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PAM8908 데이터시트 PDF




PAM에서 제조한 전자 부품 PAM8908은 전자 산업 및 응용 분야에서
광범위하게 사용되는 반도체 소자입니다.


PDF 형식의 PAM8908 자료 제공

부품번호 PAM8908 기능
기능 25-mW TrueCapFree Stereo Headphone Amplifier
제조업체 PAM
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PAM8908 데이터시트, 핀배열, 회로
PAM8908
25-mW TrueCapFree Stereo Headphone Amplifier
Key Features
n Patent Pending 3 Phase Power Line Shift
Charge Pump Eliminates Need for DC-
Blocking Capacitors
n TrueCapFree Architecture, Output Biased at
0V (System Ground)
n Excellent Low Frequency Fidelity
n High PSRR
n Less Than 1uA Shutdown Current
n Support Both Fully Differential and Single-
Ended Inputs
n Short Circuit and Over Temperature
Protection
n Selectable Gain Settings:-6dB,0dB,3dB and
6dB
n Available in Space Saving Packages:
TQFN3x3-16L
Applications
n Smart Phones/Cellular Phones
n Notebook Computers
n Portable DVD Player
n Personal Digital Assistants (PDAs )
n Electronic Dictionaries
n Digital Still Cameras
n Potable Gaming
Typical Application Circuit
General Description
The PAM8908 stereo headphone driver is
designed for portable equipment where board
space is at a premium. The PAM8908 uses a
unique, patent pending architecture to produce a
ground-refer enced output from a single supply,
eliminating the need for large DC-blocking
capacitors, saving cost, board space, and
component height.
The PAM8908 delivers up to 25mW per channel
into a 16Ω load and has low 0.03% THD+N. A high
power-supply rejection ratio allows this device to
operate from noisy digital supplies without an
additional linear regulator.
The PAM8908 operates from a single supply from
2.5V to 5.5V, has short-circuit and over
temperature protection. Shutdown mode reduces
supply current to less than 1uA.
Typical Application Configuration with Differential Input Signals
OUTR+
Audio OUTR-
Source
OUTL+
OUTL-
1uF
1uF
1uF
1uF
ENABLE
G0
G1
INR+
INR-
OUTR
INL+
OUTL
INL-
PAM8908
EN
G0 SGND
G1 PGND
VBAR
2.2uF
PVDD
HPVDD
CAP+
1uF
HPVSS
CAP-
1uF
1uF
Power Analog Microelectronics, Inc
www.poweranalog.com
1
05/2011 Rev1.0




PAM8908 pdf, 반도체, 판매, 대치품
PAM8908
25-mW TrueCapFree Stereo Headphone Amplifier
Absolute Maximum Ratings
These are stress ratings only and functional operation is not implied. Exposure to absolute
maximum ratings for prolonged time periods may affect device reliability. All voltages are with
respect to ground.
Supply Voltage(PVDD).................................6.0V
Input Voltage(INR+, INR-, INL+, INL-)...................
..............................HPVSS-0.3V to HPVDD+0.3V
Control Interface Voltage( G0, G1, EN).................
............................................-0.3V to PVDD+0.3V
Storage Temperature....................-65°C to 150°C
Maximum Junction Temperature.................150°C
Soldering Temperature...................250°C,10 sec
Recommended Operating Conditions
Supply Voltage Range....................... 2.5V to 5.5V Ambient Temperature Range............-40 °C to 85 °C
Junction Temperature Range.........-40°C to 125°C
Thermal Information
Parameter
Thermal Resistance (Junction to Ambient)
Thermal Resistance (Junction to Case)
Symbol
θJA
θJC
Package
TQFN 3x3-16
TQFN 3x3-16
M aximum
35
14
Unit
°C/W
°C/W
Power Analog Microelectronics, Inc
www.poweranalog.com
4
05/2011 Rev1.0

4페이지










PAM8908 전자부품, 판매, 대치품
PAM8908
25-mW TrueCapFree Stereo Headphone Amplifier
Typical Operating Characteristics
TA=25°C, PVDD=3.6V, f=1kHz, Gain=6dB, unless otherwise.
7. Crosstalk
+0
-5 R L=32Ω
-10 PVDD=3.6V
-15 Po=10mW
-20
-25
-30
-35
-40
d -45
B
-50
-55
-60
-65
-70
-75
-80
-85
-90
20 50 100
200
500
Hz
1k
9. PSRR
+0TT TTTTTTTTT TT
PVDD=3.6V+200mVpp
-10 RL=32Ω
-20
-30
-40
d
B
-50
-60
-70
-80
-90
-100
20 50 100 200
11. FFT Noise
+0
-10
-20 RL=32Ω
-30
-40
-50
-60
d
B -70
r
-80
A
-90
-100
-110
-120
-130
-140
-150
20 50 100 200
500
Hz
1k
500
Hz
1k
2k
2k
2k
5k 10k 20k
5k 10k 20k
5k 10k 20k
Power Analog Microelectronics, Inc
www.poweranalog.com
7
8. Crosstalk
+0
-5
-10
R L=16Ω
-15 PVDD=3.6V
-20 Po=10mW
-25
-30
-35
-40
d -45
B
-50
-55
-60
-65
-70
-75
-80
-85
-90
20 50 100
200
500
Hz
1k
2k
10. PSRR
+0TT TTT TTTT TT TT
-10 PVDD=3.6V+200mVpp
RL=16Ω
-20
-30
-40
d
B
-50
-60
-70
-80
-90
-100
20
50 100 200
500 1k
Hz
12. FFT Noise
+0
-10
-20
-30
-40
-50
-60
d
B -70
V -80
-90
-100
-110
-120
-130
-140
-150
20
RL=16Ω
50 100
200
500
Hz
1k
2k
2k
5k 10k 20k
5k 10k 20k
5k 10k 20k
05/2011 Rev1.0

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