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PDF PT2258 Data sheet ( Hoja de datos )
| Número de pieza | PT2258 | |
| Descripción | 6-Channel Electronic Volume Controller IC | |
| Fabricantes | Princeton Technology Corp | |
| Logotipo |  |
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DESCRIPTION
PT2258 is a 6-Channel Electronic Volume Controller
IC utilizing CMOS Technology specially designed for
the new generation of AV Multi-Channel Audio
System. PT2258 provides an I2C Control Interface, an
attenuation range of 0 to -79dB at 1dB/step, low noise,
and high channel separation. Housed in 20 pins, DIP
or SOP, PT2258’s pin assignments and application
circuit are optimized for easy PCB Layout and cost
saving advantages.
APPLICATIONS
AV Surround Audio Equipment
Car Audio
Mini Compo
Computer Multi-Media Speaker
Other Audio Equipments
BLOCK DIAGRAM
PT2258
6-Channel Electronic Volume
Controller IC
FEATURES
CMOS Technology
Low Power Consumption
Least External Components
Attenuation Range: 0 to -79dB at 1dB/step
Operating Voltage: 5 to 9 V
Low Noise, S/N Ratio>100dB (A-weighting)
High Channel Separation
I2C Bus Control Interface
Selectable Address
6-Channel Outputs
Available in 20 pins, DIP or SOP
Tel: 886-66296288‧Fax: 886-29174598‧ http://www.princeton.com.tw‧2F, No.233-1, Baociao Rd., Sindian Dist., New Taipei City 23145, Taiwan
1 page  
PT2258
FUNCTIONAL DESCRIPTION
BUS INTERFACE
Data are transmitted to and from the microprocessor to the PT2258 via the SDA and SCL. The SDA and SCL make up
the BUS Interface. It should be noted that the pull-up resistors must be connected to the positive supply voltage.
DATA VALIDITY
A data on the SDA Line is considered valid and stable only when the SCL Signal is in HIGH State. The HIGH and LOW
States of the SDA Line can only change when the SCL signal is LOW. Please refer to the figure below.
START AND STOP CONDITIONS
A Start Condition is activated when
1) the SCL is set to HIGH and
2) SDA shifts from HIGH to LOW State.
The Stop Condition is activated when
1) SCL is set to HIGH and
2) SDA shifts from LOW to HIGH State.
Please refer to the timing diagram below.
BYTE FORMAT
Every byte transmitted to the SDA Line consists of 8 bits. Each byte must be followed by an Acknowledge Bit. The MSB
is transmitted first.
V1.3
5 March 2014
5 Page 
PT2258
ABSOLUTE MAXIMUM RATINGS
Symbol
Vs
Topr
Parameter
Supply Voltage
Operation Temperature
Ratings
12
-40～+85
Tstg
Storage Temperature
-65～+150
Unit
V
℃
℃
ELECTRICAL CHARACTERISTICS
(VDD=9V, VI=1Vrms, f=1 KHz, Temp=27℃)
Symbol
Parameter
Conditions
VDD Supply Voltage
Is Supply Current
RIN Input Impedance
FL, FR, CTR, SUB, SL, SR
VCL Max. Input Voltage
Volume=0dB, THD=1%
Sc Channel Separation
Crange Volume Control Range
Avmax
Max. Attenuation
Astep
Attenuation Step
EA Attenuation Error
Volume=0～-50dB
AMUTE
Mute Attenuation
A-weighting
THD Total Harmonic Distortion
Volume=0dB, input 200mVrms
Noise
Output Noise
A-weighting
S/N Signal-Noise Ratio
0dB=1Vrms, A-weighting
Ro Output Impendance
Go Output Gain
Vomax
I2C Section
Max. Output Voltage
FL, FR, CENTER, SUB, SL, SR
THD=1%
VIL Bus Low Input Level
VIH Bus High Input Level
TINIT
Bus Initialization
Cref=10μF
Min.
5
7
22
90
-1.0
90
0.003
100
-0.5
2.3
Typ.
9
10
33
2.8
100
79
-79
1
0
95
0.005
3
105
600
0
2.5
Max.
10
12
42
3.0
110
+1.0
98
0.01
5
110
900
+0.5
2.8
Unit
V
mA
KΩ
Vrms
dB
dB
dB
dB
dB
dB
%
μV
dB
Ω
dB
Vrms
2.4 2.5 V
2.8 3.0
V
250 300 mS
V1.3
11 March 2014
11 Page | ||
| Páginas | Total 14 Páginas | |
| PDF Descargar | [ Datasheet PT2258.PDF ] | |
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