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PDF EL5226 Data sheet ( Hoja de datos )
| Número de pieza | EL5226 | |
| Descripción | 10- and 12-Channel TFT-LCD Reference Voltage Generators | |
| Fabricantes | Intersil Corporation | |
| Logotipo |  |
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Hay una vista previa y un enlace de descarga de EL5226 (archivo pdf) en la parte inferior de esta página. Total 12 Páginas | ||
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®
Data Sheet
EL5226, EL5326
May 9, 2005
www.DataSheet4U.com
FN7118.3
10- and 12-Channel TFT-LCD Reference
Voltage Generators
The EL5226 and EL5326 are 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 I2C serial interface.
A number of the EL5226 and EL5326 can be stacked for
applications requiring more than 12 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 EL5226 has 10 outputs and the EL5326 has 12 outputs
and both are available in a 28-pin TSSOP package. They
are specified for operation over the full -40°C to +85°C
temperature range.
Features
• 10- to 12-channel reference outputs
• Accuracy of ±1%
• Supply voltage of 5V to 16.5V
• Digital supply 3.3V to 5V
• Low supply current of 10mA
• Rail-to-rail capability
• Pb-Free available (RoHS compliant)
Applications
• TFT-LCD drive circuits
• Reference voltage generators
Ordering Information
PART
NUMBER
PACKAGE TAPE & REEL PKG. DWG. #
EL5226IR
28-Pin TSSOP
-
MDP0044
EL5226IR-T7 28-Pin TSSOP
7”
MDP0044
EL5226IR-T13 28-Pin TSSOP
13”
MDP0044
EL5226IRZ
(See Note)
28-Pin TSSOP
(Pb-free)
-
MDP0044
EL5226IRZ-T7 28-Pin TSSOP
(See Note)
(Pb-free)
7”
MDP0044
EL5226IRZ-T13 28-Pin TSSOP
(See Note)
(Pb-free)
13”
MDP0044
EL5326IR
28-Pin TSSOP
-
MDP0044
EL5326IR-T7 28-Pin TSSOP
7”
MDP0044
EL5326IR-T13 28-Pin TSSOP
13”
MDP0044
EL5326IRZ
(See Note)
28-Pin TSSOP
(Pb-free)
-
MDP0044
EL5326IRZ-T7 28-Pin TSSOP
(See Note)
(Pb-free)
7”
MDP0044
EL5326IRZ-T13 28-Pin TSSOP
(See Note)
(Pb-free)
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-020.
1
CAUTION: These devices are sensitive to electrostatic discharge; follow proper IC Handling Procedures.
1-888-INTERSIL or 1-888-352-6832 | Intersil (and design) is a registered trademark of Intersil Americas Inc.
Copyright Intersil Americas Inc. 2003, 2004, 2005. All Rights Reserved
All other trademarks mentioned are the property of their respective owners.
1 page  
EL5226, EL5326
Typical Performance Curves
www.DataSheet4U.com
VS=15V, VSD=5V, VREFH=13V, VREFL=2V
0.3
0.2
0.1
0
-0.1
-0.2
-0.3
10
210 410 610 810 1010
INPUT CODE
FIGURE 1. DIFFERENTIAL NONLINEARITY vs CODE
VS=VREFH=15V
VREFL=0V
1.2
1.0
0.8
0.6
0.4
0.2
0
3 3.2 3.4 3.5 3.8 4 4.2 4.4 4.5 4.8 5
VSD (V)
FIGURE 2. DIGITAL SUPPLY VOLTAGE vs DIGITAL SUPPLY
CURRENT
VS=VREFH=15V
M=400ns/DIV
0mA
5mA
5V
CL=1nF
RS=20Ω
CL=180pF
5mA/DIV
CL=4.7nF
RS=20Ω
200mV/DIV
FIGURE 3. TRANSIENT LOAD REGULATION (SOURCING)
VS=VREFH=15V
M=400ns/DIV
5mA
0mA
CL=1nF
RS=20Ω
CL=180pF
CL=4.7nF
RS=20Ω
FIGURE 4. TRANSIENT LOAD REGULATION (SINKING)
M=400µs/DIV
5V
0V
5V
0V
10V
5V
OUTPUT
0V
SCLK
SDA
FIGURE 5. LARGE SIGNAL RESPONSE (RISING FROM 0V
TO 8V)
M=400µs/DIV
SCLK
SDA
OUTPUT
FIGURE 6. LARGE SIGNAL RESPONSE (FALLING FROM 8V
TO 0V)
5
5 Page 
EL5226, EL5326
The maximum power dissipation actually produced by the IC
is the total quiescent supply current times the total power
supply voltage and plus the power in the IC due to the loads.
PDMAX = VS × IS + Σ[(VS - VOUTi ) × ILOADi]
when sourcing, and:
PDMAX = VS × IS + Σ(VOUTi × ILOADi)
when sinking.
Where:
• i = 1 to total 12
• VS = Supply voltage
• IS = Quiescent current
• VOUTi = Output voltage of the i channel
• ILOADi = Load current of the i channel
By setting the two PDMAX equations equal to each other, we
can solve for the RLOAD's to avoid the device overheat. The
package power dissipation curves provide a convenient way
to see if the device will overheat.
POWER SUPPLY BYPASSING AND PRINTED CIRCUIT
BOARD LAYOUT
Good printed circuit board layout is necessary for optimum
performance. A low impedance and clean analog ground
plane should be used for the EL5226 and EL5326. The
traces from the two ground pins to the ground plane must be
very short. The thermal pad of the EL5226 and EL5326
should be connected to the analog ground plane. Lead
length should be as short as possible and all power supply
pins must be well bypassed. A 0.1µF ceramic capacitor must
be place very close to the VS, VREFH, VREFL, and CAP
pins. A 4.7µF local bypass tantalum capacitor should be
placed to the VS, VREFH, and VREFL pins.
APPLICATION USING THE EL5226 AND EL5326
In the first application drawing, the schematic shows the
interconnect of a pair of EL5226 and EL5326 chips
connected to give 8 gamma corrected voltages above the
VCOM voltage, and 8 gamma corrected voltages below the
VCOM voltage.
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| Páginas | Total 12 Páginas | |
| PDF Descargar | [ Datasheet EL5226.PDF ] | |
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