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參數(shù)資料
| 型號(hào)： | ISL45042A |
| 廠商： | Intersil Corporation |
| 英文描述： | LCD Module Calibrator |
| 中文描述： | 液晶顯示模塊校準(zhǔn) |
| 文件頁(yè)數(shù)： | 5/8頁(yè) |
| 文件大?。?/td> | 136K |
| 代理商： | ISL45042A |
5
FN6158.2
October 13, 2006
When the part is programmed, the counter setting is loaded
into the non-volatile memory. This value will be loaded from
the nonvolatile memory during initial power-up or when the
CE pin is pulled low.
Once the programming is completed it is recommended that
the user float the CLT pin. The CTL pin is internally tied to a
resistor network connected to ground. If left floating, the
voltage at the CTL pin will equal V
DD
/2. Under these
conditions, no additional pulses will be seen by the Up/Down
counter via the CTL pin. To prevent further programming
ground the CE pin.
CTL should have a noise filter to reduce bouncing or noise
on the input that could cause unwanted counting when the
CE pin is high. The board should have an additional ESD
protection circuit, with a series 1k
resistor and a shunt
0.01μF capacitor connected on the CTL pin. (See Figure 3)
To avoid unintentional adjustment, the ISL45042A
guarantees to reject CTL pulses shorter than 20μs.
During Initial Power-up (only), to avoid the possibility of a
false pulse (since the internal comparators come up in an
unknown state) the very first CTL pulse is ignored. See
Figure 6 for the timing information..
CE Pin
To adjust the output voltage, the CE pin must be pulled high
(VDD). The CE pin has an internal pull-down resistor to
prevent unwanted reprogramming of the EEPROM. The
impedance of this resistor is 400k
to 500k
(R
INTERNAL
Figure 5).
The CE pin has a Schmitt trigger on the input to prevent
false triggering during slow transitions of the CE pin.
Transitions of the CE pin are recommended to be less than
10
μ
s.
Replacing Existing Mechanical Potentiometer
Circuits
Figure 4 shows the common adjustment mechanical circuits
and equivalent replacement with the ISL45042A.
Expected Output Voltage
The ISL45042A provides an output sink current which lowers
the voltage on the external voltage divider (VCOM output
voltage). EQ. 1 and EQ. 2 can be used to calculate the
output current (IOUT) and output voltage (VOUT) values.
)
NOTE: Where setting is an integer between 1 and 128.
CTL VOLTAGE
TIME
4.9V
CTL
PT
FIGURE 2. EEPROM PROGRAMMING
>200μs
FIGURE 3. EXTERNAL ESD PROTECTION ON CTL PIN
ISL45042A
CTL
0.01μF
1k
IOUT
--------------------
X
----------------------------
=
(EQ. 1)
VOUT
R2
----------+
AVDD 1
--------------------
X
)
----------------------------
–
=
(EQ. 2)
-
+
R
a
R
b
R
c
R
SET
-
+
ISL45042A
SET
OUT
AVDD
R
1
R
2
AVDD
VCOM
VCOM
AVDD
R
1
= Ra
R
2
= Rb + Rc
R
SET
= (Ra(Rb + Rc)) / 20Rb
FIGURE 4. EXAMPLE OF THE REPLACEMENT FOR THE MECHANICAL POTENTIOMETER CIRCUIT USING THE ISL45042A
ISL45042A
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PDF描述 |
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| ISL45042AIRZ | LCD Module Calibrator |
| ISL45042AIRZ-T | LCD Module Calibrator |
| ISL45042AIRZ-TK | LCD Module Calibrator |
| ISL45042IRZ-TK | LCD Module Calibrator |
| ISL45042 | LCD Module Calibrator |
相關(guān)代理商/技術(shù)參數(shù) |
參數(shù)描述 |
|---|---|
| ISL45042A_07 | 制造商:INTERSIL 制造商全稱(chēng):Intersil Corporation 功能描述:LCD Module Calibrator |
| ISL45042AIRZ | 功能描述:IC LCD CALIBRATOR 8-TDFN RoHS:是 類(lèi)別:集成電路 (IC) >> 線性 - 視頻處理 系列:- 產(chǎn)品變化通告:Product Discontinuation 07/Mar/2011 標(biāo)準(zhǔn)包裝:3,000 系列:OMNITUNE™ 類(lèi)型:調(diào)諧器 應(yīng)用:移動(dòng)電話，手機(jī)，視頻顯示器 安裝類(lèi)型:表面貼裝 封裝/外殼:65-WFBGA 供應(yīng)商設(shè)備封裝:PG-WFSGA-65 包裝:帶卷 (TR) 其它名稱(chēng):SP000365064 |
| ISL45042AIRZ-T | 功能描述:IC LCD CALIBRATOR 8-TDFN RoHS:是 類(lèi)別:集成電路 (IC) >> 線性 - 視頻處理 系列:- 產(chǎn)品變化通告:Product Discontinuation 07/Mar/2011 標(biāo)準(zhǔn)包裝:3,000 系列:OMNITUNE™ 類(lèi)型:調(diào)諧器 應(yīng)用:移動(dòng)電話，手機(jī)，視頻顯示器 安裝類(lèi)型:表面貼裝 封裝/外殼:65-WFBGA 供應(yīng)商設(shè)備封裝:PG-WFSGA-65 包裝:帶卷 (TR) 其它名稱(chēng):SP000365064 |
| ISL45042AIRZ-TK | 功能描述:IC LCD CALIBRATOR 8-TDFN RoHS:是 類(lèi)別:集成電路 (IC) >> 線性 - 視頻處理 系列:- 產(chǎn)品變化通告:Product Discontinuation 07/Mar/2011 標(biāo)準(zhǔn)包裝:3,000 系列:OMNITUNE™ 類(lèi)型:調(diào)諧器 應(yīng)用:移動(dòng)電話，手機(jī)，視頻顯示器 安裝類(lèi)型:表面貼裝 封裝/外殼:65-WFBGA 供應(yīng)商設(shè)備封裝:PG-WFSGA-65 包裝:帶卷 (TR) 其它名稱(chēng):SP000365064 |
| ISL45042EVAL1 | 制造商:Intersil Corporation 功能描述:ISL45042 EVALUATION BOARD 1 - Bulk 制造商:Intersil 功能描述:ISL54225IRTZ EVALBRD 1 10LD TQFN RHS COMP |
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