POT2 BOM

POT2 Bill of Materials

• WIKI TABLE HELP

POT2 (REV-0) 020505

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
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		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	5.80	gain = 1+50K/RA1
1	RA1	open (gain=1)	RES 1% EIA0805		xx	gain=1+50K/RA1
1	RA2	NA	do not populate		xx	Note : was part of RC filter, but DRV135 input impeedance is "small"
1	CA1	NA	do not populate		xx	Note : was part of RC filter, but without R, INA128 can't drive C
1	UB1	DRV135UA-ND	differential driver SOIC8	DIG	4.39
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	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	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	RHM1.00KCCT-ND	1k EIA0805	DIG	0.038	NOTE : value depends on reference voltage, RLx = 0.5 * (Vref-4V) / 3mA
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