Q Surround Processor MM1454 MITSUMI Q Surround Processor Monolithic IC MM1454 Outline This is an analog IC virtual surround processor that faithfully reproduces the sound algorithm developed by Q SOUND Labs, Inc. In particular, when a stereo signal (L/Rch) encoded by Dolby Pro Logic is input to this IC, a virtual rear speaker is created spatially, and this allows reproduction of realistic, 3-dimensional sound from two speakers, without the addition of another speaker. Q Xpander technology allows deep, spatially wide sound for input of normal stereo signals, as well. * Virtual Dolby sound is a system developed by Dolby Labs, Inc. that reproduces realistic Pro Logic sound with just two front left and right speakers, so there is no need for the additional two rear speakers and center speaker normally required for Pro Logic sound. * Dolby and Dolby Surround are registered trademarks of Dolby Laboratory Licensing Corporation. * The Q Surround virtual processor (MM1454) was developed by Mitsumi Electric, and has not received the certification or authorization of Dolby Laboratory. * Mitsumi Electric has no business ties or other relationship with Dolby Laboratory. Features 1. Virtual rear speakers allow reproduction of 3-dimensional sound through only two speakers when a Pro Logic encoded source is input. 2. Also reproduces wide sound for a normal stereo source. 3. 2ch input - 2ch output. 4. Few external parts due to use of the active filter created using Mitsumi's bipolar technology. 5. Low noise design Q Surround ON: 15µVrms OFF: 10µVrms 6. Simple structure results in small size and low cost. Package SOP-16B Applications 1. TV, VCR 2. Audio equipment 3. Computer monitors 4. Active speaker systems Absolute Maximum Ratings (Ta=25°C) Item Storage Temperature Operating Temperature Power Supply Voltage Input Voltage Output Voltage Allowable loss Symbol TSTG TOPR VCC max. VIN max. IO max. Pd Rating -40~+125 -20~+75 13 0 =< VIN =< VCC 10 350 Unit °C °C V V mA mW Q Surround Processor MM1454 MITSUMI Recommended Operating Conditions Item Symbol Rating Unit Operating temperature TOPR -20~+75 °C Operating voltage VOP 4.5~12.0 V Power supply fall times *7 TVOFF 0.1~1.0 S Electrical Characteristics (Except where noted otherwise, VCC=9V, Ta=25°C, Vbyp=5V, SW1,2,3: A) Item Current consumption Voltage gain Q Surround 1 Voltage gain Q Surround 2 Voltage gain Q Surround 3 Voltage gain Q Surround 4 Symbol ICC Gqs1 Gqs2 Gqs3 Gqs4 Voltage gain bias 1 Gby1 Voltage gain bias 2 Gby2 Input voltage amplitude (1) Input voltage amplitude (2) Total higher harmonic distortion Q Surround VIN1 VIN2 THDqs Total higher harmonic distortion bias THDby Output noise voltage Q Surround Vnoqs Output noise voltage bias Vnoby R-L channel balance Cb B/Q pin voltage (H) B/Q pin voltage (L) B/Q pin voltage (H) B/Q pin voltage (L) DET pin voltage (H) DET pin voltage (L) Input resistance Power supply voltage removal rate Q Surround Power supply voltage removal rate bias Vbyph Vbyp1 Ibyph Ibyp1 Vdeth Vdetl RIN PSRRqx PSRRby Crosstalk (1) Ct1 Crosstalk (2) Ct2 Measurement Conditions SG1 : 0.75Vrms, 1kHz SW2 : B SG1 : 0.75Vrms, 1kHz SW2 : B SG2 : 0.75Vrms, 1kHz SW3 : B SG2 : 0.75Vrms, 1kHz SW3 : B SG1 : 0.75Vrms, 1kHz SW2 : B SG2 : 0.75Vrms, 1kHz SW3 : B VCC=9V *1 SW2, 3 : B VCC=9V *2 SW2, 3 : B (a) SG1 : 0.75Vrms, 1kHz SW2 : B (b) SG2 : 0.75Vrms, 1kHz SW3 : B (a) SG1 : 0.75Vrms, 1kHz SW2 : B (b) SG2 : 0.75Vrms, 1kHz SW3 : B Vbyp=0V BW=20~20kHz, A Curve BW=20~20kHz, A Curve Vbyp=0V SG1, SG2 : 0.75Vrms, 1kHz Vbyp=0V SW2, 3 : B *3 *4 *5 Vbyp=5V *6 Vbyp=0V *7 *7 TP1 TP2 TP2 TP1 Vbyp=0V TP1 Vbyp=0V TP2 TP1, TP2 TP1, TP2 Min. Typ. Max. Unit 16 22 mA 8.5 9.5 10.5 dB 4.0 5.0 6.0 dB 8.5 9.5 10.5 dB 4.0 5.0 6.0 dB -1 0 1 dB -1 0 1 dB 0.75 0.35 0.9 0.45 TP1, TP2 TP1, TP2 TP1, TP2 TP1, TP2 TP1, TP2 -1.0 Vrms Vrms 0.1 0.3 % 0.03 0.15 % 15 35 µVrms 10 25 µVrms 0 1.0 dB 2.1 TP5 TP5 TP6 TP6 TP3, TP4 SG3 : 100mVrms, 100Hz SW1 : B TP1, TP2 SG3 : 100mVrms, 100Hz SW1 : B Vbyp=0V TP1, TP2 SG1 : 0.75Vrms, 1kHz SW2 : B TP1, TP2 *8 Vbyp=0V SG2 : 0.75Vrms, 1kHz SW3 : B TP1, TP2 *9 Vbyp=0V 30 0.7 39 V V µA µA V V kΩ -80 -65 dB -85 -70 dB -85 -70 dB -85 -70 dB 0.7 350 -1 8.5 21 Q Surround Processor MM1454 MITSUMI Note 1: *1 Note 2: *2 Note 3: Note 4: Note 5: Note 6: Note 7: *3 *4 *5 *6 *7 Input voltage amplitude when output total higher harmonic distortion is 1%. However, the signals input to SG1 and SG2 must be the same phase (phase difference 0 degrees). Input voltage amplitude when f = 1kHz and output total higher harmonic distortion is 1%. However, the signals input to SG1 and SG2 must be reverse phase (phase difference 180 degrees). Voltage when B/Q pin (Pin 3) is considered to be H (Q Surround mode). Voltage when B/Q pin (Pin 3) is considered to be L (by pass mode). Current that flows in to B/Q pin (Pin 3) when Vbyp = 5V. Current that flows out of B/Q pin (Pin 3) when Vbyp = 0V. The mute signal for turning off the power amp power supply is output to Pin 4. On this IC, it is recommended that the pop noise generated during power supply fall be muted by turning off the power amp connected to the final stage of MM1454 before turning off the IC power supply. Tvoff VCC=9V VCC waveform (16PIN) 0V Vdeth DET pin waveform (4PIN) Vdet 1 Note 8: *8 Defined as the ratio between Pin 6 output signal and Pin 7 output signal when a signal is input to SG1. Note 9: *9 Defined as the ratio between Pin 7 output signal and Pin 6 output signal when a signal is input to SG2. Block Diagram Q Surround Processor MM1454 MITSUMI Application Circuit Tolerance ±1% *12 Resistor Capacitor Tolerance ±5% *3 The mute signal which switches off the power supply of a power amplifier that is connected with MM1454 * appears in the 4 terminal. (NOTE 7) 4 The pop noise which occurs in a moment of the power supply switching on is reduced by connecting the *capacitor (10uF) between 2PIN and GND. But if the reduced pop noise cause trouble for your application, we recommend muting the pop noise by the power amplifier that is connected with MM1454. 5 SW1: A QSurround Mode SW2: B Bypass Mode * Characteristics 15.0 14.0 13.0 12.0 11.0 10.0 9.0 8.0 7.0 6.0 5.0 4.0 3.0 2.0 1.0 0. 10.0 Voltage gain (dB) Voltage gain (dB) 1. LIN-ROUT (RIN-LOUT) Frequency (Q Surround) 2. LIN-ROUT (RIN-ROUT) Frequency (Q Surround) 100.0 1.0k 10.0k Frequency (Hz) 100.0k 10.0 8.0 6.0 4.0 2.0 0. -2.0 -4.0 -6.0 -8.0 -10.0 10.0 100.0 1.0k 10.0k Frequency (Hz) 100.0k Q Surround Processor MM1454 MITSUMI 3. THD of output signal - Input voltage (LIN) (QSrround) 4. THD of output signal - Input voltage (RIN) (QSrround) f=1kHz, RIN=0Vrms 1 LIN-ROUT 0.1 LIN-LOUT 0.01 0.01 0.1 1 f=1kHz, RIN=0Vrms 10 THD(%) THD(%) 10 1 RIN-ROUT 0.1 RIN-LOUT 0.01 0.01 10 Input Voltage (Vrms) 0.1 1 10 Input Voltage (Vrms) THD(%) 10 1 ROUT 0.1 LOUT 0.01 0.01 0.1 1 10 Input Voltage (Vrms) Input Voltage (2)VIN2 (Vrms) 0.7 0.6 0.5 0.4 0.3 0.2 0.1 0 5 10 Power supply voltage VCC (V) See Electrical Characteristics Note 2 1.2 1 0.8 0.6 0.4 0.2 0 0 5 10 Power supply voltage VCC (V) See Electrical Characteristics Note 1 7. Input voltage (2) - Power supply voltage (QSrround) 0 Input Voltage (1) VIN1(Vrms) 5. THD of output signal - Input voltage (QSrround) 6. Input voltage (1) - Power supply voltage (QSrround) f=1kHz, The signals that are inputted in LIN and RIN are out out of phase and same amplitude. 15 15