UNISONIC TECHNOLOGIES CO., LTD
LAG665F
IC FOR HEADPHONE
STEREOS
DESCRIPTION
LINEAR INTEGRATED CIRCUIT
The LAG665 is a monolithic integrated circuit, designed for
was 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-Chip stereo tape recorder with motor speed controller.
*Operating supply voltage range: V
CC
=2~5V
*Good volume control
ORDERING INFORMATION
Ordering Number
LAG665FG-S28-R
Package
SOP-28
Packing
Tape Reel
MARKING
www.unisonic.com.tw
Copyright © 2015 Unisonic Technologies Co., Ltd
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QW-R11-013.B
LAG665F
PIN CONFIGURATION
VB
PRE
1 IN+
1 IN-
1 NF
PRF
1 OUT
PRE
ATT1
CON
VOL
V
REF
1 OUT
P
GND
P
V
BP
GND
MD
V
CON
MO
ON
1
2
3
4
5
6
7
8
9
10
11
12
13
14
LINEAR INTEGRATED CIRCUIT
28
27
26
25
24
23
22
21
20
19
18
17
16
15
GND
PRE
2 IN+
2 IN-
2 NF
PRE
2 OUT
PRE
ATT 2
PRE
OFF
V
CCPRE
V
CC
2 OUT
P
MO
OFF
V
CCMO
CON
T
CON
S
PIN FUNCTION DESCRIPTIONS
PIN NO.
1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
SYMBOL
VB
PRE
1 IN+
1 IN -
1 NF
PRE
1 OUT
PRE
ATT 1
CON
VOL
V
REF
1 OUT
P
GND
P
V
BP
GND
MD
V
CON
MO
ON
CON
S
CON
T
V
CCMO
MO
OFF
2 OUT
P
V
CC
V
CCPRE
PRE
OFF
ATT 2
2 OUT
PRE
2 NF
PRE
2 IN-
2 IN+
GND
PRE
DESCRIPTION
Pre Amp Bias Voltage
Channel 1 “+” Input
Channel 1 “-” Input
Feedback 1
Pre Amp Output 1
Attenuator 1
Volume Control
Reference Voltage
Power Amp Output 1
Power GND
Power Amp Bias Voltage
Motor GND
Motor Control Voltage
Motor Forced Start
Speed Control
Torqul Control
Motor Power Control
Motor Forced Stop
Power Amp Output 2
Supply Voltage
Supply Voltage
Pre Amp Off
Attenuator 2
Pre Amp Output 2
Feedback 2
Channel 2 “-” Input
Channel 2 “+” Input
Pre GND
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QW-R11-013.B
UNISONIC TECHNOLOGIES CO., LTD
www.unisonic.com.tw
LAG665F
LINEAR INTEGRATED CIRCUIT
BLOCK DIAGRAM
27
26
25
24
23
22
21
19
20
14
17
16
15
13
Power Amp
Pre Amp
Attenuator
Motor
Control
1/2 Vcc
Bias
Control
1/2 Vcc
V/I
Power Amp
Pre Amp
Attenuator
Power
Amp
1
2
3
28
4
5
6
7
8
9
11
10
18
12
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QW-R11-013.B
LAG665F
PARAMETER
LINEAR INTEGRATED CIRCUIT
ABSOLUTE MAXIMUM RATINGS
(T
A
=25°C, unless otherwise specified)
SYMBOL
VALUE
UNIT
Supply Voltage
V
CC
-0.3~+7.5
V
Power Dissipation
P
D
450
mW
Operating Voltage
V
OP
2~5
V
Operating Temperature
T
OPR
-20~+65
C
Storage Temperature
T
STG
-40~+125
C
Note: Absolute maximum ratings are those values beyond which the device could be permanently damaged.
Absolute maximum ratings are stress ratings only and functional device operation is not implied.
ELECTRICAL CHARACTERISTICS
(V
CC
=6V,T
A
=25C, unless otherwise specified)
SYMBOL
I
CC
G
VO
G
VC
V
OM
THD
V
ON
TEST CONDITIONS
V
IN
=0V, I
M
=0mA
V
O
=-10dBm, R
L
=
V
O
=-10dBm
THD=10%
V
OUT
=400mV
Rms
V
IN
=0, R
G
=2.2k,
BPF(30~20kHz)
V
OUT
=-10dBm
R
G
=2.2k, V
OUT
=-10dBm
V
IN
=100mV
Rms
MIN
TYP
18
72
42
0.6
0.05
150
18
30
22
-50
10
10
0.2
66
15
100
P
OUT
=5mW
V
CONT
=Max
THD=10%, R
L
=32Ω
THD=10%, R
L
=16Ω
P
OUT
=5mW
P
OUT
=5mW
R
G
=2.2k, V
CONT
=Min
V
CC
=3V, 100Hz, 100mVp-p
V
IN
=0V, R
G
=2.2k, V
CONT
=Max
26
20
30
20
34
0
20
MAX
25
UNIT
mA
dB
dB
V
RMS
%
μV
RMS
kΩ
dB
dB
kΩ
KΩ
V
RMS
dB
dB
kΩ
kΩ
30
3
dB
dB
mW
mW
%
dB
mV
RMS
dB
mV
RMS
PARAMETER
Supply Current
PRE-AMPLIFIER (V
CC
=3.0V, f=1kHz)
Open Loop Gain
Close Loop Gain
Maximum Output Voltage
Total Harmonic Distortion
Output Noise Voltage
40
0.45
44
0.5
300
Input Impedance
Z
IN
Cross Talk between CH
CT
Output Voltage when Pre-Off
V
O_OFF
Output Impedance when Pre-Off
R
O_OFF
Input Impedance when Pre-Off
R
I_OFF
Attenuator (V
CC
=3.0V, f=1kHz, R
L
=16Ω)
Maximum Input Voltage
V
I_MAX
Maximum Attenuation
V
A_MAX
Attenuation Error
V
AERR
Input Impedance
Z
IA
Control Ternimal Input Impedance
Z
ICOT
Power Amplifier (V
CC
=3.0V, f=1kHz, R
L
=16Ω)
Voltage Gain
GV
Channel Voltage Difference
GV
Maximum Output Power I
P
OM
1
Maximum Output Power II
P
OM
2
Total Harmonic Distortion
THD
Cross Talk between CH
C
T
Output Noise Voltage
V
ON
Ripple Rejection
RR
Pre + Pulse Boost + Power Noise
V
NTO
V
CONT
=Min
V
CONT
=Max
28
0
28
0.2
30
0.25
40
6
2
1.0
9
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4 of 8
QW-R11-013.B
LAG665F
LINEAR INTEGRATED CIRCUIT
ELECTRICAL CHARACTERISTICS
(V
CC
=6V,T
A
=25C, unless otherwise specified)
MIN
TYP
3
500
0.72
0.8
0.05
0.01
0.01
38
0.5
0.05
0.02
5.6
200
33
MAX
5
0.87
UNIT
mA
mA
V
%/V
%/mA
%/C
%/V
%/mA
%/C
V
KΩ
μA
KΩ
PARAMETER
SYMBOL
TEST CONDITIONS
Motor Comtrol (V
CC
=3V, I
M
=100mA)
Current Consumption
IMC
Starting Current
IMS
Reference Voltage
V
REF
Pin 15~Pin 16
Reference Voltage Change I
V
REF
1
V
CC
=2.1~5V (Note)
Reference Voltage Change II
V
REF
2
I
M
=25~250mA
Reference Voltage Change III
V
REF
3
T
A
=-10~50C
Current Factor
K
Current Factor Change I
K1
V
CC
=2.1~5V
Current Factor Change II
K2
I
M
=25~250mA
Current Factor Change III
K3
T
A
=-10~50C
Saturation Voltage at Forced ON
V
CESA
I
M
=200mA, Pin 14=V
CC
Input Impedance at Forced ON Pin
R
ION
Leakage Current at Forced OFF
IML
Input Impedance at Forced OFF Pin
R
ICON
Note: Voltage across pins 13 and 19 (motor pins) fluctuates.
32
43
0.6
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www.unisonic.com.tw
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QW-R11-013.B
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