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Electronics => Electronics => Topic started by: galannthegreat on February 12, 2012, 02:43:39 AM

Title: Quadrature Encoder Chip
Post by: galannthegreat on February 12, 2012, 02:43:39 AM

I am looking to see if there is a stand alone 2-channel quadrature encoder chip that interfaces with a serial protocol of some sort. If someone knows of a device or system of that nature I would be greatly appreciative.

Thanks.

Title: Re: Quadrature Encoder Chip
Post by: msprague on February 12, 2012, 08:08:31 AM

Here is one that has an SPI interface.
http://www.usdigital.com/products/interfaces/ics/lfls7366r-s (http://www.usdigital.com/products/interfaces/ics/lfls7366r-s)
You need one of these for each quadrature encoder.  There are alse quite a few 32-bit microcontrollers that can decode two quadrature encoders in hardware, for example the TI Stellaris ARM Cortex-M3 series.
Michael

Title: Re: Quadrature Encoder Chip
Post by: Soeren on February 12, 2012, 08:56:57 AM

Hi,

Quote from: galannthegreat on February 12, 2012, 02:43:39 AM

I am looking to see if there is a stand alone 2-channel quadrature encoder chip that interfaces with a serial protocol of some sort. If someone knows of a device or system of that nature I would be greatly appreciative.

If synchronous serial (i.e. clock and data) at logic level is OK, a cheap dual S-R flip-flop can be used.

Title: Re: Quadrature Encoder Chip
Post by: galannthegreat on February 13, 2012, 03:58:09 PM

Awesome, thanks for both of those suggestions. I will look at both and apply the one that works according to my circuit.