R-2R Digital to Analog Converter with LM358 »
Posted By Wiparat 6 months, 1 week ago in Science & TechnologyUse this circuit as a low cost alternative to a commercial DAC. It is important that the latch be a CMOS device, so that the outputs drive to Vcc when they are high. (TTL devices only drive to 2.4 volts or so). I have shown the ‘ 573 latch rather than the ‘ 373 which can also be used. The ‘ 573 has the advantage of sequential pin-outs for the Q0 - Q7 pins, making it easier to connect in most circuit layouts.The LM358 OpAmp is a good choice for this circuit for two reasons: 1) It can be powered from the 5V supply. 2) Its output can go to 0V without a negative power supply. Note that the LM358 is a dual OpAmp, so the other half is unused in this circuit. Link
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