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Diodes Semiconductor Electronic Components Datasheet

PAM8908 Datasheet

25mW TRUE CAP FREE STEREO HEADPHONE AMPLIFIER

No Preview Available !

A Product Line of
Diodes Incorporated
PAM8901 / PAM8908
25mW TRUE CAP FREE STEREO HEADPHONE AMPLIFIER
Description
The PAM8901 / PAM8908 stereo headphone driver is designed for
portable equipment where board space is at a premium. The
PAM8901 / PAM8908 uses a unique, patent pending architecture to
produce a ground-referenced output from a single supply, eliminating
the need for large DC-blocking capacitors, saving cost, board space,
and component height.
The PAM8901 / PAM8908 delivers up to 25mW per channel into a
16load and has low 0.03% THD+N. A high power-supply rejection
ratio (80dB at 1kHz) allows this device to operate from noisy digital
supplies without an additional linear regulator.
The PAM8901 / PAM8908 operates from a single supply from 2.5V t o
5.5V, has short-circuit and over temperature protection. Shutdown
mode reduces supply current to less than 1µA.
Pin Assignments
Features
Patent Pending 3 Phase Power Line Shift Charge Pump
Eliminates Need for DC-Blocking Capacitors
TrueCapFree Architecture, Output Biased at 0V (System
Ground)
Excellent Low Frequency Fidelity
80dB PSRR at 1kHz
Less than 1uA Shutdown current
Support both Fully differential and Single-Ended Inputs
Short Circuit and Over Temperature Protection
Selectable Gain settings:-6dB,0dB,3dB and 6dB
Available in Space Saving Packages: TQFN3x3-16L
Applications
Smart Phones/Cellular Phones
Notebook Computers
Portable DVD Player
Personal Digital Assistants (PDAs )
Electronic Dictionaries
Digital Still Cameras
Portable Gaming
Typical Applications Circuit
Typical Applcation Configuration with Differential Input Signals
PAM8901/
PAM8908
PAM8901 / PAM8908
Document number: DSxxxxx Rev. 1 - 1
1 of 12
www.diodes.com
December 2012
© Diodes Incorporated


Diodes Semiconductor Electronic Components Datasheet

PAM8908 Datasheet

25mW TRUE CAP FREE STEREO HEADPHONE AMPLIFIER

No Preview Available !

A Product Line of
Diodes Incorporated
PAM8901 / PAM8908
Typical Applications Circuit (cont.)
Typical Applcation Configuration with Single-Ended Input Signal
PAM8901/
PAM8908
Pin Descriptions
Pin Number
PAM8901 PAM8908
T-QFN3x3-16L
Pin Name
I/O/P
Function
11
INL-
I Inverting left input for differential signals.
22
INL+
I Non-inverting left input for differential signals.
33
INR+
I Inverting right input for differential signals.
44
INR-
I Non-inverting right input for differential signals.
56
G0 I Gain select bit 0
67
G1 I Gain select bit 1
7
5
OUTR
O Right headphone amplifier output. Connect to right terminal of headphone jack.
8
8
HPVSS
P
Charge pump output and negative power supply for output amplifiers; connect 1µF
capacitor to GND
9
10
PGND
P Power Ground
10 9
CAP-
O Charge pump negative flying cap.
11 11
CAP+
O Charge pump positive flying cap.
12 14
PVDD
P Power VDD.
13
12
HPVDD
O Positive power supply for headphone amplifiers. Charge pump positive half VDD output.
14 16
OUTL
O Left headphone ampli fier output. Connect to left terminal of headphone jack.
15 15
SGND
I Amplifier reference voltage.
16 13
EN I Amplifier enabled. Connect to logic low to shutdown; connect to logic high to activate
PAM8901 / PAM8908
Document number: DSxxxxx Rev. 1 - 1
2 of 12
www.diodes.com
December 2012
© Diodes Incorporated


Part Number PAM8908
Description 25mW TRUE CAP FREE STEREO HEADPHONE AMPLIFIER
Maker Diodes
Total Page 12 Pages
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