Precision Full-Wave Rectifier – Dual-Supply

Rajkumar Sharma
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SKU: EL113776
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This is a dual-supply precision full-wave rectifier board that can turn alternating current (AC) signals into single polarity signals. The OPAMPs, U1A, and U1B, buffer the input signal and compensate for the voltage drops across D1 and D2 allowing for small signal inputs. This implementation functions with limited distortion for 20V_pp input signals at frequencies up to 50 kHz and for signals as small as 50 mV_pp at frequencies up to 1kHz. The circuit can be used in applications that need to quantify the absolute value of input signals which have both positive and negative polarities.

Connections

Connector CN1: DC Supply Input +/-15V DC
Connector CN2: AC Signal Input
CN3: Full-Wave Signal Output
Jumper J1: PCB Jumper Closed
Use PR1 if the input Signal Peak to Peak is more than 20V
For DC Voltage Output: Use C6=10uF/25V and R5=100K Size 0805 (Full-Wave AC to DC Voltage Output)

Features

Supply Voltage +/-15V DC
Input AC Signal +/-50mV To +/-10V
Output 50mV to 10V Full-Wave Rectified Output
Frequency Response 1Khz to 50Khz
PCB dimensions: 42.39 x 15.56 mm

Schematic

Parts List

NO.	QNTY.	REF.	DESC.	MANUFACTURER	SUPPLIER	SUPPLIER PART NO
1	1	CN1	3 PIN MALE HEADER PITCH 2.54MM	WURTH	DIGIKEY	732-5316-ND
2	1	CN2	4 PIN MALE HEADER PITCH 2.54MM	WURTH	DIGIKEY	732-5317-ND
3	1	CN3	2 PIN MALE HEADER PITCH 2.54MM	WURTH	DIGIKEY	732-5315-ND
4	2	C1,C3	10uF/25V SMD SIZE 1206 OR 1210	AVX	DIGIKEY	478-2363-1-ND
5	2	C2,C4	0.1uF/50V SMD SIZE 0805	MURATA/YAGEO	DIGIKEY
6	1	C5	47PF/50V SMD SIZE 0805	MURATA/YAGEO	DIGIKEY
7	3	PR1,R5,C6	DNP	OPTIONAL		DO NOT INSTALL
8	2	D1,D2	1N4148 SMD	NEXPERIA	DIGIKEY	1727-2967-1-ND
9	1	J1	CLOSED-SOLDER JUMPER
10	4	R1,R2,R3,R4	1K 5% SMD SIZE 0805	MURATA/YAGEO	DIGIKEY
11	1	R6	49.9E 1% SMD SIZE 0805	MURATA/YAGEO	DIGIKEY
12	1	U1	OPA2211	TI	DIGIKEY	296-24510-5-ND