MC34119
LOW POWER AUDIO AMPLIFIER

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The UTC MC34119 is a 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.

PARAMETER SYMBOL RATINGS UNIT
Supply Voltage VCC -1~+18 V
Output Current IOUT ±250 mA
Maximum Input, Ripple Rejection, Mute Pin Voltage VIN -1~+1 V
Applied Output Voltage (Output Pin When Disabled VOUT -1~+1 V
Junction Temperature TJ +125 °C
Operating Temperature TOPR -20 ~ +85 °C
Storage Temperature TSTG -40 ~ +1 °C
· Wide operating supply voltage: VCC=2V~16V
· Low quiescent supply current (ICC=2.7mA, typ)
· Medium output power (POUT=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 requ

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Datasheet

Size: 264.71KB
Page: 12
PDF: MC34119.pdf
  • Description:
    LOW POWER AUDIO AMPLIFIER
  • MFG:
    MOTOROLA [Motorola, Inc]
 

Abstract


Device
Operating
Temperature Range Package
C0077C0067C0051C0052C0049C0049C0057
SEMICONDUCTOR
TECHNICAL DATA
LOW POWER
AUDIO AMPLIFIER
ORDERING INFORMATION
MC34119P
MC34119D T
A
= –20° to +70°C
Plastic DIP
SO–8
PIN CONNECTIONS
Order this document by MC34119/D
D SUFFIX
PLASTIC PACKAGE
CASE 751
(SO–8)
P SUFFIX
PLASTIC PACKAGE
CASE 626
8
1
8
1
(Top View)
1
2
3
4
8
7
6
5
CD
FC2
FC1
V
in
V
O2
Gnd
V
CC
V
O1
MC34119DTB TSSOP
DTB SUFFIX
PLASTIC PACKAGE
CASE 948J
(TSSOP)
8
1
1
MOTOROLA ANALOG IC DEVICE DATA
C0076C0111C0119 C0080C0111C0119C0101C0114 C0065C0117C0100C0105C0111 C0065C0109C0112C0108C0105C0102C0105C0101C0114
The MC34119 is a low power audio amplifier intergrated circuit intended
(primarily) for telephone applications, such as in speakerphones. It provides
differential speaker outputs to maximize output swing at low supply voltages
(2.0 V minimum). Coupling capacitors to the speaker are not required. Open
loop gain is 80 dB, and the closed loop gain is set with two external resistors.
A Chip Disable pin permits powering down and/or muting the input signal.
The MC34119 is available in standard 8–pin DIP, SOIC package, and
TSSOP package.
? Wide Operating Supply Voltage Range (2.0 V to 16 V), Allows
Telephone
Line Powered Applications
? Low Quiescent Supply Current (2.7 mA Typ) for Battery
Powered Applications
? Chip Disable Input to Power Down the IC
? Low Power–Down Quiescent Current (65 ?A Typ)
? Drives a Wide Range of Speaker Loads (8.0 ? and Up)
? Output Power Exceeds 250 mW with 32 ? Speaker
? Low Total Harmonic Distortion (0.5% Typ)
? Gain Adjustable from <0 dB to >46 dB for Voice Band
? Requires Few External Components
MAXIMUM RATINGS
Rating Value Unit
Supply Voltage –1.0 to +18 Vdc
Maximum Output Current at V
O1
, V
O2
±250 mA
Maximum Voltage @ V
in
, FC1, FC2, CD
Applied Output Voltage to V
O1
, V
O2
when disabled
–1.0, V
CC
+ 1.0
–1.0, V
CC
+ 1.0
Vdc
Junction Temperature –55, +140 °C
NOTE: ESD data available upon request.
Block Diagram and Simplified Application
* = Optional
Differential Gian = 2 x
R
f
R
i

+
#1

+
#2
MC34119
Bias
Circuit
Speaker
Chip
Disable
Audio
Input
Gnd
Rf
75 k
6V
CC
C
i
0.1
R
i
3.0 k
V
in 4
FC1
3
C1
1.0 ?F
C2*
5.0 ?F
FC2
2
50 k
125 k
50 k
4.0 k
4.0 k
7
5
V
O1
8
V
O2
1
CD
This device contains 45 active transistors.
? Motorola, Inc. 1996 Rev 1

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