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. 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 VCC 12 –40 to +85 –65 to +150 430 V °C °C mW 7.8 to 11 V Applications • Car stereo cassette decks • Playback-only cassette decks ∗ 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 PBEQ2 PBOUT2 GND TAPEIN2 AUXIN2 DIREF LINEOUT2 TCH2 TCL2 MSSW Block Diagram and Pin Configuration 30 29 28 27 26 25 24 23 22 21 NR PBFB2 31 120µ/70µ 20 MSMODE OFF/ B/C 19 DRSW PBRIN2 32 ×1 T2 MS MODE NR BIAS PBREF2 33 18 TAPESW F2 TAPE/AUX PBFIN2 34 17 INSW TAPE EQ VCT 35 NR MODE VCT 16 NRSW FWD/RVS PBGND 36 15 NRMODE VCC MS ON/ OFF LPF PBFIN1 37 DET 14 MSOUT F1 PBREF1 38 ×1 F3 13 DGND T1 PBRIN1 39 12 MSTC OFF/ B/C PBFB1 40 120µ/70µ 11 G1FB 1 2 3 4 5 6 7 8 9 10 PBEQ1 PBOUT1 VCC TAPEIN1 AUXIN1 MSLPF LINEOUT1 TCH1 TCL1 G2FB NR –2– CXA2511AQ Pin Description Pin No. Symbol (Ta = 25°C, VCC = 8.0V, DVCC = 5.0V) Typical pin voltage DC AC I/O I/O resistance Equivalent circuit Description Vcc 40k 1 30 PBEQ1 PBEQ2 1k 4.0V — O — Resistance for selecting the playback equalizer amplifier time constant 5k 1 1k 30 GND Vcc 2 29 PBOUT1 PBOUT2 Playback equalizer amplifier output 200 4.0V –25dBm O — 2 29 200 GND 3 VCC 8.0V — — — Power supply Vcc 4 27 TAPEIN1 TAPEIN2 TAPE input 4.0V –30dBm 4 I 40kΩ 5 5 26 147 20p 27 AUXIN1 AUXIN2 40k 26 External input VGS GND Vcc Cut-off frequency adjustment of the music sensor LPF 100k 6 MSLPF 4.0V — — 100kΩ 6 147 64p GND –3– CXA2511AQ Pin No. Symbol Typical pin voltage DC I/O AC I/O resistance Equivalent circuit Description Vcc 7 24 LINEOUT1 LINEOUT2 4.0V –6dBm O 147 — 200 Line output 7 22.5k 200 24 GND Vcc 8 23 TCH1 TCH2 36k 0.3V — — — Time constant for the HLS 147 8 23 330k GND Vcc 13.5k 9 22 TCL1 TCL2 0.3V — — — Time constant for the LLS 147 9 22 480k GND Vcc 10 11 G2FB G1FB Music signal interval detection level setting 500 4.0V — — — 147 10 11 500 GND 13 DGND 0.0V — — Logic ground (Connect to GND.) — –4– CXA2511AQ Pin No. Symbol Typical pin voltage DC I/O AC I/O resistance Equivalent circuit Description Vcc 12 MSTC — — — 147 — Time constant for detecting the music signal interval 853 12 10k DGND GND Vcc 14 MSOUT 0.2V when a signal is detected; DVcc when no signal is detected DVcc 100k — O — DGND 15 17 GND Vcc NRMODE INSW Music sensor output 147 14 0.0V when open 15 — I 100kΩ Line amplifier input select control Low (open): TAPEIN High: AUXIN 1.1k 17 21 100k DGND 21 16 18 MSSW GND Vcc NRSW TAPESW 0.0V when open 16 — I 100kΩ 100k DGND 19 DRSW GND –5– 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): 120µs High: 70µs 1.1k 18 19 Dolby NR mode control Low (open): Dolby B type NR High: Dolby C type NR Head select control Low (open): FORWARD High: REVERSE CXA2511AQ Pin No. Symbol Typical pin voltage DC I/O AC I/O resistance Equivalent circuit Description Vcc 20 MSMODE 0.0V when open Music sensor mode control Low (open): G1 High: G2 1.1k — I 100kΩ 20 100k DGND GND Vcc 25 DIREF 1.2V — — Resistance for setting the Dolby NR reference current (Connects 20kΩ between DIREF pin and GND for the standard setting.) 147 — 25 GND 28 GND 0.0V — — — Ground 31 40 PBFB2 PBFB1 4.0V –70dBm I — Playback equalizer amplifier feedback 32 39 PBRIN2 PBRIN1 Vcc 32 34 4.0V 34 37 31 39 –70dBm I 50p 50p 40 Playback equalizer amplifier input (REVERSE head connected) 36 — PBREF PBREF GND PBFIN2 PBFIN1 –6– Playback equalizer amplifier input (FORWARD head connected) CXA2511AQ Pin No. Symbol Typical pin voltage DC I/O AC I/O resistance Equivalent circuit Description Vcc 33 38 PBREF2 PBREF1 Playback equalizer amplifier reference (Vcc/2 output) 200 4.0V — O — 33 38 200 GND Vcc 30k 147 35 VCT 4.0V — O — VGS ×1 35 Center (Vcc/2 output) 45k 30k GND 36 PBGND 0.0V — — Playback equalizer amplifier ground (Connect to ground.) — –7– CXA2511AQ Electrical Characteristics Item (Ta = 25°C, VCC = 8.0V. DVCC = 5.0V) Symbol Operating voltage Vopr Current consumption ICC Measurement conditions No signal, NR OFF, TAPE, 120µs, MS ON Min. Typ. Max. Unit 7.8 8.0 11.0 V 13.0 19.2 25.0 mA Dolby NR (0dB = Dolby level LINEOUT of –6dBm) TAPEIN input sensitivity VTIN TAPEIN 1kHz, LINEOUT 0dB, NR OFF –32.0 –30.0 –28.0 dBm AUXIN input sensitivity VAUX AUXIN 1kHz, LINEOUT 0dB –32.0 –30.0 –28.0 dBm B type decode boost characteristics 1 BP1 TAPEIN 500Hz, LINEOUT –25dB, NR B 1.4 2.9 4.4 dB B type decode boost characteristics 2 BP2 TAPEIN 2kHz, LINEOUT –25dB, NR B 5.5 7.0 8.5 dB B type decode boost characteristics 3 BP3 TAPEIN 5kHz, LINEOUT –25dB, NR B 3.9 5.4 6.9 dB B type decode boost characteristics 4 BP4 TAPEIN 10kHz, LINEOUT –40dB, NR B 9.7 10.4 11.9 dB B type decode boost characteristics 5 BP5 TAPEIN 10kHz, LINEOUT 0dB, NR B –1.1 0.4 1.9 dB C type decode boost characteristics 1 CP1 TAPEIN 500Hz, LINEOUT –60dB, NR C 14.2 16.2 18.2 dB C type decode boost characteristics 2 CP2 TAPEIN 500Hz, LINEOUT –25dB, NR C 7.2 9.2 11.2 dB C type decode boost characteristics 3 CP3 TAPEIN 2kHz, LINEOUT –60dB, NR C 18.7 20.7 22.7 dB C type decode boost characteristics 4 CP4 TAPEIN 2kHz, LINEOUT –25dB, NR C 5.4 7.4 9.4 dB C type decode boost characteristics 5 CP5 TAPEIN 5kHz, LINEOUT –25dB, NR C 3.5 5.5 7.5 dB C type decode boost characteristics 6 CP6 TAPEIN 10kHz, LINEOUT 0dB, NR C –5.5 –3.5 –1.5 dB Total harmonic distortion 1 THD1 TAPEIN 1kHz –20dBm, NR OFF, RL = 2.7kΩ — 0.01 0.2 % Total harmonic distortion 2 THD2 TAPEIN 1kHz –20dBm, NR B, RL = 2.7kΩ — 0.04 0.2 % Total harmonic distortion 3 THD3 TAPEIN 1kHz –20dBm, NR C, RL = 2.7kΩ — 0.05 0.3 % Decode S/N ratio 1 SN1 No signal, NR B, Rg = 5.1kΩ, CCIR/ARM filter used 77.0 87.0 — dB Decode S/N ratio 2 SN2 No signal, NR C, Rg = 5.1kΩ, CCIR/ARM filter used 80.0 82.0 — dB Signal handling SH1 TAPEIN 1kHz, NR OFF, RL = 2.7kΩ, THD = 1% 13.0 14.4 — dB Crosstalk between channels 1 CT1 TAPEIN 1kHz –24dBm, NR OFF, 1kHz BPF used — –86.0 –70.0 dB Crosstalk between channels 2 CT2 AUXIN 1kHz –24dBm, 1kHz BPF used — –86.0 –70.0 dB –8– CXA2511AQ Item Symbol Measurement conditions Min. Crosstalk between TAPE and AUX CT3 TAPE (AUX) IN 1kHz –24dBm, NR OFF, AUX (TAPE) mode, 1kHz BPF used ∗1 Output DC offset voltage VOS1 No signal, NR OFF, difference from VCT –0.1 — Max. Unit –67.0 –65.0 dB Typ. 0.0 0.1 V Playback Equalizer Amplifier Playback equalizer amplifier reference output level PBREF PBIN 315Hz –70dBm, 120µs mode –27.0 –25.0 –23.0 dBm Playback equalizer amplifier frequency response 1 F120 PBIN 2.7kHz –58.5dBm, 120µs mode at 315Hz –1.5 0.0 1.5 dB Playback equalizer amplifier frequency response 2 F70 PBIN 4.5kHz –53.8dBm, 70µs mode at 315Hz –1.5 0.0 1.5 dB Signal handling SH2 PBIN 1kHz, 120µs mode, RL = 2.7kΩ, THD = 1% –10.0 –3.0 — dBm PBIN 1kHz –52dBm, 120µs mode, RL = 2.7kΩ — 0.07 0.5 % No signal, 70µs mode, Rg = 680Ω, CCIR/ARM filter used 59.0 64.5 — dB Output DC offset voltage VOS2 No signal, 120µs mode, Rg = 680Ω, difference from VCT –1.0 0.0 1.0 V Crosstalk between channels CT4 PBIN 1kHz –52dBm, 120µs mode, 1kHz BPF used — –81.0 –70.0 dB Crosstalk between CT5 FORWARD and REVERSE PBIN 1kHz –52dBm, 120µs mode, 1kHz BPF used — –80.0 –70.0 dB Total harmonic distortion THD4 S/N ratio SN3 Music Sensor Signal detection level 1 VMS1 TAPEIN 5kHz, MS ON, G1 mode, external constant of 39kΩ and 0.0047µF –43.0 –40.0 –37.0 dBm Signal detection level 2 VMS2 TAPEIN 5kHz, MS ON, G2 mode, external constant of 3.9kΩ and 0.47µF –63.0 –60.0 –57.0 dBm MS output leak current IOH No signal, MS OFF, G1 mode — 0.0 1.0 µA MS output saturation voltage VOL TAPEIN 5kHz –30dBm, MS ON, G1 mode, 1mA applied to MSOUT pin — 0.3 1.0 V Low level VIL Input voltage of NRMODE, NRSW, INSW, TAPESW, DRSW, MSMODE, MSSW 0.0 — 0.5 V High level VIH Input voltage of NRMODE, NRSW, INSW, TAPESW, DRSW, MSMODE, MSSW 2.5 — DVCC V Logic Voltage ∗1 The crosstalk between TAPE and AUX is measured with a 5.1kΩ 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 S4 S3 C4 ∗ R8 2.2µ 680 27 26 25 24 23 22 AUXIN2 DIREF LINEOUT2 TCH2 TCL2 DRSW 19 TAPESW 18 37 PBFIN1 ∗ R7 680 ∗ R36 50k S24 OFF: 0dB ON: 30dB S29 DRSW H/L “A” WTG S28 TAPESW H/L INSW H/L DIN Audio S27 NRSW H/L NRMODE H/L R24 100k 1kHz BPF S26 +20dB DVCC R30 10k S18 CCIR/ARM MSTC 12 ∗ ∗ TCH1 TCL1 G2FB MSLPF 6 7 C15 C16 270p 2.2µ 8 9 10 AC Voltmeter R25 1MEG G1FB 11 R20 2.7k ∗ C13 1µ S25 +20dB C24 0.1µ ∗ R22 3.9k ∗ R23 39k C18 C20 C22 0.1µ 0.068µ 0.47µ C23 4.7n Distortion Analyzer Oscilloscope S12 5 4 C11 1µ R17 5.1k 3 S11 2 ∗ R11 C8 18k 2.2µ S8 R15 5.1k ∗ R5 12k C10 22µ ∗ R1 300k AUXIN1 1 40 PBFB1 C6 0.01µ LINEOUT1 39 PBRIN1 TAPEIN1 DGND 13 VCC 38 PBREF1 S7 ∗ R6 680 PBOUT1 ∗ R2 270 DC Voltmeter MSMODE H/L MSOUT 14 R13 2.7k S1 C1 2.2µ NRMODE 15 PBEQ1 GND NRSW 16 S5 S2 DC Ammeter A INSW 17 36 PBGND C2 2.2µ S19 GND GND MSMODE 20 35 VCT C3 22µ S20 R31 10k 21 34 PBFIN2 VCC S21 R32 100 MSSW H/L MSSW 28 32 PBRIN2 ∗ R9 680 33 PBREF2 Power Supply S22 R33 10k S13 R18 5.1k 29 TAPEIN2 C5 2.2µ 30 31 PBFB2 ∗ R3 270 C21 0.068µ C17 2.2µ GND C7 0.01µ C19 0.1µ ∗ ∗∗ R19 20k PBOUT2 ∗ R4 300k Audio SG ∗ C14 1µ C12 1µ C9 2.2µ R21 2.7k ∗R12 18k S23 0dB or 30dB Amp PBEQ2 ∗R10 12k R16 5.1k S10 S8 S6 ∗ R14 2.7k R35 10k R34 100 Note R29 10k S17 R28 100 S16 R27 10k S15 R26 100 S14 1. Resistor tolerance 2. Capacitor tolerance Coupling Capacitor – 10 – ±5% ∗ : ±1% ±5% ∗ : ±2% ±10% CXA2511AQ Application Circuit 1 PBFB2 RVS2 R6 180 R4 100k PBRIN2 PBREF2 29 28 26 27 25 GND C17 0.1µ C19 0.068µ 23 24 MSSW C15 2.2µ AUXIN2 R15 20k LINEOUT2 C12 2.2µ TAPEIN2 GND PBEQ2 30 C4 470p C10 2.2µ PBOUT2 R9 18k DIREF R11 12k C7 0.01µ LINEOUT2 GND GND TCL2 AUXIN2 TCH2 GND R12 R14 300k 33k 22 21 NR 31 120µ/70µ 20 OFF/ B/C 19 32 T2 ×1 MSMODE DRSW From Microcomputer MS MODE NR BIAS 33 18 TAPESW F2 PBRIN1 PBFB1 37 DET MS ON/ OFF 14 F1 38 F3 ×1 13 T1 39 12 OFF/ B/C 40 120µ/70µ R8 18k C6 0.01µ 2 PBOUT1 PBEQ1 1 R10 12k 5 4 3 C9 2.2µ 6 7 C11 C13 C14 2.2µ 0.001µ 2.2µ R7 R13 300k 33k AUXIN1 VCC 11 NR 9 8 C16 C18 0.1µ 0.068µ GND GND LINEOUT1 INSW NRSW NRMODE R19 MSOUT 100k DGND MSTC DVCC To Microcomputer DGND C22 0.1µ GND G1FB R18 1MEG 10 G2FB R5 180 LPF TCL1 C1 470p 15 VCC MSLPF RVS1 FWD/RVS 36 AUXIN1 PBREF1 16 NR MODE TAPEIN1 PBFIN1 FWD1 R1 100k TAPE EQ 35 VCT PBGND 17 TCH1 VCT TAPE/AUX 34 VCC C3 R3 470p 100k GND C5 22µ GND C2 R2 470p 100k LINEOUT1 PBFIN2 FWD2 R16 3.9k R17 39k C20 0.47µ C21 4.7n GND GND GND C8 22µ 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 PBFB2 MSSW LINEOUT2 AUXIN2 TCL2 23 24 22 120µ/70µ 21 20 OFF/ B/C 19 32 ×1 T2 MSMODE DRSW From Microcomputer MS MODE NR BIAS 33 18 TAPESW R4 100k PBRIN1 PBFB1 TAPE EQ 35 16 NR MODE VCT FWD/RVS 36 15 VCC LPF 37 DET MS ON/ OFF 14 F1 38 ×1 F3 13 T1 39 12 OFF/ B/C 40 120µ/70µ 1 C6 0.01µ PBOUT1 R8 18k 2 R10 12k 5 4 3 C9 2.2µ R7 300k VCC 11 NR 6 7 C11 C13 C14 2.2µ 0.001µ 2.2µ C8 AUXIN1 22µ 9 8 C16 C18 0.1µ 0.068µ GND GND LINEOUT1 INSW NRSW NRMODE R17 MSOUT 100k DGND MSTC DVCC To Microcomputer DGND C22 0.1µ GND G1FB R16 1MEG 10 G2FB R3 100k PBREF1 17 TCL1 PBGND TAPE/AUX 34 TCH1 PBFIN2 PBFIN1 C4 R6 470p 500 25 C19 0.068µ NR 31 PBEQ1 RVS1 26 C17 0.1µ LINEOUT1 C3 470p 27 GND F2 VCT C5 22µ C15 2.2µ MSLPF GND R13 20k AUXIN1 C2 470p GND C12 2.2µ TAPEIN1 R2 100k FWD2 FWD1 PBRIN2 R1 100k PBREF2 28 VCC RVS2 29 GND PBEQ2 30 R5 C1 500 470p C10 2.2µ PBOUT2 R9 18k LINEOUT2 GND GND DIREF R11 12k TAPEIN2 C7 0.01µ GND TCH2 AUXIN2 R12 300k R14 3.9k R15 39k C20 0.47µ C21 4.7n GND GND 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 PB IN NR OFF TAPE AUX 24dB 24dB FWD AMP1 RVS NR AMP2 70µs 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 –6dBm (Dolby level) –10 –20 LINEOUT –30dBm –30 –30dBm –40 PBOUT –50 TAPEIN AUXIN VR adjustment –60 –70 400Hz 200nWb/m: Dolby level reference tape –80 (dBm) PBIN (HEAD) Fig. 2-1. Level diagram (application circuit 1) 0 –10 –6dBm (Dolby level) PBOUT –20 VR adjustment LINEOUT –30dBm –30 –30dBm –40 TAPEIN AUXIN –50 –60 –70 400Hz 200nWb/m: Dolby level reference tape –80 (dBm) PBIN (HEAD) 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 T1 Gain (dB) G1 PB IN FWD SW1 –6dB/oct AMP1 RVS SW2 70µs PBFB T2 PBEQ R4 C1 PBOUT T3 R3 R1 R2 PBREF f1 Fig. 3. Playback equalizer amplifier block diagram f2 f3 Frequency [Hz] 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 = jω) 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 DVcc ×1 R3 127k Vcc C1 64p R2 10k R11 Full-wave rectifier MSOUT Smoother AMP3 AMP1 R1 10k R4 100k AMP2 R5 39.1k VGS R6 1k R7 11.1k DGND ×1 DGND DGND G2FB G1FB TAPEIN1 C2 C3 R8 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 C Signal detection level Music signal interval detection level Cut-off frequency FF/REW (G1) 39kΩ 0.0047µF –39.5dBm –41.4dBm 870Hz Playback (G2) 3.9kΩ –59.5dBm –61.4dBm 87Hz 0.47µF Detection level (dBm) G1 (FF) –39.5 G2 (NOR) –59.5 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. Pin voltage Pin name Low (OPEN) High Dolby B type NR Dolby C type NR 15 NRMODE 16 NRSW Dolby NR OFF Dolby NR ON 17 INSW TAPE AUX 18 TAPESW 120µs 70µs 19 DRSW PBIN FORWARD PBIN REVERSE 20 MSMODE G1 G2 21 MSSW MS ON 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% <metal-oxide> and capacitance tolerance of 10% <film>.) 2. Playback equalizer amplifier All playback equalizer amplifier characteristics are determined by the external constants. Use the parts which satisfies the accuracy required for the playback equalizer amplifier. 3. Music sensor The current on DIREF (Pin 25), and the resistance and capacitance connected to G2FB (Pin 10) and G1FB (Pin 11) determine the detection level and the HPF cut-off frequency. The response time is determined by the resistance and capacitance connected to MSTC (Pin 12). Use the parts which satisfies the accuracy required for the music sensor. – 17 – CXA2511AQ Example of Representative Characteristics Current consumption vs. Supply voltage Current consumption [mA] Ta = 25°C 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 Ta = 25°C 60 47µ 680 70µs PBFB1 PBREF PBEQ1 Gain [dB] 50 40 PBOUT1 18k 0.01µ 120µs 30 VCC = 8.0V Output level of –25dBm constant 12k 70µs 270 100 1k 300k 2.2µ 10k PBREF Frequency [Hz] Fig. 7. Measurement circuit of playback equalizer amplifier frequency response B type decode boost characteristics 10 VCC = 8.0V 0dB = Dolby Level 8 –30dB 6 –20dB 4 2 20 –40dB Ta = 25°C –10dB 0 Decode boost [dB] Decode boost [dB] 12 C type decode boost characteristics 100 1k 10k –50dB 12 –40dB 8 –30dB 4 –20dB 0 –10dB Ta = 25°C 100 Frequency [Hz] –60dB 16 –4 0dB VCC = 8.0V 0dB = Dolby Level 0dB 1k Frequency [Hz] – 18 – 10k CXA2511AQ Total harmonic distortion (playback equalizer amplifier) Total harmonic distortion [%] 100 Ta = 25°C V CC = = 8.0V 8.0V VCC Input: Input: PBFIN1 PBFIN1 Output: Output: PBOUT1 PBOUT1 R RLL == 2.7kΩ 2.7kΩ 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) 10–1 NR B f = 1kHz Input: Input: TAPEIN1 TAPEIN1 Output:LINEOUT1 LINEOUT1 101 Output: VVCC CC==8.0V 8.0V RRLL==2.7kΩ 2.7kΩ 0dB 0dB==Dolby DolbyLevel Level Total harmonic distortion [%] Total harmonic distortion [%] 100 C type total harmonic distortion Ta = 25°C Input: Input: TAPEIN1 TAPEIN1 Ouptut: Ouptut:LINEOUT1 LINEOUT1 VVCC CC==8.0V 8.0V RRLL==2.7kΩ 2.7kΩ 0dB 0dB==Dolby DolbyLevel Level NR B f = 100Hz NR C f = 10kHz 100 NR C f = 100Hz 10–1 NR B f = 10kHz 10–2 Ta = 25°C NR C f = 1kHz NR OFF f = 1kHz –10 –6 –2 2 6 10 14 –10 Output level [dBm] –6 –2 2 6 Output level [dBm] – 19 – 10 14 CXA2511AQ Ripple rejection ratio (LINEOUT) –40 –20 Ta = 25°C VCC = 8.0V RL = 2.7kΩ Ripple rejection ratio [dB] Ripple rejection ratio [dB] Ripple rejection ratio (PBOUT) –50 –60 Ta = 25°C VCC = 8.0V RL = 2.7kΩ –30 NR OFF –40 NR B –50 NR C 100 1k 10k 100 1k Frequency [Hz] 10k Frequency [Hz] 24dB Crosstalk between channels (1ch → 2ch) PBFIN1 0 Crosstalk [dB] –20 –40 VCC = 8.0V Input: PBFIN1 Output: LINEOUT2 (LINEOUT1 output level = 0dBm) NR OFF 47µ 680 PBOUT1 –60 PBEQ1 PBREF TAPEIN1 –80 12k LINEOUT1 2.2µ –100 300k –120 100 1k 270 10k Frequency [Hz] PBREF Fig. 8. Measurement circuit of crosstalk between channels Music signal and signal interval detection level frequency response Input level [dBm] –10 –20 Ta = 25°C VCC CC = 8.0V Input: TAPEIN1 G1: R = 39kΩ, C = 4.7nF G2: R = 3.9kΩ, C = 0.47µF Music signal detection level –30 G1 –40 –50 Music signal interval detection level Music signal detection level G2 –60 –30 Input level [dBm] –0 HPF connection resistance in MS block vs. Music signal and signal interval detection level characteristics Ta = 25°C VCC = 8.0V f = 5kHz Input: TAPEIN1 –40 –50 Music signal detection level Music signal interval detection level –60 Music signal interval detection level 100 1k 10k –70 Frequency [Hz] 1k 10k HPF connection resistance [Ω] – 20 – 100k CXA2511AQ Package Outline Unit: mm 40PIN QFP (PLASTIC) + 0.35 1.5 – 0.15 + 0.1 0.127 – 0.05 9.0 ± 0.4 + 0.4 7.0 – 0.1 0.1 21 30 20 31 A 11 40 1 + 0.15 0.3 – 0.1 0.65 10 ± 0.12 M 0.5 ± 0.2 (8.0) + 0.15 0.1 – 0.1 DETAIL A PACKAGE STRUCTURE PACKAGE MATERIAL EPOXY RESIN SONY CODE QFP-40P-L01 LEAD TREATMENT SOLDER / PALLADIUM PLATING EIAJ CODE ∗QFP040-P-0707 LEAD MATERIAL COPPER / 42 ALLOY PACKAGE WEIGHT 0.2g JEDEC CODE NOTE : PALLADIUM PLATING This product uses S-PdPPF (Sony Spec.-Palladium Pre-Plated Lead Frame). – 21 –