pls help tp simulate transcond TDA2003 amp

[padamiecki]

Hi
I would like to build the amp like in attachment
but simulate it first.

Having TDA2003 model I cannot run the simulation,
please help!

thank you in advance

 

[padamiecki]

continued...

to opamp1 from ltspice I connected the name TDA2003, maybe the connection the model to circuit needs more operations?

 

[DUG]

You have a DC path to gnd in the - input line...data sheet has a cap in there.

http://www.st.com/web/en/resource/technical/document/datasheet/CD00000123.pdf

 

[padamiecki]

thank you
but the connection I drove is good, it is take after an output cap, and please remember, this is transconductance amp so its connections are different than application note.
bellow corrected spice directives...

 

[Mooly]

I think DUG is correct, you have a direct ground conection to the inverting input. It doesn't mater that the output is AC coupled, the input pin is still ground referenced.

(your .asc file wont run on a default LT installation. There are unknown models and subcircuits being called up that aren't included in your file)

 

[padamiecki]

Thank you Mooly!

 

[east electronics]

Pawel please post a schematic of your work for people to see that dont use simulators
Thanks

 

[padamiecki]

Pawel please post a schematic of your work for people to see that dont use simulators
Thanks

Of course I will
but I still cannot run proper simulation, to check if this has a chance of working good

 

[padamiecki]

please advise
how to create sub and cir files of TDA2003
with this model:
* IN+
* | IN-
* | | GND
* | | | OUT
* | | | | VPLUS
* | | | | |
.SUBCKT TDA2003 1 2 3 4 5
R_R6 1 N_1 150K
RCON_TAG2 1 0 1G
V_VOS2 N_2 2 0.65V
R_R8 5 N_3 20K
V_VOS1 N_1 3 1.3V
F_F1 2 3 VF_F1 0.5
VF_F1 N_3 3 1.8V
** Text Force **
.MODEL D D
D_D1 N_4 N_5 D
RCON_TAG3 N_6 0 1G
G_G1 N_7 N_6 VALUE { 5A*TANH(450*V(N_8, N_6)) }
R_R7 2 4 20K
F_F3 N_4 5 VF_F3 1
VF_F3 5 N_7 0
D_D2 5 N_4 D
R_RNOF1 5 4 1G
RFUD1 N_9 N_8 1
RFUD2 N_8 0 1G
RCON_TAG4 N_9 0 1G
R_RNOF2 4 3 1G
C_COUT 4 3 5pF
F_F2 5 3 VF_F2 1
VF_F2 N_5 5 0
X_U1 1 N_2 N_9 5 3 OpAmpConfigRails PARAMS: GDC=100K GBW=10 SLEW=1
+ ROUT=100 PM=45 VMP=0.65 VMN=0.65 W=10m
R_ROUT N_6 4 120m
.ENDS TDA2003

 

[padamiecki]

again
please nurse me
how to create
sub and asy
circuit of TDA2003
on the base of the model as in above post.

thank you in advance!

 

[padamiecki]

Hi
the circuit should look like this: http://www.diyaudio.com/forums/atta...nductance-current-amplifier-tda2003-trans.jpg
as reported in that thread the amp is working
hope this helps