BA3308(14SOP) [UTC]
Audio Preamplifier, 2 Func, PDSO14;
| 型号： | BA3308(14SOP) |
| 厂家： | 
Unisonic Technologies |
| 描述： | Audio Preamplifier, 2 Func, PDSO14 光电二极管 |
| 文件： | 总8页 (文件大小：126K) |
| 中文： | 中文翻译 | 下载： | 下载PDF数据表文档文件 |
UTC BA3308
LINEAR INTEGRATED CIRCUIT
DUAL PREAMPLIFIER WITH ALC
DESCRIPTION
The UTC BA3308 is designed to have dual preamplifier
ICs with built – in ALC circuits for use in stereo amplification.
The preamplifiers have high gain and low distortion. A built-in
rectifier for ALC circuit implies good channel balance and
large dynamic range can be constructed with addition of just
an external time constant circuit.
SIP-9
FEATURES
* Wide operating power supply voltage range
(VCC =6.0V ~ 14V)
SOP-14
* Power-on mute circuit to avoid “pop” noise generation.
* No input coupling capacitors are necessary
* High gain (GVO=80dB)and low noise (VNIN=1µVrms)
* Low distortion (THD=0.1%)
*Pb-free plating product number: BA3308L
* Good ALC channel balance with built-in ALC rectifier diode
* Adjustable ALC dynamic range by external input resistor.
BLOCK DIAGRAM
SIP-9
MUTE
-
-
ch2
+
ch1
+
ALC
9
NF2
4
1
2
3
5
6
7
8
NF1
Vcc
INPUT1 OUTPUT1 GND
ALC
OUTPUT2 INPUT2
SOP-14
OUTPUT1
GND
1
2
3
4
5
6
7
14 N.C.
INPUT1
12 N.C.
+
-
13
N.C.
ALC
ALC
11
10
9
NF1
-
VCC
NF2
Vcc
+
N.C.
INPUT2
OUTPUT2
8
N.C.
UTC UNISONIC TECHNOLOGIES CO., LTD.
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QW-R107-015,A
UTC BA3308
LINEAR INTEGRATED CIRCUIT
ABSOLUTE MAXIMUM RATINGS
(Ta = 25℃)
PARAMETER
SYMBOL
VCC
RATINGS
16
UNIT
V
Power Supply Voltage
SIP-9
SOP-14
950 *1
Power Dissipation
PD
mW
450 *2
℃
℃
Operating Temperature
Storage Temperature
TOPR
TSTG
0 ~ +70
-65 ~ +125
*1 Reduced by 9.5mW for each increase in Ta of 1°C over 25°C.
*2 Reduced by 4.5mW for each increase in Ta of 1°C over 25°C.
(when mounted on a 70mm ×70mm ×1.6mm glass epoxy board)
RECOMMENDED OPERATING CONDITIONS
(Ta = 25℃)
+6.0V ~ +14V ( Ta = 25~ +75℃ )
+4.5V ~ +14V ( Ta = 0~ +75℃ )
Power supply voltagerange 1
Power supply voltagerange 2
* When it is used below Ta = 0℃, please use it within the range of operating power supply voltage1.
ELECTRICAL CHARACTERISTICS
(Ta =25℃, VCC =7.0V, f =1kHz and BPF: 20Hz ~ 20kHz, unless otherwise noted.)
PARAMETER
SYMBOL
VOM
TEST CONDITIONS
THD=1%
MIN
0.6
TYP
1.2
MAX
2.0
UNIT
Maximum output voltage
Vrms
Conversion with Rg=2.2kΩ and
NAB34dB at 1kHz
Input conversion noise voltage
VNIN
1.0
µVrms
Quiescent current
IQ
VIN =0Vrms
1.5
15
3.3
31.5
0.1
80
4.5
45
mA
kΩ
%
Input resistance
RIN
Total harmonic distortion
Open loop voltage gain
THD
GVO
NAB34dB, VOUT =40mVrms
VOUT = −10dBV
0.3
70
40
dB
RG =3.9kΩ, VIN =−70dBV
reference, THD=3%
VIN = −60dBV, −30dBV
VO =0dBV, NAB34dB
ALC range
ALC
70
dB
ALC channel balance
Channel separation
∆ALC
0
2.5
dB
dB
CS
60
75
UTC UNISONIC TECHNOLOGIES CO., LTD.
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QW-R107-015,A
UTC BA3308
LINEAR INTEGRATED CIRCUIT
APPLICATION CIRCUIT
MUTE
-
-
ch2
+
ch1
+
ALC
R8
220ꢀ
9
4
1
2
3
5
6
7
8
R5
18kꢀ
+
+
R7
1Mꢀ
Vcc
7V
C7
22μF
C8
330μF
R6
18kꢀ
R1
3.9Kꢀ
+
+
R3
39ꢀ
R4
39ꢀ
R2
3.9kꢀ
C5
10μF
C6
+
+
+
+
C3
C1
10μF
C2
10μF
C4
10μF
100μF
100μF
INPUT2
OUTPUT2
INPUT1 OUTPUT1
R9 (R10)
120kꢀ
R11(R12)
4.3kꢀ
For playback,instead of R5 and R6,connect
the following NAB time constant circuit
between pins 1 and 3 and 7 and 9.
C9 (R10)
0.027μF
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QW-R107-015,A
UTC BA3308
LINEAR INTEGRATED CIRCUIT
TOTAL APPLICATION CIRCUIT
220Ω
9V
1000μF
+
+
330μF
L
RA
CA
Cc
0.027μF
+
33μF
120kΩ 4.3kΩ
18kΩ
+
100μF
47μF
120Ω
470μF
+
+
7
10kΩ
10kΩ
+
10μF
+
4
SP
3Ω
2.2μF
1
2
8
1
5
6
3
UTC
3.9kΩ
3
6
2.2ꢀ
2
+
MIC
RADIO
etc.
CB
CB
UTC
BA5406
0.22μF
3.9kΩ
2.2μF
BA3308
11
7
10
+
5
+
+
8
4
9
+
SP
3Ω
9
12
+
10μF
47μF
470μF
2.2Ω
120Ω
+
+
33μF
47μF
0.22μF
18kΩ
39Ω
+
100μF
120kΩ4.3kΩ
L
RA
CA
0.027μF
BIAS
OSC
Cc
Notes:
(1) Switches are in the playback positions.
(2) Set the values of RA and CA depending on the characteristics of the playback/recording head.
(3) The capacitor CB is for head resonance treble compensation during playback, and prevention of high-frequency noise.
The recommended value is about 1000pF.
(4) L and CC are a bias trap.
UTC UNISONIC TECHNOLOGIES CO., LTD.
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QW-R107-015,A
UTC BA3308
LINEAR INTEGRATED CIRCUIT
ch2
(ch1)
Cont
ch2
(ch1)
+
-
ch1
(ch2)
2 (8)
1 (9)
3 (7)
5
R5(R6)
18kꢀ
+
R1(R1)
3.9kꢀ
C7(C8)
22μF
R7(R8)
1Mꢀ
+
R3(R4)
39ꢀ
C5(C6)
10μF
+
C1(C2)
10μF
+
C3(C4)
100μF
INPUT
OUTPUT
Fig.1
ch1
(ch2)
+
-
ch2
(ch1)
ch2
(ch1)
+
Comp
-
Cont
4.5VF
VOUT (DC+AC)
3VF
3 (7)
5
2 (8)
+
R1
(R2)
R7
C7
Fig.2
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QW-R107-015,A
UTC BA3308
LINEAR INTEGRATED CIRCUIT
+
A1
-
2 (8)
1 (9)
3 (7)
5
R11(R12)
R9(R10)
4.3kꢀ
120kꢀ
R3(R4)
39ꢀ
+
C5(C6)
10μF
+
C1(C2)
10μF
C9(C10)
0.027μF
+
C3(C4)
100μF
OUTPUT
INPUT
Fig.3
OPERATION NOTES
The UTC BA3308 has a built-in power-on mute circuit to prevent generation of a “pop” sound when the power is
applied. The generation of the “pop” sound is prevented by the DC blocking capacitors C3 and C4 connected to pins 1
and 9, and the charge time required for the ripple filter capacitor C8 that is connected to pin 6.
To ensure correct operation of this circuit, use the values given in the application circuit for C3, C4, R3, R4, C8 and
R8.
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QW-R107-015,A
UTC BA3308
LINEAR INTEGRATED CIRCUIT
ELECTRICAL CHARACTERISTIC CURVES
Fig.5 Quiescent current vs.ambient temperature
Fig.4 Quiescent current vs.power supply voltage
16
12
VCC=7V
14
12
10
8
10
8
6
6
4
4
2
2
0
0
-50
0
2
4
6
8
10
12
14
16
-25
0
25
50
75
100
POWER SUPPLY VOLTAGE , Vcc (V)
AMBIENT TEMPERATURE, Ta (℃)
Fig.6 Voltage gain vs. power supply voltage
Fig.7 Closed loop voltage gain vs. ambient
temperature
120
100
90
80
70
60
50
40
30
20
VOUT=300mVrms
f=1kHz
RL=10Kꢀ
Vcc=7V
VOUT=300mVrms
f=1kHz
100
80
RL=10kꢀ
60
40
20
0
R5, R6=18kꢀ
R5, R6=6.8kꢀ
-25
50
100
-50
0
25
75
0
2
4
6
8
10
12
14
16
AMBIENT TEMPERATURE, Ta (℃)
POWER SUPPLY VOLTAGE, Vcc (V)
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QW-R107-015,A
UTC BA3308
LINEAR INTEGRATED CIRCUIT
Fig.8 ALC characteristics
Fig.9 Input/output characteristics
10
10
60
40
20
0
Vcc=7V
f=1kHz
Gv=52dB
VOUT
8
6
1
ch2
VOUT
4
2
0
0.1
ch1
Vcc=7V
f=1kHz
Gv=52dB
RL=10kΩ
-20
-40
0.01
-80
-70
-60
INPUT VOLTAGE, VIN (dBV)
-20
-50
-40
-30
-80
-60
-0
INPUT VOLTAGE, VIN (dBV)
-40
-20
20
Fig.10 Maximum output voltage vs. power
supply voltage
Fig.11 Maximum output voltage vs. load
resistance
1.6
1.4
1.2
1
2
f=1kHz
THD=1%
RL=10kΩ
Vcc=7V
f=1kHz
THD=1%
1.8
1.6
1.4
1.2
1
0.8
0.6
0.4
0.2
0
0.8
0.6
0.4
0.2
0
10k
100
1k
0
2
4
6
8
10
12
14
16
LOAD RESISTANCE, RL (ꢀ )
POWER SUPPLY VOLTAGE, Vcc (V)
UTC assumes no responsibility for equipment failures that result from using products at values that
exceed, even momentarily, rated values (such as maximum ratings, operating condition ranges, or
other parameters) listed in products specifications of any and all UTC products described or contained
herein. UTC products are not designed for use in life support appliances, devices or systems where
malfunction of these products can be reasonably expected to result in personal injury. Reproduction in
whole or in part is prohibited without the prior written consent of the copyright owner. The information
presented in this document does not form part of any quotation or contract, is believed to be accurate
and reliable and may be changed without notice.
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QW-R107-015,A
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