MM1124

MITSUMI Bass Amplifier MM1124 Bass Amplifier Monolithic IC MM1124 Outline This IC was developed to boost bass on TV and free-standing VCR decks, etc. The recent trend toward large-screen TV and movie software has increased the demand for powerful bass and wider sound, so that the bass boost function has become part of TV and VCR functions. This IC was designed especially for bass, and easily reproduces a powerful sound. Features 1. Dynamic bass boost Boost can be adjusted higher for lower sound, and smaller for bigger sound. 2. Boost switching pin Boost amount can be switched for music and video software, giving a change to the set 3. High range boost By boosting the high range as well, a more realistic sound is reproduced 4. Boost attack circuit Gives quick response and follows sudden volume changes Package SOP-16B (MM1124AF, MM1124BF, MM1124CF) DIP-16B (MM1124AD, MM1124BD) Series Table Model name MM1124A MM1124B MM1124C Boost FULL 19dB 12dB 8dB 1/2 14dB 8dB 4dB Boost start input level +3dBm +3dBm -14dBm Note 1 : Boost amounts for are input level of -37.8dBm Note 2 : The above are reference values, and may vary depending on the specifications. Absolute Maximum Ratings Item Storage temperature Operating temperature Power supply voltage Operating voltage Allowable loss (Ta=25°C) Symbol TSTG TOPR VCC max. VCC Pd Ratings -40~+125 -20~+70 -0.3~+15 +5~+12 350 (SOP-16B) 1200 (DIP-16B) Units °C °C V V mW MITSUMI Bass Amplifier MM1124 Electrical Characteristics Item Consumption current Voltage gain (Ta=25°C) Measurement conditions SW FULL Through A FULL FULL FULL 1/2 1/2 1/2 FULL 1/2 Through FULL FULL FULL Through A B C FULL Through FULL Through FULL Through FULL 1k 1k 1k -7.8 -7.8 -7.8 0 1.2 2.5 1/2 Through Superimpose VR=0dB (100Hz, 100mVrms) on VCC and measure output pin B C A B C f (Hz) 1k 1k 100 100 100 100 100 100 1k 1k 1k 1k THD=10% VIN=0V, 30kHzLPF Rg=10kΩ VIN (dBm) -7.8 -7.8 -37.8 -37.8 -37.8 -37.8 -37.8 -37.8 -7.8 -7.8 -7.8 -7.8 1.8 -1 17 10 6 Min. Typ. Max. Units 6.6 0 19 12 8 9.0 +1 21 14 10 mA dB dB dB dB dB dB dB % % % dB Vrms 500 50 -26 -42 -30 -42 -34 -48 0.3 1.6 9 µVrms µVrms dB dB dB dB dB dB V V V Rank Boost 1 (Bst1) Bst1-6 Bst1-5 Bst1-4 Bst1-5 Bst1-4 Bst1-3 Bst1-5 Bst1-4 Bst1-3 0.1 0.1 0.03 -50 2.4 250 25 -32 -48 -36 -48 -42 -56 0.3 0.3 0.1 -44 Boost 2 Total harmonic distortion ratio Crosstalk Maximum output voltage Output noise voltage Ripple rejection rate SW pin voltage range Note : No rank indication means common rank MITSUMI Bass Amplifier MM1124 Block Diagram/ Application Circuits Characteristics Boost amount-Input level (rank A) Boost amount (dB) 20 15 10 5 0 -5 -10 -50 -40 -30 -20 -10 0 10 SW:FULL SW:1/2 Input level (dB) Output level-Frequency (rank A) SW : FULL Output level (dBm) 10 0 -10 -20 -30 -40 101 102 103 104 105 -2.2dBm -7.8dBm -37.8dBm Frequency (Hz) MITSUMI Bass Amplifier MM1124 Boost amount-Input level (rank B) Boost amount (dB) 20 15 10 5 0 -5 -10 -50 -40 -30 -20 -10 0 10 SW:1/2 SW:FULL Input level (dB) Output level-Frequency (rank B) SW : FULL Output level (dBm) 10 0 -10 -20 -30 -40 101 102 103 104 105 -2.2dBm -7.8dBm -37.8dBm Frequency (Hz) Boost amount-Input level (rank C) Boost amount (dB) 20 15 10 5 0 -5 -10 -50 -40 -30 -20 -10 0 10 SW:1/2 SW:FULL Input level (dB) Output level-Frequency (rank C) SW : FULL Output level (dBm) 10 0 -10 -20 -30 -40 101 102 103 104 -2.2dBm -7.8dBm -37.8dBm 105 Frequency (Hz) MITSUMI Bass Amplifier MM1124 THROUGH distortion rate characteristics (VCC=9V, f=1kHz) 101 (%) 100 10-1 10-2 -30 -20 -10 0 10 Input level (dBm) CH Crosstalk -30 (dB) -40 -50 -60 -70 101 102 103 104 Rank A Rank B Rank C 105 Frequency (Hz)