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Converters: Analog
to Digital (A / D) Circuits Page 1a Analog to Digital: #'s AB-DE-GH-JL-M
N-QR-S T-Z Last Updated on:
Monday, October 03, 2011 06:08 PM
Links to electronic circuits, electronic schematics, designs for engineers,
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2 ADC channels double sensor precision - 03/18/99 Issue of
EDN The accuracy of the on-chip ADCs of numerous small and
inexpensive 8-bit µPs is well-suited for many applications. However,
some situations benefit from just a little more accuracy from a
resistive position sensor, for example. The resistive circuit in
Figure 1 uses two ADC pins....Page includes several designs.
Scroll to find this one.... [Design Idea by Luke J Barker, Reinke
Manufacturing Co Inc, Deshler, NE]
2 wires control SPI high-speed ADC - 10-Nov-05 Issue of EDN
Inverters substitute for an SPI ADC's chip-select line.... [Design
Idea by Dan Meeks, Texas Instruments Inc, Austin, TX; Edited by Brad
Thompson and Fran Granville]
2-Channel ADC Tags Its Own Output - 04/28/94 EDN-Design Ideas
Transferring converted data from high-speed DACs directly to system RAM to avoid
�P bottlenecks is common. But, if the ADC serves more than one input, the
µP obviously won't be able to select channels during the DMA period. The
circuit in Fig 1 shows a simple way to operate a 1-MHz, 12-bit ADC (IC1) in DMA
mode.... [Design Idea by Fred Hamilton, National Semiconductor, Santa Clara, CA]
4 Bit µP's A/D Converter Decodes Keypad's Inputs - 10/13/94 EDN-Design
Ideas Fig 1 shows a Mitsubishi M50927-XXXSP/FP 4-bit microcontroller
decoding a 4×4 keypad using only four digital I/O lines instead of eight. Saving
four of a 4-bit µC's precious I/O lines couild be significant. 4-bit µC's
ADC provides key to savings. µC's output lines, F1 through F4,
energize keypad's column lines one at a time via 74HC4049
buffer/driver....[Design Idea added 6/06] [Design Idea by Ryoden International
(Shanghai) Ltd, Shanghai, China]
4-channel 8-bit analog-to-Digital converter for PC - This is an
extremely simple ADC for the PC. It connects to the parallel printer port,
and runs from a 9V battery. All parts are available from Digi-Key….(circuit
added 05/05)
50 Hz/60Hz Rejection on Sigma-Delta ADCs - AN-611 Analog Devices
Application Notes (app note added 2/06) Rejection of 50 Hz and 60 Hz
interference is a requirement in many industrial settings. This Application
Note outlines how AD7708/AD7718,AD7709,AD7719, AD7782/AD7783 Sigma-Delta
ADCs are used for optimal rejection of se frequencies.
555 Timer as an A/D Converter - Measure voltages accurately with a
microcontroller using this simple circuit. Includes sample program for
Parallax Basic Stamp (added 7/03)
