MITSUMI
IC for Headphone Stereos MM1104
IC for Headphone Stereos
Monolithic IC MM1104
Outline
August 6, 1994
This IC was developed for use in 3 V headphone stereos. It incorporates all the basic functions of tape
players.
Mitsumi has previously offered the LAG665, LAG668, LAG673 and MM1006 as one-chip versions. However,
this IC is the result of a through review and redesign extending to circuit details.
Features
1. Configuration: Pre-and power amp, motor control
2. Adoption of shock noise prevention circuitry
Through the use of a circuit which suppresses noise occurring when the power supply is turned on and off,
noise output is reduced without muting.
3. Stable motor speed control circuit
A bridge circuit employing power transistors provides motor speed control with minimal drift.
4. Preamp off pin is convenient for radio connections
5. Radiation pin: When radio wave-induced noise is a problem, this pin can be used to cut the frequency
characteristic.
Package
SOP-28B (MM1104AF, MM1104BF, MM1104CF)
Pin Assignment
1
2
3
4
5
28 27 26 25 24 23 22 21 20 19 18 17 16 15
6
7
1 2 3 4 5 6 7 8 9 10 11 12 13 14
SOP-28B
8
9
10
11
12
13
14
1/2V
CC
Pre
IN
1
NFB1
PreOUT1
Pre Off
Power
IN
1
Radiation1
PowerOUT1
GND
Governor V
CC
N.C
PCOUT
GND
Governor GND
15
16
17
18
19
20
21
22
23
24
25
26
27
28
N.C
Speed
Phase
V
S
PowerOUT2
Amp V
CC
Filter
Radiation2
Power
IN
2
N.C
PreOUT2
NFB2
Pre
IN
2
Amp GND
MITSUMI
IC for Headphone Stereos MM1104
Absolute Maximum Ratings
Item
Operating temperature
Storage temperature
Power supply current
Power consumption
Operating voltage
Symbol
T
OPR
T
STG
V
CC
Pd
Vop
Ratings
-20~+65
-40~+125
-0.3~+7.5
700 (Ta=25
°
C)
+2.0~+5.0
Units
°
C
°
C
V
mW
V
Electrical Characteristics
(Except where noted otherwise, Ta=25
°
C)
Item
Symbol
Measurement conditions
Min. Typ.
Consumption current
I
CC
Amp. only
11
Preamp unit (Ta=25
°
C)
Open-circuit gain
GVo
Vo=-10dBm f=100Hz
86
Closed-circuit gain
GVc
Vo=-10dBm
42
Maximum output voltage
Vom
THD=10%
0.5 0.74
Total harmonic distortion ratio
THD
Vo=-10dBm
0.06
Output noise voltage
Vno
Rg=2.2kΩ, CCIR waiting
240
Crosstalk between channels
CH
CT
Vo=-10dBm
45
60
Ripple rejection
RR
V
CC
=3V, V
R
=-20dBm, f
R
=100Hz
30
42
Output voltage with preamp off
VoOff
Vo=-10dBm, when pre operation
-100
Input resistance with preamp off
RiOff
7
10
Output resistance with preamp off
RoOff
7
10
Measurement conditions: Except where noted otherwise, V
CC
=3V, Rg=2.2kΩ, R
L
=30kΩ, f=1kHz
Power amp unit (Ta=25
°
C)
Input resistance
Ri
14
20
Voltage gain
Gv
Po=5mW
32
34
Voltage gain difference between channels
Gv
0
Maximum output power
I
Pom1
THD=10%, R
L
=16Ω
40
62
Maximum output power
II
Pom2
THD=10%, R
L
=32Ω
20
34
Total harmonic distortion ratio
THD
Po=5mW
0.4
Crosstalk between channels
CH
CT
Po=5mW
45
62
Output noise voltage
Vn
Rg=1kΩ, CCIR waiting
150
Ripple rejection
RR
V
CC
=3V, V
R
=-20dBm, f
R
=100Hz
40
50
Measurement conditions: Except where noted otherwise, V
CC
=3V, Rg=1kΩ, R
L
=16Ω, f=1kHz
Motor governor (Ta=25
°
C)
Consumption current
Id
A
2
measured
2.0
Startup current
I
MS
I
M
measured when R
V
=1.5Ω
500
Reference voltage
Vref
V5 measured with SW12 off
0.09 0.10
VS fluctuation for
Reference voltage fluctuation
I
Vref1
0.1
V
CC
=1.5 to 3.5V, V
CC
=3.0V ref.
VS fluctuation for
0.005
Reference voltage fluctuation
II
Vref2
I
M
=25 to 200m A, I
M
=100mA ref.
VS fluctuation for
Reference voltage fluctuation
III
Vref3
0.01
Ta=-10 to 60
°
C, Ta=25
°
C ref.
Reference voltage V8 measured
0.2
Output saturation voltage
VoSAT
I
M
=200mA with SW12 on
Bridge ratio
K
V7/V6 measured
9
10
Max. Units
18
mA
dB
dB
Vrms
0.5
%
500 µVrms
dB
dB
-70 dBm
13
kΩ
13
kΩ
26
36
2
2
300
kΩ
dB
dB
mW
mW
%
dB
µVrms
dB
7.0
0.11
0.5
mA
mA
V
%/V
0.05 %/mA
%/
°
C
0.3
11
V
MITSUMI
IC for Headphone Stereos MM1104
Measurement conditions
Min. Typ. Max.
K fluctuation for
Bridge ratio fluctuation
I
K1
0.1
0.2
V
CC
=1.5 to 3.5V, V
CC
=3.0V ref.
K fluctuation for
0.05 0.2
Bridge ratio fluctuation
II
K2
I
M
=25 to 200m A, I
M
=100mA ref.
K fluctuation for
Bridge ratio fluctuation
III
K3
0.01
Ta=-10 to 60
°
C, Ta=25
°
C ref.
Measurement conditions: Except where noted otherwise, V
CC
=3V, IM=100mA, SW11=OFF, SW12=ON
Item
Symbol
Units
%/V
%/mA
%/
°
C
Block Diagram
(Example of Application Circuits)
Characteristics
Preamp
Total harmonic distortion ratio (%)
Total harmonic distortion ratio (%)
10
THD-P
OUT
V
CC
=1.8V
V
CC
=2.0V
V
CC
=3.0V
1.0
R
L
=30kΩ
f=1kHz
0.1
10
Power amp
THD-V
OUT
1.0
V
CC
=1.8V
V
CC
=2.0V
V
CC
=3.0V
R
L
=16Ω
f=1kHz
0.1
0.01
10
100
1k
10k
0.01
10
100
1k
10k
Output voltage (mVrms)
Output voltage (mVrms)
MITSUMI
IC for Headphone Stereos MM1104
Power amp
Ripple rejection rate (dB)
Voltage gain-frequecy
40
60
50
40
30
20
10
0
0
Pre+power amp
Ripple rejection rate-volume knob attenuation
Gain (dB)
30
20
10
-10
-20
-30
-40
1k
10k
100k
1M
10M
Frequency (Hz)
Attenuation at VR (dB)
N-T characteristic
Motor frequency (rpm)
3000
2500
2000
1500
1000
500
0
2
4
6
8
10 12 14 16 18
V
CC
=1.8V
V
CC
=2.0V
V
CC
=3.0V
Torque (g · cm)
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