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
T
STG
T
OPR
V
CC
max.
V
CC
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
V
CC
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%
V
IN
=0V, 30kHzLPF
Rg=10kΩ
V
IN
(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
10
1
10
2
10
3
10
4
10
5
-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
10
1
10
2
10
3
10
4
10
5
-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
10
1
10
2
10
3
10
4
-2.2dBm
-7.8dBm
-37.8dBm
10
5
Frequency (Hz)