Amplifier -> A/D Converter -> BS2

simon2

Hello,
My ADC0831 is connected and I tested it, it works fine
My problem now is that I can't figure out a way to connect the ADC to this·amplifier (MC34071)
The amplifier has 4 outputs and I dont know which one to use
Thank you

Martin Hebel

What are you trying to accomplish? The op-amps only have one output per amp. Also, the Process Control text discusses using op-amps along with the ADC0831. If you are trying to amplify a smaller signal (how small?) to match 0 to 5V, you may not need to since the ADC0831 has the ability to offset and span an input by using Vref and Vin-, also discussed in Process Control.

http://www.parallax.com/detail.asp?product_id=122-28176

-Martin

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Martin Hebel
Personal Links with plenty of BASIC Stamp info
StampPlot - Graphical Data Acquisition and Control
AppBee - XBee ZigBee / IEEE 802.15.4 Adapters & Devices

simon2

it's a sequence of numbers coming from a magnetic head, amplified and I want to convert them to decimal and store them to the EEPROM
thank you

Martin Hebel

This is analog or digital data from the pickup? That is, are you reading an audio cassette or something digital? Do you know what range of voltages you are looking at amplifying? This may be fairly tricky... You won't be able to get anywhere near the sampling speed needed for audio ADC operations...

-MH

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Martin Hebel
Personal Links with plenty of BASIC Stamp info
StampPlot - Graphical Data Acquisition and Control
AppBee - XBee ZigBee / IEEE 802.15.4 Adapters & Devices

simon2

It's a magstripe reader and the amplifier is supposed to amplify the track and give me the sequence of numbers in analog