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PDF EL5126 Data sheet ( Hoja de datos )

Número de pieza EL5126
Descripción 8-Channel TFT-LCD Reference Voltage Generator
Fabricantes Intersil Corporation 
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No Preview Available ! EL5126 Hoja de datos, Descripción, Manual

®
Data Sheet
August 24, 2006
EL5126
FN7337.2
8-Channel TFT-LCD Reference Voltage
Generator
The EL5126 is designed to produce
the reference voltages required in
TFT-LCD applications. Each output is
programmed to the required voltage with 10 bits of
resolution. Reference pins determine the high and low
voltages of the output range, which are capable of swinging
to either supply rail. Programming of each output is
performed using the serial interface.
A number of the EL5126 can be stacked for applications
requiring more than 8 outputs. The reference inputs can be
tied to the rails, enabling each part to output the full voltage
range, or alternatively, they can be connected to external
resistors to split the output range and enable finer
resolutions of the outputs.
The EL5126 has 8 outputs and is available in a 32 Ld QFN
package. It is specified for operation over the full -40°C to
+85°C temperature range.
Ordering Information
PART
NUMBER
TAPE
PART
AND
MARKING PACKAGE REEL
PKG. NO.
EL5126CL
5126CL 32 Ld QFN - MDP0046
EL5126CLZ
(Note)
5126CLZ 32 Ld QFN
(Pb-free)
- MDP0046
EL5126CL-T7 5126CL 32 Ld QFN 7” MDP0046
EL5126CLZ-T7 5126CLZ 32 Ld QFN
(Note)
(Pb-free)
7” MDP0046
EL5126CL-T13 5126CL 32 Ld QFN 13” MDP0046
EL5126CLZ-T13 5126CLZ 32 Ld QFN 13” MDP0046
(Note)
(Pb-free)
NOTE: Intersil Pb-free plus anneal products employ special Pb-free
material sets; molding compounds/die attach materials and 100%
matte tin plate termination finish, which are RoHS compliant and
compatible with both SnPb and Pb-free soldering operations. Intersil
Pb-free products are MSL classified at Pb-free peak reflow
temperatures that meet or exceed the Pb-free requirements of
IPC/JEDEC J STD-020.
Features
• 8-channel reference outputs
• Accuracy of ±0.1%
• Supply voltage of 4.5V to 16.5V
• Digital supply 3.3V to 5V
• Low supply current of 10mA
• Rail-to-rail capability
• I2C control interface
Applications
• TFT-LCD drive circuits
• Reference voltage generators
Pinout
EL5126
(32 LD 5X6 QFN)
TOP VIEW
VS 1
VSD 2
VS 3
REFH 4
REFL 5
AGND 6
CAP 7
NC 8
VS 9
THERMAL
PAD
25 OUTA
24 OUTB
23 OUTC
22 OUTD
21 DGND
20 OUTE
19 OUTF
18 OUTG
17 OUTH
1 CAUTION: These devices are sensitive to electrostatic discharge; follow proper IC Handling Procedures.
1-888-INTERSIL or 321-724-7143 | Intersil (and design) is a registered trademark of Intersil Americas Inc.
Copyright © Intersil Americas Inc. 2003. All Rights Reserved. Elantec is a registered trademark of Elantec Semiconductor, Inc.
All other trademarks mentioned are the property of their respective owners.

1 page




EL5126 pdf
Typical Performance Curves (Continued)
EL5126
OUTPUT
SCLK
SDA
M=400µs/DIV
JEDEC JESD51-7 HIGH EFFECTIVE THERMAL
CONDUCTIVITY TEST BOARD - LPP EXPOSED
DIEPAD SOLDERED TO PCB PER JESD51-5
3
2.857W
2.5
2
1.5
1
0.5
0
0 25 50 75 85 100 125 150
AMBIENT TEMPERATURE (°C)
FIGURE 9. SMALL SIGNAL RESPONSE (FALLING FROM
200mV TO 0V)
FIGURE 10. POWER DISSIPATION vs AMBIENT
TEMPERATURE
JEDEC JESD51-3 AND SEMI G42-88
(SINGLE LAYER) TEST BOARD
0.8
0.7 758mW
0.6
0.5
0.4
0.3
0.2
0.1
0
0 25 50 75 85 100 125
AMBIENT TEMPERATURE (°C)
150
FIGURE 11. POWER DISSIPATION vs AMBIENT TEMPERATURE
General Description
The EL5126 provides a versatile method of providing the
reference voltages that are used in setting the transfer
characteristics of LCD display panels. The V/T
(Voltage/Transmission) curve of the LCD panel requires that
a correction is applied to make it linear; however, if the panel
is to be used in more than one application, the final curve
may differ for different applications. By using the EL5126,
the V/T curve can be changed to optimize its characteristics
according to the required application of the display product.
Each of the eight reference voltage outputs can be set with a
10-bit resolution. These outputs can be driven to within
50mV of the power rails of the EL5126. As all of the output
buffers are identical, it is also possible to use the EL5126 for
applications other than LCDs where multiple voltage
references are required that can be set to 10 bit accuracy.
Digital Interface
The EL5126 uses a simple two-wire I2C digital interface to
program the outputs. The bus line SCLK is the clock signal
line and bus SDA is the data information signal line. The
EL5126 can support the clock rate up to 400kHz. External
pull up resistor is required for each bus line. The typical
value for these two pull up resistor is about 1kΩ.
START AND STOP CONDITION
The Start condition is a high to low transition on the SDA line
while SCLK is high. The Stop condition is a low to high
transition on the SDA line while SCLK is high. The start and
stop conditions are always generated by the master. The
bus is considered to be busy after the start condition and to
be free again a certain time after the stop condition. The two
bus lines must be high when the buses are not in use. The
I2C Timing Diagram 2 shows the format.
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EL5126 arduino
Application Drawing
EL5126
MICROCONTROLLER
HIGH REFERENCE
VOLTAGE
+10V
0.1µF
+12V
0.1µF
+5V
0.1µF
LCD
TIMING
CONTROLLER
I2C DATA IN
HORIZONTAL RATE
I2C CLOCK
+5V
0.1µF
+5.5V
REFH OUTA
VS OUTB
VSD
OUTC
FILTER
OUTD
AO
SDA
OUTE
SCL
OSC
OSC_SEL OUTF
CAP
OUT
REFL
STD
GND
OUTH
EL5126
MIDDLE REFERENCE VOLTAGE
+5V
+12V
0.1µF
+5V
0.1µF
I2C DATA IN
I2C CLOCK
0.1µF
LOW REFERENCE
+1V VOLTAGE
0.1µF
REFH OUTA
OSC
OSC_SEL
VS OUTB
VSD
OUTC
FILTER
AO
SDA
OUTD
SCL
CAP
OUTE
REFL
OUTF
OUT
STD
GND
OUTH
EL5126
COLUMN
(SOURCE)
DRIVER
LCD PANEL
ADDRESS = H74
ADDRESS = H75
All Intersil U.S. products are manufactured, assembled and tested utilizing ISO9000 quality systems.
Intersil Corporation’s quality certifications can be viewed at www.intersil.com/design/quality
Intersil products are sold by description only. Intersil Corporation reserves the right to make changes in circuit design, software and/or specifications at any time without
notice. Accordingly, the reader is cautioned to verify that data sheets are current before placing orders. Information furnished by Intersil is believed to be accurate and
reliable. However, no responsibility is assumed by Intersil or its subsidiaries for its use; nor for any infringements of patents or other rights of third parties which may result
from its use. No license is granted by implication or otherwise under any patent or patent rights of Intersil or its subsidiaries.
For information regarding Intersil Corporation and its products, see www.intersil.com
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