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ADC081S021: Equivalent ADC for a pro audio device.

Part Number: ADC081S021

Hello Guys,

Good day.

Our customer is considering to use ADC081S021 but it requires a microcontroller interface to control CSnot. Is there something of an alternative that willcontinuously put out 8-bit words for the 0 to Vdd input voltage as it varies, without any uC control. In other words it has to sample the input, shoot out an 8-bit word over SPI and then sample the input again. Over and over until it powers down.

Single supply: Vdd = 4.5 to 5.5v, Fs = 50kHz minimum -> 1Mhz max, 8-bit words will go to a Microchip MCP41XXX to continuously vary the digital resistor.

Thanks and regards,


  • Hi Art,

    I'm not aware of any devices in our portfolio that can generate an internal clock and self start a conversion.  The ADC081S021 needs both a clock source as well as a /CS input.  Maybe you could use a simple 555 timer and a ripple counter to achieve this operation without the intervention of a micro.