Full Wave Rectifier Using Single Supply OPAMP

  • Rajkumar Sharma
  • 25 Views
  • easy
  • Tested

This is a Full wave rectifier project built using MAX44267 dual OPAMP which provides true zero output with a single supply. The circuit converts Bipolar/AC input into full-wave output. CN1 is provided for sinewave input, CN2 helps to connect the power and output. Operating supply 15V DC, D1 power LED.

The MAX44267 precision, low-noise, low-drift dual operational amplifier offers true-zero output that allows the output to cross zero maximizing the dynamic range of an ADC and increasing resolution. In addition, the input common-mode range extends from +13.5V down to -12V. The MAX44267 integrates charge-pump circuitry that generates the negative voltage rail in conjunction with external capacitors. This allows the amplifier to operate from a single +4.5V to +15V power supply, but it is as effective as a normal dual-rail ±4.5V to ±15V amplifier. The architecture eliminates the need for a negative power-supply rail, saving system cost and size. The MAX44267 is unity-gain stable with a gain-bandwidth product of 5MHz. The device features low offset voltage of 50μV (max), drift of 0.4µV/°C (max), and 200nVP-P noise from 0.1Hz to 10Hz. The low offset and noise specifications and wide input common-mode range make the device ideal for sensor transmitters and interfaces.  Varying the external charge pump capacitors enables the charge-pump noise to be minimized.

Features

  • Operating power Supply 15V DC @ 10mA
  • Input Signal 100mV to 4V Peak to Peak
  • Input Frequency Response 1Hz to 10Khz
  • 2Khz Full wave output from 1Khz Sinewave
  • CN1 2.54MM Male Header Connector for Input Signal
  • D1 Power LED
  • CN2 Signal Output and Power Input
  • PCB Dimensions 30.64MM X 19.69MM

Schematic

Parts List

NO.QNTY.REF.DESC.MANUFACTURERSUPPLIERPART NO
11CN12 PIN MALE HEADER PITCH 2.54MMWURTHDIGIKEY
21CN24 PIN MALE HEADER PITCH 2.54MMWURTHDIGIKEY732-5317-ND
32C1,C310uF/25V SIZE 1206MURATA/YAGEODIGIKEY732-5315-ND
44C2,C4,C5,C60.1uF/50V SMD SIZE 0805MURATA/YAGEODIGIKEY
51C715PF/50V SMD SIZE 0805MURATA/YAGEODIGIKEY
61C80.022UF/25V SMD SIZE 0805MURATA/YAGEODIGIKEY
71D1LED SMD SIZE 0805OSRAMDIGIKEY475-1278-1-ND
81D21N4148 SMDMICROCHIPDIGIKEY494-JAN1N4148UR-1
91L1F-BID 80 Ohms/100MhzTDKDIGIKEY445-2187-1-ND
101R12.2K 5% SMD SIZE 0805MURATA/YAGEODIGIKEY
111R220K 1% SMD SIZE 0805MURATA/YAGEODIGIKEY
121R310K 1% SMD SIZE 0805MURATA/YAGEODIGIKEY
131R460.4K 1% SMD SIZE 0805MURATA/YAGEODIGIKEY
141R530.1K 1% SMD SIZE 0805MURATA/YAGEODIGIKEY
151U1MAX44267MAXIMMOUSER700-MAX44267AUD+

Connections



Gerber View

Photos

Video

MAX44267 Datasheet

MAX44267-535620

PCB

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