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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=25C) 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=25C) 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=10k 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 Vrms Vrms 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)

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