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LM4935 Scheda tecnica(PDF) 6 Page - Texas Instruments

Il numero della parte LM4935
Spiegazioni elettronici  Audio Power Amplifier Series Audio Sub-System with Dual-Mode Stereo Headphone & Mono High Efficiency Loudspeaker Amplifiers and Multi-Purpose ADC
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Homepage  http://www.ti.com
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LM4935, LM4935RLEVAL
SNAS296E – OCTOBER 2005 – REVISED MAY 2013
www.ti.com
Table 2-1. PIN DESCRIPTIONS
Pin
Pin Name
Type
Direction
Description
A1
EP_NEG
Analog
Output
Earpiece negative output
A2
A_VDD
Supply
Input
Headphone and mixer VDD
A3
INT_MIC_POS
Analog
Input
Internal microphone positive input
A4
EXT_MIC
Analog
Input
External microphone input
A5
VSAR2
Analog
Input
Input to SAR channel 2
A6
VSAR1
Analog
Input
Input to SAR channel 1
A7
PLL_VSS
Supply
Input
PLL VSS
B1
A_VSS
Supply
Input
Headphone and mixer VSS
B2
EP_POS
Analog
Output
Earpiece positive output
B3
INT_MIC_NEG
Analog
Input
Internal microphone negative input
B4
BYPASS
Analog
Inout
A_VDD/2 filter point
B5
TEST_MODE/CS
Digital
Input
If SPI_MODE = 1, then this pin becomes CS. If SPI_MODE = 0,
and TEST_MODE/CS = 1, then this places the LM4935 into test
mode.
B6
PLL_FILT
Analog
Inout
Filter point for PLL VCO input
B7
PLL_VDD
Supply
Input
PLL VDD
C1
HP_R
Analog
Output
Headphone Right Output
C2
EXT_BIAS
Analog
Output
External microphone supply (2.0/2.5/2.8/3.3V)
C3
INT_BIAS
Analog
Output
2.0V/2.5V ultra-clean supply for internal microphone
C4
AUX_R
Analog
Input
Right Analog Input
C5
GPIO_2
Digital
Inout
General Purpose I/O 2
C6
SDA
Digital
Inout
Control Data, I2C_SDA or SPI_SDI
C7
SCL
Digital
Input
Control Clock, I2C_SCL or SPI_SCK
D1
HP_L
Analog
Output
Headphone Left Output
D2
VREF_FLT
Analog
Inout
Filter point for the microphone power supply
D3
AUX_L
Analog
Input
Left Analog Input
D4
SPI_MODE
Digital
Input
Control mode select 1 = SPI, 0 = I2C (or test)
D5
GPIO_1
Digital
Inout
General Purpose I/O 1
D6
BB_VDD
Supply
Input
Baseband VDD for the digital I/Os
D7
D_VDD
Supply
Input
Digital VDD
E1
HP_VMID
Analog
Inout
Virtual Ground for Headphones in OCL mode, otherwise 1st headset
detection input
E2
HP_VMID_FB
Analog
Inout
VMID Feedback in OCL mode, otherwise a 2nd headset detection
input
E3
MIC_DET
Analog
Input
Headset insertion/removal and Microphone presence detection input
E4
CPI_NEG
Analog
Input
Cell Phone analog input negative
E5
IRQ
Digital
Output
Interrupt request signal (NOT open drain)
E6
I2S_SDO
Digital
Output
I2S Serial Data Out
E7
I2S_SDI
Digital
Input
I2S Serial Data Input
F1
LS_VDD
Supply
Input
Loudspeaker VDD
F2
LS_VDD
Supply
Input
Loudspeaker VDD
F3
CPI_POS
Analog
Input
Cell Phone analog input positive
F4
CPO_NEG
Analog
Output
Cell Phone analog output negative
F5
AUX_OUT_NEG
Analog
Output
Auxiliary analog output negative
F6
I2S_WS
Digital
Inout
I2S Word Select Signal (can be master or slave)
F7
I2S_CLK
Digital
Inout
I2S Clock Signal (can be master or slave)
G1
LS_POS
Analog
Output
Loudspeaker positive output
G2
LS_VSS
Supply
Input
Loudspeaker VSS
G3
LS_NEG
Analog
Output
Loudspeaker negative output
6
Device Information
Copyright © 2005–2013, Texas Instruments Incorporated
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Product Folder Links: LM4935 LM4935RLEVAL


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