UTC MC34119 LINEAR INTEGRATED CIRCUIT
LOW POWER AUDIO
AMPLIFIER
DESCRIPTION
The UTC MC34119 is a low power audio amplifier
integrated circuit, intended 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 is 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=2V~16V
*Low quiescent supply current( Icc=2.7mA, typ)
*Medium output power( Po=250mW at Vcc=6V,
RL=32ohm, THD=10%)
*Load impedance range(8 to 100ohm)
*Low distortion
*Mute function(Icc=65µA, typ)
*Minimum number of external parts required
SOP-8
DIP-8
BLOCK DIAGRAM
UTC UNISONIC TECHNOLOGIES CO., LTD.
QW-R108-008,A
1
UTC MC34119 LINEAR INTEGRATED CIRCUIT
ABSOLUTE MAXIMUM RATINGS(Ta=25°C )
Supply Voltage Vcc -1 to +18 V
Output Current Io +-250 mA
Maximum Input, Ripple Rejection,
Mute Pin Voltage
Applied Output Voltage( Output Pin
When Disabled)
Junction Temperature Tj -55 to +150
PIN CONFIGURATIONS
PIN NAME DESCRIPTION
1 Mute This pin can be used to power down the IC to converse power, or for muting, or both. When at a
2 Ripple
3 Input(+) Analog Ground for the amplifiers. A 1µF capacitor at this pin ( with a 5µF capacitor at pin 8)
4 Input(-) Amplifier input. The input capacitor and resistor set low frequency roll-off and input impedance.
5 Output 1 Amplifier 1’ s output. The DC level is about (Vcc~0.7V)/2.
6 Vcc DC supply voltage is applied to this pin( Vcc=2~16V).
7 GND Ground pin.
8 Output 2
PARAMETER SYMBOL VALUE UNIT
Vi -1 to +1 V
Vo -1 to +1 V
logic “LOW” (less than 0.8V), the IC is enabled for normal operation. When at a logic “HIGH” (2V to
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
Rejection
left open if the capacitor at pin 1 is sufficient.
provides 52dB( typ) 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.
The feedback resistor is connected between this pin and output 1.
Amplifier 2’ s output. This signal is equal in amplitude, but 180¡ãout of phase with that output 1, the
DC level is about (Vcc~0.7V)/2.
°C
RECOMMENDED OPERATION CONDITIONS(Ta=25°C)
PARAMETER SYMBOL VALUE UNIT
Supply Voltage Vcc 2~16 V
Load Impedance ZL 8~100 Ω
Peak Load Current IL(peak) +-200 mA
Differential Gain(5KHz Bandwidth) ∆Gv 0~46 dB
Voltage at Mute Vi(mute) 0~Vcc V
Ambient Temperature Ta -20~470 °C
UTC UNISONIC TECHNOLOGIES CO., LTD.
QW-R108-008,A
2
UTC MC34119 LINEAR INTEGRATED CIRCUIT
ELECTRICAL CHARACTERISTICS
(Vcc=6V, Ta=25°C, unless otherwise specified)
DC PARAMETER
Operating Current Icc Vcc=3V, Mute=0.8V 2.7 4 mA
Output Voltage Vo
Output Offset Voltage Voo
Output High Level VOH 2V<Vcc<16V, Iout=-75mA Vcc~1 V
Output Low Level VOL 2V<Vcc<16V, Iout=75mA 0.16 V
Input Bias Current Ibias -100 -200 nA
Equivalent Resistance REQ Pin 1 100 150 220
AC PARAMETER
Open Loop Gain of Amp. 1 Gv1 80 dB
Open Loop Gain of Amp. 2 Gv2
Output Power Po
Total Harmonic Distortion
(f=1KHz)
Gain Bandwidth Product GBW 1.5 MHz
Power Supply Rejection
(Vcc=6V, ∆Vcc=3V)
Muting Gv(mute) Mute=2V, 1KHz<f<20KHz 70 dB
PARAMETER SYMBOL TEST CONDITIONS MIN TYP MAX UNIT
Vcc=16V, Mute=0.8V 3.3 5 mA
THD
PSRR
Vcc=3V, Mute=2V 65 100
RL=16Ω, R1=75KΩ
Vcc=6V, Rf=75KΩ,RL=32Ω
Vcc=3V, RL=6Ω, THD<10%
Vcc=6V, RL=32Ω, THD<10%
Vcc=12V, RL=100Ω, THD<10%
Vcc=6V, RL=32Ω, Po=125mW
Vcc<3V, RL=8Ω, Po=20mW
Vcc<12V, RL=32Ω, Po=200mW
C1=0.1µF, C2=0, f=1KHz
C1=1µF, C2=5µF, f=1KHz
Vcc=3V 1 1.15 1.25 V
Vcc=6V 2.65 V
Vcc=12V 5.65 V
Pin 8 18 25 40
f=1KHz, RL=32Ω
C1=∝, C2=0.01µF
-30 0 30 mV
-0.35 0 0.35 dB
55 mW
250 mW
400 mW
50 dB
0.5 1 %
0.5 %
0.6 %
12 dB
52 dB
µA
KΩ
KΩ
UTC UNISONIC TECHNOLOGIES CO., LTD.
QW-R108-008,A
3
UTC MC34119 LINEAR INTEGRATED CIRCUIT
TYPICAL PERFORMANCE CHARACTERISTICS
UTC UNISONIC TECHNOLOGIES CO., LTD.
QW-R108-008,A
4
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