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PDF EL5225 Data sheet ( Hoja de datos )
| Número de pieza | EL5225 | |
| Descripción | 10-Channel TFT-LCD Reference Voltage Generator | |
| Fabricantes | Intersil Corporation | |
| Logotipo |  |
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Hay una vista previa y un enlace de descarga de EL5225 (archivo pdf) en la parte inferior de esta página. Total 12 Páginas | ||
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®
Data Sheet
March 11, 2004
EL5225
www.DataSheet4U.com
FN7356.0
10-Channel TFT-LCD Reference Voltage
Generator
The EL5225 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 3-wire, SPI compatible interface.
A number of the EL5225 can be stacked for applications
requiring more than 10 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 EL5225 has 10 outputs, and is available in the 24-pin
TSSOP package. They are specified for operation over the
full -40°C to +85°C temperature range.
Ordering Information
PART
NUMBER
(See Note)
PACKAGE
(Pb-Free)
TAPE &
REEL
PKG. DWG. #
EL5225IRZ
24-Pin TSSOP
-
MDP0044
EL5225IRZ-T7 24-Pin TSSOP
7”
MDP0044
EL5225IRZ-T13 24-Pin TSSOP
13”
MDP0044
NOTE: Intersil Pb-free 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-020C.
Features
• 10-channel reference outputs
• Accuracy of ±1%
• Supply voltage of 5V to 16.5V
• Digital supply 3.3V to 5V
• Low supply current of 9mA
• Rail-to-rail capability
• Pb-free available (RoHS compliant)
Applications
• TFT-LCD drive circuits
• Reference voltage generators
Pinout
EL5225
(24-PIN TSSOP)
TOP VIEW
ENA 1
SDI 2
SCLK 3
SDO 4
EXT_OSC 5
VS+ 6
VSD 7
REFH 8
REFL 9
VS+ 10
GND 11
CAP 12
24 OUTA
23 OUTB
22 OUTC
21 GND
20 OUTD
19 OUTE
18 OUTF
17 OUTG
16 GND
15 OUTH
14 OUTI
13 OUTJ
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. 2002-2004. 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  
Typical Performance Curves (Continued)
EL5225
www.DataSheet4U.com
5V
0V
5V
0V
200mV
0V
OUTPUT
SCLK
SDA
M=400µs/DIV
FIGURE 7. SMALL SIGNAL RESPONSE (RISING FROM 0V
TO 200mV)
JEDEC JESD51-7 HIGH EFFECTIVE THERMAL
1.4 CONDUCTIVITY TEST BOARD
1.2 1.176W
1
0.8
0.6
θJA =T8S5S°CO/PW24
0.4
0.2
0
0
25
50
75 85 100
125
AMBIENT TEMPERATURE (°C)
FIGURE 9. POWER DISSIPATION vs AMBIENT
TEMPERATURE
General Description
The EL5225 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 EL5225,
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 EL5225. As all of the output
buffers are identical, it is also possible to use the EL5225 for
applications other than LCDs where multiple voltage
references are required that can be set to 10 bit accuracy.
5V
0V
5V
0V
200mV
0V
OUTPUT
SCLK
SDA
M=400µs/DIV
FIGURE 8. SMALL SIGNAL RESPONSE (FALLING FROM
200mV TO 0V)
JEDEC JESD51-3 LOW EFFECTIVE THERMAL
0.9 CONDUCTIVITY TEST BOARD
0.8 781mW
0.7
0.6
0.5
θJA =T12S8S°OCP/W24
0.4
0.3
0.2
0.1
0
0
25
50
75 85 100
125
AMBIENT TEMPERATURE (°C)
FIGURE 10. POWER DISSIPATION vs AMBIENT
TEMPERATURE
Digital Interface
The EL5225 uses a simple 3-wire SPI compliant digital
interface to program the outputs. The EL5225 can support
the clock rate up to 5MHz.
Serial Interface
The EL5225 is programmed through a three-wire serial
interface. The start and stop conditions are defined by the
ENA signal. While the ENA is low, the data on the SDI (serial
data input) pin is shifted into the 16-bit shift register on the
positive edge of the SCLK (serial clock) signal. The MSB (bit
15) is loaded first and the LSB (bit 0) is loaded last (see
Table 1). After the full 16-bit data has been loaded, the ENA
is pulled high and the addressed output channel is updated.
The SCLK is disabled internally when the ENA is high. The
SCLK must be low before the ENA is pulled low.
5 FN7356.0
March 11, 2004
5 Page 
Application Drawing
EL5225
MICROCONTROLLER
HIGH REFERENCE
VOLTAGE
+10V
0.1µF
+12V
0.1µF
+5V
0.1µF
LCD
TIMING
CONTROLLER
HORIZONTAL
RATE
0.1µF
REFH OUTA
VS OUTB
VSD
OUTC
SDI
SCK
ENA
SDO
OSC
CAP
OUTD
OUTE
OUTF
REFL
OUTI
+5.5V
GND
OUTJ
EL5225
MIDDLE REFERENCE VOLTAGE
+12V
0.1µF
+5V
0.1µF
0.1µF
LOW REFERENCE
VOLTAGE
+1V
0.1µF
REFH
OSC
OUTA
VS OUTB
VSD
OUTC
SDI
SCK
ENA
CAP
OUTD
OUTE
REFL
OUTF
OUTI
GND
OUTJ
EL5225
www.DataSheet4U.com
COLUMN
(SOURCE)
DRIVER
LCD PANEL
11 FN7356.0
March 11, 2004
11 Page | ||
| Páginas | Total 12 Páginas | |
| PDF Descargar | [ Datasheet EL5225.PDF ] | |
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