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Documents Direct interface for resolver with AD2S1210
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Direct interface for resolver with AD2S1210

Q 

My task is to design an interface for a resolver. My problem is that the
information in the datasheet does not clearly defines this. See AD2S1210-EP
table 1 for the sine,cosine inputs. There is an amplitude required of 2.3 till
4 Vpp. In case of a direct connection of the resolver windings  (see datasheet
AD2S1210 page 19) and the  electrical resolver representation on page 15, there
are voltages possible of approx. 0Vpp.(for example sine 0°, cosine 90°).
Could I use the RDC in this configuration or is a special  signal conditioning
necessary?
Another question to the accuracy: my requirement to the static accuracy shall
be less than  +/-0,008rad. Is this possible?

 

A 

There is no special circuitry required to interface between a resolver  and the
AD2S1210. The AD2S1210 is designed to be directly connectable to a  resolver.
Another way to read the  specification would be that the maximum input signal
amplitude should be within  the 2.3 V to 4.0V range. At 0'degrees  sine is 0 V,
this is ok as long as when sine is at its maximum, @90'Degrees,  that the peak
to peak amplitude is within the 2.3V to 4.0V  range.

Accuracy of +/-0.008rad is  +/-27.5 arc minutes. The AD2S1210-EP data  sheet
list a worst case accuracy of +/-7 + 1LSB arc minutes.

For the respective resolutions this equates to the  following : see table.gif
(attached).

The requirement of +/-0.008 rad is achieved for the AD2S1210-EP at 12-bit and
greater resolution.

Attachments:
Tags: ad2s1210
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Related Content
  • Direct interface for resolver with AD2S1210
    MSDAPI
    Question My task is to design an interface for a resolver. My problem is that the information in the datasheet does not clearly defines this. See AD2S1210-EP table 1 for the sine,cosine inputs. There...
  • RE: AD2S1210 NOISE
    jcolao
    Hi omid1360, The AD2S1210 provides the reference sine signal going to the resolver. The resolver then outputs the sine and cosine signal. If it is OK to share to us your diagram or schematic so we can...
  • Extended temp OPAMP to be use with AD2S1210-EP
    BestUser
    HI, since the AD2S1210 exist also in the extended (-55°C) version, AD2S1210-EP, which opamp with the same temp. ratings could be used to drive the EXC signals to the resolver unit? Thanks
 
Related Content
  • Direct interface for resolver with AD2S1210
    MSDAPI
    Question My task is to design an interface for a resolver. My problem is that the information in the datasheet does not clearly defines this. See AD2S1210-EP table 1 for the sine,cosine inputs. There...
  • RE: AD2S1210 NOISE
    jcolao
    Hi omid1360, The AD2S1210 provides the reference sine signal going to the resolver. The resolver then outputs the sine and cosine signal. If it is OK to share to us your diagram or schematic so we can...
  • Extended temp OPAMP to be use with AD2S1210-EP
    BestUser
    HI, since the AD2S1210 exist also in the extended (-55°C) version, AD2S1210-EP, which opamp with the same temp. ratings could be used to drive the EXC signals to the resolver unit? Thanks
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