深圳市天吉芯技术开发有限公司
PAM8908:25MW功率:25mw较小包装:3000品牌:pam库存情况:现货
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Diodes Incorporated and its subsidiaries reserve the right to make modifications, enhancements, improvements, corrections or other changes
without further notice to this document and any product described herein. Diodes Incorporated does not assume any liability arising out of the
application or use of this document or any product described herein; neither does Diodes Incorporated convey any license under its patent or
trademark rights, nor the rights of others. Any Customer or user of this document or products described herein in such applications shall assume
all risks of such use and will agree to hold Diodes Incorporated and all the companies whose products are represented on Diodes Incorporated
website, harmless against all damages.
The basic PAM8901 / PAM8908 application circuit is shown in page 2.
Gain Control
The PAM8901 / PAM8908 has four gain settings which are controlled with pins G0 and G1. The following table gives an overview of the gain
function.
G0 Voltage G1 Voltage Amplifier Gain
≤0.6V ≤0.6V -6dB
≥1.4V ≤0.6V 0dB
≤0.6V ≥1.4V 3dB
≥1.4V ≥1.4V 6dB
Input Coupling Capacitors
Input coupling capacitors block any DC bias from the audio source and ensure maximum dynamic range. Input coupling capacitors also minimize
PAM8901 / PAM8908 turn-on pop to an inaudible level. The input capacitors are in series with PAM8901 / PAM8908 internal input resistors,
creating a high-pass filter. The following Equation calculates the highpass filter corner frequency
Absolute Maximum Ratings (@TA = +25°C, unless otherwise specified.) (Note 4)
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.
Parameter Rating Unit
Supply Voltage (PVDD) 6.0 V
Input Voltage (INR+, INR-, INL+, INL-) HPVSS -0.3 to HPVDD +0.3 V
Control Interface Voltage (G0, G1, EN) -0.3 to PVDD +0.3 V
Storage Temperature -65 to +150
°C Maximum Junction Temperature +150
Soldering Temperature +250, 10sec
Note: 4. Stresses greater than the 'Absolute Maximum Ratings' specified above may cause permanent damage to the device. These are stress ratings only;
functional operation of the device at these or any other conditions exceeding those indicated in this specification is not implied. Device reliability may be
affected by exposure to absolute maximum rating conditions for extended periods of time.
Recommended Operating Conditions (@TA = +25°C, unless otherwise specified.)
Symbol Parameter Rating Unit
VDD Supply Voltage Range 2.5 to 5.5 V TA Ambient Temperature Range -40 to +85
°C
TJ Junction Temperature Range -40 to +125
Thermal Information (@TA = +25°C, unless otherwise specified.)
Symbol Parameter Package Max Unit
θJA Thermal Resistance (Junction to Ambient) U-QFN3030-16 (Type US) 35 °C/W
θJC Thermal Resistance (Junction to Case) U-QFN3030-16 (Type US) 14 °C/W
NEW PRO
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
16Ω load 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 to
5.5V, has short-circuit and over temperature protection. Shutdown
mode reduces supply current to less than 1µA.
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 1µA 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: U-QFN3030-16 (Type US)
Lead Free and Green Devices Available (RoHS Compliant)
Totally Lead-Free & Fully RoHS Compliant (Notes 1 & 2)
Halogen and Antimony Free. “Green Device (Note 3)