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LAG665 Datasheet

IC for Headphone Stereos Monolithic IC LAG 665


LAG665 Datasheet Preview


MITSUMI
IC for Headphone Stereos
Monolithic IC LAG 665
IC for Headphone Stereos LAG665
Outline
This IC was developed for use in headphone stereos, and incorporates dual preamp, power amp, electronic
VR and motor control circuits. It can be used in a simple circuit configuration which requires very few external
components.
Features
1. Broad operating voltage range of 2.0 to 5.0 V (amp system operates to 1.8 V)
2. Few external components required
1. Internal equalizer resistance
2. Direct coupling of preamps, electronic VR, power amp
3. No need for output coupling capacitor
3. Well-balanced electronic VR, A-curve attenuation characteristic obtained with B-curve VR
4. Internal motor control circuit, with noise from motor driving unit suppressed
5. Provided with pin to turn off preamps
Package
SOP-28B (LAG665F)
SDIP-30A (LAG665D)
Absolute Maximum Ratings
Item
Operating temperature
Storage temperature
Power supply current
Power consumption
Operating voltage
Symbol
Topr
Tstg
VCC
Pd
Vop
Ratings
-20~+65
-40~+125
-0.3~+7.5
450 (SOP-28B)
750 (SDIP-30A)
2.0~5.0
Units
°C
°C
V
mW
V
Page 1

MITSUMI
IC for Headphone Stereos LAG665
Electrical Characteristics (Except where noted otherwise, Ta=25°C)
Item
Symbol Measurement conditions
Min. Typ. Max. Units
Consumption current
ICC
VIN=0V, IM=0mA
18 25
mA
Preamp unit (Ta=25°C)
Open-circuit gain
Gvo Vo=-10dBm, RL=
72 dB
Closed-circuit gain
Gvc
Vo=-10dBm
40 42 44
dB
Maximum output voltage
Vom
THD=10%
0.45 0.6
Vrms
Total harmonic distortion ratio THD
VOUT=400mVrms
0.05 0.5
%
Output noise voltage
Vno VIN=0, Rg=2.2k BPF(30~20kHz)
150 300 µVrms
Input impedance
ZIN
VOUT=-10dBm
18 22
k
Crosstalk between channels C.T
Rg=2.2k, VOUT=-10dBm
30
dB
Output voltage with preamp off Vooff
VIN=100mVrms
-50 dB
Output resistance with preamp off Rooff
10 k
Input resistance on pre off Rioff
10 k
Measurement conditions Unless noted otherwise, VCC=3.0 V, f=1 kHz.
The preamp off pin is left open
Attenuator unit (Ta=25°C)
Maximum input voltage
Vi max.
0.2 Vrms
Maximum attenuation
Va max.
Vcont=min.
66
dB
Attenuation error
Vaerr
Vcont=max.
0 dB
Input impedance
ZIN
15 20
k
Control pin input resistance Zicot
100 k
Measurement conditions Unless noted otherwise, VCC=3.0 V, f=1 kHz, (RL=16).
Power amp unit (Ta=25°C)
Voltage gain Gv POUT=5mW
26 28 30
dB
Voltage gain difference between channels Gv
Vcont=max.
0 3 dB
Maximum output power I Pom1
THD=10%, RL=32
20 28
mW
Maximum output power II Pom2
THD=10%, RL=16
30
mW
Total harmonic distortion ratio THD
POUT=5mW
0.2 2.0
%
Crosstalk between channels C.T
POUT=5mW
20 30
dB
Output noise voltage Vn Rg=2.2k, Vcont=min.
0.25 1.0 mVrms
Ripple rejection
RR VCC=3V, 100Hz, 100mVp-p
34 40
dB
Noise of preamp + power amp Vnto VIN=0V, Rg=2.2k, Vcont=max.
6 9 mVrms
Measurement conditions Unless noted otherwise, VCC=3.0 V, f=1 kHz,(RL=16).
Motor control unit (Ta=25°C)
Consumption current
IMC
3.0 5.0
mA
Startup current
IMS
500 mA
Reference voltage
Vref Between RML-ADJ pins
0.72 0.80 0.87
V
Reference voltage fluctuation I Vref1
Reference voltage fluctuation II Vref2
*VCC between 2.1 and 5.0 V
IM between 25 and 250 mA
0.05 %/V
0.01 %/mA
Reference voltage fluctuation III Vref3 Ta between -10 and 50°C
0.01 %/°C
Current coefficient
K
32 38 43
Current coefficient fluctuation I K1
VCC between 2.1 and 5.0 V
0.5 %/V
Current coefficient fluctuation II K2
IM between 25 and 250 mA
0.05 %/mA
Current coefficient fluctuation III K3
Ta between -10 and 50°C
0.02 %/°C
Output voltage on forced on VCEsa
IM=200mA, 14PIN=VCC
0.6 V
Input resistance on forced on Rion
5.6 k
Leakage current on forced off IML
200 µA
Input resistance on forced off Ricon
33 k
Measurement conditions Unless noted otherwise, VCC=3.0, IM=100 mA, circuit constants as specified.
Motor: M25E-7 (Mitsumi model)
* Voltage across pins 13 and 19 (motor pins) fluctuates.
Page 2

MITSUMI
Block Diagram
IC for Headphone Stereos LAG665
Measuring Circuit
Page 3

MITSUMI
IC for Headphone Stereos LAG665
Switch Matrix
Switch Number
Conditions
Item
1 2 3 4 5 6 7 8 9 10 11
(Except where noted otherwise,
RL=16, VCC=3V, Fosc=1kHz)
Consumption current c c a b b a b b b a a
IM=0mA, VR=max.
Amp unit
Closed-circuit gain
bbb
Vo=-10dBm
Maximum output voltage
THD=10%
Total harmonic distortion ratio
Vo=400mVrms
Output noise voltage c
b
Crosstalk between channels
c
c
b
Measured after inserting BPF (30 Hz to 20 kHz) Preamp unit
VO=-10dBm, measured with channels swapped
using SW1, SW2
Output voltage with preamp off b
a
Maximum input voltage a a a
Maximum attenuation
Voltage gain
Voltage gain difference
between channels
Maximum output power I
ba
Maximum output power II
ab
Total harmonic distortion ratio
c
Crosstalk between channels c a
Output noise voltage
cb
Ripple rejection
ba
b
Pre + power noise
ab
a
Consumption currentt
aa
Startup current
b
Reference voltage
a
Reference voltage fluctuation I
Reference voltage fluctuation II
Output voltage on forced on
a
Leakage current on forced off
b ab
VIN=100mVrms
VIN voltage when VR=mid, THD=10%
Difference in VO output when VR=max and
output voltage when VR=min
POUT=5mW
Attenuator unit
Channel output difference at VR=max
RL=32, THD=10%
RL=16, THD=10%
POUT=5mW
POUT=5mW measured with channels swapped
output voltage when VR=min
VR=min.
VR=max.
VR=max.
IM=0mA
Power amp unit
IM=100mA (15~16PIN)
IM=100mA, VCC=2.1~5.0V (13~17PIN)
Vcc=3.0V, IM=25~250mA
IM=200mA
Motor uni
Note: For switches with only on and off states, a = on and b = off.
Characteristics
Preamp
10.0
THD-VOUT
VCC=1.8V
VCC=2.0V
VCC=3.0V
1.0
0.1
0.01
-30 -20 -10
0
Output voltage (dBm)
Attenuator
0
-20
-40
-60
-80
VATT-VCONT
VCC=3.0V
0/6
(min.)
1/6 2/6 3/6 4/6 5/6 6/6
(max.)
Voltage controllability
(B curve mechanical knob)
Page 4
Part Number LAG665
Manufactur ETC
Description IC for Headphone Stereos Monolithic IC LAG 665
Total Page 5 Pages
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