UNISONIC TECHNOLOGIES CO., LTD
BA3308
Preliminary
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
(V
CC
=4.5V ~ 14V)
* Power-on mute circuit to avoid “pop” noise generation.
* No input coupling capacitors are necessary
* High gain (G
VO
=80dB)and low noise (V
NIN
=1µVrms)
* Low distortion (THD=0.1%)
* Good ALC channel balance with built-in ALC rectifier diode
* Adjustable ALC dynamic range by external input resistor.
SOP- 14
ORDERING INFORMATION
Ordering Number
Lead Free
BA3308L-G09-T
BA3308L-S14-R
BA3308L-S14-T
Halogen Free
BA3308G-G09-T
BA3308G-S14-R
BA3308G-S14-T
Package
SIP-9
SOP-14
SOP-14
Packing
Tube
Tape Reel
Tube
www.unisonic.com.tw
Copyright © 2011 Unisonic Technologies Co., Ltd
1 of 4
QW-R107-015.Ba
BA3308
BLOCK DIAGRAM
Preliminary
LINEAR INTEGRATED CIRCUIT
SIP-9
SOP-14
UNISONIC TECHNOLOGIES CO., LTD
www.unisonic.com.tw
2 of 4
QW-R107-015.Ba
BA3308
PARAMETER
Power Supply Voltage
Power Dissipation
Derating above
Ta = 25℃
Preliminary
LINEAR INTEGRATED CIRCUIT
ABSOLUTE MAXIMUM RATING
(Ta = 25℃)
SYMBOL
V
CC
SIP-9
SOP-14
SIP-9
SOP-14
P
D
T
OPR
T
STG
RATINGS
16
950
450
9.5
4.5
0 ~ +85
-65 ~ +125
UNIT
V
mW
℃/mW
℃
℃
Operating Temperature
Storage Temperature
RECOMMENDED OPERATING CONDITIONS
(Ta = 25℃)
PARAMETER
SYMBOL
Power Supply Voltage
V
CC
Note: This IC is not designed to be radiation-resistant.
RATINGS
+4.5~ +14
UNIT
V
ELECTRICAL CHARACTERISTICS
(Ta =25℃, V
CC
=7.0V, f =1kHz and BPF: 20Hz ~ 20kHz, unless otherwise noted.)
PARAMETER
SYMBOL
TEST CONDITIONS
Maximum Output Voltage
V
OM
THD=1%
Conversion with R
g
=2.2kΩ and
Input Conversion Noise Voltage
V
NIN
NAB34dB at 1kHz
Quiescent Current
I
Q
V
IN
=0Vrms
Input Resistance
R
IN
Total Harmonic Distortion
THD
NAB34dB, V
OUT
=40mV
rms
Open Loop Voltage Gain
G
VO
V
OUT
=
−10dBV
R
G
=3.9kΩ, V
IN
=−70dBV
ALC Range
ALC
reference, THD=3%
ALC Channel Balance
∆ALC
V
IN
=
−60dBV, −30dBV
Channel Separation
CS
V
O
=0dBV, NAB34dB
MIN
0.6
TYP
1.2
1.0
1.5
15
70
40
60
3.3
31.5
0.1
80
70
0
75
2.5
MAX
2.0
4.5
45
0.3
UNIT
V
rms
μV
rms
mA
kΩ
%
dB
dB
dB
dB
UNISONIC TECHNOLOGIES CO., LTD
www.unisonic.com.tw
3 of 4
QW-R107-015.Ba
BA3308
Preliminary
LINEAR INTEGRATED CIRCUIT
TYPICAL APPLICATION CIRCUIT
MUTE
-
ch1
+
-
ch2
+
ALC
1
R5
18kΩ
R3
39Ω
C3
100μF
+
R1
3.9KΩ
2
3
4
R7
1MΩ
C5
10μF
5
+
C7
22μF
6
+
7
C8
330μF +
C6
10μF
8
9
R8
220Ω
Vcc
7V
R4
39Ω
+
+ C1
10μF
R2
3.9kΩ
R6
18kΩ
+
C2
10μF
+
C4
100μF
INPUT1 OUTPUT1
OUTPUT2 INPUT2
R9 (R10)
R11(R12) 120kΩ
4.3kΩ
For playback,instead of R
5
and R
6
,connect
the following NAB time constant circuit
between pins 1 and 3 and 7 and 9.
C9 (C10)
0.027μF
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.
UNISONIC TECHNOLOGIES CO., LTD
www.unisonic.com.tw
4 of 4
QW-R107-015.Ba
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