LM4855LQ National Semiconductor, LM4855LQ Datasheet
LM4855LQ
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LM4855LQ Summary of contents
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... Typical Application FIGURE 1. Typical Audio Amplifier Application Circuit Boomer ® registered trademark of National Semiconductor Corporation. © 2002 National Semiconductor Corporation Key Specifications n THD+N at 1kHz, 1.1W into 8Ω BTL n THD+N at 1kHz, 115mW into 32Ω BTL n Single Supply Operation Features n 1.1W (typ) output power with 8Ω ...
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... SMD Marking (IBL) Top View XY- Date Code TT - Die Traceability G - Boomer Family 55 - LM4855IBL LLP Package Top View Order Number LM4855LQ See NS Package Number LQA24A for Exposed-DAP LLP www.national.com 18-Bump micro SMD Marking (ITL) 200395B0 Order Number LM4855ITL, LM4855IBL See NS Package Number TLA18AAA, BLA18AAB 200395D3 ...
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... Output modes 0V; No loads IN Output modes 0V; Loaded (Fig Output mode SPKR ; R = 4Ω OUT L THD 1kHz, LM4855LQ SPKR ; R = 8Ω OUT L THD 1kHz R and 32Ω OUT OUT L THD+N = 0.5 1kHz SPKR OUT ...
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Electrical Characteristics The following specifications apply for V Symbol Parameter PSRR Power Supply Rejection Ratio SPKR OUT Power Supply Rejection Ratio R and L OUT OUT V Logic High Input Voltage IH V Logic Low Input Voltage IL Digital Volume ...
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... Output modes 0V; No loads IN Output modes 0V; Loaded (Fig Output mode SPKR ; R = 4Ω OUT L THD 1kHz, LM4855LQ SPKR ; R = 8Ω OUT L THD 1kHz R and 32Ω OUT OUT L THD+N = 0.5 1kHz SPKR OUT ...
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Electrical Characteristics The following specifications apply for V Symbol Parameter Digital Volume Range ( Digital Volume Stepsize Digital Volume Stepsize Error Phone_In_IHF Volume Phone _In_IHF Mute Attenuation Phone_In_IHF Input Impedance Phone_In_HS Input Impedance R and L ...
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... THD+N vs Frequency LM4855LQ THD+N vs Frequency Functional Description also creates a highpass filter with the internal resistor voltage and helps maintain the LM4855’s PSRR. DD 200395F0 200395B1 7 (Input Impedance pin and helps maintain DD THD+N vs Frequency LM4855LQ 200395F1 THD+N vs Frequency 200395B2 www.national.com ...
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Typical Performance Characteristics THD+N vs Frequency THD+N vs Frequency THD+N vs Frequency www.national.com (Continued) THD+N vs Frequency 200395B3 THD+N vs Frequency 200395B5 THD+N vs Frequency 200395B7 8 200395B4 200395B6 200395B8 ...
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... Typical Performance Characteristics THD+N vs Output Power LM4855LQ THD+N vs Output Power THD+N vs Output Power (Continued) THD+N vs Output Power 200395F2 THD+N vs Output Power 200395B9 THD+N vs Output Power 200395C1 9 LM4855LQ 200395F3 200395C0 200395C2 www.national.com ...
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Typical Performance Characteristics Power Supply Rejection Ratio Power Supply Rejection Ratio Power Supply Rejection Ratio www.national.com (Continued) Power Supply Rejection Ratio 200395C3 Power Supply Rejection Ratio 200395C5 Power Supply Rejection Ratio 200395C7 10 200395C4 200395C6 200395C8 ...
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Typical Performance Characteristics Output Power vs Supply Voltage Output Power vs Load Resistance Power Dissipation vs Output Power (Continued) Output Power vs Supply Voltage 200395D7 Output Power vs Load Resistance 200395D9 Power Dissipation vs Output Power 200395E1 11 200395D8 200395E0 ...
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Typical Performance Characteristics Supply Current vs Supply Voltage Frequency Response www.national.com (Continued) Channel Separation 200395C9 Frequency Response 200395D4 Frequency Response 200395D6 12 200395D0 200395D5 ...
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Typical Performance Characteristics Output Mode gain from gain from LIN/RIN to LOUT/ROUT A - weighted filter used (Continued) Output Noise vs Output Mode (V = 3V, 5V) DD ...
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APPLICATION INFORMATION SPI PIN DESCRIPTION DATA: This is the serial data input pin. CLK: This is the clock input pin. ENB: This is the SPI enable pin and is active-high. SPI OPERATION DESCRIPTION The serial data bits are organized into ...
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APPLICATION INFORMATION TABLE 3. Volume Control Settings Gain (dB Phone_In_HS OUT OUT OUT OUT -34.5 -40.5 -33.0 -39.0 -31.5 -37.5 -30.0 -360 -28.5 -34.5 -27.0 ...
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... LM4855’s thermal shutdown protection. Further detailed and specific information con- cerning PCB layout and fabrication and mounting an LD (LLP) is found in National Semiconductor’s AN1187. PCB LAYOUT AND SUPPLY REGULATION CONSIDERATIONS FOR DRIVING 3Ω AND 4Ω LOADS Power dissipated by a load is a function of the voltage swing across the load and the load’ ...
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APPLICATION INFORMATION (Continued) highest load dissipation and widest output voltage swing, PCB traces that connect the output pins to a load must be as wide as possible. Poor power supply regulation adversely affects maximum output power. A poorly regulated supply’s ...
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APPLICATION INFORMATION (Continued) voltage, increase the load impedance, or reduce the ambient temperature. If these measures are insufficient, a heat sink can be added to reduce θ . The heat sink can be created JA using additional copper area around ...
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Demonstration Board Layout FIGURE 3. Recommended IBL, ITL PC Board Layout: Top Silkscreen FIGURE 5. Recommended IBL, ITL PC Board Layout: Middle Layer 200395A7 FIGURE 4. Recommended IBL, ITL PC Board Layout: Top Layer 200395A5 FIGURE 6. Recommended IBL, ITL ...
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Demonstration Board Layout FIGURE 7. Recommended LD PC Board Layout: Top Silkcreen Layer FIGURE 9. Recommended LD PC Board Layout: Inner Layer 1 www.national.com (Continued) 200395E5 FIGURE 8. Recommended LD PC Board Layout: Top Layer 200395E7 FIGURE 10. Recommended LD ...
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Demonstration Board Layout FIGURE 11. Recommended LD PC Board Layout: Bottom Layer (Continued) 200395E9 21 www.national.com ...
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Physical Dimensions X www.national.com inches (millimeters) unless otherwise noted 18-Bump mciro SMD Order Number LM4855IBL NS Package Number BLA18AAB Dimensions are in millimeteres ± ± = 1.996 0. 2.225 0. ± = 0.945 ...
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... Physical Dimensions inches (millimeters) unless otherwise noted (Continued) 24-Lead MOLDED PKG, Leadless Leadframe Package LLP Order Number LM4855LQ NS Package Number LQA24A 23 www.national.com ...
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... NATIONAL’S PRODUCTS ARE NOT AUTHORIZED FOR USE AS CRITICAL COMPONENTS IN LIFE SUPPORT DEVICES OR SYSTEMS WITHOUT THE EXPRESS WRITTEN APPROVAL OF THE PRESIDENT AND GENERAL COUNSEL OF NATIONAL SEMICONDUCTOR CORPORATION. As used herein: 1. Life support devices or systems are devices or systems which, (a) are intended for surgical implant ...