POT4b BOM
From DIDEAS Wiki
POT4b Bill of Materials
Please see POT4a bill of materials and make the following changes :
As desired populate all sections except that entitled "reference" ie don't populate RR1-RR4, UR1, CR1
For the reference section populate:
| NUM | REFDES | Part# | Desc | Source | Price | Notes | ||
|---|---|---|---|---|---|---|---|---|
| 1 | UR1 | MAX6173AASA | 2.5V voltage reference | Maxim | 6.64 | 2.5V, 5V, or 10V reference depending on application | ||
| 1 | CR1 | PCC1853CT-ND | 0.1uF EIA0805 25V Y5V | DIG | 0.052 | require : 0.1u chip cap | ||
| 1 | DR1 | BZT52C2V4-7-FDICT-ND | 2.4V zener diode SOD-123 | DIG | 0.43 | zener voltage should be appx 1/2 of the reference voltage | ||
| 1 | RR2 | RHM10.0KCCT-ND | 10k EIA0805 | DIG | 0.038 | |||
| 1 | DL1, DL2 | P514CT-ND | green gull wing SMT 4.2mm LED | DIG | 0.038 | |||
| 1 | UA1 | INA122UA | Instrumentation Amp SO8 package G = 5+200K/R | DIG | 5.80 | INA122 is good for gain to 10k - but has a Ft of around 200KHz. ALT : many - LT1167, INA128UA (Vsup > 32) gain equation may be different | ||
| 1 | RA1 | RHM402FCT-ND (gain=502.5), open (gain=1) | 402 ohm, EIA1206 resistor to set gain for INA122 | DIG | 0.047 | for INA122 gain = 5+200K/(RA1 | (RA2+RA3)) | |
| 1 | UA1 | INA128UA | Instrumentation Amp SO8 package G = 1 + 50K/5 | DIG | 5.80 | ALT : many - LT1167, INA122UA (Vsup > 32) gain equation may be different | ||
| 1 | RA1 | RHM100FCT-ND (gain=501), open (gain=1) | 100 ohm, EIA1206 resistor to set gain for INA122 | DIG | 0.047 | for INA128 gain = 1+50K/(RA1 | (RA2+RA3)) |
UR1
