Universal OPAMP Board for SMD SOT23-5 Package

Rajkumar Sharma
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easy
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SKU: EL112519
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This is easy to build and very useful project for hobbyists and students to learn and create OPAMP-based projects. The project accommodates a single OPAMP in the SOT23-5 package. The project provides the user with multiple choices and extensive flexibility for different applications circuits and configurations. It provides the user with many combinations for various circuit types including active filters, differential amplifiers, and external frequency compensation circuits etc. A few examples of application circuits are given below. LM321 op-amp is the right choice to use for this board or any SOT23-5 OPAMP with the same pin configuration as LM321 can be used. It supports dual supply or single supply, Jumper J1 is provided to use this board with a single supply, D1 power LED.

Note: Refer to example circuit to test the board, it is a bistable multivibrator, with single supply Jumper J1 closed.

Credits: All example schematics are from Analog Devices application notes.

Features

Single or Dual Supply User-defined (Jumper)
4 Pin Male Header Connector for inputs
3 Pin Male Header for Supply input (Single or Dual)
Jumper J1 Close for single Supply, Open for Dual Supply
LED D1 Power LED
Any SOT23-5 Op-Amp Can be used Pin configuration – LM321
PCB Dimensions 37.31 x 23.50 mm

Similar Universal OPAMP boards

Schematic

Example Application

Parts List

NO.	QNTY	REF.	DESC
1	1	CN1	4 PIN MALE HEADER PITCH 2.54MM
2	1	CN2	2 PIN MALE HEADER PITCH 2.54MM
3	1	CN3	3 PIN MALE HEADER PITCH 2.54MM
4	26	R1,C1,R2,C2,R3,C3	USER DEFINED
		R4,C4,C5,R6,C6,R7	USER DEFINED
		R8,C8,R9,R10,R11,R12	USER DEFINED
		R13,C13,R14,R15,R16,R18	USER DEFINED
		R5,C7,C14,R19	USER DEFINED
5	2	C9,C11	CAPACITOR SMD SIZE 1206
6	2	C10,C12	CAPACITOR SMD SIZE 0805
7	1	D1	LED RED SMD SIZE 0805
8	1	J1	PCB SOLDER JUMPER
9	1	R17	ALL RESISTORS SIZE 0805
10	1	U1	OP-AMP SOT23-5 (LM321)
ALL RESISTORS	SMD SIZE 0805	OPAMP DIGIKEY#	LM321MFX/NOPBCT-ND

Example Application Parts List

NO.	QNTY.	REF.	DESC.	MANUFACTURER	SUPPLIER	SUPPLIER PART NO
1	1	CN2	2 PIN MALE HEADER PITCH 2.54MM	WURTH	DIGIKEY	732-5315-ND
2	1	CN3	3 PIN MALE HEADER PITCH 2.54MM	WURTH	DIGIKEY	732-5316-ND
3	1	C6	1K PF /50V SMD SIZE 0805	MURATA/YAGEO
4	1	C9	10uF/25V SMD SIZE 1206	MURATA/YAGEO
5	1	C10	0.1uF/50V SMD SIZE 0805	MURATA/YAGEO
6	1	D1	LED RED SMD SIZE 0805	OSRAM	DIGIKEY	475-1278-1-ND
7	1	J1	CLOSED(PCB JUMPER)			PCB SOLDER JUMPER
8	4	R1,R3,R7,R16	100K 5% SMD SIZE 0805	MURATA/YAGEO
9	2	R8,R9	0E SMD SIZE 0805	MURATA/YAGEO
10	1	R17	1K 5% SMD SIZE 0805	MURATA/YAGEO
11	1	U1	LM321	TI	DIGIKEY	LM321MFX/NOPBCT-ND