TDA7403DTR STMicroelectronics, TDA7403DTR Datasheet
TDA7403DTR
Specifications of TDA7403DTR
Related parts for TDA7403DTR
TDA7403DTR Summary of contents
Page 1
DEVICE INCLUDES AUDIO PROCESSOR, STEREO DECODER AND NOISEBLANKER HIGH PERFORMANCE SIGNAL PROCES- SOR WITH BASIC FUNCTIONS AM, FM, (MPX) AND CASSETTE INPUTS NO EXTERNAL COMPONENTS REQUIRED FULLY PROGRAMMABLE VIA I LOW DISTORTION AND NOISE DESCRIPTION The TDA7403 is a ...
Page 2
TDA7403 ABSOLUTE MAXIMUM RATINGS Symbol V Operating Supply Voltage S T Operating Ambient Temperature Range amb T Operating Storage Temperature Range stg SUPPLY Symbol Parameter V Supply Voltage S I Supply Current S SVRR Ripple Rejection @ 1KHz ESD All ...
Page 3
PIN DESCRIPTION N. Name 1 CASSR Cassette Input Right 2 CASSL Cassette Input Left 3 n.c. not connected 4 n.c. not connected 5 n.c. not connected 6 n.c. not connected 7 n.c. not connected Input 9 MPX ...
Page 4
TDA7403 AUDIO PROCESSOR PART Input Multiplexer MPX input Cassette stereo input AM mono Volume control 1dB attenuator Max. gain 20dB Max. attenuation 79dB Soft-step gain control Bass Control 2nd order frequency response Center frequency programmable in 4(5) steps ELECTRICAL CHARACTERISTICS ...
Page 5
ELECTRICAL CHARACTERISTICS (continued) Symbol Parameter SOFT STEP T Switch Time SW BASS CONTROL C Control Range RANGE A Step Resolution STEP f Center Frequency C Q Quality Factor BASS DC Bass-Dc-Gain GAIN TREBLE CONTROL C Control Range RANGE A Step ...
Page 6
TDA7403 DESCRIPTION OF THE AUDIOPROCESSOR Figure 1. Input stages CASSETTE 100K AM 100K MPX 100K Input stages The input circuits are the same as in preceeding ST audioprocessors with exception of the CD in- puts (see figure 1). The typical ...
Page 7
Softstep Volume When volume level is changed often an audible click appears at the output. The root cause of those clicks could be either a DC offset before the volume stage or the sudden change of the envelope of the ...
Page 8
TDA7403 Figure 4. Bass Control @ fc = 80Hz 15.0 10.0 5.0 0.0 -5.0 -10.0 -15.0 10.0 100.0 Figure 6. Bass Quality factors @ Gain = 14dB 80Hz 15.0 12.5 10.0 7.5 5.0 2.5 0.0 ...
Page 9
STEREODECODER PART No external components necessary PLL with adjustment free fully integrated VCO Automatic pilot dependent MONO/STEREO switching Very high suppression of intermodulation and interference Programmable Roll-Off compensation ELECTRICAL CHARACTERISTICS (V 75KHz deviation 1KHz Symbol Parameter ...
Page 10
TDA7403 ELECTRICAL CHARACTERISTICS (continued) Symbol Parameter STEREOBLEND and HIGHCUT CONTROL VHCH Min.Voltage for NO Highcut min VHCH Max. Voltage for NO Highcut max VHCH Step Resolution step VHCL Min. Voltage for FULL High cut min VHCL Max. Voltage for FULL ...
Page 11
NOISE BLANKER PART internal 2nd order 140kHz high pass filter programmable trigger threshold ELECTRICAL CHARACTERISTICS (continued) Symbol Parameter Trigger Threshold TR V Noise Controlled Trigger TRNOISE 2) Threshold V Rectifier Voltage RECT V deviation dependent RECT DEV ...
Page 12
TDA7403 Figure 10. Trigger Threshold vs. V VTH 65mV 8 STEPS 30mV Figure 11. Deviation Controlled Trigger Ad- justment V PEAK ( 2.8 2.0 1.2 0 D97AU649 Figure 13. Block diagram of the stereo ...
Page 13
DESCRIPTION OF STEREODECODER The stereodecoder part of the TDA7403 (see Fig. 16) contains all functions necessary to demodu- late the MPX signal like pilot tone dependent MONO/STEREO switching "stereoblend" and "highcut" functions. Adaptations like programmable input gain, roll-off compensation, selectable ...
Page 14
TDA7403 by reading the status byte of the TDA7403 via I2C bus. Fieldstrength Control The fieldstrength input is used to control the high cut and the stereoblend function. In addition the signal can be also used to control the noise- ...
Page 15
Highcut Control The highcut control setup is similar to the stereoblend control setup : the starting point VHCH can be set with 2 bits to be 42, 50 66% of REF5V whereas the range can be set to ...
Page 16
TDA7403 Automatic Threshold Control Besides the noise controlled threshold adjust- ment there is an additional possibility for influenc- ing the trigger threshold depending on the stereoblend control. The point where the MPX signal starts to become noisy is ...
Page 17
I C BUS INTERFACE DESCRIPTION Interface Protocol The interface protocol comprises: -a start condition (S) -a chip address byte (the LSB bit determines read CHIP ADDRESS MSB LSB R/W ACK D97AU627 ...
Page 18
TDA7403 DATA BYTE SPECIFICATION Input Selector MSB For example to select the CD input in quasi-differential mode ...
Page 19
Mute, Beep and Mixing MSB Note: for more information to the Stereodecoder-Softmute-Influence please refer to the stereodecoder description. Volume MSB ...
Page 20
TDA7403 Bass & Treble Attenuation MSB ...
Page 21
Speaker Attenuation (LF, LR, RF, RR) MSB ...
Page 22
TDA7403 Noiseblanker MSB Fieldstrength Control MSB ...
Page 23
Stereodecoder Adjustment MSB Testing MSB ...
Page 24
TDA7403 mm DIM. MIN. TYP. MAX. MIN. A 2.35 2.65 0.093 A1 0.1 0.3 0.004 B 0.33 0.51 0.013 C 0.23 0.32 0.009 D 12.6 13 0.496 E 7.4 7.6 0.291 e 1. 10.65 0.394 h 0.25 0.75 ...
Page 25
... STMicroelectronics. Specification mentioned in this publication are subject to change without notice. This publication supersedes and replaces all information previously supplied. STMicroelectronics products are not authorized for use as critical components in life support devices or systems without express written approval of STMicroelectronics. The ST logo is a registered trademark of STMicroelectronics © ...