ETC UTC34119

UTC34119
LINEAR INTEGRATED CIRCUIT
LOW POWER AUDIO AMPLIFIER
DESCRIPTION
The UTC34119 is a low power audio amplifier integrated
circuit intended (primarily) for the telephone applications,
such as in speakerphones. It provides differential speaker
outputs to maximize output swing at low supply voltages.
Coupling Capacitor to the speaker are not required. Open
loop gain is 80dB, and the closed loop gain is set with two
external resistors. A chips Disable pin permits powering
down and/or muting the input signal.
FEATURES
*Wide operating supply voltage: Vcc=2~16V
*Low quiescent supply current(Icc=2.7mA,typical)
*Medium output power
Po=250mW at Vcc=6V,RL=32ohm ,Thd=10%
*Load Impedance range(8 ohms to 100 ohm)
*Low distortion
*Mute function(Icc=65µA, typical)
*Minimum number of external parts required.
DIP-8
BLOCK DIAGRAM
Inverting
Input
NonInverting
Input
4
Amp 1
3
R
6
Bias
2
7
Ripplie
Rejection
GND
Output 1
8
Output 2
1
MUTE
R
Amp 2
Vcc
5
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UTC34119
LINEAR INTEGRATED CIRCUIT
ABSOLUTE MAXIMUM RATINGS(Ta=25°C)
Characteristic
Symbol
Value
Unit
Supply Voltage
Output Current
Maximum input ,ripple
rejection, Mute pin voltage
Applied output voltage(output
pin when disabled)
Junction Temperature
Vcc
Io
Vi(max)
-1.0~+18
±250
-1.0~Vcc+1.0
V
mA
V
Vo
-1.0~Vcc+1.0
V
Tj
-55 ~ +150
°C
PIN DESCRIPTION
Pin No.
Symbol
1
Mute
2
3
Ripple
Rejection
Input(+)
4
input(-)
5
6
7
8
Output 1
Vcc
GND
Output 2
Description
This pin can be used to power down the IC to converse power, or for muting, or
both. When at a logic “LOW”(less than 0.8V), the IC is enabled for normal
operation. When at a logic “HIGH”(2.0V ~Vcc), the IC is disabled. If Mute is open,
that is equivalent to a logic “LOW”.
A capacitor at this pin increase power supply rejection, and affects turn-on time.
This pin can be left open if the capacitor at pin 1 is sufficient.
Analog Ground for the amplifiers. A 1.0F capacitor at this pin (with a 5.0F
capacitor at pin 8) provides 52dB(typical) of power supply rejection. Turn-on time
of the circuit is affected by the capacitor on this pin. This pin can be used as an
alternative input.
Amplifier input. The input capacitor and resistor set low frequency roll-off and input
impedance. The feedback resistor is connected between this pin and output 1.
Amplifier a’s output. The DC level is about (Vcc-0.7V)/2.
DC supply voltage is applied to this pin(Vcc=2.0V ~16.0V)
Ground pin
Amplifier 2’s output. This signal is equal in amplitude, but 180° out of phase with
that t output 1 the DC level is about(Vcc-0.7V)/2.
RECOMMENDED OPERATION CONDITIONS(Ta=25°C)
Characteristics
Symbol
Min
Supply Voltage
Load Impedance
Peak Load Current
Differential Gain(5kHz Bandwidth)
Voltage at Mute
Ambient temperature
Vcc
ZL
IL(peak)
∆GV
Vi(mute)
Ta
2.0
8
0
0
-20
Typ
Max
Unit
16
100
±200
46
Vcc
470
V
Ω
mA
dB
V
°C
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UTC34119
LINEAR INTEGRATED CIRCUIT
ELECTRICAL CHARACTERISTICS
(Ta=25°C,Vcc=6V,unless otherwise specified)
Characteristic
Symbol
Test Conditions
Min
Typ
Max
Units
2.7
3.3
65
4.0
5.0
100
mA
mA
µA
1.15
2.65
5.65
0
Vcc-1.0
0.16
-100
150
25
1.25
V
+30
-200
220
40
mV
V
V
nA
kΩ
0
0.35
DC Characteristics
Operating current
Icc
Output Voltage
Vo
Output Offset Voltage
Output High Level
Output Low Level
Input Bias Current
Equivalent Resistance
Voo
VOH
VOL
Ibias
REQ
AC Characteristics
Open Loop Gain of Amp 1
Open Loop Gain of Amp 2
Po
Total Harmonic Distortion
(f=1.0kHz)
Gain Bandwidth Product
THD
1.0
-30
pin1
pin8
Gv1
Gv2
Output Power
Power Supply rejection
(Vcc=6.0V,∆Vcc=3.0V)
Muting
Vcc=3.0V, Mute=0.8V
Vcc=16.0, Mute=0.8V
Vcc=3.0V,Mute=2.0V
RL=16ΩR1=75kΩ
Vcc=3.0V
Vcc=6.0V
Vcc=12.0V
Vcc=6.0V,Rf=75kΩ,RL=32Ω
2.0V<Vcc<16V,Iout=-75mA
2.0V<Vcc<16V,Iout=75mA
100
18
80
-0.35
55
250
400
f=1.0kHz,RL=32Ω
Vcc=3.0V,RL=6Ω,THD<10%
Vcc=6.0V,RL=32Ω,THD<10%
Vcc=12.0V,RL=100Ω,THD<10%
Vcc=6.0V,RL=32Ω,Po=125mW
Vcc<3.0V,RL=8Ω,Po=20mW
Vcc<12V,RL=32Ω,Po=200mW
dB
dB
mW
0.5
0.5
0.6
1.5
GBW
1.0
%
MHz
50
C1=∞,C2=0.01µF
PSRR
C1=0.1µF,C2=0,f=1kHz,
C1=1.0µF,C2=5.0µF,f=1kHz
Gv(mute) Mute=2.0V,1.0kHz<f<20kHz
12
52
dB
70
dB
TYPICAL APPLICATION CIRCUIT
Vcc
Mute
Rf
Mute
6
1
75kΩ
6
1
4
5
UTC34119
Audio
Input
3
8
3
5
UTC34119
Audio
Input
4
8
3kΩ
2
1µF
7
2
7
0.1µF
5µF
5µF
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Speaker
0.1µF
R1
Speaker
0.1µF
Vcc
UTC34119
LINEAR INTEGRATED CIRCUIT
Vcc
Mute
Vcc
0.001µF
75kΩ
Mute
0.01µF
100kΩ
100kΩ
6
1
6
0.1µF
1
0.1µF
UTC34119
Audio
Input
4
8
3
5
Speaker
5
Speaker
3
UTC34119
Audio
Input
4
0.05µF
8
0.05µF
2
7
2
0.05µF
7
0.05µF
5µF
5.1kΩ
5µF
5.1kΩ
5.1kΩ
5.1kΩ
Vcc
Vcc
75kΩ
1
4.7kΩ
6
Audio
Input
3kΩ
4
5
Speaker
0.1µF
UTC34119
3
Mute
20kΩ
8
Vee
-1.0V ~ -8.0V
7
20kΩ
2
10kΩ
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