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PDF PT2259 Data sheet ( Hoja de datos )
| Número de pieza | PT2259 | |
| Descripción | Volume Controller IC | |
| Fabricantes | PTC | |
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Volume Controller IC
Tel : 886-2-29162151
Fax: 886-2-29174598
http://www.princeton.com.tw
PT2259
Description
PT2259 is an 8-pin 2-channel volume controller which utilizes CMOS technology and incorporates the I2C
interface control. The controller features an attenuation range of 0 to -79dB, low noise output, a high degree of
stereo separation and requires only a small number of external components. PT2259 is an essential component for
modern audio visual systems.
Features
- Attenuation range: 0 to –79dB in 1dB steps
- Operating voltage: 4 to 9V
- Low power consumption
- Low signal noise: S/N > 100dB (A-weighting)
- Stereo separation > 100dB
- Requires few external components
- 2-channel volume individual adjust
- DIP or SO packaging
Applications
- Audio/visual surround sound systems
- Car audio systems
- Mini-compo systems
- Computer multi-media speakers
- Other audio applications
PT2259 v1.0
Page 1
May 2002
Free Datasheet http://www.datasheetlist.com/
1 page  
Volume Controller IC
Tel : 886-2-29162151
Fax: 886-2-29174598
http://www.princeton.com.tw
PT2259
Byte Format
Every byte transmitted to the DATA line consists of 8 bits and each byte must be followed by an “acknowledge”
bit. The MSB is transmitted first.
Acknowledge Signal
During the ninth clock pulse, the microprocessor puts a resistive “high” level on the DATA line. If the peripheral
audio processor (PT2259) acknowledges, it will pull the DATA line from a “high” state to a “low” state during this
acknowledge clock phase 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 address (PT2259) must generate an “acknowledge” signal after receiving each
byte or the DATA line will remain at the “high” level during the ninth clock pulse.
Transmission without Acknowledge
If you do not wish the audio processor (PT2259) to detect the “acknowledge” signal, a simpler microprocessor
transmission method can be used: after PT2259 has received a byte wait for one clock pulse and do not
acknowledge it. If this approach is used, however, there is a greater chance for faulty operations to occur and
noise immunity will be decreased.
PT2259 v1.0
Page 5
May 2002
Free Datasheet http://www.datasheetlist.com/
5 Page 
Volume Controller IC
SPECIFICATIONS
Absolute Maximum Ratings
Symbol
Vcc
Topr
Tstg
Vi
Parameter
Supply Voltage
Operating Temperature
Storage Temperature
Input Voltage
Tel : 886-2-29162151
Fax: 886-2-29174598
http://www.princeton.com.tw
PT2259
Rating
12
-20 ~ 75
-40 ~ 125
-0.3 ~ Vcc + 0.3
Unit
V
°C
°C
V
Electrical Characteristics
(Conditions: Vcc = 9V, Vi = 1Vrms, f = 1kHz, Temp = 27°C)
Symbol
Vcc
Icc
ARANGE
ASTEP
GERR
CERR
Vomax
THD
NO
SNR
Parameter
Testing Conditions
Operating Voltage
Operating Current
Vcc = 9V, Vi = 0V
Volume Attenuation
Minimum attenuation
Range
Maximum attenuation
Attenuation Step
-
Attenuation Step Gain
Error
-
Interchannel
Attenuation Gain Error
-
Maximum Output
Voltage
Vcc = 9V, freq = 1kHz, Volume
Att. = 0dB, Rload = 50KO,
THD<1%
Total Harmonic
Distortion
f = 1kHz, Vol.
Att. = 0dB,
A-weight Rload =
50 KO
Vout = 2Vrms
Vout =
200mVrms
Noise Output
Vin = GND, Mute = OFF, Volume
Att = 0dB, A-weighted
Signal-to-Noise Ratio
Vin = 1Vrms, Att.
= 0dB
No-weighted
A-weighted
Min.
4
-
-
-
-
-
-
2.0
-
-
-
95
110
Typ. Max.
9 12
2.5 3
0-
-79 -
1-
0.5 -
Unit
V
mA
dB
dB
dB
0.5 -
dB
2.3 2.5 Vrms
0.07 0.09
0.003 0.005 %
2 3 µVrms
100 103
120 125
dB
PT2259 v1.0
Page 11
May 2002
Free Datasheet http://www.datasheetlist.com/
11 Page | ||
| Páginas | Total 20 Páginas | |
| PDF Descargar | [ Datasheet PT2259.PDF ] | |
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