lm48823tlx National Semiconductor Corporation, lm48823tlx Datasheet - Page 14

• Manufacturer Part Number: lm48823tlx
• Description: Mono, Bridge-tied Load, Ceramic Speaker Driver With I2c Volume Control And Reset
• Manufacturer: National Semiconductor Corporation

www.national.com
PCB Layout Guidelines
Minimize trace impedance of the power, ground and all output
traces for optimum performance. Voltage loss due to trace
resistance between the LM48823 and the load results in de-
creased output power and efficiency. Trace resistance be-
tween the power supply and ground has the same effect as a
poorly regulated supply, increased ripple and reduced peak
output power. Use wide traces for power supply inputs and
amplifier outputs to minimize losses due to trace resistance,
as well as route heat away from the device. Proper grounding
LM48823TL Demoboard Bill of Materials
Designator
LM4823TL
JU1 – JU5
JU6, JU7
C3 – C5
C1, C2
C7, C8
C6
J1
Quantity
2
3
1
2
5
3
1
1
2.2µF ±10% 10V X5R Ceramic Capacitor (603) Panasonic
ECJ-1VB1A225K Murata GRM033R6OJ104KE19D
1µF ±10% 10V Tantalum Capacitor (402) AVX TACK105M010QTA
4.7µF ±10% 6.3V X5R Ceramic Capacitor (603) Panasonic
ECJ-1VB0J475K Murata GRM188R6OJ475KE19D
0.1µF ±10% 6.3V X5R Ceramic Capacitor (201) Panasonic ECJ-
ZEB0J104K Murata GRM188R61A225KE34D
2 Pin Header
2 Pin Header
5-Pin I
LM48823TL (16-Bump microSMD)
2
C Header
14
improves audio performance, minimizes crosstalk between
channels and prevents switching noise from interfering with
the audio signal. Use of power and ground planes is recom-
mended.
Place all digital components and route digital signal traces as
far as possible from analog components and traces. Do not
run digital and analog traces in parallel on the same PCB lay-
er. If digital and analog signal lines must cross either over or
under each other, ensure that they cross in a perpendicular
fashion.
Description