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TDA7501
LINE-DRIVER FOR DIGITAL CARRADIO SIGNAL PROCESSOR
PRODUCT PREVIEW
INPUTS: - QUASI DIFFERENTIAL STEREO INPUT FOR CD - DIFFERENTIAL STEREO INPUTS FOR PHONE, NAVIGATION, FM, AM - SINGLE-ENDED INPUT FOR CASSETTE - FOUR INDEPENDENT INPUT MULTIPLEXER AND GAIN STAGES - ENVELOPE-DETECTOR FOR AM-NOISEBLANKING - MIXING OF PHONE AND NAVIGATION - DC-CONNECTION TO DSP - DUAL MPX INPUTS OUTPUTS: - 6 OUTPUT CHANNELS WITH INDEPENDENT VOLUME CONTROL - 4 MAIN OUTPUT CHANNELS WITHADDITIONAL INPUT SELECTOR FOR PHONE AND/OR NAVIGATIONOR CD - OUTPUTS FOR UP TO 4V rms - AC-CONNECTION FROM DSP DIGITAL CONTROL: - SPI-BUS OR I2C BUS INTERFACE (SELECTABLE) - DIRECT MUTE FOR THE OUTPUT STAGES AND/OR HIGH IMPEDANCE MPX MUTE BLOCK DIAGRAM
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.
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TDA7501
SUPPLY
Symbol V dd VP IS8 IS12 SVRR Parameter Supply Voltage Output Supply Voltage Supply Current Vdd Supply Current VP Ripple Rejection @ 1kHz Vdd = 8.3V VP = 12V Test Condition Min. 7.5 Typ. 8.3 12 15 15 60 Max. 10 Unit V V mA mA dB
ABSOLUTE MAXIMUM RATINGS
Symbol VDDmax V Smax Tamb Tstg Parameter Operating Supply Voltage V DD Operating Supply Voltage V s Operating Temperature Range Storage Temperature Range Value 10.5 13.0 -40 to 85 -55 to +150 Unit V V C C
ESD: All pins are protected against ESD according to the MIL883 standard. PIN CONNECTION
THERMAL DATA
Symbol Rth j-pins Parameter Thermal Resistance Junction-pins Max. Value 65 Unit C/W
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TDA7501
ELECTRICAL CHARACTERISTICS (VDD = VS = 8.3V; Tamb = 25C; RL = 10k; all gains = 0dB; f = 1kHz; unless otherwise specified)
Symbol GENERAL VCL SIN GIN MIN GIN MAX GSTEP VDC Input Clipping Level Input Separation Min. Input Gain Max. Input Gain Step Resolution DC Steps Adjacent Gain Steps GMIN to GMAX d IN VDCout R out Distortion Output DC-voltage Output impedance VOUT = 0.7VRMS pins 41..44 80 2.3 100 0 15 1 0.5 5 0.002 1.65 3 0.08 VRMS dB dB dB dB mV mV % V k Parameter Test Condition Min. Typ. Max. Unit
QUASI DIFFERENTIAL CD STEREO INPUT (non inverting) R in CMRR Input Resistance (see Fig. 2) Common Mode Rejection Ratio Differential VCM = 1VRMS @ 1kHz VCM = 1VRMS @ 10kHz VN Output-Noise 20Hz - 20kHz; unweighted 70 45 45 100 70 60 2.5 130 k dB dB V
DIFFERENTIAL PHONE/NAVIGATION/FM/AM INPUT (inverting) R in CMRR Input Resistance (see Fig. 3) Common Mode Rejection Ratio VCM = 1VRMS @ 1kHz VCM = 1VRMS @ 10kHz AM IF INPUT R in R in Input Resistance 35 50 65 k 35 40 40 50 70 60 65 k dB dB
CASSETTE INPUT (non inverting) Input Resistance 70 100 130 k
AM/FM-LEVEL INPUT R in Vmin Vmax Input Resistance Minimum Input Voltage Maximum Input Voltage 70 -0.4 7 100 130 k V V
Dual MPX control (pin TUNER-) VCTRLMPX1 VCTRLMPX2 VCTRLMPX3 VCTRLMPX4 Control voltage for MPX 1+2 Control voltage for MPX2 Control voltage for MPX 1+2 Control voltage for MPX1 MPX1 -> MPX1 + MPX2 MPX1 + MPX1 -> MPX2 MPX2 -> MPX1 + MPX2 MPX1 + MPX2 -> MPX2 1.5 4 3.5 1 V V V V
SPEAKER OUTPUTS R in GMAX AMAX Input Impedance Max. Gain Max. Attenuation single supply mode dual supply mode single supply mode dual supply mode 35 50 15 21 -79 -73 65 k dB dB dB dB
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TDA7501
ELECTRICAL CHARACTERISTICS (continued)
Symbol ASTEP AMUTE EE VDC VDCOUT VCLIP Parameter Step Resolution Output Mute Attenuation Attenuation Set Error DC Steps Output DC-voltage Output Clipping Level from +15 to -40dB Adjacent Attenuation Steps single supply mode dual supply mode d = 0.3%, V CC = VDD = 8.3V gain = 0dB gain = 6dB d = 0.3%, V CC = 12V VDD = 8.3V gain = 0dB RL CL ROUT VN Output Load Resistance Output Load Capacitance Output Impedance Output Noise BW = 20Hz-20kHz muted 0dB muted 6dB gain = 0dB gain = 6dB BW = 20Hz-20kHz VO = 2VRMS V O = 4VRMS VOUT = 1VRMS; all stages 0dB 80 30 3 7.5 10 13 106 110 0.005 100 0.08 AC-coupled 5 10 120 0.1 4.15 outref 2.3 2.8 4 80 Test Condition Min. Typ. 1 100 2 3 Max. Unit dB dB dB mV V V VRMS VRMS VRMS k nF V V V V dB dB % dB
S/N dout SC
Signal to Noise Ratio distortion Channel Separation left/right
ADCVDDREF (CODEC reference) Imaxadc BUS INPUTS Vlow Vhigh Voltage for logic "0" Voltage for logic "1" inputs SEL, SCL,SDA,MUTE inputs SEL, SCL,SDA,MUTE 0.8 2.4 V V Max. Output Current pin 40 5 mA
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TDA7501
DESCRIPTION OF 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 the input gain stage to the internal referFigure 1. Input part. ence signal with 2V rms referred to 4.15V (=V33 A 1.2575). The following CODEC-interface attenuates the 2Vrms to 0.8Vrms referred to the CODEC's reference voltage of 1.65V which allows a DC-coupling to 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 could be used as fully differential stereo 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-shifters to 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. Differential input-stage for AM/FM.
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TDA7501
Dual MPX mode The TDA7501 is 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 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 programming section.
Figure 4. Block diagram Dual MPX.
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TDA7501
DESCRIPTION OF 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 announcements can 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 4Vrms the device must be supplied with an additional supply of 12V. With a single supply (Vdd =VCC = 8.3V) 2.8Vrms are obtained at the output at maximum.
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TDA7501
Figure 6. Level-diagram.
TDA7501
REFERENCE CONCEPT 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 between the TDA7501 and the DSP because of the accurate matching of DC levels. On the output side the TDA7501 offers two main Figure 7. Reference voltage generation
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 VCC of 12V as well as a output reference voltage set to half of VCC (bit D0 of the mode select byte set to '1'). If 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 capacitor has to be added.
TDA7500 TDA7501
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TDA7501
Single supply mode If VCC and Vdd are connected to a single supply 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 VCC/2 reference. VDD voltage the interface switches to SPI-mode. 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 programming section. SPI BUS MODE Interface protocol The TDA7501 SPI interface protocol comprises : - a subaddress and - a sequence of n databytes each consisting of 8 bits (see figure 8).
DIGITAL BUS The TDA7501 digital interface offers two different protocols: SPI and I2C. To select I2C-mode the SEL-pin has to beconnected to VDD. If the voltage at the SEL-pin is more than about 1V below the Figure 8. Timing diagram for the SPI bus mode.
I2C BUS MODE Interface Protocol The interface protocol comprises: -a start condition (S) -a chip address byte (write mode only) -a subaddress byte -a sequence of data (N-bytes + acknowledge) -a stop condition (P)
CHIP ADDRESS
SUBADDRESS
DATA 1...DATA n
MSB S 1 0 0 0 1 1 0
LSB
MSB 0 I
LSB 0 SA3 SA2 SA1 SA0 AC K
MSB DATA
LSB
AC P K
0 ACK 0
ACK = Acknowledge S = Start P = Stop
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TDA7501
SOFTWARE SPECIFICATION FOR BOTH MODES Auto increment If bit I in the subaddress byte is set to "1", the autoincrement of the subaddress is 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 automatically into the registers of all subaddresses :
MSB 1 1 1 1 1 1 1 LSB 0
Subaddresses
MSB D7 D6 I D4 SA3 0 0 0 0 0 0 0 0 1 1 1 1 1 1 0 1 0 0 0 SA2 0 0 0 0 1 1 1 1 0 0 0 0 1 1 SA1 0 0 1 1 0 0 1 1 0 0 1 1 0 0
The programming after POR is marked bold-face in the programming tables. With this programming all the outputs are muted to their corresponding reference voltages.
LSB SA0 0 1 0 1 0 1 0 1 0 1 0 1 0 1 Input selector 1L Input selector 1R Input selector 2L Input selector 2R Bypass selector Configuration Mode select Output selector Volume 1L Volume 1R Volume 2L Volume 2R Volume 3L Volume 3R Autoincrement mode off Autoincrement mode on must be "0" Name
Input selector 1L..3R, bits D7 ..D3 (subaddresses 0..3)
MSB D7 D6 D5 D4 D3 0 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 D2 D1 LSB D0 mute off on gain 15dB 14dB 13dB 12dB 11dB 10dB 9dB 8dB 7dB 6dB 5dB 4dB 3dB 2dB 1dB 0dB Function
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TDA7501
Input selector 1L, bits D2 ..D0 (subaddresses 0)
MSB D7 D6 D5 D4 D3 D2 0 0 0 0 1 1 1 1 D1 0 0 1 1 0 0 1 1 LSB D0 0 1 0 1 0 1 0 1 source select CDL Phone/FDL Navigation/FDR Phone/Navigation mix CassL MPX-RDS AM AM-level Function
Input selector 1R, bits D2 ..D0 (subaddresses 1)
MSB D7 D6 D5 D4 D3 D2 0 0 0 0 1 1 1 1 D1 0 0 1 1 0 0 1 1 LSB D0 0 1 0 1 0 1 0 1 source select CDR Phone/FDL Navigation/FDR Phone/Navigation mix CassR MPX-RDS FM (or MPX1/MPX2 in Dual MPX mode) AM-spikes Function
Input selector 2L, bits D2 ..D0 (subaddresses 2)
MSB D7 D6 D5 D4 D3 D2 0 0 0 0 1 1 1 1 D1 0 0 1 1 0 0 1 1 LSB D0 0 1 0 1 0 1 0 1 source select CDL Phone/FDL Navigation/FDR Phone/Navigation mix CassL AM FM-level AM-level Function
Input selector 2R, bits D2 ..D0 (subaddresses 3)
MSB D7 D6 D5 D4 D3 D2 0 0 0 0 1 1 1 1 D1 0 0 1 1 0 0 1 1 LSB D0 0 1 0 1 0 1 0 1 source select CDR Phone/FDL Navigation/FDR Phone/Navigation mix CassR MPX-RDS FM (or MPX1/MPX2 in Dual MPX mode) AM-spikes Function
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TDA7501
Bypass selector (subaddress 4)
MSB D7 D6 D5 D4 D3 D2 0 0 0 0 1 1 1 1 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 D1 0 0 1 1 0 0 1 1 LSB D0 0 1 0 1 0 1 0 1 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 must be "1" gain 15dB 14dB 13dB 12dB 11dB 10dB 9dB 8dB 7dB 6dB 5dB 4dB 3dB 2dB 1dB 0dB Function
Mode select (subaddress 5)
MSB D7 D6 D5 D4 D3 D2 D1 LSB D0 0 1 0 1 0 1 0 1 1 0 1 0 1 0 1 output gain odB +6dB reference voltage setting for output internal reference (V33*1.25) external reference internal divider for outputreference voltage connected to VCC/2 disconnected fastcharge (switches at CD input) open closed must be "1" 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 not activate the high impedance mute 13/18 Function
TDA7501
Configuration (subaddress 6)
MSB D7 D6 D5 D4 D3 D2 D1 0 0 1 1 0 0 1 1 1 0 1 0 0 1 1 0 1 0 1 0 1 0 1 LSB D0 0 1 0 1 AM-IF rectifier gain +18dB +15.5dB +12dB +6dB AM-IF rectifier corner frequency 14kHz 18.5kHz 28kHz 56kHz must be "1" 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
Output selector (subaddress 7)
MSB D7 D6 D5 D4 D3 D2 D1 0 0 1 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 LSB D0 0 1 0 1 source select SPKR 1L Bypass CDL Phone/Navigation mix / IN1L IN1L 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 Function
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TDA7501
Volume speaker outputs (subaddresses 8...13)
MSB D7 1 : 1 1 0 0 : 0 0 : 0 0 x D6 0 : 0 0 0 0 : 0 0 : 1 1 1 D5 0 : 0 0 0 0 : 0 0 : 0 0 1 D4 0 : 0 0 0 0 : 0 1 : 0 0 x D3 1 ; 0 0 0 0 : 1 0 : 1 1 x D2 1 ; 0 0 0 0 : 1 0 : 1 1 x D1 1 ; 0 0 0 0 : 1 0 : 1 1 x LSB D0 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.
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TDA7501
Figure 9. Application diagram.
TDA7500
TDA7501
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TDA7501
mm MIN. A A1 A2 B C D D1 D3 e E E1 E3 L L1 K 0.45 0.05 1.35 0.30 0.09 12.00 10.00 8.00 0.80 12.00 10.00 8.00 0.60 1.00 0.75 0.018 1.40 0.37 TYP. MAX. 1.60 0.15 1.45 0.45 0.20 0.002 0.053 0.012 0.004 0.472 0.394 0.315 0.031 0.472 0.394 0.315 0.024 0.039 0.030 0.055 0.014 MIN. inch TYP. MAX. 0.063 0.006 0.057 0.018 0.008
DIM.
OUTLINE AND MECHANICAL DATA
TQFP44 (10 x 10)
0(min.), 3.5(typ.), 7(max.)
D D1 A1
33 34 23 22
0.10mm .004 Seating Plane
A A2
E1
B
44 1 11
12
E
B
e
L
C
K
TQFP4410
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TDA7501
Information furnished is believed to be accurate and reliable. However, STMicroelectronics assumes no responsibility for the consequences 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. The ST logo is a registered trademark of STMicroelectronics (c) 1999 STMicroelectronics - Printed in Italy - All Rights Reserved STMicroelectronics GROUP OF COMPANIES Australia - Brazil - Canada - China - France - Germany - Italy - Japan - Korea - Malaysia - Malta - Mexico - Morocco - The Netherlands Singapore - Spain - Sweden - Switzerland - Taiwan - Thailand - United Kingdom - U.S.A. http://www.st.com
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