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| CXA2511AQ Dolby B-C Type Noise Reduction System with Playback Equalizer Amplifier Description The CXA2511AQ is an IC designed for use in car stereo cassette decks. Functions include Dolby B-C type noise reduction (NR) system, playback equalizer amplifier and music sensor into a single chip. Features * Few external parts * Small package (40-pin QFP) * Same pin configuration as for the Dolby B type NR system (CXA2510AQ) and no Dolby NR system (CXA2509AQ) * Dolby B-C type NR and playback equalizer amplifier into a single chip * FORWARD/REVERSE head select switch * Two-system (TAPE/AUX) input select switch * Music signal interval detection level can be set by the external resistors/capacitors (2 modes). * High-frequency cut-off of the music sensor circuit can be adjusted by the external capacitance. Applications * Car stereo cassette decks * Playback-only cassette decks 40 pin QFP (Plastic) Structure Bipolar silicon monolithic IC Absolute Maximum Ratings * Supply voltage VCC * Operating temperature Topr * Storage temperature Tstg * Power dissipation PD Operating Condition Supply voltage 12 -40 to +85 -65 to +150 430 V C C mW VCC 7.8 to 11 V This IC is available only to the licensees of Dolby Laboratories Licensing Corporation from whom licensing and applications information may be obtained. "Dolby" and the double D symbols are trademarks of Dolby Laboratories Licensing Corporation. Sony reserves the right to change products and specifications without prior notice. This information does not convey any license by any implication or otherwise under any patents or other right. Application circuits shown, if any, are typical examples illustrating the operation of the devices. Sony cannot assume responsibility for any problems arising out of the use of these circuits. -1- E96828-PS CXA2511AQ Block Diagram and Pin Configuration PBEQ2 AUXIN2 LINEOUT2 PBOUT2 TAPEIN2 DIREF TCH2 30 PBFB2 31 PBRIN2 32 29 28 27 26 25 24 23 NR 22 21 20 MSMODE 19 DRSW 120/70 OFF/ B/C x1 T2 NR BIAS TAPE/AUX TAPE EQ MS MODE 18 TAPESW 17 INSW NR MODE 16 NRSW 15 NRMODE MS ON/ OFF DET F3 T1 OFF/ B/C 12 MSTC 11 G1FB 9 10 14 MSOUT 13 DGND PBREF2 33 F2 PBFIN2 34 VCT 35 VCT PBGND 36 PBFIN1 37 F1 PBREF1 38 PBRIN1 39 PBFB1 40 1 2 x1 LPF FWD/RVS VCC 120/70 3 4 5 6 7 8 NR TAPEIN1 PBOUT1 LINEOUT1 AUXIN1 PBEQ1 TCL1 VCC -2- MSLPF TCH1 G2FB MSSW GND TCL2 CXA2511AQ Pin Description Pin No. Symbol Typical pin voltage DC AC I/O I/O resistance (Ta = 25C, VCC = 8.0V, DVCC = 5.0V) Equivalent circuit Description Vcc 40k 1 30 PBEQ1 PBEQ2 1k 4.0V -- O -- 5k 1 30 1k Resistance for selecting the playback equalizer amplifier time constant GND Vcc 2 29 PBOUT1 PBOUT2 200 4.0V -25dBm O -- 2 29 200 Playback equalizer amplifier output GND 3 VCC 8.0V -- -- -- Vcc Power supply 4 27 TAPEIN1 TAPEIN2 4.0V -30dBm 4 TAPE input 147 40k 20p I 40k 27 5 5 26 AUXIN1 AUXIN2 26 VGS GND External input Vcc 100k 6 MSLPF 4.0V -- -- 100k 6 147 64p GND Cut-off frequency adjustment of the music sensor LPF -3- CXA2511AQ Pin No. Symbol Typical pin voltage DC AC I/O I/O resistance Equivalent circuit Description Vcc 7 24 LINEOUT1 LINEOUT2 4.0V -6dBm O -- 147 7 24 200 200 Line output 22.5k GND Vcc 8 23 TCH1 TCH2 36k 0.3V -- -- -- 147 8 23 330k Time constant for the HLS GND Vcc 13.5k 9 22 TCL1 TCL2 0.3V -- -- -- 147 9 22 480k Time constant for the LLS GND Vcc 10 11 G2FB G1FB 500 4.0V -- -- -- 147 10 11 500 Music signal interval detection level setting GND 13 DGND 0.0V -- -- -- -4- Logic ground (Connect to GND.) CXA2511AQ Pin No. Symbol Typical pin voltage DC AC I/O I/O resistance Equivalent circuit Description Vcc 12 MSTC -- -- -- -- 147 12 853 10k DGND GND Time constant for detecting the music signal interval Vcc 14 MSOUT 0.2V when a signal is detected; DVcc when no signal is detected DVcc 100k -- O -- 147 14 Music sensor output DGND GND 15 NRMODE Vcc Dolby NR mode control Low (open): Dolby B type NR High: Dolby C type NR Line amplifier input select control Low (open): TAPEIN High: AUXIN 17 INSW 0.0V when open 15 1.1k 100k DGND -- I 100k 17 21 21 MSSW GND Music sensor control Low (open): MS ON High: MS OFF Dolby NR control Low (open): NR OFF High: NR ON Playback equalizer amplifier control Low (open): 120s High: 70s 16 NRSW Vcc 18 TAPESW 0.0V when open 16 1.1k 100k DGND -- I 100k 18 19 19 DRSW GND Head select control Low (open): FORWARD High: REVERSE -5- CXA2511AQ Pin No. Symbol Typical pin voltage DC AC I/O I/O resistance Equivalent circuit Vcc Description 20 MSMODE 0.0V when open 1.1k -- I 100k 20 100k DGND GND Music sensor mode control Low (open): G1 High: G2 Vcc 25 DIREF 1.2V -- -- -- 25 147 Resistance for setting the Dolby NR reference current (Connects 20k between DIREF pin and GND for the standard setting.) GND 28 GND 0.0V -- -- -- Ground Playback equalizer amplifier feedback 31 40 PBFB2 PBFB1 4.0V -70dBm I -- Vcc 32 39 PBRIN2 PBRIN1 4.0V -70dBm I -- 32 39 34 36 PBREF PBREF GND 50p 50p 31 40 Playback equalizer amplifier input (REVERSE head connected) 34 37 PBFIN2 PBFIN1 Playback equalizer amplifier input (FORWARD head connected) -6- CXA2511AQ Pin No. Symbol Typical pin voltage DC AC I/O I/O resistance Equivalent circuit Vcc Description 33 38 PBREF2 PBREF1 200 4.0V -- O -- 33 38 200 Playback equalizer amplifier reference (Vcc/2 output) GND Vcc 30k 147 35 VCT 4.0V -- O -- 35 45k VGS x1 Center (Vcc/2 output) 30k GND 36 PBGND 0.0V -- -- -- Playback equalizer amplifier ground (Connect to ground.) -7- CXA2511AQ Electrical Characteristics Item Operating voltage Current consumption Symbol Vopr ICC Measurement conditions (Ta = 25C, VCC = 8.0V. DVCC = 5.0V) Min. 7.8 No signal, NR OFF, TAPE, 120s, MS ON 13.0 Typ. 8.0 19.2 Max. 11.0 25.0 Unit V mA Dolby NR (0dB = Dolby level LINEOUT of -6dBm) TAPEIN input sensitivity AUXIN input sensitivity B type decode boost characteristics 1 B type decode boost characteristics 2 B type decode boost characteristics 3 B type decode boost characteristics 4 B type decode boost characteristics 5 C type decode boost characteristics 1 C type decode boost characteristics 2 C type decode boost characteristics 3 C type decode boost characteristics 4 C type decode boost characteristics 5 C type decode boost characteristics 6 Total harmonic distortion 1 Total harmonic distortion 2 Total harmonic distortion 3 Decode S/N ratio 1 Decode S/N ratio 2 Signal handling Crosstalk between channels 1 Crosstalk between channels 2 VTIN VAUX BP1 BP2 BP3 BP4 BP5 CP1 CP2 CP3 CP4 CP5 CP6 THD1 THD2 THD3 SN1 SN2 SH1 CT1 CT2 TAPEIN 1kHz, LINEOUT 0dB, NR OFF AUXIN 1kHz, LINEOUT 0dB TAPEIN 500Hz, LINEOUT -25dB, NR B TAPEIN 2kHz, LINEOUT -25dB, NR B TAPEIN 5kHz, LINEOUT -25dB, NR B TAPEIN 10kHz, LINEOUT -40dB, NR B TAPEIN 10kHz, LINEOUT 0dB, NR B TAPEIN 500Hz, LINEOUT -60dB, NR C TAPEIN 500Hz, LINEOUT -25dB, NR C TAPEIN 2kHz, LINEOUT -60dB, NR C TAPEIN 2kHz, LINEOUT -25dB, NR C TAPEIN 5kHz, LINEOUT -25dB, NR C TAPEIN 10kHz, LINEOUT 0dB, NR C TAPEIN 1kHz -20dBm, NR OFF, RL = 2.7k TAPEIN 1kHz -20dBm, NR B, RL = 2.7k TAPEIN 1kHz -20dBm, NR C, RL = 2.7k No signal, NR B, Rg = 5.1k, CCIR/ARM filter used No signal, NR C, Rg = 5.1k, CCIR/ARM filter used TAPEIN 1kHz, NR OFF, RL = 2.7k, THD = 1% TAPEIN 1kHz -24dBm, NR OFF, 1kHz BPF used AUXIN 1kHz -24dBm, 1kHz BPF used -32.0 -30.0 -28.0 dBm -32.0 -30.0 -28.0 dBm 1.4 5.5 3.9 9.7 -1.1 14.2 7.2 18.7 5.4 3.5 -5.5 -- -- -- 77.0 80.0 13.0 -- -- 2.9 7.0 5.4 10.4 0.4 16.2 9.2 20.7 7.4 5.5 -3.5 0.01 0.04 0.05 87.0 82.0 14.4 4.4 8.5 6.9 11.9 1.9 18.2 11.2 22.7 9.4 7.5 -1.5 0.2 0.2 0.3 -- -- -- dB dB dB dB dB dB dB dB dB dB dB % % % dB dB dB dB dB -86.0 -70.0 -86.0 -70.0 -8- CXA2511AQ Item Crosstalk between TAPE and AUX Output DC offset voltage Symbol CT3 VOS1 Measurement conditions TAPE (AUX) IN 1kHz -24dBm, NR OFF, AUX (TAPE) mode, 1kHz BPF used 1 No signal, NR OFF, difference from VCT Min. -- -0.1 Typ. Max. Unit dB V -67.0 -65.0 0.0 0.1 Playback Equalizer Amplifier Playback equalizer amplifier reference output level Playback equalizer amplifier frequency response 1 Playback equalizer amplifier frequency response 2 Signal handling PBREF F120 F70 SH2 PBIN 315Hz -70dBm, 120s mode PBIN 2.7kHz -58.5dBm, 120s mode at 315Hz PBIN 4.5kHz -53.8dBm, 70s mode at 315Hz PBIN 1kHz, 120s mode, RL = 2.7k, THD = 1% PBIN 1kHz -52dBm, 120s mode, RL = 2.7k No signal, 70s mode, Rg = 680, CCIR/ARM filter used No signal, 120s mode, Rg = 680, difference from VCT PBIN 1kHz -52dBm, 120s mode, 1kHz BPF used PBIN 1kHz -52dBm, 120s mode, 1kHz BPF used -27.0 -25.0 -23.0 dBm -1.5 -1.5 -10.0 -- 59.0 -1.0 -- -- 0.0 0.0 -3.0 0.07 64.5 0.0 1.5 1.5 -- 0.5 -- 1.0 dB dB dBm % dB V dB dB Total harmonic distortion THD4 S/N ratio SN3 Output DC offset voltage VOS2 Crosstalk between channels CT4 -81.0 -70.0 -80.0 -70.0 Crosstalk between CT5 FORWARD and REVERSE Music Sensor Signal detection level 1 Signal detection level 2 MS output leak current MS output saturation voltage Logic Voltage Low level High level VIL VIH VMS1 VMS2 IOH VOL TAPEIN 5kHz, MS ON, G1 mode, external constant of 39k and 0.0047F TAPEIN 5kHz, MS ON, G2 mode, external constant of 3.9k and 0.47F No signal, MS OFF, G1 mode TAPEIN 5kHz -30dBm, MS ON, G1 mode, 1mA applied to MSOUT pin -43.0 -40.0 -37.0 dBm -63.0 -60.0 -57.0 dBm -- -- 0.0 0.3 1.0 1.0 A V Input voltage of NRMODE, NRSW, INSW, TAPESW, DRSW, MSMODE, MSSW Input voltage of NRMODE, NRSW, INSW, TAPESW, DRSW, MSMODE, MSSW 0.0 2.5 -- -- 0.5 DVCC V V 1 The crosstalk between TAPE and AUX is measured with a 5.1k external resistor connected to AUXIN1 (Pin 5). In this condition, the crosstalk is approximately -67dB due to the signal leak from MSLPF (Pin 6). In order to improve the crosstalk between TAPE and AUX, AUXIN1 pin should be driven with a low impedance. -9- CXA2511AQ Electrical Characteristics Measurement Circuit R35 10k R34 100 R33 10k R32 100 R31 10k S23 S22 S21 S20 S19 DC Voltmeter S8 S6 R14 2.7k R10 12k Audio SG R4 300k C7 0.01 C5 2.2 R3 270 R12 18k 30 29 R16 5.1k S10 S13 R18 5.1k R21 2.7k 0dB or 30dB Amp C19 0.1 C21 0.068 R36 50k C9 2.2 28 C12 1 27 C14 1 R19 20k 26 25 C17 2.2 24 MSSW H/L S24 OFF: 0dB ON: 30dB 23 22 21 GND GND MSMODE H/L DRSW H/L TAPESW H/L INSW H/L NRSW H/L NRMODE H/L R24 100k DVCC R30 10k S18 CCIR/ARM S25 C24 0.1 +20dB 1kHz BPF +20dB DIN Audio "A" WTG LINEOUT2 AUXIN2 PBEQ2 TCL2 GND TAPEIN2 PBOUT2 MSSW DIREF TCH2 31 PBFB2 MSMODE 20 DRSW 19 TAPESW 18 INSW 17 NRSW 16 NRMODE 15 MSOUT 14 DGND 13 MSTC 12 S29 S4 S3 Power Supply VCC C4 R8 2.2 680 32 PBRIN2 R9 680 33 PBREF2 34 PBFIN2 35 VCT S28 S27 C3 22 S2 GND C2 2.2 R7 680 S1 C1 2.2 R2 270 R6 680 36 PBGND 37 PBFIN1 38 PBREF1 39 PBRIN1 S26 LINEOUT1 PBOUT1 TAPEIN1 PBEQ1 AUXIN1 MSLPF DC Ammeter A 40 PBFB1 C6 0.01 G1FB 11 TCH1 R1 300k R5 12k 1 R11 C8 18k 2.2 2 3 C11 1 4 C13 1 5 6 7 C15 C16 270p 2.2 8 9 10 R22 3.9k R23 39k C23 4.7n Distortion Analyzer S8 R15 5.1k R17 5.1k R13 2.7k C10 22 R20 2.7k S11 S5 S7 S12 C18 C20 C22 0.1 0.068 0.47 G2FB VCC TCL1 R25 1MEG AC Voltmeter Oscilloscope R29 10k R28 100 R27 10k R26 100 Note S17 S16 S15 S14 5% : 1% 5% : 2% 10% 1. Resistor tolerance 2. Capacitor tolerance Coupling Capacitor - 10 - CXA2511AQ Application Circuit 1 GND R12 R14 300k 33k C7 0.01 R9 18k R11 12k C10 2.2 AUXIN2 LINEOUT2 GND GND GND C12 2.2 R15 20k C15 2.2 C17 0.1 C19 0.068 PBOUT2 TAPEIN2 PBEQ2 AUXIN2 LINEOUT2 DIREF TCH2 30 PBFB2 C4 470p RVS2 R6 180 R4 100k PBRIN2 PBREF2 PBFIN2 C3 R3 470p 100k GND C5 22 GND C2 R2 470p 100k FWD1 PBREF1 R1 100k C1 470p R5 180 PBRIN1 PBFB1 VCT PBGND PBFIN1 31 32 29 28 27 26 25 24 23 NR 22 MSSW 21 20 19 MSMODE DRSW TAPESW INSW NRSW NRMODE R19 MSOUT 100k DGND MSTC G1FB R18 1MEG C22 0.1 GND DVCC To Microcomputer DGND From Microcomputer 120/70 GND OFF/ B/C x1 T2 NR BIAS TAPE/AUX TAPE EQ MS MODE 18 17 NR MODE 16 15 DET F3 T1 OFF/ B/C 12 11 9 10 MS ON/ OFF 14 13 33 F2 34 35 VCT 36 37 F1 38 39 40 1 2 x1 LPF FWD2 FWD/RVS VCC RVS1 120/70 3 4 5 6 7 8 NR LINEOUT1 AUXIN1 PBEQ1 TCL1 VCC TCL2 TAPEIN1 PBOUT1 MSLPF TCH1 G2FB R16 3.9k R8 18k C6 0.01 R17 39k C21 4.7n GND R10 12k C9 2.2 C11 C13 C14 2.2 0.001 2.2 C16 C18 0.1 0.068 C20 0.47 R7 R13 300k 33k VCC C8 22 GND AUXIN1 GND GND LINEOUT1 GND GND Application circuits shown are typical examples illustrating the operation of the devices. Sony cannot assume responsibility for any problems arising out of the use of these circuits or for any infringement of third party patent and other right due to same. - 11 - CXA2511AQ Application Circuit 2 AUXIN2 R12 300k C7 0.01 R9 18k R11 12k GND LINEOUT2 GND GND GND C10 2.2 C12 2.2 R13 20k C15 2.2 C17 0.1 C19 0.068 PBOUT2 TAPEIN2 PBEQ2 AUXIN2 LINEOUT2 DIREF TCH2 30 PBFB2 R5 C1 500 470p RVS2 PBRIN2 31 32 29 28 27 26 25 24 23 NR 22 MSSW 21 20 19 MSMODE DRSW TAPESW INSW NRSW NRMODE R17 MSOUT 100k DGND MSTC G1FB R16 1MEG C22 0.1 GND DVCC To Microcomputer DGND From Microcomputer 120/70 GND OFF/ B/C x1 T2 NR BIAS TAPE/AUX TAPE EQ MS MODE 18 17 NR MODE 16 15 DET F3 T1 OFF/ B/C 12 11 9 10 MS ON/ OFF 14 13 R1 100k PBREF2 R2 100k C2 470p GND GND C3 470p C5 22 PBFIN2 VCT PBGND PBFIN1 R3 100k PBREF1 R4 100k PBRIN1 C4 R6 470p 500 PBFB1 33 F2 34 35 VCT 36 37 F1 38 39 40 1 2 x1 LPF FWD2 FWD/RVS VCC FWD1 RVS1 120/70 3 4 5 6 7 8 NR LINEOUT1 AUXIN1 PBEQ1 TCL1 VCC TCL2 TAPEIN1 PBOUT1 MSLPF TCH1 G2FB R14 3.9k R8 18k C6 0.01 R15 39k C21 4.7n GND R10 12k R7 300k C9 2.2 C11 C13 C14 2.2 0.001 2.2 C16 C18 0.1 0.068 C20 0.47 VCC C8 AUXIN1 22 GND GND GND LINEOUT1 GND GND Application circuits shown are typical examples illustrating the operation of the devices. Sony cannot assume responsibility for any problems arising out of the use of these circuits or for any infringement of third party patent and other right due to same. - 12 - CXA2511AQ Description of Operation 1. Signal route 24dB NR ON NR OFF 24dB PB IN FWD AMP1 70s TAPE AUX 24dB RVS AMP2 NR PBFB PBEQ PBOUT TAPEIN AUXIN (-30dBm) LINEOUT (-6dBm Dolby level) Fig. 1. Signal route block diagram AMP1 and AMP2 are operational amplifiers. AMP1 composes the playback equalizer amplifier by attaching an external resistor and capacitor to PBFB, PBEQ and PBOUT pins. AMP2 is an input selector and a line amplifier. The gain is 24dB when NR is OFF. The Dolby NR reference level is -6dBm (LINEOUT). - 13 - CXA2511AQ 2. Adjustment method 0 -10 -20 -30 -40 PBOUT -50 -60 -70 -80 (dBm) PBIN (HEAD) 400Hz 200nWb/m: Dolby level reference tape VR adjustment TAPEIN AUXIN -30dBm -30dBm -6dBm (Dolby level) LINEOUT Fig. 2-1. Level diagram (application circuit 1) 0 -10 -20 -30 -40 TAPEIN -50 -60 -70 -80 (dBm) PBIN (HEAD) 400Hz 200nWb/m: Dolby level reference tape AUXIN PBOUT VR adjustment -30dBm -30dBm -6dBm (Dolby level) LINEOUT Fig. 2-2. Level diagram (application circuit 2) Adjust the playback equalizer amplifier gain so that -6dBm (Dolby level) is output on LINEOUT (Pins 7 and 24) by playing back the reference tape for Dolby level adjustment. Adjustment should be performed according to the rules of Dolby Laboratories Licensing Corporation because this IC has the built-in Dolby NR system. List of Calibration Cassette Tape Dolby level is defined as 200nWb/m measured according to the ANSI high efficiency head method. The followings are the reference tapes specified by Dolby Laboratories Licensing Corporation. 1. A-bex Laboratories, Inc. (part no. TCC-130) 2. BASF (product code 09797 XE) 3. Kaneon Corp. (LC Engineering part no. LCT-7001) 4. Standard Tape Laboratory (catalogue no. 28) 5. TEAC Corporation, Japan (part no. MTT150) 6. TEAC Corporation of America (part no. MTT150) 7. Victor Company of Japan, Ltd. (part no. TMT-6130, VTT-727) 8. Sony Corporation (part no. TY-256) - 14 - CXA2511AQ 3. Playback equalizer amplifier Gain (dB) G1 T1 PB IN FWD SW1 AMP1 SW2 70s T2 -6dB/oct RVS PBFB C1 R1 PBREF PBEQ R4 R3 R2 PBOUT T3 f1 f2 f3 Frequency [Hz] Fig. 3. Playback equalizer amplifier block diagram Fig. 4. Playback equalizer amplifier frequency response The CXA2511AQ achieves the frequency response of Fig.4 with the circuit configuration shown in Fig. 3. Two systems (FORWARD and REVERSE) of playback head input are provided for each channel. The FORWARD input pin is selected when DRSW (Pin 19) is Low; REVERSE is selected when DRSW is High. The playback equalizer amplifier frequency response can be set in two levels. When TAPESW (Pin 18) is Low, SW2 shown in Fig. 3 is turned OFF; when TAPESW is High, SW2 is turned ON. The external resistance R1 should be adjusted to adjust the playback equalizer amplifier gain. The playback equalizer amplifier frequency response is all determined by the external resistance and capacitance, and it can be obtained with the following equation. G (s) = R1 + R2 * R1 1 + {s * C1 * (R1 * R2 + R2 * Rx + Rx * R1) / (R1 + R2)} (s = j) 1 + s * C1 * (R2 + Rx) Where, Rx = R3 when TAPESW pin =Low; Rx = R3//R4 when TAPESW pin = High Using the above equation, G1 in Fig. 3 and low-frequency time constant (T1) and high-frequency time constants (T2 and T3) are as follows: G1 = 20log R1 + R2 R1 T1 = C1 * (R2 + Rx) T2, T3 = C1 * (R1 * R2 + R2 * Rx + Rx * R1) R1 + R2 - 15 - CXA2511AQ 4. Music sensor TAPEIN2 MSLPF Vcc x1 R3 127k R2 10k AMP1 R4 100k VGS x1 DGND DGND AMP2 R5 39.1k R6 1k R7 11.1k C1 64p Vcc R11 DVcc Full-wave rectifier R1 10k Smoother AMP3 MSOUT DGND TAPEIN1 G1FB C2 R8 G2FB C3 R9 MSTC R10 C4 Fig. 5. Music sensor block diagram The signal input from TAPEIN is added and amplified by AMP1. This signal is then input to the LPF (R4 and C1). The LPF cut-off frequency can be adjusted by connecting the external capacitance to MSLPF pin. The cut-off frequency is approximately 23kHz when MSLPF pin is left open. The detection level and HPF cut-off frequency are determined with the external resistance and capacitance connected to G1FB or G2FB at AMP2, and the signal is converted to a current. The signal is full-wave rectified and is converted to a voltage by the internal resistance R5. The full-wave rectified signal is smoothed. The internal resistance (R6) and external capacitance (C4) determine the smoothing response time. The recovery time is determined by the external resistance (R10) and capacitance (C4). The AMP3 comparator detects whether the smoothed signal is greater or smaller than the comparator threshold. The comparator has approximately 2dB hysteresis. The table below shows the example of the constant and characteristics for the external resistance and capacitance connected to G1FB and G2FB. R FF/REW (G1) Playback (G2) C Signal detection level -39.5dBm -59.5dBm Music signal interval detection level -41.4dBm -61.4dBm Cut-off frequency 870Hz 87Hz 39k 0.0047F 3.9k 0.47F Detection level (dBm) -39.5 -59.5 G1 (FF) G2 (NOR) 87 870 Frequency [Hz] Fig. 6. Music sensor circuit frequency response - 16 - CXA2511AQ 5. Operating mode control method The CXA2511AQ has a Dolby NR mode select switch (NRMODE), Dolby NR switch (NRSW), playback equalizer amplifier select switch (TAPESW), head input select switch (DRSW), music sensor mode select switch (MSMODE) and music sensor switch (MSSW). The operating modes for each switch are shown in the following table. Pin No. 15 16 17 18 19 20 21 NRMODE NRSW INSW TAPESW DRSW MSMODE MSSW Pin name Low (OPEN) Dolby B type NR Dolby NR OFF TAPE 120s PBIN FORWARD G1 MS ON Pin voltage High Dolby C type NR Dolby NR ON AUX 70s PBIN REVERSE G2 MS OFF Notes on Operation 1. Dolby NR Dolby NR functions by using the current that flows into DIREF (Pin 25) as standard. The Dolby NR attack/recovery time is determined by the capacitance connected to TCH (Pins 8 and 23) and TCL (Pins 9 and 22). Use the parts connected to these pins with high accuracy and small temperature characteristics. (It is recommended that the resistance tolerance of 2% - 17 - CXA2511AQ Example of Representative Characteristics Current consumption vs. Supply voltage Ta = 25C Current consumption [mA] 20 19 No input signal NR OFF, MS ON 18 7.0 8.0 9.0 10.0 11.0 Supply voltage [V] Playback equalizer amplifier frequency response PBFIN1 60 Ta = 25C 47 680 50 70s Gain [dB] PBFB1 PBREF 40 120s 30 VCC = 8.0V Output level of -25dBm constant 100 1k Frequency [Hz] 70s 270 10k PBREF 0.01 PBEQ1 18k 12k 300k PBOUT1 2.2 Fig. 7. Measurement circuit of playback equalizer amplifier frequency response B type decode boost characteristics 12 VCC = 8.0V 0dB = Dolby Level -40dB 20 C type decode boost characteristics VCC = 8.0V 0dB = Dolby Level -60dB -50dB -40dB 8 4 0 -4 Ta = 25C 100 1k Frequency [Hz] -10dB 0dB 10k -30dB -20dB Decode boost [dB] 8 6 4 2 0 100 1k Frequency [Hz] Ta = 25C Decode boost [dB] 10 16 12 -30dB -20dB -10dB 0dB 10k - 18 - CXA2511AQ Total harmonic distortion (playback equalizer amplifier) VCC = 8.0V VCC = 8.0V Input: PBFIN1 Input: PBFIN1 Output: PBOUT1 Output: PBOUT1 RL = 2.7k RL = 2.7k Ta = 25C 100 Total harmonic distortion [%] 10-1 f = 10kHz 10-2 f = 100Hz f = 1kHz -20 -16 -12 -8 -4 0 4 8 Output level [dBm] B type total harmonic distortion (including NR OFF) Input: TAPEIN1 Input: TAPEIN1 Ouptut: LINEOUT1 Ouptut: LINEOUT1 VCC ==8.0V VCC 8.0V RL ==2.7k RL 2.7k 0dB ==Dolby Level 0dB Dolby Level Ta = 25C C type total harmonic distortion Input: TAPEIN1 Input: TAPEIN1 Output: LINEOUT1 101 Output: LINEOUT1 VCC = 8.0V VCC = 8.0V RL = 2.7k RL = 2.7k 0dB = Dolby Level 0dB = Dolby Level Ta = 25C 100 Total harmonic distortion [%] Total harmonic distortion [%] NR C f = 10kHz 100 10-1 NR B f = 1kHz NR B f = 100Hz NR C f = 100Hz 10-2 NR B f = 10kHz NR OFF f = 1kHz 10-1 NR C f = 1kHz -10 -6 -2 2 6 10 14 -10 -6 -2 2 6 10 14 Output level [dBm] Output level [dBm] - 19 - CXA2511AQ Ripple rejection ratio (PBOUT) VCC = 8.0V RL = 2.7k Ta = 25C -20 Ripple rejection ratio (LINEOUT) VCC = 8.0V RL = 2.7k Ta = 25C Ripple rejection ratio [dB] Ripple rejection ratio [dB] -40 -30 NR OFF -40 -50 NR B -60 100 1k Frequency [Hz] 10k -50 NR C 100 1k Frequency [Hz] 10k Crosstalk between channels (1ch 2ch) 0 -20 VCC = 8.0V Input: PBFIN1 Output: LINEOUT2 (LINEOUT1 output level = 0dBm) NR OFF 47 680 PBOUT1 PBEQ1 PBREF 12k 300k -120 100 1k Frequency [Hz] 10k 270 PBREF 2.2 PBFIN1 24dB Crosstalk [dB] -40 -60 -80 -100 TAPEIN1 LINEOUT1 Fig. 8. Measurement circuit of crosstalk between channels Music signal and signal interval detection level frequency response -0 -10 Ta = 25C VCC = 8.0V Input: TAPEIN1 G1: R = 39k, C = 4.7nF G2: R = 3.9k, C = 0.47F HPF connection resistance in MS block vs. Music signal and signal interval detection level characteristics VCC = 8.0V f = 5kHz Input: TAPEIN1 Ta = 25C -30 Input level [dBm] -20 -30 -40 -50 -60 Input level [dBm] Music signal detection level G1 Music signal interval detection level Music signal detection level G2 Music signal interval detection level 100 1k Frequency [Hz] 10k -40 Music signal detection level Music signal interval detection level -60 -70 -50 1k 10k HPF connection resistance [] 100k - 20 - CXA2511AQ Package Outline Unit: mm 40PIN QFP (PLASTIC) 9.0 0.4 + 0.4 7.0 - 0.1 30 21 + 0.35 1.5 - 0.15 + 0.1 0.127 - 0.05 0.1 31 20 A 40 11 1 0.65 + 0.15 0.1 - 0.1 + 0.15 0.3 - 0.1 10 0.12 M 0.5 0.2 (8.0) PACKAGE STRUCTURE PACKAGE MATERIAL LEAD TREATMENT LEAD MATERIAL PACKAGE WEIGHT EPOXY RESIN SOLDER / PALLADIUM PLATING COPPER / 42 ALLOY 0.2g DETAIL A SONY CODE EIAJ CODE JEDEC CODE QFP-40P-L01 QFP040-P-0707 NOTE : PALLADIUM PLATING This product uses S-PdPPF (Sony Spec.-Palladium Pre-Plated Lead Frame). - 21 - |
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