pls help tp simulate transcond TDA2003 amp - diyAudio
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Old 21st August 2015, 12:42 PM   #1
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Default pls help tp simulate transcond TDA2003 amp

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
Attached Files
File Type: asc tda2003 transconductance.asc (2.0 KB, 5 views)
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Old 21st August 2015, 12:45 PM   #2
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continued...

to opamp1 from ltspice I connected the name TDA2003, maybe the connection the model to circuit needs more operations?
Attached Images
File Type: png Picture1.png (16.5 KB, 67 views)
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Old 21st August 2015, 12:52 PM   #3
DUG is offline DUG  Canada
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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/te...CD00000123.pdf
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Old 21st August 2015, 01:04 PM   #4
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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...
Attached Files
File Type: asc tda2003 transconductance.asc (4.6 KB, 8 views)
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Last edited by padamiecki; 21st August 2015 at 01:13 PM.
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Old 21st August 2015, 02:25 PM   #5
Mooly is offline Mooly  United Kingdom
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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)
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Old 21st August 2015, 03:16 PM   #6
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Thank you Mooly!
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Old 21st August 2015, 04:47 PM   #7
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Pawel please post a schematic of your work for people to see that dont use simulators
Thanks
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Old 22nd August 2015, 08:28 AM   #8
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Quote:
Originally Posted by east electronics View Post
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
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Old 25th August 2015, 02:56 PM   #9
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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
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Old 9th September 2015, 01:02 PM   #10
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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!
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