SGS Thomson Microelectronics TDA7501 Datasheet



LINE-DRIVERFOR DIGITAL CARRADIO

INPUTS:

- QUASI DIFFERENTIALSTEREOINPUT
FORCD

- DIFFERENTIALSTEREO INPUTS FOR

PHONE ,NAVIGAT ION,FM,AM

- SINGLE-ENDEDINPUT FOR CASSETTE

- FOURINDEPENDEN TINPUTMULTIPLEXER

ANDGAINSTAGES

- ENVELOPE-DETECTORFOR
AM-NOISEBLANKING

- MIXINGOF PHONE AND NAVIGATION

- DC-CONNECTION TO DSP

- DUAL MPX INPUTS

OUTPUTS:

- 6OUTPUTCHANNELSWITHINDEPENDENT

VOLUME CONTROL

- 4MAIN OUTPUT CHANNELSWITHADDITIONAL

INPUTSELECTO RFORPHONE AND/OR
NAVIGATIONORCD

- OUTPUTS FORUPTO4Vrms

- AC-CONNECTIONFROMDSP

DIGITALCONTROL:

- SPI-BUSOR I
(SELECTABLE)

- DIRECTMUTE FOR THE OUTPUTSTAGES
AND/ORHIGH IMPEDANCEMPX MUTE

BLOCK DIAGRAM

2

C BUS INTERFACE

TDA7501

SIGNAL PROCESSOR

PRODUCT PREVIEW

TQFP44

DESCRIPTION

The Linedriver handles all analog input- and out­put-signals for the Digital Carradio Signal Proces­sor TDA7501. The device contains four inde­pendent input multiplexers to select the sources
for the DSP’s four AD-converters. Four additional
gain stages allow an adaptation to run the ADCs
in best S/N condition.

The six outputs have independent volume stages
with a large dynamic range. Using a 12V-supply
the outputs are able to drive up to 4Vrms .

April 1999

This is preliminary information on a new product foreseen to be developed. Details are subject to change without notice.

1/18

TDA7501

SUPPLY

Symbol Parameter Test Condition Min. Typ. Max. Unit

V

dd

V

P

I

S8

I

S12

SVRR Ripple Rejection @ 1kHz 60 dB

ABSOLUTE MAXIMUM RATINGS

Symbol Parameter Value Unit

V

DDmax

V

Smax

T

amb

T

ESD:

All pins are protectedagainst ESD according to the MIL883 standard.

Supply Voltage 7.5 8.3 10 V
Output Supply Voltage 12 V
Supply Current V
Supply Current V

dd
P

Operating Supply Voltage V
Operating Supply Voltage V

Vdd= 8.3V 15 mA
VP= 12V 15 mA

DD

s

10.5 V

13.0 V

Operating Temperature Range -40 to 85 °C

stg

Storage Temperature Range -55 to +150 °C

PIN CONNECTION

THERMAL DATA

Symbol Parameter Value Unit

2/18

R

th j-pins

Thermal Resistance Junction-pins Max. 65 °C/W

TDA7501

ELECTRICALCHARACTERISTICS (VDD=VS= 8.3V;T

=25°C; RL=10kΩ; all gains= 0dB;

amb

f = 1kHz; unless otherwise specified)

Symbol Parameter Test Condition Min. Typ. Max. Unit

GENERAL

V

CL

S

IN

G

IN MIN

G

IN MAX

G

STEP

V

DC

d

IN

V

DCout

R

out

QUASI DIFFERENTIAL CD STEREO INPUT (non inverting)

R

in

CMRR Common Mode Rejection Ratio V

V

N

DIFFERENTIAL PHONE/NAVIGATION/FM/AM INPUT (inverting)

R

in

CMRR Common Mode Rejection Ratio V

AM IF INPUT

R

in

CASSETTE INPUT (non inverting)

R

in

AM/FM-LEVEL INPUT

R

in

V

min

V

max

Dual MPX control (pin TUNER-)

V

CTRLMPX1

V

CTRLMPX2

V

CTRLMPX3

V

CTRLMPX4

SPEAKER OUTPUTS

R

in

G

MAX

A

MAX

Input Clipping Level 2.3 V
Input Separation 80 100 dB
Min. Input Gain 0 dB
Max. Input Gain 15 dB
Step Resolution 1 dB
DC Steps Adjacent Gain Steps 0.5 mV

G

Distortion V

MIN

OUT

to G

= 0.7V

MAX

RMS

5mV

0.002 0.08 %
Output DC-voltage pins 41..44 1.65 V
Output impedance 3 kΩ

Input Resistance (see Fig. 2) Differential 70 100 130 kΩ

=1V

CM

V

=1V

CM

@ 1kHz 45 70 dB

RMS

@ 10kHz 45 60 dB

RMS

Output-Noise 20Hz - 20kHz; unweighted 2.5 µV

Input Resistance (see Fig. 3) 35 50 65 k

=1V

CM

V

=1V

CM

@ 1kHz 40 70 dB

RMS

@ 10kHz 40 60 dB

RMS

Input Resistance 35 50 65 k

Input Resistance 70 100 130 k

Input Resistance 70 100 130 k
Minimum Input Voltage -0.4 V
Maximum Input Voltage 7 V

Control voltage for MPX 1+2 MPX1 -> MPX1 + MPX2 1.5 V
Control voltage for MPX2 MPX1 + MPX1 -> MPX2 4 V
Control voltage for MPX 1+2 MPX2 -> MPX1 + MPX2 3.5 V
Control voltage for MPX1 MPX1 + MPX2 -> MPX2 1 V

Input Impedance 35 50 65 kΩ
Max. Gain single supply mode

dual supply mode

Max. Attenuation single supply mode

dual supply mode

15
21

-79

-73

RMS

Ω

Ω

Ω

Ω

dB
dB

dB
dB

3/18

TDA7501

ELECTRICALCHARACTERISTICS (continued)

Symbol Parameter Test Condition Min. Typ. Max. Unit

A

STEP

A

MUTE

E

E

V

DC

V

DCOUT

V

CLIP

R

L

C

L

R

OUT

V

N

S/N Signal to Noise Ratio BW = 20Hz-20kHz V

d

out

S

C

ADCVDDREF (CODEC reference)

I

maxadc

BUS INPUTS

V

low

V

high

Step Resolution 1 dB
Output Mute Attenuation 80 100 dB
Attenuation Set Error from +15 to -40dB 2 dB
DC Steps Adjacent Attenuation Steps 0.1 3 mV
Output DC-voltage single supply mode

dual supply mode

4.15

outref

Output Clipping Level d = 0.3%, VCC=VDD= 8.3V

gain = 0dB
gain = 6dB

d = 0.3%, VCC= 12V
V

= 8.3V gain = 0dB

DD

2.3

2.8
4V

Output Load Resistance AC-coupled 5 k
Output Load Capacitance 10 nF
Output Impedance 30 120
Output Noise BW = 20Hz-20kHz muted 0dB

muted 6dB
gain = 0dB
gain = 6dB

=2V

O

RMS

RMS

distortion V

OUT

=1V

VO=4V

; all stages 0dB 0.005 0.08 %

RMS

3

7.5

10
13

106
110

Channel Separation left/right 80 100 dB

Max. Output Current pin 40 5 mA

Voltage for logic ”0” inputs SEL, SCL,SDA,MUTE 0.8 V
Voltage for logic ”1” inputs SEL, SCL,SDA,MUTE 2.4 V

V
V

V
V

RMS
RMS

RMS

Ω

Ω

µ
µ
µV
µ

dB
dB

V
V

V

4/18

TDA7501

DESCRIPTIONOF THE INPUT PART

On the input side, the DSPLD (see figure 1) con­nects the external audio- and tuner-signals to the
four AD-converters of the Digital Carradio Signal
Processor TDA7500. The audio signals are ad­justed by theinput gainstage to the internal refer-

Figure 1. Input part.

ence signal with 2V rms referred to 4.15V (=V33
à 1.2575). The following CODEC-interface at­tenuates the 2V

rms

to 0.8V

referred to the

rms

CODEC’s reference voltage of 1.65V which al­lows a DC-couplingto the TDA7500.

Input Stages

The decive offers several input stages for the dif­ferent signals which have to be handled by the
system. A quasi differential input (see figure 2)
can be used for (external) CD-changer. The two
mono differential inputs allow the connection of
Phone and Navigation(see figure 3) or it couldbe
used as fully differentialstereo input. Additionally
a single-ended stereo input is available for Cas­sette applications. The lower part of the input

section is dedicated to the tuner signals. Another
quasi differential input (see figure 4) is used to
connect AM and FM referred to the tuner refer­ence (Tuner-). This concept supports also double
tuner systems. Also two seperate level inputs are
present which are followed by level-shiftersto al­low the use of the TDA7500’s ADCs. For AM
noise blanking an envelope-detector driven by
the AM-IF is also available.

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TDA7501

Figure 2. Quasi differential input-stage.

Figure 3. Mono differential input-stage.

Figure 4. Differentialinput-stagefor AM/FM.

6/18