Full Wave Rectifier Using Single Supply OPAMP

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 2.54 mm Male Header Connector for Input Signal
• D1 Power LED
• CN2 Signal Output and Power Input
• PCB Dimensions 30.64 x 19.69 mm

Schematic

Parts List

Connections

Waveforms

Gerber View

Photos

Video

MAX44267 Datasheet

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