MC33030 and NJM2611 Servo Controller Input signals

[Terry]

I have been learning about servo motor controllers and have a question
on the input signals required for each of these IC's.

I just want to make sure I understand things correctly before I choose
which controller to go with. Please correct me if I am wrong.

It looks as if the MC33030 requires a constant voltage at the input
which determines the position of the servo. This voltage would need
to be generated by a PWM to voltage converter if driving the circuit
with a standard RC pulse signal. Datasheet can be found here:
http://www.onsemi.com/pub/Collateral/MC33030-D.PDF

On the other hand, the NJM2611 looks as if the input signal is just
the standard RC PWM signal. This chip must have an internal PWM to
voltage converter (linear one shot block?). Datasheet can be found
here: http://rocky.digikey.com/scripts/ProductInfo.dll?Site=US&V=190&M=NJM2611D

The MC33030 looks to have much better features as far as braking,
overcurrent, and overshoot, but requiring some additional external
circuitry for a PWM signal to drive it.

Am I understanding these two IC's correctly?

Thanks in advance for any help.

 

[joseph2k]

I have been learning about servo motor controllers and have a question
on the input signals required for each of these IC's.

I just want to make sure I understand things correctly before I choose
which controller to go with. Please correct me if I am wrong.

It looks as if the MC33030 requires a constant voltage at the input
which determines the position of the servo. This voltage would need
to be generated by a PWM to voltage converter if driving the circuit
with a standard RC pulse signal. Datasheet can be found here:
http://www.onsemi.com/pub/Collateral/MC33030-D.PDF

On the other hand, the NJM2611 looks as if the input signal is just
the standard RC PWM signal. This chip must have an internal PWM to
voltage converter (linear one shot block?). Datasheet can be found
here:
http://rocky.digikey.com/scripts/ProductInfo.dll?Site=US&V=190&M=NJM2611D

The MC33030 looks to have much better features as far as braking,
overcurrent, and overshoot, but requiring some additional external
circuitry for a PWM signal to drive it.

Am I understanding these two IC's correctly?

Thanks in advance for any help.

My best sugestion is to get one or two of each and tinker with them. Then
report back, some of us are interested.

 

[Terry]

My best sugestion is to get one or two of each and tinker with them. Then
report back, some of us are interested.
--
JosephKK
Gegen dummheit kampfen die Gotter Selbst, vergebens.
--Schiller- Hide quoted text -

- Show quoted text -

That's what I'm going to do. I am designing my RC controller for a
project I am working on. I am mostly interested because it seems that
the MC33030 uses a reference voltage that will be very easy to
generate with the ADCs that our on the micro I am using. I woudn't
have to use any PWM signals.

I will purchase a couple of both and post my results. It might be a
little while though.