LM48556

Manufacturer Part NumberLM48556
ManufacturerTexas Instruments
LM48556 datasheet
 


Specifications of LM48556

Supply Min(min)(volt)2.7Supply Max(max)(volt)5
Voltage Output Pk To Pk(v)14.2Pin/package12DSBGA
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LM48556
LM48556
Fully Differential, Mono, Ceramic Speaker Driver
Literature Number: SNAS452A

LM48556 Summary of contents

  • Page 1

    ... LM48556 LM48556 Fully Differential, Mono, Ceramic Speaker Driver Literature Number: SNAS452A ...

  • Page 2

    ... Flexible power supply requirements allow operation from 2.7V to 5.0V. Additionally, the LM48556 features a dif- ferential input function and an externally configurable gain. A low power shutdown mode reduces supply current consump- tion to 0.1μ ...

  • Page 3

    Typical Application www.national.com FIGURE 1. Typical Audio Amplifier Application Circuit 2 300572d4 ...

  • Page 4

    ... Connection Diagrams 12 Bump micro SMD Top View Order Number LM48556TL, LM48556TLX See NS Package Number TLA121AA 12 Bump micro SMD Package View 3 300572d6 30057231 www.national.com ...

  • Page 5

    ... Package 12 bump micro LM48556TL SMD 12 bump micro LM48556TLX SMD www.national.com LM48556TL Marking Top View XY = Date Code TT = Lot Traceability G = Boomer Family K4 = LM48556TL Name OUT- Amplifier Inverting Output SV Signal Power Supply - Positive DD IN+ Amplifier Non-inverting Input SV Signal Power Supply - Negative SS OUT+ Amplifier Non-inverting Output ...

  • Page 6

    ... LM48556 Typical Limit (Note 6) (Note 7) 4.8 7 0.1 1 0.6 4 0.5 14.2 11.5 11 0.005 0. 1.2 0.45 = 15Ω+1μF, unless otherwise = 20kΩ), LM48556 Typical Limit (Note 6) (Note 7) 6.5 10 0.1 1 0.6 4 0.5 17.5 14.6 14 0.005 0.03 8 www.national.com 150°C 114°C/W ≤ +85°C A ≤ 5.0V DD Units (Limits) mA (max) µA (max) ...

  • Page 7

    ... Conditions V = 200mV , f = 217Hz, RIPPLE PP Input Referred ) / θ the number given in Absolute Maximum Ratings, whichever is lower +25ºC, and at the Recommended Operation Conditions at the time of product A 6 LM48556 Typical Limit (Limits) (Note 6) (Note (min (min) 1.2 V (min) 0.45 V (max) , θ ...

  • Page 8

    Typical Performance Characteristics = 15Ω+1μ 20dB 22kHz THD+N vs Frequency V = 2.7V THD+N vs Frequency V = 4.5V 17. THD+N vs Output ...

  • Page 9

    CMRR vs Frequency V = 2.7V, Input referred DD CMRR vs Frequency V = 4.5V, Input referred DD PSRR vs Frequency V = 3.6V, Input referred DD www.national.com CMRR vs Frequency V = 3.6V, Input referred DD 300572d0 PSRR vs ...

  • Page 10

    Output Voltage vs Frequency V = 2.7V, THD Output Voltage vs Frequency V = 4.5V, THD Power Consumption vs Output Voltage Swing ≤ 2.7V, THD Output Voltage vs Frequency V ...

  • Page 11

    Power Consumption vs Output Voltage Swing ≤ 4.5V, THD 300572e6 ...

  • Page 12

    ... A lower value ca- pacitor can be used in systems with low maximum output power requirements. Gain Setting Resistor Selection The amplifier gain of the LM48556 is set by four external re- sistors, two per each input, R IN_ amplifier gain is given by equation (1): ...

  • Page 13

    ... Where the value determined by equation (1) in the IN Gain Setting Resistor Selection section. When the LM48556 is using a single-ended source, power supply noise on the ground is seen as an input signal. Setting the high-pass filter point above the power supply noise fre- www.national.com quencies, 217Hz in a GSM phone, for example, filters out the noise such that it is not amplified and heard on the output ...

  • Page 14

    ... Header, 2–Pin Header 2 Resistor 200kΩ Resistor 200kΩ Resistor 200kΩ Resistor 200kΩ Header, 2–Pin Header 2 Header, 2–Pin Header 2 Header, 3–Pin 3–pole jumper Designator Footprint LM48556TL LM48556TL C1 CR3216-1206 C CR2012-0805 F+ C CR2012-0805 F- C CR2012-0805 IN+ C CR2012-0805 IN- C CR3216-1206 S1 C CR2012-0805 ...

  • Page 15

    Demonstration Board Schematic www.national.com FIGURE 3: Demo Board Schematic 14 300572b0 ...

  • Page 16

    Demonstration Board PCB Views FIGURE 4: Top Overlay FIGURE 5: Top Layer 15 300572b6 300572b5 www.national.com ...

  • Page 17

    FIGURE 6: Mid Layer 1 FIGURE 7: Mid Layer 2 16 300572b3 300572b4 ...

  • Page 18

    FIGURE 8: Bottom Overlay FIGURE 9: Bottom Layer 17 300572b2 300572b1 www.national.com ...

  • Page 19

    Revision History Rev Date 1.0 06/03/08 1.01 12/09/08 www.national.com Description Initial release. Changed Power Supply Voltage Limits from 4.5V to 5.0V. 18 ...

  • Page 20

    ... Physical Dimensions inches (millimeters) unless otherwise noted 12 Bump micro SMD Order Number LM48556TL, LM48556TLX NS Package Number TLA121AA = 1488μ 1996μm, = 600μ www.national.com ...

  • Page 21

    For more National Semiconductor product information and proven design tools, visit the following Web sites at: Products Amplifiers www.national.com/amplifiers Audio www.national.com/audio Clock and Timing www.national.com/timing Data Converters www.national.com/adc Interface www.national.com/interface LVDS www.national.com/lvds Power Management www.national.com/power Switching Regulators www.national.com/switchers LDOs www.national.com/ldo ...

  • Page 22

    ... Texas Instruments Incorporated and its subsidiaries (TI) reserve the right to make corrections, modifications, enhancements, improvements, and other changes to its products and services at any time and to discontinue any product or service without notice. Customers should obtain the latest relevant information before placing orders and should verify that such information is current and complete. All products are sold subject to TI’ ...