PAM890825MW
功率25mw
较小包装3000
品牌pam
库存情况现货
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The SGND pin is an input reference and must be connected to the headphone ground connector pin. This ensures no turn-on pop and minimizes
output offset voltage. Do not connect more than ±0.3V to SGND.
PGND is a power ground. Connect supply decoupling capacitors for PVDD, HPVDD, and HPVSS to PGND.
Power Supply Connections
Connect the supply voltage to the PVDD pin and decouple it with an X5R or better capacitor. Place both PVDD capacitors within 5mm of PVDD
pin on the PAM8901 / PAM8908. Ensure that the ground connection of PVDD capacitor has a minimum length return path to the device. Failure to
properly decouple the PAM8901 / PAM8908 may degrade audio or EMC performance.
NEW PRODUCT
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
Pin Descriptions
Pin Number
Pin Name I/O/P Function
PAM8901 PAM8908
1 1 INL- I Inverting left input for differential **s. 2 2 INL+ I Non-inverting left input for differential **s.
3 3 INR+ I Inverting right input for differential **s. 4 4 INR- I Non-inverting right input for differential **s. 5 6 G0 I Gain select bit 0 6 7 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 amplifier 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
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
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)
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