Datasheet TDA7501 Datasheet (SGS Thomson Microelectronics)



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.

5/18

TDA7501

Figure 2. Quasi differential input-stage.

Figure 3. Mono differential input-stage.

Figure 4. Differentialinput-stagefor AM/FM.

6/18

TDA7501

Dual MPX mode

The TDA7501is able to support a twin tuner con­cept via the Dual-MPX-Mode. In this configuration
the MPX-pin and the AM-pin are acting as MPX1
and MPX2 inputs. The DC-Voltage at the
TUNER- -pin controls whether one or

Figure 4. Block diagram Dual MPX.

both MPX-signals are used to decode the stereo
FM-signal (see figure 4 Please note that the
thresholds have a hysteresis of 500mV. During
this mode the highohmic-mute acts on both in­puts in parallel.

For the programming of the Dual-MPX-Mode see
the programmingsection.

7/18

TDA7501

DESCRIPTIONOF THE OUTPUT PART

The TDA7501 has 6 independent outputstage
with volume control. The first 4 (main) outputs
have an input selector which allows to select be­sides the DAC-outputs CD-direct or Phone/Navi­gation-mix. In addition one can mix the SPKR1
with Phone/Navigationso that traffic or navigation
announcementscan bypass the DSP (see figure

5).
The TDA7500 CODEC outputs have a maximum

Figure 5. Output part.

output voltage of 0.5Vrms . To obtain 4Vrms , (in
the dual supply mode only) the signal is first am­plified to have a reference amplitude of 2V rms.
The following volume stage offers up to 15dB
gain which gives along with the programmable
6dB gain in the output-stage enough overdrive
capability. To achieve the maximum output swing
of 4Vrmsthe device must be supplied with an ad­ditional supply of 12V. With a single supply (V

dd

=VCC= 8.3V) 2.8Vrms are obtained at the output
at maximum.

8/18

Figure 6. Level-diagram.

TDA7501

TDA7501

REFERENCECONCEPT

For the input section the TDA7501 generates the
internal reference voltage by multiplying the V33
voltage by 1.2575.

The V33 voltage is also buffered and fed back to
the CODEC where it is used to generate all nec­essary references. For best performance it is rec­ommended to filter the V33 reference pin by
means of a passive second order lowpass as
shown in figure 7 This concept allows a direct DC
coupling betweenthe TDA7501 and the DSP

because of the accurate matching of DC levels.
On the output side the TDA7501 offers two main

Figure 7. Referencevoltage generation

TDA7500

modes: a single supply and a dual supply mode.

Dual supply mode

In this mode the outputs are able to provide up to
4V rms with a minimum supply V

of 12V as

CC

well as a output reference voltage set to half of

(bit D0 of the mode select byte set to ’1’). If

V

CC

the switch D1/byte mode select is open the out­put reference voltage must be defined externally
e.g. a zener diode with RC-lowpass. If the switch
is closed the reference voltage will be half of V cc
and only an external capacitorhasto be added.

TDA7501

9/18

TDA7501

Single supply mode

If V
the maximum possible output swing is about 2.8V
rms . The output reference voltage pin can be left
open or otherwise the internal voltage divider can
be used to generate for the outputs a V
ence.

DIGITAL BUS

The TDA7501 digital interface offers two different
protocols: SPI and I
SEL-pin has to beconnectedto V
at the SEL-pin is more than about 1V below the

Figure 8. Timing diagram for the SPI bus mode.

and Vddare connected to a single supply

CC

CC

2

C. To select I2C-mode the

. If the voltage

DD

/2 refer-

voltage the interface switches to SPI-mode.

V

DD

In both cases the interface is able to work with a

3.3V microprocessor as well as with a 5V micro­processor. For details of both protocols refer to
the programmingsection.

SPI BUS MODE
Interface protocol

The TDA7501SPI interfaceprotocol comprises:

- a subaddressand

- a sequenceof n databytes
each consistingof 8 bits (see figure 8).

2

C BUS MODE

I
Interface Protocol

The interfaceprotocol comprises:

-a start condition (S)

-a chip address byte (writemode only)

-a subaddress byte

-a sequenceof data (N-bytes + acknowledge)

-a stop condition (P)

CHIP ADDRESS

MSB LSB MSB LSB MSB LSB

S10001100

ACK 00I0SA3 SA2SA1SA0 ACK DATA ACK P

SUBADDRESS DATA 1...DATA n

ACK = Acknowledge
S = Start
P = Stop

10/18

TDA7501

SOFTWARESPECIFICATION FOR BOTH MODES
Auto increment

If bit I in the subaddressbyte is set to ”1”, the autoincrementof the subaddressis enabled.

Reset condition

A Power-On-Reset is invoked if the Supply-Voltage V dd is below than 3.5V. After POR the following
data is written automaticallyinto the registers of all subaddresses:

MSB LSB

11111110

Subaddresses

MSB LSB

D7 D6 I D4 SA3 SA2 SA1 SA0

0
0
0
0
0
0
0
0
1
1
1
1
1
1

0
1

0 0 0 must be ”0”

0
0
0
0
1
1
1
1
0
0
0
0
1
1

The programming after POR is marked bold-face
in the programmingtables.
With this programming all the outputs are muted
to their correspondingreferencevoltages.

Input selector 1L

0
0
1
1
0
0
1
1
0
0
1
1
0
0

0

Input selector 1R

1

Input selector 2L

0

Input selector 2R

1

Bypass selector

0

Configuration

1

Mode select

0

Output selector

1

Volume 1L

0

Volume 1R

1

Volume 2L

0

Volume 2R

1

Volume 3L

0

Volume 3R

1

Autoincrement mode off
Autoincrement mode on

Input selector1L..3R, bits D7..D3(subaddresses0..3)

Name

MSB LSB

D

0
0
0
0
0
0
0
0
1
1
1
1
1
1
1

1

D

7

0
0
0
0
1
1
1
1
0
0
0
0
1
1
1

1

D

6

0
0
1
1
0
0
0
1
0
0
1
1
0
0
0

1

D

5

0
1
0
1
0
1
0
1
0
1
0
1
0
1
0

1

D

4

0

1

D

3

D

2

D

1

Function

0

mute

off

on
gain

15dB
14dB
13dB
12dB
11dB
10dB
9dB
8dB
7dB
6dB
5dB
4dB
3dB
2dB
1dB
0dB

11/18

TDA7501

Input selector1L, bits D2..D0(subaddresses0)

MSB LSB

D

D

7

D

6

D

5

D

4

D

3

0
0
0
0
1
1

1

1

D

2

1

0
0
1
1
0
0

1

1

Input selector1R, bits D2..D0(subaddresses1)

MSB LSB

D

D

7

D

6

D

5

D

4

D

3

0
0
0
0
1
1

1

1

D

2

1

0
0
1
1
0
0

1

1

D

0

source select

Function

CDL

0

Phone/FDL

1

Navigation/FDR

0

Phone/Navigation mix

1

CassL

0

MPX-RDS

1

AM

0

AM-level

1

Function

D

0

source select

CDR

0

Phone/FDL

1

Navigation/FDR

0

Phone/Navigation mix

1

CassR

0

MPX-RDS

1

FM (or MPX1/MPX2 in Dual MPX mode)

0

AM-spikes

1

Input selector2L, bits D2..D0(subaddresses2)

MSB LSB

D

D

7

D

6

D

5

D

4

D

3

0
0
0
0
1
1

1

1

D

2

1

0
0
1
1
0
0

1

1

Input selector2R, bits D2..D0(subaddresses3)

MSB LSB

D

D

7

D

6

D

5

D

4

D

3

0
0
0
0
1
1

1

1

D

2

1

0
0
1
1
0
0

1

1

D

0

source select

Function

CDL

0

Phone/FDL

1

Navigation/FDR

0

Phone/Navigation mix

1

CassL

0

AM

1

FM-level

0

AM-level

1

Function

D

0

source select

CDR

0

Phone/FDL

1

Navigation/FDR

0

Phone/Navigation mix

1

CassR

0

MPX-RDS

1

FM (or MPX1/MPX2 in Dual MPX mode)

0

AM-spikes

1

12/18

Bypass selector(subaddress 4)

TDA7501

MSB LSB

D

D

7

D

6

D

5

D

4

D

3

0
0
0
0
1
1

1

1

D

2

0
0
1
1
0
0

1

1

D

1

0
1
0
1
0
1

0

1

1 must be ”1”

0
0
0
0
0
0
0
0
1
1
1
1
1
1
1

1

0
0
0
0
1
1
1
1
0
0
0
0
1
1
1

1

0
0
1
1
0
0
0
1
0
0
1
1
0
0
0

1

0
1
0
1
0
1
0
1
0
1
0
1
0
1
0

1

Function

0

mix level phone/navigation

0/mute

-1.6dB/-15.5dB

-3.6/-9.6dB

-6/-6dB

-9.6/-3.6dB

-15.5/-1.6dB
mute/0dB
mute

gain

15dB
14dB
13dB
12dB
11dB
10dB
9dB
8dB
7dB
6dB
5dB
4dB
3dB
2dB
1dB

0dB

Mode select (subaddress5)

MSB LSB

D

D

7

0

1

D

6

D

5

D

4

D

3

D

2

1

0

1

0

1

0

1

1 must be ”1”

0

1

0

1

D

0

Function

output gain
odB

0

+6dB

1

reference voltage setting for output

internal reference (V33*1.25)

external reference
internaldivider for outputreference voltage

connected to VCC/2

disconnected

fastcharge (switches at CD input)
open

closed

RDS-mute (high impedance)
muted

unmuted

mute pin function I
”0” does not activate the output mute

”1” activates the output mute

mute pin function II
”0” activates the high impedance mute

”1” does notactivate the high impedance mute

13/18

TDA7501

Configuration(subaddress 6)

MSB LSB

D

D

7

D

6

D

5

D

4

D

3

D

2

1

0
0

1

1

0
0
1

1

0
1
0

1

1 must be ”1”

0

1

0
0
1

1

0
1
0

1

Output selector(subaddress7)

MSB LSB

D

D

7

0
0
1

1

D

6

D

5

D

4

D

3

D

2

1

0
0

1

1

0
0
1

1

0
0
1

1

0
1
0

1

0
1
0

1

0
1
0
1

D

0

AM-IF rectifier gain

Function

+18dB

0

+15.5dB

1

+12dB

0

+6dB

1

AM-IF rectifier corner frequency

14kHz

18.5kHz
28kHz

56kHz

Dual MPX mode

on (control through Tuner-voltage)

off
forced Dual MPX control

MPX1 (allows automatic selection)
MPX2 (overwrites automatic selection)
MPX1+MPX2 (overwrites automatic selection)
MPX1 (overwrites automatic selection)

Function

D

0

source select SPKR 1L

Bypass

0

CDL

1

Phone/Navigation mix / IN1L

0

IN1L

1

source select SPKR 1R

Bypass
CDL
Phone/Navigation mix / IN1R

IN1R
source select SPKR 2L

Bypass
CDL
mute

IN2L
source select SPKR 2R

Bypass
CDL
mute

IN2R

14/18

Volume speaker outputs(subaddresses 8...13)

TDA7501

MSB LSB

D

D

7

1

:
1
1
0
0

:
0
0

:
0
0

x

D

6

0

:
0
0
0
0

:
0
0

:
1
1

1

D

5

0

:
0
0
0
0

:
0
0

:
0
0

1

D

4

0

:
0
0
0
0

:
0
1

:
0
0

x

D

3

1

;
0
0
0
0

:
1
0

:
1
1

x

D

2

1

;
0
0
0
0

:
1
0

:
1
1

x

D

1

1

;
0
0
0
0

:
1
0

:
1
1

x

0

1

;
1
0
0
1

:
1
0

:
0
1

x

+15dB
:
+1dB
0dB
0dB

-1dB
:

-15dB

-16dB
:

-78dB

-79dB

Mute

Function

The unused subaddresses 14/15 must be programmed to ”11111110”to allow software compati­bility to future extensions.

15/18

TDA7501

Figure 9. Applicationdiagram.

TDA7500

TDA7501

16/18

TDA7501

DIM.

mm inch

MIN. TYP. MAX. MIN. TYP. MAX.

A 1.60 0.063

A1 0.05 0.15 0.002

0.006

A2 1.35 1.40 1.45 0.053 0.055 0.057

B 0.30 0.37 0.45 0.012 0.014 0.018

C 0.09 0.20 0.004

0.008

D 12.00 0.472
D1 10.00 0.394
D3 8.00 0.315

e 0.80 0.031

E 12.00 0.472
E1 10.00 0.394
E3 8.00 0.315

L 0.45 0.60 0.75 0.018 0.024 0.030

L1 1.00 0.039

K 0°(min.),3.5°(typ.),7°(max.)

OUTLINE AND

MECHANICAL DATA

TQFP44 (10 x 10)

D

D1

A1

2333

34

B

44

1

e

11

TQFP4410

22

E

E1

12

L

0.10mm
.004

Seating Plane

B

K

A

A2

C

17/18

TDA7501

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of use of such information nor for any infringement of patents or other rights of third parties which may result from its use. No license is
granted by implication or otherwise under any patent or patent rights of 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.

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18/18