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Motorola
Motorola

MC34119 Datasheet

LOW POWER AUDIO AMPLIFIER


MC34119 Datasheet Preview


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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 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
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
–1.0 to +18
±250
–1.0, VCC + 1.0
–1.0, VCC + 1.0
–55, +140
Unit
Vdc
mA
Vdc
°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
Page 1

MC34119
RECOMMENDED OPERATING CONDITIONS
Characteristics
Symbol
Supply Voltage
Voltage @ CD (Pin 1)
Load Impedance
Peak Load Current
Differential Gain (5.0 kHz Bandwidth)
VCC
VCD
RL
IL
AVD
Ambient Temperature
TA
Min
+2.0
0
8.0
0
–20
Max
+16
VCC
±200
46
+70
Unit
Vdc
Vdc
mA
dB
°C
ELECTRICAL CHARACTERISTICS (TA = 25°C, unless otherwise noted.)
Characteristics
Symbol
AMPLIFIERS (AC CHARACTERISTICS)
AC Input Resistance (@ VIn)
Open Loop Gain (Amplifier #1, f < 100 Hz)
Closed Loop Gain (Amplifier #2, VCC = 6.0 V, f = 1.0 kHz, RL = 32 )
Gain Bandwidth Product
ri
AVOL1
AV2
GBW
Output Power;
VCC = 3.0 V, RL = 16 , THD 10%
VCC = 6.0 V, RL = 32 Ω, THD 10%
VCC = 12 V, RL = 100 Ω, THD 10%
Total Harmonic Distortion (f = 1.0 kHz)
(VCC = 6.0 V, RL = 32 , Pout = 125 mW)
(VCC 3.0 V, RL = 8.0 , Pout = 20 mW)
(VCC 12 V, RL = 32 , Pout = 200 mW)
Power Supply Rejection (VCC = 6.0 V, VCC = 3.0 V)
(C1 = , C2 = 0.01 µF)
(C1 = 0.1 µF, C2 = 0, f = 1.0 kHz)
(C1 = 1.0 µF, C2 = 5.0 µF, f = 1.0 kHz)
Differential Muting (VCC = 6.0 V, 1.0 kHz f 20 kHz, CD = 2.0 V)
POut3
POut6
POut12
THD
PSRR
GMT
AMPLIFIERS (DC CHARACTERISTICS)
Output DC Level @ VO1, VO2, VCC = 3.0 V, RL = 16 (Rf = 75 k)
VCC = 6.0 V
VCC = 12 V
Output Level
High (Iout = –75 mA, 2.0 V VCC 16 V)
Low (Iout = 75 mA, 2.0 V VCC 16 V)
Output DC Offset Voltage (VO1–VO2)
(VCC = 6.0 V, Rf = 75 k, RL = 32 )
Input Bias Current @ Vin (VCC = 6.0 V)
Equivalent Resistance
@ FC1 (VCC = 6.0 V)
@ FC2 (VCC = 6.0 V)
CHIP DISABLE (Pin 1)
Input Voltage
Low
High
Input Resistance (VCC = VCD = 16 V)
VO(3)
VO(6)
VO(12)
VOH
VOL
VO
IIB
RFC1
RFC2
VIL
VIH
RCD
POWER SUPPLY
Power Supply Current
(VCC = 3.0 V, RL = , CD = 0.8 V)
(VCC= 16 V, RL = , CD = 0.8 V)
(VCC = 3.0 V, RL = , CD = 2.0 V)
NOTE: Currents into a pin are positive, currents out of a pin are negative.
ICC3
ICC16
ICCD
Min
80
–0.35
55
250
400
50
1.0
–30
100
18
2.0
50
Typ
>30
0
1.5
0.5
0.5
0.6
12
52
>70
1.15
2.65
5.65
VCC – 1.0
0.16
0
–100
150
25
90
2.7
3.3
65
Max
+0.35
1.0
1.25
+30
–200
220
40
0.8
175
4.0
5.0
100
Unit
M
dB
dB
MHz
mW
%
dB
dB
Vdc
Vdc
mV
nA
k
Vdc
k
mA
mA
µA
2 MOTOROLA ANALOG IC DEVICE DATA
Page 2

Symbol
CD
FC2
FC1
Vin
VO1
VCC
GND
VO2
MC34119
PIN FUNCTION DESCRIPTION
Pin Description
1 Chip Disable – Digital input. A Logic “0” (<0.8 V) sets normal operation. A logic “1” (2.0 V) sets the power down
mode. Input impedance is nominally 90 k.
2 A capacitor at this pin increases power supply rejection, and affects turn–on time. This pin can be left open if the
capacitor at FC1 is sufficient.
3 Analog ground for the amplifiers. A 1.0 µF capacitor at this pin (with a 5.0 µF capacitor at Pin 2) provides
(typically) 52 dB 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 alternate input.
4 Amplifier input. The input capacitor and resistor set low frequency rolloff and input impedance. The feedback
resistor is connected to this pin and VO1.
5 Amplifier Output #1. The dc level is (VCC – 0.7 V)/2.
6 DC supply voltage (+2.0 V to +16 V) is applied to this pin.
7 Ground pin for the entire circuit.
8 Amplifier Output #2. This signal is equal in amplitude, but 180° out–of–phase with that at VO1.
The dc level is (VCC – 0.7 V)/2.
TYPICAL TEMPERATURE PERFORMANCE (–20° C < TA < +70°C)
Function
Typical Change
Input Bias Current (@ Vin)
Total Harmonic Distortion
(VCC = 6.0 V, RL = 32 . Pout = 125 mW, f = 1.0 kHz)
Power Supply Current
(VCC = 3.0 V, RL = , CD = 0 V)
(VCC = 3.0 V, RL = , CD = 2.0 V)
±40
+0.003
–2.5
–0.03
Units
pA/°C
%/°C
µA/°C
MOTOROLA ANALOG IC DEVICE DATA
3
Page 3
Part Number MC34119
Manufactur Motorola
Description LOW POWER AUDIO AMPLIFIER
Total Page 12 Pages
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