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Details, datasheet, quote on part number:LM4881MDC
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| Part: | LM4881MDC |
| Category: | Multimedia => Audio => Amplifiers => Preamplifiers => Headphone Amplifiers |
| Description: | LM4881 - Boomer Dual 200 MW Headphone Amplifier With Shutdown Mode, Package: Soic Narrow, Pin Nb=8 |
| Company: | National Semiconductor Corporation |
| Datasheet: | Download LM4881MDC datasheet File size : 435 kB |
| Request For quote: | Find where to buy LM4881MDC
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Datasheet text preview:
LM4881 Dual 200 mW Headphone Amplifier with Shutdown Mode
August 2000
LM4881 Dual 200 mW Headphone Amplifier with Shutdown Mode
General Description
The LM4881 is a dual audio power amplifier capable of delivering 200mW of continuous average power into an 8 load with 0.1% THD+N from a 5V power supply. Boomer audio power amplifiers were designed specifically to provide high quality output power with a minimal amount of external components using surface mount packaging. Since the LM4881 does not require bootstrap capacitors or snubber networks, it is optimally suited for low-power portable systems. The LM4881 features an externally controlled, low power consumption shutdown mode which is virtually clickless and popless, as well as an internal thermal shutdown protection mechanism. The unity-gain stable LM4881 can be configured by external gain-setting resistors.
Key Specifications
j THD+N at 1kHz at 125mW
continuous average output power into 8
j THD+N at 1kHz at 75mW
0.1% (max)
continuous average output power into 32
j Output power at 10% THD+N
0.02% (typ) 300mW (typ) 0.7µA (typ) 2.7V to 5.5V
at 1kHz into 8
j Shutdown Current j Supply voltage range
Features
n n n n n MSOP surface mount packaging Unity-gain stable External gain configuration capability Thermal shutdown protection circuitry No bootstrap capacitors, or snubber circuits are necessary
Applications
n Headphone Amplifier n Personal Computers n Microphone Preamplifier
Typical Application
Connection Diagrams
MSOP Package
DS100005-2
SOP and DIP Package
DS100005-1
*Refer to the Application Information Section for information concerning proper selection of the input and output coupling capacitors.
DS100005-38
FIGURE 1. Typical Audio Amplifier Application Circuit
Top View Order Number LM4881MM, LM4881M, or LM4881N See NS Package Number MUA08A, M08A, or N08E
Boomer ® is a registered trademark of National Semiconductor Corporation.
© 2001 National Semiconductor Corporation
DS100005
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LM4881
Absolute Maximum Ratings (Note 3)
If Military/Aerospace specified devices are required, please contact the National Semiconductor Sales Office/ Distributors for availability and specifications. Supply Voltage Storage Temperature Input Voltage Power Dissipation (Note 4) ESD Susceptibility (Note 5) ESD Susceptibility (Note 6) Junction Temperature Soldering Information (Note 1) Small Outline Package Vapor Phase (60 seconds) Infrared (15 seconds) 6.0V -65°C to +150°C -0.3V to VDD + 0.3V Internally limited 3500V 250V 150°C
Thermal Resistance JC (MSOP) JA (MSOP) JC (SOP) JA (SOP) JC (DIP) JA (DIP)
56°C/W 210°C/W 35°C/W 170°C/W 37°C/W 107°C/W
Operating Ratings
Temperature Range TMIN TA TMAX Supply Voltage -40°C T A 85°C 2.7V VDD 5.5V
215°C 220°C
Note 1: See AN-450 "Surface Mounting and their Effects on Product Reliability" for other methods of soldering surface mount devices.
Electrical Characteristics (Notes 2, 3)
The following specifications apply for VDD = 5V unless otherwise specified. Limits apply for TA = 25C. Symbol VDD IDD ISD VOS PO Parameter Power Supply Voltage Quiescent Current Shutdown Current Offset Voltage Output Power VIN = 0V, IO = 0A VPIN1 = VDD VIN = 0V THD = 0.1% (max); f = 1 kHz; RL = 8 RL = 16 RL = 32 THD + N = 10%; f = 1 kHz; RL = 8 RL = 16 RL = 32 THD+N Total Harmonic Distortion + Noise RL = 16, P
O
Conditions
LM4881 Typ (Note 7) Limit (Note 8) 2.7 5.5 3.6 0.7 5 200 150 85 300 200 110 6.0 5 50 125
Units (Limits) V (min) V (max) mA (max) µA (max) mV (max) mW (min) mW mW mW mW mW % % dB
= 120 mWrms;
0.025 0.02 50
RL = 32, PO = 75 mWrms; f = 1 kHz CB = 1.0 µF, VRIPPLE = 200 mVrms, f = 120Hz
PSRR
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LM4881
Electrical Characteristics (Notes 2, 3) The following specifications apply for VDD = 3V unless otherwise specified. Limits apply for TA = 25C.
Symbol IDD ISD VOS PO Parameter Quiescent Current Shutdown Current Offset Voltage Output Power Conditions VIN = 0V, IO = 0A VPIN1 = VDD VIN = 0V THD = 1% (max); f = 1 kHz; RL = 8 RL= 16 RL = 32 THD + N = 10%; f = 1 kHz; RL = 8 RL = 16 RL = 32 THD+N Total Harmonic Distortion + Noise Power Supply Rejection Ratio RL = 16, P
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LM4881 Typ (Note 7) 1.1 0.7 5 Limit (Note 8)
Units (Limits) mA µA mV
70 65 30
mW mW mW
95 65 35 = 60 mWrms; 0.2 0.03 50
mW mW mW % % dB
RL = 32, PO = 25 mWrms; f = 1 kHz CB = 1.0 µF, VRIPPLE = 200 mVrms, f = 100 Hz
PSRR
Note 2: All voltages are measured with respect to the ground pin, unless otherwise specified. Note 3: Absolute Maximum Ratings indicate limits beyond which damage to the device may occur. Operating Ratings indicate conditions for which the device is functional, but do not guarantee specific performance limits. Electrical Characteristics state DC and AC electrical specifications under particular test conditions which guarantee specific performance limits. This assumes that the device is within the Operating Ratings. Specifications are not guaranteed for parameters where no limit is given, however, the typical value is a good indication of device performance. Note 4: The maximum power dissipation must be derated at elevated temperatures and is dictated by TJMAX, JA, and the ambient temperature TA. The maximum allowable power dissipation is P DMAX = (TJMAX - TA) / JA. For the LM4881, TJMAX = 150°C, and the typical junction-to-ambient thermal resistance, when board mounted, is 210°C/W for the MSOP Package and 107°C/W for package N08E. Note 5: Human body model, 100 pF discharged through a 1.5 k resistor. Note 6: Machine Model, 220 pF 240 pF discharged through all pins. Note 7: Typicals are measured at 25°C and represent the parametric norm. Note 8: Limits are guaranteed to National's AOQL (Average Outgoing Quality Level).
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