Datenblatt-Suchmaschine für elektronische Bauteile
  German  ▼
ALLDATASHEETDE.COM

X  

ADD8709 Datenblatt(PDF) 10 Page - Analog Devices

Teilenummer ADD8709
Bauteilbeschribung  18-Channel Gamma Buffer with Regulator
Download  16 Pages
Scroll/Zoom Zoom In 100%  Zoom Out
Hersteller  AD [Analog Devices]
Direct Link  http://www.analog.com
Logo AD - Analog Devices

ADD8709 Datenblatt(HTML) 10 Page - Analog Devices

Back Button ADD8709_15 Datasheet HTML 6Page - Analog Devices ADD8709_15 Datasheet HTML 7Page - Analog Devices ADD8709_15 Datasheet HTML 8Page - Analog Devices ADD8709_15 Datasheet HTML 9Page - Analog Devices ADD8709_15 Datasheet HTML 10Page - Analog Devices ADD8709_15 Datasheet HTML 11Page - Analog Devices ADD8709_15 Datasheet HTML 12Page - Analog Devices ADD8709_15 Datasheet HTML 13Page - Analog Devices ADD8709_15 Datasheet HTML 14Page - Analog Devices Next Button
Zoom Inzoom in Zoom Outzoom out
 10 / 16 page
background image
ADD8709
Rev. A | Page 10 of 16
APPLICATION NOTES
The ADD8709 is a gamma reference generator that allows
source drivers to be optimized for the different combinations
of liquid crystals, glass sizes, etc. in large LCD panels.
In a typical panel application, the selected source drivers have
an internal gamma curve that is not ideal for the specific panel,
as shown in Figure 19. The ADD8709 allows the gamma curve
in the source drivers to be adjusted appropriately, and also
ensures that all of the source drivers have the same gamma
curve.
16
14
12
10
PANEL GAMMA CURVE
CORRECTED BY ADD8709
ORIGINAL GAMMA CURVE
IN SOURCE DRIVERS
8
6
4
2
0
GAMMA REFERENCE INPUT POINTS
Figure 19. Original and Corrected Gamma Curves
The ADD8709 also includes a low dropout linear regulator to
provide a stable reference level for the gamma curve for best
panel performance.
VOLTAGE REGULATOR
The on-board voltage regulator provides a regulated voltage to
the external resistors to set different gamma voltages.
The output of the regulator is set by the two resistors, R1 and R2,
and an internal reference voltage of 1.2V. In the ADD8709, R1
and R2 are external components. The output voltage can is
found by
VREG OUT = VREF × (R2/R1 + 1)
VREF
1.2V
+
R2
55k
R1
5k
VREG OUT
Figure 20. Voltage Regulator
MAXIMUM POWER DISSIPATION
The maximum safe power dissipation in the ADD8709 package
is limited by the associated rise in junction temperature (TJ) on
the die. At approximately 150°C, the glass transition temper-
ature, the properties of the plastic change. Even temporarily
exceeding this temperature limit may change the stresses that
the package exerts on the die, permanently shifting the para-
metric performance of the ADD8709. Exceeding a junction
temperature of 175°C for an extended period can result in
changes in the silicon devices, potentially causing failure.
OPERATING TEMPERATURE RANGE
The junction temperature is
TJ = TAMB + θJA × PDIS
where:
TAMB = ambient temperature.
θJA = junction-to-ambient thermal resistance, in °C/watt.
PDIS = power dissipated in the device, in watts.
For the ADD8709, PDIS can be calculated by
PDIS = VDD × IDQ + Σ(IOUT X(+) × (VDD − VOUT X)) +
Σ(−IOUT X(-) × VOUTX) + (VDD – VREG OUT) × ILOAD
where:
VDD × IDQ = nominal system power requirements.
IOUT X(+) × (VDD − VOUT X) = positive-current amplifier load power
dissipation (current comes from VDD).
−IOU XT(-) × VOUT X = negative-current amplifier load power
dissipation (current goes to GND).
(VDD – VREG OUT) × ILOAD = regulator load power dissipation.
Example 1
To calculate an estimated power consumption of the ADD8709
assume:
VDD × IDQ = 16 V × 15 mA = 0.240 W.
(VDD – VREG OUT) × ILOAD = (16 V – 14.4 V) × 5 mA = 0.008 W.


Ähnliche Teilenummer - ADD8709_15

HerstellerTeilenummerDatenblattBauteilbeschribung
logo
Analog Devices
ADD8709ASTZ-REEL AD-ADD8709ASTZ-REEL Datasheet
488Kb / 16P
   18-Channel Gamma Buffer with Regulator
REV. 0
ADD8709ASTZ-REEL7 AD-ADD8709ASTZ-REEL7 Datasheet
488Kb / 16P
   18-Channel Gamma Buffer with Regulator
REV. 0
More results

Ähnliche Beschreibung - ADD8709_15

HerstellerTeilenummerDatenblattBauteilbeschribung
logo
Analog Devices
ADD8709 AD-ADD8709 Datasheet
488Kb / 16P
   18-Channel Gamma Buffer with Regulator
REV. 0
ADD8708 AD-ADD8708_15 Datasheet
612Kb / 16P
   18-Channel Gamma Buffer with Regulator
REV. 0
ADD8708 AD-ADD8708 Datasheet
611Kb / 16P
   18-Channel Gamma Buffer with Regulator
REV. 0
ADD8701 AD-ADD8701 Datasheet
289Kb / 8P
   12-Channel Gamma Buffers with VCOM Buffer
REV. 0
logo
Maxim Integrated Produc...
DS3508 MAXIM-DS3508 Datasheet
193Kb / 14P
   I2C, 8-Channel Gamma Buffer with EEPROM
Rev 1; 3/08
logo
Analog Devices
ADD8701 AD-ADD8701_15 Datasheet
295Kb / 8P
   12-Channel Gamma Buffers with VCOM Buffer
REV. 0
ADD8702 AD-ADD8702_15 Datasheet
237Kb / 8P
   12-Channel Gamma Buffers with V Buffer
REV. 0
ADD8710 AD-ADD8710_15 Datasheet
308Kb / 12P
   10-Channel Gamma Buffer with VCOM Driver
REV. B
ADD8702 AD-ADD8702 Datasheet
233Kb / 8P
   12-Channel Gamma Buffers with Vcom Buffer
REV. 0
logo
Intersil Corporation
EL5228 INTERSIL-EL5228 Datasheet
124Kb / 3P
   VCOM with Dual Gamma Buffer
More results


Html Pages

1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16


Datenblatt Download

Go To PDF Page


Link URL




Privatsphäre und Datenschutz
ALLDATASHEETDE.COM
War ALLDATASHEET hilfreich?  [ DONATE ] 

Über Alldatasheet   |   Werbung   |   Kontakt   |   Privatsphäre und Datenschutz   |   Linktausch   |   Hersteller
All Rights Reserved©Alldatasheet.com


Mirror Sites
English : Alldatasheet.com  |   English : Alldatasheet.net  |   Chinese : Alldatasheetcn.com  |   German : Alldatasheetde.com  |   Japanese : Alldatasheet.jp
Russian : Alldatasheetru.com  |   Korean : Alldatasheet.co.kr  |   Spanish : Alldatasheet.es  |   French : Alldatasheet.fr  |   Italian : Alldatasheetit.com
Portuguese : Alldatasheetpt.com  |   Polish : Alldatasheet.pl  |   Vietnamese : Alldatasheet.vn
Indian : Alldatasheet.in  |   Mexican : Alldatasheet.com.mx  |   British : Alldatasheet.co.uk  |   New Zealand : Alldatasheet.co.nz
Family Site : ic2ic.com  |   icmetro.com