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PDF CXA2125Q Data sheet ( Hoja de datos )
| Número de pieza | CXA2125Q | |
| Descripción | Audio/Video Switch with Electronic Volume for 3 Scart | |
| Fabricantes | Sony Corporation | |
| Logotipo |  |
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CXA2125Q
Audio/Video Switch with Electronic Volume for 3 Scart
Description
The CXA2125Q is an I2C programmable audio, video
switch designed primarily for set top box applications. It
interfaces from digital encoder sources to TV, VCR and
auxiliary scart connectors.
Features
• 3 scart independent audio/video switching (TV, VCR,
AUX)
• 0 to –63dB volume control with click noise reduction
• 5 stereo audio inputs
• I2C control
• Scart Function Switching input and output
• Scart Fast Blanking for OSD
• Mono switchable to stereo on TV, VCR and AUX outputs
• On-chip +12V to +9V voltage regulator
• Logic output
• Selectable +6dB, +12dB gain on TV output
• RGB input on VCR scart
• Compatible with 2 scart Audio/Video switch CXA2126Q
Applications
Digital Set Top Box
Structure
Bipolar silicon monolithic IC
Absolute Maximum Ratings
• Supply voltage
VCC
• Operating temperature Topr
• Storage temperature Tstg
• Allowable power dissipation
PD
12
–20 to +75
–65 to +150
850
V
°C
°C
mW
Operating Conditions
• Supply voltage
• Operating voltage
10.7 to 12
9 ± 0.5
V
V
64 pin QFP (Plastic)
Sony reserves the right to change products and specifications without prior notice. This information does not convey any license by
any implication or otherwise under any patents or other right. Application circuits shown, if any, are typical examples illustrating the
operation of the devices. Sony cannot assume responsibility for any problems arising out of the use of these circuits.
–1–
E99338-PS
1 page  
CXA2125Q
Pin
No.
Symbol
Pin
voltage
Equivalent circuit
Description
40 RTV
34 ROUT1
31 ROUT2
42 LTV
36 LOUT1
4.5V
32 LOUT2
35 PHONO_R
37 PHONO_L
33 MONO
VCC = 12V
35 31
37 42
33 36
40 32
34
22kΩ
20kΩ
55Ω
VCC = 9V
33µA
20kΩ
33µA
Audio signal outputs.
A coupling capacitor may
be used.
(typ = 10µF)
BIAS_
62 VIDEO
3.9V
VCC = 12V
62
11kΩ
VCC = 9V
14µA
200Ω
9kΩ
Reference Bias for video
circuit.
Connected to GND with
capacitor.
(typ = 47µF)
BIAS_
19 AUDIO
4.5V
VCC = 12V
20kΩ
19
20kΩ
VCC = 9V
Reference Bias for audio
circuit.
Connected to GND with
capacitor.
(typ = 22µF)
7µA
30 FNC_TV
—
VCC = 12V
120Ω
15kΩ
30
3kΩ
–5–
I2C controlled output
giving 0V, 6V or 12V.
5 Page 
CXA2125Q
Item Symbol
Conditions
DC offset
Voff
Offset voltage between input and
output (Fig. 5)
Input impedance
RIN2, 3, 4, 5 LIN2, 3, 4, 5
Zin1
(excluding any external series resistor)
Input impedance
RIN1/LIN1
Zin2 (excluding any external series resistor)
Output impedance
Zout (excluding any external series resistor)
Phase difference
Vpda
f = 1kHz, 1Vrms input to two channels.
Phase difference of stereo output
measured
S/N ratio
S/NA
f = 1kHz, 1Vrms input (at maximum
volume).
HPF @20Hz, LPF@20kHz. (Fig. 6)
Electronic Volume Control
Fine volume attenuation
step
AEVC
f = 1kHz, 0.5Vrms input. Set by I2C.
(Fig.6)
Coarse volume attenuation
step
AEVF
f = 1kHz, 0.5Vrms input. Set by I2C.
(Fig.6)
Mute
Amute f = 1kHz, 1Vrms input. (Fig.6)
DC Offset -RTV, LTV
VoffTV
Offset voltage between any audio input
and RTV, LTV outputs. (Fig.5)
Min. Typ. Max. Unit
–30 — +30 mV
— 66 — kΩ
— 33 — kΩ
— 10 — Ω
— 0.05 — Deg
80 90 — dB
0.6 1 1.4 dB
7.5 8 8.5 dB
— — –80 dB
–30 0 +30 mV
– 11 –
11 Page | ||
| Páginas | Total 30 Páginas | |
| PDF Descargar | [ Datasheet CXA2125Q.PDF ] | |
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