Q 

Can AD2S1200 be used with "SINCOS" sensor?

A 

Yes, if by "SINCOS" sensor you mean a Resolver (resolver is like a
motor/generator with windings at 90 degrees so it gives Sin/Cos outputs).
The converter accepts 3.6Vp-p ±10% input…

Q 

In case of LOS, is pulling -RESET low for duration Ttrack enough or must the
part, pulling reset low, be fully powered off then on?
In brief is reset enough or do we need to cycle power?

Should the resolver wires be disconnected from AD2S1200,…

Q 

If the motor is running under a slow speed for example 0.5 rps, is the 0.488rps
LSB a little bit small? Is there any way to improve it? 

A 

If the customer is using the velocity output as feedback to drive them motor
and If that motor is always…

Q 

AD2S1200: Is there any problem with setting a lower value to R11 and R17? Is
there a minimum value from the point of view of the AD2S1200?

A 

The 10K resistors R11 and R17 have no impact on the AD2S1200 operation. You can
set them lower if you wish…

Q 

I have a question about AD2S1200 sin/cos input. The datasheet says that,
voltage swing is 3.6Vpp typically, but the common mode volts is 100mV, respect
to Refout. Does it mean the common mode voltage should be Refout+/-0.1V?

But I also find…

Q 

When accessing the velocity information. ie /RDVEL pin is low. What are the
units that the velocity is measured in? And what are the limits that the device
can read?

A 

The digital velocity output of the AD2S1200 represents the velocity of the

Q 

In data Sheet it states only: "POWER SUPPLY IDD Dynamic 18 mA", but for the
power budget I need to know the worst case. Can you provide separate values for
AVDD and DVDD (both 5V). The Load on EXC/bEXC is around 5k
each.

A 

IDVDD and…

FAQ

Q 

How are angular accuracy and resolution linked and why does a 12 bit resolver
to digital have 10.6 arcmin instead of 5.3 arcmin?

A 

There are 21600 (360*60) arc min in 1 revolution. In 12 bit system there are
4096 codes. I LSB = 21600/4096 = 5.3…

Q 

The signal bit (DB0) at pin 20 is toggling, when the /RDVEL is high (at the
same time sample by the signal /RD), while the resolver is rotating, and stays
at the last position when the resolver is stopped rotating.

But the same pin 20 (DB0) is…