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PDF PTC2314 Data sheet ( Hoja de datos )
| Número de pieza | PTC2314 | |
| Descripción | 4-Channel Input Audio Processor | |
| Fabricantes | PTC | |
| Logotipo |  |
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Hay una vista previa y un enlace de descarga de PTC2314 (archivo pdf) en la parte inferior de esta página. Total 18 Páginas | ||
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Princeton Technology Corp.
4-Channel Input Audio Processor
Tel : 886-2-29162151
Fax: 886-2-29174598
URL: http://www.princeton.com.tw
PT2314
Description
PT2314 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
r CMOS Technology
r Least External Components
r Treble and Bass Control
r Loudness Function
r 4 Stereo Inputs with Selectable Input Gain
r Input/Output for External Noise Reduction System/Equalizer
r 2 Independent Speaker Controls for Balance Control
r Independent Mute Function
r Volume Control in 1.25 dB/step
r Low Distortion
r Low Noise and DC Stepping
r Controlled by I2C Bus Micro-Processor Interface
r Available in 28 Pins, DIP/SO Package
Applications
r Car Stereo (Audio)
r Hi-Fi Audio System
Note: Purchase of I2C Component of Princeton Technology Corporation (PTC) conveys a license under Philips I2C Patent Right to use
these components in any I2C System, provided that the system conforms to the I2C Standard Specification defined by Philips
PT2314 v1.1
Page 1
Updated March 1999
Free Datasheet http://www.datasheet4u.com/
1 page  
Princeton Technology Corp.
Tel : 886-2-29162151
Fax: 886-2-29174598
URL: http://www.princeton.com.tw
4-Channel Input Audio Processor
PT2314
Byte Format
Every byte transmitted to the DATA Line consist of 8 bits. Each byte must be followed by an Acknowledge Bit.
The MSB is transmitted first.
Acknowledge
During the Acknowledge Clock Pulse, the master (µP) puts a resistive HIGH level on the DATA Line. The
peripheral (audio processor) that acknowledges has to pull-down (LOW) the DATA line during the
Acknowledge Clock Pulse so that the DATA Line is in a Stable Low State during this Clock Pulse. Please
refer to the diagram below.
The audio processor that has been addressed has to generate an acknowledge after receiving each byte,
otherwise, the DATA Line will remain at the High Level during the ninth (9th) Clock Pulse. In this case, the
master transmitter can generate the STOP Information in order to abort the transfer.
Transmission without Acknowledge
If you want to avoid the acknowledge detection of the audio processor, a simpler µP transmission may be used.
Wait one clock and do not check the slave acknowledge of this same clock then send the new data. If you use
this approach, there are greater chances of faulty operation as well as decrease in noise immunity.
Interface Protocol
The interface protocol consists of the following:
• A Start Condition
• A Chip Address Byte including the PT2314 address. The 8th Bit of the Byte must be “0”. PT2314 must
always acknowledge the end of each transmitted byte.
• A Data Sequence (N-Bytes + Acknowledge)
• A Stop Condition
Please refer to the diagram below:
PT2314 v1.1
Page 5
Updated March 1999
5 Page 
Princeton Technology Corp.
4-Channel Input Audio Processor
Tel : 886-2-29162151
Fax: 886-2-29174598
URL: http://www.princeton.com.tw
PT2314
Speaker
Attenuators
CRANGE
SSTEP
EA
AMUTE
Control Range
Step Resolution
Attenuation Set Error
Output Mute
Attenuation
35 37.5 40
0.5 1.25 1.75
1.5
75 85
Bass Control (1)
Gb
BSTEP
RB
Control Range
Step Resolution
Internal Feedback
Resistance
Max. Boost/Cut
+ 12 + 14 + 16
123
34 44 58
Treble Control (1)
Gt
TSTEP
Control Range
Step Resolution
Max. Boost/Cut
+ 13 + 14 + 15
123
Audio Outputs
VOCL
ROUT
VOUT
Clipping Level
Output Resistance
DC Voltage Level
d=0.3%
2 2.5
1.7 1.9
4.2 4.5
2.1
4.8
General
eNO
S/N
d
Sc
Output Noise
Signal to Noise Ratio
Distortion
Channel Separation
Left/Right
BW==20-20KHz, flat
Output Muted
All gains=0dB
A Curve All Gains=0dB
All Gains=0dB
Vo=1Vrms
AV=0, VIN=1Vrms
AV=-8.75dB, VIN=1Vrms
AV=-8.75dB,
VIN=0.3Vrms
80
-97
-92
-100
95
0.1 0.3
0.07 0.15
0.03 0.1
90
Bus Inputs
VIL
VIH
IIN
Vo
Input Low Voltage
Input High Voltage
Input Current
Output Voltage SDA
Acknowledge
Io=1.6mA
3
-5
1
+5
0.4
dB
dB
dB
dB
dB
dB
KOhms
dB
dB
Vrms
Ohms
V
dB
dB
dB
dB
%
%
%
dB
V
V
uA
V
PT2314 v1.1
Page 11
Updated March 1999
11 Page | ||
| Páginas | Total 18 Páginas | |
| PDF Descargar | [ Datasheet PTC2314.PDF ] | |
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