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PDF CXA2111R Data sheet ( Hoja de datos )
| Número de pieza | CXA2111R | |
| Descripción | LCD Signal Processor (Gamma Correction) | |
| Fabricantes | Sony Corporation | |
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CXA2111R
LCD Signal Processor (Gamma Correction)
Description
The CXA2111R is a signal processor IC developed
for LCD panels. Gamma correction, gain and bias,
etc., can be adjusted using the I2C bus and external
adjustment pins. The output of this IC is ideal as the
input of the CXA2112R (LCD sample-and-hold
driver IC), and the sample-and-hold position, etc.,
can also be adjusted using the I2C bus.
52 pin LQFP (Plastic)
Features
• Independent R, G and B gamma adjustment
• Three-point gamma gain and position adjustment
(one white side point, two black side points)
• Independent R, G and B output amplifier gain and
bias adjustment
• Various I2C bus-based controls and adjustment of
various characteristics by external DC input
• Input signal clamp function (variable clamp voltage)
• Black side limiter adjustment
• CXA2112R adjustment output
• Precharge output (for CXA2112R)
• High frequency response
• High slew rate output
Absolute Maximum Ratings
• Supply voltage
VCC –0.3 to +5.5 V
• Input voltage
VI –0.3 to VCC + 0.3 V
• Storage temperature
Tstg –65 to +150 °C
• Allowable power dissipation
PD 1000 mW
Operating Conditions
• Supply voltage
• Digital input voltage high
• Digital input voltage low
• Operating temperature
VCC
VH
VL
Topr
4.75 to 5.25
2.2 to VCC
0 to 0.8
–20 to +70
V
V
V
V
Applications
• Liquid crystal projectors
• Compact liquid crystal monitors
Structure
Bipolar silicon monolithic IC
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–
E97448-PS
1 page  
CXA2111R
Pin
No.
Symbol
I/O
Typical
pin voltage
20 CLPPLS
L/H
I L: 0 to 0.8V
H: 2.2 to 5V
Equivalent circuit
VCC
300
20
VCC
50µ
21 Vcc
22 RIN
24 GIN
26 BIN
23 ATT
5V
I 1.5 to 3.5V
VCC
22
24
26 300
VCC
170µ
L/H
I L: 0 to 0.8V
H: 2.2 to 5V
VCC
300
23
VCC
50µ
Description
Input signal clamp pulse input.
Set to low when not using the clamp
function.
Pin input
H
L
Clamp function
ON
OFF
5V
R channel input.
G channel input.
B channel input.
Input signal gain control.
This pin also supports 2Vp-p input.
Pin input Clamp block gain Signal level
H 0dB For 1Vp-p
L
–6dB
For 2Vp-p
25 CLPLEV
I 0 to 5V
VCC
VCC
50µ
60k
25
20k
2.5V
Clamp voltage control during clamp
operation.
Pin input
5V
↓
2.5V (open)
↓
0V
Clamp voltage
2.5V
↓
2.0V
↓
1.5V
27 AMPRGAIN
28 AMPGGAIN
29 AMPBGAIN
I
30 AMPRBIAS
0 to 5V
31 AMPGBIAS
32 AMPBBIAS
VCC
2.5V Amplifier gain control.
27 25k
Independent control for R, G and B.
28 Equivalent to 2.5V input when open.
29
VCC
2.5V Amplifier bias control.
30 25k
Independent control for R, G and B.
31 Equivalent to 2.5V input when open.
32
–5–
5 Page 
CXA2111R
Description of Operation
1. Gamma control
The bend positions and respective gains of one
white side point and two black side points can be
varied.
Control is performed independently for R, G and B
by the I2C bus or by external DC.
In addition, the gamma function can easily be
forced OFF (by Pin 13 or the I2C bus).
White gain
Black 1 position
Gamma
OFF
White position
Black 2 position
Black 1 gain
Black 2 gain
2. Amplifier gain and bias control
After adjusting the gamma, the signal gain and DC voltage can also be adjusted.
3. SIDOUT
SIDOUT generates the precharge signal.
After the CXA2111R determines the DC level (Pins 9 and 11) and the pulse width (Pin 10), the signal is
inverted by the CXA2112R and applied to the LCD panel.
See the Example of Representative Characteristics for the DC level.
PRGPLS input
(Pin 10)
Voltage determined by Pin 9
SIDOUT output
(Pin 6)
Output example
Voltage determined by Pin 11
4. I2C bus
The various gamma and amplifier controls can be performed in accordance with the I2C Bus Format table.
In addition, the sample-and-hold position and other items can also be controlled by connecting the
CXA2112R.
– 11 –
11 Page | ||
| Páginas | Total 18 Páginas | |
| PDF Descargar | [ Datasheet CXA2111R.PDF ] | |
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