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MC34119 Datasheet PDF : 12 Pages
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Low Power Audio Amplifier
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 µA Typ)
• Drives a Wide Range of Speaker Loads (8.0 Ω and Up)
• Output Power Exceeds 250 mW with 32 Ω 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
Supply Voltage
Maximum Output Current at VO1, VO2
Maximum Voltage @ Vin, FC1, FC2, CD
Applied Output Voltage to VO1, VO2 when disabled
Junction Temperature
NOTE: ESD data available upon request.
Value
Unit
–1.0 to +18
Vdc
±250
mA
–1.0, VCC + 1.0 Vdc
–1.0, VCC + 1.0
–55, +140
°C
MC34119
LOW POWER
AUDIO AMPLIFIER
SEMICONDUCTOR
TECHNICAL DATA
8
1
P SUFFIX
PLASTIC PACKAGE
CASE 626
8
1
D SUFFIX
PLASTIC PACKAGE
CASE 751
(SO–8)
8
1
DTB SUFFIX
PLASTIC PACKAGE
CASE 948J
(TSSOP)
Block Diagram and Simplified Application
Rf
75 k
6 VCC
Audio
Input
Ci
0.1
Ri
3.0 k
Vin
FC1
C1
1.0 µF
C2*
5.0 µF
FC2
* = Optional
Differential Gian = 2 x
4
–
3
+ #1
4.0 k
4.0 k
5 VO1
Speaker
50 k
–
2
125 k
#2
+
8 VO2
50 k
Bias
1 CD Chip
Circuit
Disable
MC34119
7
Gnd
Rf
Ri
This device contains 45 active transistors.
MOTOROLA ANALOG IC DEVICE DATA
PIN CONNECTIONS
CD 1
FC2 2
8 VO2
7 Gnd
FC1 3
6 VCC
Vin 4
5 VO1
(Top View)
ORDERING INFORMATION
Device
Operating
Temperature Range Package
MC34119P
MC34119D TA = –20° to +70°C
MC34119DTB
Plastic DIP
SO–8
TSSOP
© Motorola, Inc. 1996
Rev 1
1
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