LM4855LQBD National Semiconductor, LM4855LQBD Datasheet
LM4855LQBD
Manufacturer Part Number
LM4855LQBD
Description
BOARD EVALUATION LM4855LQ
Manufacturer
National Semiconductor
Series
Boomer®r
Specifications of LM4855LQBD
Amplifier Type
Class AB
Output Type
1-Channel (Mono) with Stereo Headphones
Max Output Power X Channels @ Load
1.5W x 1 @ 4 Ohms; 115mW x 2 @ 32 Ohms
Voltage - Supply
2.6 V ~ 5 V
Operating Temperature
-40°C ~ 85°C
Board Type
Fully Populated
Utilized Ic / Part
LM4855
Lead Free Status / RoHS Status
Contains lead / RoHS non-compliant
The LM4855 Evaluation Package includes the following:
Hardware Installation Instructions:
SPI Card Instructions:
1) Plug the SPI Card to the parallel port (LPT1) of the PC.
2) Connect the LM4855 Demoboard to the SPI Card with the SPI Cable.
1) Attach the SPI Card to the PC’s parallel port using the SPI Card’s male
2) The LED indicator on the SPI card will light up when a proper
3) Attach the SPI Cable to the SPI Card’s corresponding 6-pin header.
4) The SPI Card can be powered up either through the PC’s parallel port
5) For pcVdd operation, the slide switch on the SPI Card must be set to
6) For extVdd operation, the slide switch on the SPI Card must be set to
CLOCK
V
Refer to the Silkscreen for the corresponding pin locations of CLOCK,
ENB, DATA, V
coding scheme:
DB-25 connector.
connection is made.
(pcVdd) or the LM4855 Demoboard’s power supply (extVdd).
the pcVdd position.
the extVdd position.
DD
LM4855 Evaluation Package Instructions
Silkscreen Pinout
(Green – CLOCK; Blue – ENB; Orange – DATA)
GND
ENB
(White/Green – V
DD
and GND.
DATA
DD
1
; White/Blue – GND)
The SPI Cable uses the following color
White/Green White/Blue
Green
Color Code for SPI Cable
LM4855 Demoboard
Blue
SPI Software
July 10, 2002
SPI Cable
SPI Card
Orange
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LM4855LQBD Summary of contents
Page 1
LM4855 Evaluation Package Instructions The LM4855 Evaluation Package includes the following: Hardware Installation Instructions: 1) Plug the SPI Card to the parallel port (LPT1) of the PC. 2) Connect the LM4855 Demoboard to the SPI Card with the SPI Cable. ...
Page 2
LM4855 Demoboard Instructions: 1) The supply pin, ground pin, inputs, and outputs are all easily accessed through the header pins of the LM4855 Demoboard. Each header pin is labeled accordingly on the Demoboard’s Silkscreen layer. 2) Attach the SPI Cable ...