Rev. A/AH

MC34119 Series

Low Voltage Audio Amplifier

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Low Voltage Audio Amplifier

General Description

• The MC34119 series are low power audio amplifier IC 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. The Mute pin permits powering down and/or muting the input signal.

Features • Wide operating supply voltage: VCC=2V to 16V • Low quiescent supply current (ICC=2.7mA, typ.) • Medium power output over 250mW at VCC=6V, RL=32Ω, THD＜10% • Load impedance range (8Ω~100Ω) • Low total harmonic distortion (0.5% typ.) • Mute function (ICC=65μA, typ.) • Minimum number of external parts required • RoHS compliant and halogen free

Ordering Information MC34119 - 85 - Circuit Type Packing Code TU: Tube, RoHS UG: Tube, Halogen Free TR30: 13” Reel, RoHS RG30: 13” Reel, Halogen Free

Outline Factory Location Code P8: DIP-8 TS8: TSSOP-8 S8: SOP-8

DIP-8

SOP-8

TSSOP-8

Low Voltage Audio Amplifier

Rev. A/AH

MC34119 Series

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Pin Configuration

Pin Description Pin No. 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 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”.

2 Ripple Rejection

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 3 is sufficient.

3 Input(+)

Analog Ground for the amplifiers. A 1μF capacitor at this pin (with a 5μF capacitor at pin 2) 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.

4 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.

5 Output 1 Amplifier output 1. 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 Amplifier output 2. This signal is equal in amplitude, but 180°out of phase with that output 1, the DC level is about (VCC~0.7V)/2.

Low Voltage Audio Amplifier

Rev. A/AH

MC34119 Series

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Block Diagram

Absolute Maximum Ratings (TA=25°C)

Symbol Description Ratings Unit

VCC Supply Voltage -1 ~ +18 V IOUT Output Current ±250 mA VIN Maximum Input, Ripple Rejection, Mute Pin Voltage -1 ~ +1 V

VOUT Applied Output Voltage (Output Pin When Disabled) -1 ~ +1 V TJ Junction Temperature +125 °C

TOPR Operating Temperature -20 ~ +85 °C TSTG Storage Temperature -40 ~ +150 °C

Low Voltage Audio Amplifier

Rev. A/AH

MC34119 Series

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Note: 1. Absolute maximum ratings are those values beyond which the device could be permanently damaged. 2. Absolute maximum ratings are stress ratings only and functional device operation is not implied.

Recommended Operation Conditions (TA=25°C)

Symbol Description Ratings Unit

VCC Supply Voltage 2 ~ 16 V

ZL Load Impedance 8 ~ 100 Ω

IL(PEAK) Peak Load Current ±200 mA

∆GV Differential Gain (5KHz Bandwidth) 0 ~ 46 dB

VI(MUTE) Voltage at Mute 0 ~ VCC V

Ta Ambient Temperature -20 ~ +70 °C

Electrical Characteristics (VCC=6V, TA=25°C, Unless otherwise specified) Symbol Description Min. Typ. Max. Unit Conditions

DC Parameter - 2.7 4 mA VCC=3V, Mute=0.8V - 3.3 5 mA VCC=16V, Mute=0.8V ICC Operating Current - 65 100 µA VCC=3V, Mute=2V 1 1.15 1.25 V RL=16Ω, R1=75KΩ, VCC=3V - 2.65 - V RL=16Ω, R1=75KΩ, VCC=6V VOUT Output Voltage - 5.65 - V RL=16Ω, R1=75KΩ, VCC=12V

VO(OFF) Output Offset Voltage -30 0 30 mV RL=32Ω, RF=75KΩ, VCC=6V VOH Output High Level - VCC-1 - V 2V<VCC<16V, IOUT=-75mA VOL Output Low Level - 0.16 - V 2V<VCC<16V, IOUT=75mA

II(BIAS) Input Bias Current - -100 -200 nA 100 150 220 KΩ Pin 3

REQ Equivalent Resistance 18 25 40 KΩ Pin 2

AC Parameter GV1 Open Loop Gain of Amp. 1 80 - - dB GV2 Open Loop Gain of Amp. 2 -035 0 0.35 dB f=1KHz, RL=32Ω

Low Voltage Audio Amplifier

Rev. A/AH

MC34119 Series

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Symbol Description Min. Typ. Max. Unit Conditions

55 - - mW VCC=3V, RL=16Ω, THD<10% 250 - - mW VCC=6V, RL=32Ω, THD<10% POUT Output Power 400 - - mW VCC=12V, RL=100Ω, THD<10%

- 0.5 1 % VCC=6V, RL=32Ω, POUT=125mW - 0.5 - % VCC≥3V, RL=8Ω, POUT=20mW THD

Total Harmonic Distortion (f=1KHz)

- 0.6 - % VCC≥12V, RL=32Ω, POUT=200mWGBW Gain Bandwidth Product - 1.5 - MHz

50 - -- dB C1=∞, C2=0.01µF - 12 - dB C1=0.1µF, C2=0, f=1KHz RR Power Supply Rejection

(VCC=6V, ΔVCC=3V) - 52 - dB C1=1µF, C2=5µF, f=1KHz

GVMUTE) Muting 70 - - dB Mute=2V, 1KHz<f<20KHz

Typical Circuit

Low Voltage Audio Amplifier

Rev. A/AH

MC34119 Series

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Fig.1- Differential Gain vs. Frequency

Frequency (Hz)

Fig.2- Distortion vs. Power (f=3.0KHz, AVD=12dB)

Output Power (mW)

Fig.3- Device Dissipation, 16Ω Load

Load Power (mW)

Fig.4- Device Dissipation, 32Ω Load

Load Power (mW)

Typical Characteristics Curves

Diff

eren

tial G

ain

(dB

)

Tota

l Har

mon

ic D

isto

rtio

n, T

HD

(%)

Dev

ice

Dis

sipa

tion

(mW

)

Dev

ice

Dis

sipa

tion

(mW

)

Low Voltage Audio Amplifier

Rev. A/AH

MC34119 Series

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Fig.5- Distortion vs. Power (f=1.0KHz, AVD=34dB)

Output Power (mW)

Fig.6- Distortion vs. Power (f=3.0KHz, AVD=34dB)

Output Power (mW)

Fig.7- Power Supply Current

Supply Voltage (V)

Fig.8- Small Signal Response

20µS/DIV

Tota

l Har

mon

ic D

isto

rtio

n, T

HD

(%)

Tota

l Har

mon

ic D

isto

rtio

n, T

HD

(%)

Pow

er S

uppl

y C

urre

nt (m

A)

Out

put

20m

V/D

IV

inpu

t 1.

0mV/

DIV

Low Voltage Audio Amplifier

Rev. A/AH

MC34119 Series

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Fig.9- Large Signal Response

20µS/DIV

Fig.10- VCC-VOH @ VO1, VO2 vs. Load Current

Load Current (mA)

Fig.11- VOL @ VO1, VO2 vs. Load Current

Load Current (mA)

Fig.12- Input Characteristics @ CD (Pin 1)

Chip Disable Voltage (V)

Out

put

1.0V

/DIV

VCC

-VO

H (V

)

Out

put L

ow L

evel

(V)

inpu

t

80m

V/D

IV

ICD

(µA

)

Low Voltage Audio Amplifier

Rev. A/AH

MC34119 Series

www.taitroncomponents.com Page 9 of 12

Dimensions in mm(inch)

DIP-8

Low Voltage Audio Amplifier

Rev. A/AH

MC34119 Series

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SOP-8

Low Voltage Audio Amplifier

Rev. A/AH

MC34119 Series

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TSSOP-8

Low Voltage Audio Amplifier

Rev. A/AH

MC34119 Series

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