POT2b BOM
From DIDEAS Wiki
POT2b Bill of Materials
| NUM | REFDES | Part# | Desc | Source | Price | Notes |
|---|---|---|---|---|---|---|
| 1 | P1 | WM4201-ND | 3 pin, 0.1" molex header | DIG | 0.43 | mates with : WM2012-ND and requires pins WM2312-ND or WM1114-ND |
| 1 | RO1 | 3266W-103-ND | 10K 1/4" Sq cerm SL MT trimpot | DIG | 3.58 | ALT: 3266W-xxx-ND |
| 1 | CO1 | PCC1828CT-ND | 0.1u, 25V X7R EIA0805 multilayer ceramic | DIG | 0.062 | optional - provides LP input filter (ideally use a good cap here) |
| 1 | CO1 | RHM1.00MCCT-ND | 1 meg EIA0805 | DIG | 0.038 | optional - stack over CC3 to provide 0 input for no input connection |
| 1 | UA1 | INA128UA-ND | Instrumentation amp, BurrBrown SOIC8 | DIG | 5.80 | gain = 1+50K/RA1 |
| 1 | RA1 | open (gain=1) | RES 1% EIA0805 | xx | gain=1+50K/RA1 | |
| 1 | UB1 | DRV135UA-ND | differential driver SOIC8 | DIG | 4.39 | |
| 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 | P2 | WM4203-ND | 5-pin 0.1" molex | DIG | 0.59 | mates with WM2014-ND and requires pins WM2312-ND or WM1114-ND |
| 2 | RR1,RR4 | RHM750CCT-ND | 750 ohm 1% 0805 resistor | DIG | 0.038 | NOTE : Adjust value to provide at least 3ma over total reference current, may have been populated 510 ohm |
| 1 | RR2 | RHM7.32KCCT-ND | 7.32k EIA0805 1% | DIG | 0.038 | Vref = 0.8495 = 2.5V + 2.5*RR2/RR3 |
| 1 | RR3 | RHM2.49KCCT-ND | 2.49k EIA0805 1% | DIG | 0.038 | |
| 1 | UR1 | 296-10129-1-ND | TL1431 precision adjustable shunt reference in SOIC8 | DIG | 0.72 | |
| 1 | CR1 | 399-1563-1-ND | 10uF, 10V tant 3216 | DIG | 0.22 | NOTE : >6uF for reference stability, >Vref for cap protection |
| 2 | RL1, RL2 | RHM2.49KCCT-ND | 2.49k EIA0805 | DIG | 0.038 | ALT : value between 2k, 3k |
| 2 | DL1,DL2 | P503CT-ND | gull wing SMT red LED | DIG | 0.33 | |
| 2 | CD1,CD3 | 399-3098-1-ND | 10u, 16V tant size-A (3216) | DIG | 0.24 | ALT : 493-2374-1-ND, C>=1.0u, V>=16V |
| 2 | CD2,CD4 | PCC1828CT-ND | 0.1u, 25V X7R EIA0805 multilayer ceramic | DIG | 0.062 | ALT : multilayer ceramic C>0.047u, C<0.22u |
| 1 | SH1 | P0.0ACT-ND | 0.0 ohm | DIG | 0.077 | GND to COM short, a small value resistor (<10ohm) is ok too |
