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Advanced Analog Circuits
Data Sheet AZ386
LOW VOLTAGE AUDIO POWER AMPLIFIER General Description
The AZ386 is a power amplifier designed for use in low voltage consumer applications. The gain is internally set to 20dB to keep external part count low, but the addition of an external resistor and capacitor between pins 1 and 8 will increase the gain to any value from 20 to 200dB. The inputs are ground referenced while the output automatically biases to one-half the supply voltage. The quiescent power drain is only 24mW when operating from a 6V supply, making the AZ386 ideal for battery operation.
Features
* * * * * * * Wide supply voltage range: 5V to 18V Low quiescent current drain: 4.5mA Voltage gains from 20 to 200dB Battery operation Minimum external parts Low power dissipation Low distortion
Applications
* * * * * * * * * AM - FM radio amplifier Cordless phone TV sound systems Portable tape player amplifier Intercoms Line drivers Ultrasonic drivers Small servo drivers Power converters
DIP-8
SOIC-8
Figure 1. Package Types of AZ386
June 2003
1
Rev. 1.0
Advanced Analog Circuits
Data Sheet AZ386
LOW VOLTAGE AUDIO POWER AMPLIFIER Pin Configuration
M Package/P Package (SOIC-8/DIP-8)
GAIN INPUT INPUT + GND 1 2 3 4 8 7 6 5 GAIN BYPASS VCC VOUT
Top View Figure 2. Pin Configuration of AZ386
Functional Block Diagram
6 VCC 7 BYPASS 15K GAIN 8 15K 150 2 INPUT 1.35K 15K 3 INPUT + GAIN 1 5 VOUT
50K 50K 4 GND
Figure 3. Functional Block Diagram of AZ386
June 2003
2
Rev. 1.0
Advanced Analog Circuits
Data Sheet AZ386
LOW VOLTAGE AUDIO POWER AMPLIFIER Ordering Information
Package SOIC-8 DIP-8 Temperature Range -40 oC~85 oC Part Number AZ386M AZ386P Marking ID 386M AZ386P
Packing Type Tube/Tape/Reel Tube
Absolute Maximum Ratings (Note 1)
Parameter Power Supply Voltage Package Dissipation (Note 2) Input Voltage Operating Temperature Range Junction Temperature Storage Temperature Range Soldering Information Symbol VCC PD VIN TOP TJ TSTG AZ386P AZ386M -0.4 -40 to 85 150 -65 to 150 DIP-8 Soldering (10 sec.) SOIC-8 (15 sec.) Thermal Resistance JA DIP SOIC 260 215 107 172
o o o o
Value 20 1.25 0.73
Unit V W W V C C C
oC
C/W
Note 1: Stresses greater than those listed under "Absolute Maximum Ratings" may cause permanent damage to the device. These are stress ratings only, and functional operation of the device at these or any other conditions beyond those indicated under "Recommended Operatiing Conditions" is not implied. Exposure to "Absolute Maximum Ratings" for extended periods may affect device reliability. Note 2: For operation in ambient temperatures (TA) above 25oC, the device must be derated based on a 150oC maximum junction temperature and 1) a thermal resistance of 107oC/W junction to ambient for the dual-in-line package and 2) a thermal resistance of 170oC/W for the small outline package.
June 2003
3
Rev. 1.0
Advanced Analog Circuits
Data Sheet AZ386
LOW VOLTAGE AUDIO POWER AMPLIFIER Electrical Characteristics (Note 3)
Operating Conditions: TA=25oC unless otherwise specified.
Parameter Supply Voltage Quiescent Current Output Power Symbol VCC IQ POUT VCC = 6V, VIN = 0 VCC = 6V, RL = 8, THD = 10% VCC = 9V, RL = 8, THD = 10% VCC = 16V, RL = 32, THD = 10% Voltage Gain Bandwidth Total Harmonic Distortion Power Supply Rejection Ratio Input Resistance Input Bias Current GV BW THD PSRR RIN IBIAS VCC = 6V, Pin 2 and 3 open VCC = 6V, f = 1KHz 10F from Pin 1 to 8 VCC = 6V, Pins 1 and 8 open VCC = 6V, RL = 8, POUT = 125mW f=1KHz, Pins 1 and 8 open VCC = 6V, f=1KHz, CBYPASS = 10F, Pins 1 and 8 open, Referred to Output 250 500 700 Test Conditions Min 5 4.5 325 700 1000 26 46 300 0.2 50 50 250 Typ
Max 18 8
Unit V mA mW mW mW dB dB KHz % dB K nA
Note 3: All voltages are measured with respect to the ground pin, unless otherwise specified.
June 2003
4
Rev. 1.0
Advanced Analog Circuits
Data Sheet AZ386
60
LOW VOLTAGE AUDIO POWER AMPLIFIER Typical Performance Characteristics
6.0
Power Supply Rejection Ratio (dB)
5.8 Supply Current (mA) 5.6 5.4 5.2 5.0 4.8 4.6 4.4 4.2 4.0 4 5 6 7 8 9 10 11 12 TA=25 C
o
50 40 30
C7=50uF
C7=10uF
C7=1uF 20 10 0 10 No Bypass Capacitor
100
1k Frequency (Hz)
10k
100k
Supply Voltage (V)
Figure 4. Quiescent Supply Current vs. Supply voltage
Figure 5. Power Supply Rejection Ratio (Referred to the Output) vs. Frequency
12 RL=8 Output Voltage Swing (V) 10 8 6 4 2 0 RL=
Voltage Gain (dB)
50
40
C1,8=10uF
RL=16 RL=4
30
20
C1,8=0
10
4
5
6
7
8
9
10
11
12
0 100
1k
10k
100k
1M
Supply Voltage (V)
Frequency (Hz)
Figure 6. Peak-to-Peak Output Voltage Swing vs. Supply Voltage
Figure 7. Voltage Gain vs. Frequency
0.55 0.50 0.45 0.40 0.35 0.30 0.25 0.20 0.15 20 100 1k 10k
11
Total Harmonic Distortion (%)
Total Harmonic Distortion ( % )
VCC=6V RL=8 POUT=125mW C1,8=0
10 9 8 7 6 5 4 3 2 1 1
VCC=6V RL=8 f=1KHz
Frequency (Hz)
10
100
Power Out ( mW )
Figure 8. Distortion vs. Frequency
Figure 9. Distortion vs. Output Power
June 2003
5
Rev. 1.0
Advanced Analog Circuits
Data Sheet AZ386
LOW VOLTAGE AUDIO POWER AMPLIFIER Typical Performance Characteristics (Continued)
1.8 1.6 Device Dissipation (W) Device Dissipation (W) 1.4 1.2 1.0 0.8 0.6 0.4 0.2 0.0 0.0 0.1 VCC=6 V 0.2 Output Power (W) 0.3 THD=10% VCC=12 V 1.6 1.4 1.2 1.0 0.8 0.6 0.4 0.2 0.4 0.0 0.0 0.1 0.2 VCC=6 V 0.3 0.4 0.5 0.6 THD=3% VCC=16 V THD=3% VCC=12 V
THD=3%
THD=10%
0.7
0.8
0.9
Output Power (W)
Figure 10. Device Dissipation vs. Output Power (4 Load)
Figure 11. Device Dissipation vs. Output Power (8 Load)
Typical Applications
VCC
VCC
10F
6 2VIN 10K 3 + 4 AZ386 0.05F 7 10 1 8 5 250F
6 2VIN 10K 3 + 4 BYPASS AZ386 7
1 8
250F
5 0.05F 10
Figure 13. Amplifier With Gain = 20dB
Figure 14. Amplifier With Gain = 200dB
June 2003
6
Rev. 1.0
Advanced Analog Circuits
Data Sheet AZ386
LOW VOLTAGE AUDIO POWER AMPLIFIER Typical Applications (Continued)
VCC 1.2K 6 2VIN 10K 3 + 4 BYPASS AZ386 7 0.05F 10 1
8
10F
ELDEMA CF-S-2158 3V - 15mA 3
VCC 6
2-
390 10F
1
250F 5
8
50F 5
AZ386 + BYPASS 7 0.01F 47K
VO
0.05F 10
RL
4.7K
0.01F
Figure 15. Amplifier With Gain = 50dB
Figure 16. Low Distortion Power Wienbridge Oscillator
VCC
VCC 6 2 0.1F AZ386 3
10 RL
6 2 8
10K
0.033F
-
1 8 5 7 4 10K f = 1KHz 50F
30K vo
1
AZ386 10K 3 + 4 7 5 0.05F
250F V o
+
RL
1K
Figure 17. Amplifier With Bass Boost
Figure 18. Square Wave Oscillator
June 2003
7
Rev. 1.0
Advanced Analog Circuits
Data Sheet AZ386
LOW VOLTAGE AUDIO POWER AMPLIFIER Mechanical Dimensions DIP-8
Unit: mm
9.20.10
6
6
7.620.25 5
3.300.30
1.460.31
0.7
4
4
3x0.150.05
0.254 0.457
2.54 0.13MIN
0.280.07 10.0MAX
R0.75
June 2003
6.600.50
8
Rev. 1.0
Advanced Analog Circuits
Data Sheet AZ386
LOW VOLTAGE AUDIO POWER AMPLIFIER Mechanical Dimensions (Continued) SOIC-8
Unit: mm
1.550.20
0.220.03
0.32
8
4.90.10 7
0.700.025
0.20.10
7
8
D
6.000.20
D 20:1
0.8
3.900.10
4 4
0.90
1.00
R0.15
R0.15
0.420.09
3 2
June 2003
0.20
9
Rev. 1.0
Advanced Analog Circuits
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