I'm working on AD7606 IC.
I would like to know how to use single channel data out with 8ch simultaneous sampling.
what do I have to do?
consider DoutA is the Communication channel for SPI.
Are you just asking for the way the AD7606 itself should be configured to allow the 8 channels to be ready serially on DOUTA?
If that is the case, here is what you have to do:
Pin 6, /PAR/SER/BYTE SEL : Set this pin high to select serial interface.
Pin 9, 10: These pins initiate conversions and should be connected to your processor. Short these pins together to enable simultaneous sampling on all of the 8 channels
Pin 12, RD/SCLK: This pin acts as the SCLK input in serial mode
Pin 13, CS: This frames the serial read transfer
Pin 14, BUSY: Indicates to the processor that the conversions are complete.
Pins 16 to 22, DB[6:0] : Tie these pins to ground when in seial mode
Pin 24, DB7/DOUTA: This pin functions as DOUTA in serial mode
Pins, 27 to 33, DB[15:9]: Tie these pins to ground when in seial mode
There are other pins that need to be set up but these don't relate to the interface mode so I did not include the information here.
The information on page 27, 28 of the datasheet under the heading "Serial Interface" details how you interface with the part.
Thank you for your answer.
I though there was some special configuration for single wire Data transfer, which is using DoutA only for 8 Ch.
But I guess there is no special connections for it, but just to leave Dout B open.
I have already read about shorting convstA & B in order to make a 8ch simultaneous samplings.
anyway your answer helped to make certain of my assumption.
This is very interesting, I have a very similar question regarding the AD7606-4 in PARALLEL BYTE mode in http://ez.analog.com/message/36411 regarding the termination of an unused "Parallel Output Data Bit8 (DB8)/Serial Interface Data Output Pin (DoutB)" and it seems as if nobody at Analog Devices will actually confirm or deny it leaving this pin floating in the breeze is an acceptable thing to do with it. This kind of goes against everything I was taught in school. I think at this point someone at Analog Devices should request a revision to the data sheet and have a sentence added to the Pin No.25 Description field on page 15 of 36. which states "If you are using mode XXX or YYY then do not connect anything to PIN 25 and just let it float in the breeze" Because we are not going to escalate the lack of information issue and actually let you, our customer, know what is going on with the silicon behind that pin in the mode you want to use.
I should get 4 points for just answering my own technical question. jus sayin
Hi Dave, Apologies for the delay on this. I wanted to confirm connections with the design team before posting you a reply. Once i have confirmation i will let you know. Again sorry for the delay.
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