AD2S80_RESET signal and sample rate

Q Two questions need your help. 1. In the 11th page of the datasheet, it says:"During the reset period the input continues to be integrated, the reset period is constant at 400 ns." I am not sure what the meaning is, because AD2S80 does not have a RESET Pin? 2. For AD2S80, how much time it will spend to finish one conversion? ie: the sampling rate of AD2S80A. A This paragraph describes one of the internal signals of the AD2S80A device which has no effect on the system. I think this information is off use for a customer. As you know the AD2S80 device continuously track the input signals in order to find actual position and velocity information. Important parameter to understand how quick loop can find actual position is tracking rate which is user selectable. If you want to know how quick you can read the data output please take a look at page 9 of the datasheet which explains the Digital Timing of the AD2S80A converter. When you are reading the data from the part what you do is only latching the data from internal register and internal loop keeps tracking the inputs all the time.

AD2S80_arc min meaning

Q I want to know the meaning of "Accuracy 8 arc min" in the datasheet of AD2S80A. Does it means the error is 8 arc per minute? A The accuracy of an ADC is measured in terms of LSB. The accuracy of an RDC is measured in terms of Arc Minutes. This is standard for all resolver to digital converters. There are 60 arc minutes in one degree. There are 21,600 arc minutes in one full revolution i.e. 360 degrees x 60. A 10-bit lsb = 21.1 arc min A 12-bit lsb = 5.3 arc min A 10-bit lsb = 1.3 arc min A 10-bit lsb = 0.3 arc min The spec on the AD2S80A datasheet is 8 arc min +1LSB. So at 10 bit resolution, for example, this means that the max accuracy of the part is 29.1 arc min. If the resolution is 16 bit the max accuracy is 8.3 arc min.

AD2S80: Accuracy vs. temperature

Q What is the difference between the AD2S80ABD and the AD2S80ASD ? Is the ASD just more classified than the ABD according to accuracy/temperature? I mean, has the ASD and the ABD the same accuracy of 4 arcmin between -40?C and 85?C ? Or does the ASD type have a accuracy of 8arcmin over the whole range ? I will need a AD2S80 that has an accuracy of 4arcmin between -20?C and 75?C. A All the parts have been tested over the full temperature range. And the variation in accuracy is never bigger than 1 arc min. Therefore for a temp range between –20 and +75degC you have the BD (Industrial) and TD (military) with an accuracy of ±4 + 1 arc min (the +1 means that it can change until 1 arc min more over the range) and the UD (military) with an accuracy of ±2 + 1 arc min. The SD you mention has a ±8 + 1 arc min accuracy.

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AD2S80S Obsolete
The AD2S80A is a monolithic 10-, 12-, 14-, or 16-bit tracking resolver-to-digital converter. It is manufactured on a BiMOS II process that combines the...
AD2S80S on Analog.com

AD2S80A Not Recommended for New Designs
The AD2S80A is a monolithic 10-, 12-, 14-, or 16-bit tracking resolver-to-digital converter contained in a 40-lead DIP or 44- terminal LCC ceramic package...
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