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ET2314 Schematic ( PDF Datasheet ) - ETEK

Teilenummer ET2314
Beschreibung 4-Channel Input Audio Processor
Hersteller ETEK
Logo ETEK Logo 




Gesamt 11 Seiten
ET2314 Datasheet, Funktion
Etek
Microelectronics
ET2314
4-Channel Input Audio Processor
General Description
ET2314 is a four-channel input digital audio processor utilizing CMOS Technology. Volume, Bass, Treble
and Balance are incorporated into a single chip. Loudness Function and Selectable Input Gain are also provided to
build a highly effective electronic audio processor having the highest performance and reliability with the least
external components. All functions are programmable using the I2C Bus. The pin assignments and application
circuit are optimized for easy PCB layout and cost saving advantage for audio application.
Features
z CMOS Technolog
z Least External Components
z Treble and Bass Control
z Loudness Function
z 4 Stereo Inputs with Selectable Input Gain
z Input/Output for External Noise Reduction System/Equalizer
z 2 Independent Speaker Controls for Balance Control
z Independent Mute Function
z Volume Control in 1.25 dB/step
z Low Distortion
z Low Noise and DC Stepping
z Controlled by I2C Bus Micro-Processor Interface
z Package: SOP28
Applications
z Car Stereo (Audio)
z Hi-Fi Audio System
1/11
Rev 1.0 2009-12-07
Free Datasheet http://www.datasheet-pdf.com/






ET2314 Datasheet, Funktion
ET2314
Speaker Attenuators
The table below gives a detailed description of the speaker attenuators data bytes. For example, an
attenuation of 30dB on the Speaker R (Right) is given by: 1 1 1 1 1 0 0 0.
MSB
1
1
1
1
LSB
0 B1 B0 A2 A1 A0
1 B1 B0 A2 A1 A0
000
001
010
011
100
101
110
111
00
01
10
11
11111
FUNCTION
Speaker L
Speaker R
0
-1.25
-2.5
-3.75
-5
-6.25
-7.5
-8.75
0
-10
-20
-30
Mute
Audio Switch Data Byte
The following table shows the detailed description of the Audio Switch Data Bytes. For example, a Stereo 1
Input with Gain of +11.25 dB Loudness ON is given by: 0 1 0 0 0 0 0 0.
MSB
0
1
LSB
0 G1 G0 S2 S1
S0
00
01
10
11
0
1
00
01
10
11
FUNCTION
Audio Switch
Stereo 1
Stereo 2
Stereo 3
Stereo 4
Loudness ON
Loudness OFF
+11.25dB
+7.5dB
+3.75dB
0dB
Bass and Treble Data Bytes
The following table shows a detailed description of the Bass and Treble Data Byte. For example a Treble at
12dB is given by : 0 1 1 1 0 0 0 1.
MSB
LSB
0 1 1 0 C3 C2 C1 C0
0 1 1 1 C3 C2 C1 C0
000
0
FUNCTION
Bass
Treble
-14
6/11
Rev 1.0 2009-12-07
Free Datasheet http://www.datasheet-pdf.com/

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