohm EIA0805 | DIG | 0.093 | |
| 1 | RK2 | RHM1.00KCCT-nd | 1k, 1% EIA0805 | DIG | 0.093 | |
| 1 | CK1 | ? | 100pf EIA0805 | DIG | 0.093 | |
| 1 | DK1 | P507CT-ND | dual gull wing red/green LED | DIG | ? |
BW limited derivative
| NUM | REFDES | Part# | Desc | Source | Price | Notes |
|---|---|---|---|---|---|---|
| 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 EIA1206 25V X7R | DIG | 0.132 | PCC1893CT-ND (1.0uF) larger value will improve low frequency performance |
differential position output
| NUM | REFDES | Part# | Desc | Source | Price | Notes |
|---|---|---|---|---|---|---|
| 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,CB2 | PCC2296CT-ND | 2.2uF, 25V X5R EIA1206 | DIG | 0.389 | use 25V or larger bipolar precision cap here to increase C in output RC filter. Total C is CB1 + CB2 + CB3. ALT: PCC1883CT-ND=0.1u 25V X7R; PCC1893CT-ND=1u 25V X7R ; PCC2326CT-ND=10u 25V X5R |
| 1 | CB3 | 495-1087-ND | 1uF, 50V (bipolar) metalized poly cap | DIG | 0.41 | output RC filter is CB1 + CB2 + CB3 |
| 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 |
| 1 | CB2 | RHM604FCT-ND | 604 ohm 1206 res | DIG | 0.047 | this resistor terminates DRV135 to fix the gain at 2.00 (instead of 2.14) |
differential velocity output
| NUM | REFDES | Part# | Desc | Source | Price | Notes |
|---|---|---|---|---|---|---|
| 2 | RB3, RB4 | P0.0ACT-ND | 0.0 ohm | DIG | 0.077 | see notes for RB1,RB2 |
| (NP) | CB4,CB5 | PCC2296CT-ND | 2.2uF, 25V X5R EIA1206 | DIG | 0.389 | use 25V or larger bipolar precision cap here to increase C in output RC filter. Total C is CB4 + CB5 + CB6. ALT: PCC1883CT-ND=0.1u 25V X7R; PCC1893CCT-ND=1u 25V X7R ; PCC2326CT-ND=10u 25V X5R |
| 1 | CB6 | 495-1087-ND | 1uF, 50V (bipolar) metalized poly cap | DIG | 0.41 | output RC filter is CB4 + CB5 + CB6 |
| 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 |
| 1 | CB5 | RHM604FCT-ND | 604 ohm 1206 res | DIG | 0.047 | this resistor terminates DRV135 to fix the gain at 2.00 (instead of 2.14) |
reference precision (adjustable) voltage
| NUM | REFDES | Part# | Desc | Source | Price | Notes |
|---|---|---|---|---|---|---|
| 2 | RR1, RR4 | RHM787FCT-ND | 787ohm 1/4watt EIA1206 | DIG | 0.047 | |
| 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 | 6.8u, 16V tant (size A / 3216) | DIG | 0.209 | > 6.8uF to avoid reference instability |
power section
| NUM | REFDES | Part# | Desc | Source | Price | Notes |
|---|---|---|---|---|---|---|
| 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 5% | DIG | 0.038 | 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 |
