4 x D/A - Electronic Circuits Projects Diagrams Free

L0D|Mr_B · 14th November 2003, 01:45 PM

ne1 know of a microcontroller (pref PIC or something easy to program) with 4 x D/A output? i know it's a tall order, but i cant find anything :shock:

B

L0D|Mr_B · 14th November 2003, 05:07 PM

failing the above, anyone know of an analog "latch", like a dtype flip flop but remembers analog signals?

B

Exo · 14th November 2003, 06:42 PM

I would just try to find some external D/A's .... With a serial bus connection to save µC pins

bmcculla · 15th November 2003, 01:55 AM

If your outputs are fairly low frequency you can use a PWM output with a RC lowpass filter as a DtoA. Just set the cutoff point on the filter to filter out all the PWM frequency. A micro with 4 PWM outputs isn't that hard to find.

The analog latch you are talking about is called a "sample and hold" circuit. It shouldn't be too hard to make one with an op amp.

Brent

panic mode · 15th November 2003, 12:25 PM

Check the AD396 (quad 14-bit latched D/A converter).
http://www.analog.com/UploadedFiles/...152AD396_0.pdf

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14th November 2003, 01:45 PM	#1
L0D\|Mr_B	4 x D/A ne1 know of a microcontroller (pref PIC or something easy to program) with 4 x D/A output? i know it's a tall order, but i cant find anything :shock: B __________________ Remember there are 3 types of people in this world - there are those who can count, and there are those who cant ....

14th November 2003, 05:07 PM	#2
L0D\|Mr_B	failing the above, anyone know of an analog "latch", like a dtype flip flop but remembers analog signals? B __________________ Remember there are 3 types of people in this world - there are those who can count, and there are those who cant ....

14th November 2003, 06:42 PM	#3
Exo	I would just try to find some external D/A's .... With a serial bus connection to save µC pins

15th November 2003, 01:55 AM	#4
bmcculla	If your outputs are fairly low frequency you can use a PWM output with a RC lowpass filter as a DtoA. Just set the cutoff point on the filter to filter out all the PWM frequency. A micro with 4 PWM outputs isn't that hard to find. The analog latch you are talking about is called a "sample and hold" circuit. It shouldn't be too hard to make one with an op amp. Brent

15th November 2003, 12:25 PM	#5
panic mode	Check the AD396 (quad 14-bit latched D/A converter). http://www.analog.com/UploadedFiles/...152AD396_0.pdf