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. SOP-8 DIP-8 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 BLOCK DIAGRAM UTC UNISONIC TECHNOLOGIES CO., LTD. 1 QW-R108-008,A UTC MC34119 LINEAR INTEGRATED CIRCUIT ABSOLUTE MAXIMUM RATINGS(Ta=25°C ) PARAMETER Supply Voltage Output Current Maximum Input, Ripple Rejection, Mute Pin Voltage Applied Output Voltage( Output Pin When Disabled) Junction Temperature SYMBOL VALUE UNIT Vcc Io Vi -1 to +18 +-250 -1 to +1 V mA V Vo -1 to +1 V Tj -55 to +150 °C PIN CONFIGURATIONS PIN NAME 1 Mute 2 3 4 5 6 7 8 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” (2V to Vcc), the IC is disabled. If Mute is open, that is equivalent to a logic “ LOW” . Ripple 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. Input(+) Analog Ground for the amplifiers. A 1µF capacitor at this pin ( with a 5µF capacitor at pin 8) 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. 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. Output 1 Amplifier 1’ s output. The DC level is about (Vcc~0.7V)/2. Vcc DC supply voltage is applied to this pin( Vcc=2~16V). GND Ground pin. out of phase with that output 1, the Output 2 Amplifier 2’ s output. This signal is equal in amplitude, but 180¡ ã DC level is about (Vcc~0.7V)/2. RECOMMENDED OPERATION CONDITIONS(Ta=25°C) PARAMETER Supply Voltage Load Impedance Peak Load Current Differential Gain(5KHz Bandwidth) Voltage at Mute Ambient Temperature UTC SYMBOL VALUE UNIT Vcc ZL 2~16 8~100 +-200 0~46 0~Vcc -20~470 V Ω mA dB V °C IL(peak) ∆Gv Vi(mute) Ta UNISONIC TECHNOLOGIES CO., LTD. 2 QW-R108-008,A UTC MC34119 LINEAR INTEGRATED CIRCUIT ELECTRICAL CHARACTERISTICS (Vcc=6V, Ta=25°C, unless otherwise specified) PARAMETER SYMBOL DC PARAMETER 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 PARAMETER Open Loop Gain of Amp. 1 Open Loop Gain of Amp. 2 Output Power Gv1 Gv2 Po Total Harmonic Distortion (f=1KHz) THD TEST CONDITIONS Vcc=3V, Mute=0.8V Vcc=16V, Mute=0.8V Vcc=3V, Mute=2V RL=16Ω, R1=75KΩ Vcc=3V Vcc=6V Vcc=12V Vcc=6V, Rf=75KΩ,RL=32Ω 2V<Vcc<16V, Iout=-75mA 2V<Vcc<16V, Iout=75mA Pin 1 Pin 8 f=1KHz, 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 MIN 1 -30 100 18 80 -0.35 55 250 400 Vcc<3V, RL=8Ω, Po=20mW Vcc<12V, RL=32Ω, Po=200mW Gain Bandwidth Product Power Supply Rejection (Vcc=6V, ∆Vcc=3V) Muting UTC GBW PSRR Gv(mute) C1=∝, C2=0.01µF C1=0.1µF, C2=0, f=1KHz C1=1µF, C2=5µF, f=1KHz Mute=2V, 1KHz<f<20KHz TYP MAX UNIT 2.7 3.3 65 4 5 100 mA mA µA 1.15 2.65 5.65 0 Vcc~1 0.16 -100 150 25 1.25 -200 220 40 V V V mV V V nA KΩ KΩ 0 0.35 0.5 1 30 dB dB mW mW mW % 0.5 0.6 1.5 % % MHz dB 12 52 dB dB dB 50 70 UNISONIC TECHNOLOGIES CO., LTD. 3 QW-R108-008,A UTC MC34119 LINEAR INTEGRATED CIRCUIT TYPICAL PERFORMANCE CHARACTERISTICS UTC UNISONIC TECHNOLOGIES CO., LTD. 4 QW-R108-008,A