LM4857SPBD National Semiconductor, LM4857SPBD Datasheet
LM4857SPBD
Manufacturer Part Number
LM4857SPBD
Description
BOARD EVALUATION LM4857SP
Manufacturer
National Semiconductor
Series
Boomer®r
Specifications of LM4857SPBD
Amplifier Type
Class AB
Output Type
2-Channel (Stereo) with Stereo Headphones
Max Output Power X Channels @ Load
1.6W x 2 @ 4 Ohm; 75mW x 2 @ 32 Ohm
Voltage - Supply
2.7 V ~ 5.5 V
Operating Temperature
-40°C ~ 85°C
Board Type
Fully Populated
Utilized Ic / Part
LM4857
Lead Free Status / RoHS Status
Contains lead / RoHS non-compliant
The LM4857 Evaluation Package includes the following:
Hardware Installation Instructions:
I
2
C Card Instructions:
1) Plug the I
2) Connect the LM4857 Demoboard to the I
1) Attach the I
2) The LED indicator on the I
3) Attach the I
4) The I
5) For pcVdd operation, the slide switch on the I
6) For extVdd operation, the slide switch on the I
extV
SCL
Refer to the Silkscreen for the corresponding pin locations of SCL,
SDA, extV
scheme:
DB-25 connector.
connection is made.
(pcVdd) or the LM4857 Demoboard’s power supply (extVdd).
the pcVdd position.
the extVdd position. The extVdd supply is generated through the
I
power supply pin Vdd by closing jumper (J2).
I
2
2
CVdd pin on the demoboard, which can be shorted to the main
C Silkscreen Pinout
DD
LM4857 Evaluation Package Instructions
2
C Card can be powered up either through the PC’s parallel port
GND
(White/Green – extV
(Green – SCL; Blue – NC; Orange – SDA)
2
NC
C Card to the parallel port (LPT1) of the PC.
DD
2
2
C Card to the PC’s parallel port using the I
C Cable to the I
and GND. The I
SDA
NC
2
C card will light up when a proper
2
C Card’s corresponding 6-pin header.
DD
1
2
C Cable uses the following color coding
; White/Blue – GND)
White/Green White/Blue
Green
Color Code for I
2
C Card with the I
2
2
C Card must be set to
C Card must be set to
LM4857 Demoboard
Blue
December 12, 2003
2
C Card’s male
2
C Cable
2
I
C Cable.
2
Software
I
C Cable
Orange
2
C Card
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LM4857SPBD Summary of contents
Page 1
LM4857 Evaluation Package Instructions The LM4857 Evaluation Package includes the following: Hardware Installation Instructions Plug the I C Card to the parallel port (LPT1) of the PC. 2) Connect the LM4857 Demoboard to the I Refer to the ...
Page 2
LM4857 Demoboard Instructions: 1) The supply pin, ground pin, inputs, and outputs are all easily accessed through the header pins of the LM4857 Demoboard. Each header pin is labeled accordingly on the Demoboard’s Silkscreen layer Attach the I ...