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參數(shù)資料
| 型號(hào)： | EL5625ILZ |
| 廠商： | INTERSIL CORP |
| 元件分類： | 緩沖放大器 |
| 英文描述： | Programmable 18-Channel Gamma with 1-Channel VCOM with Reference |
| 中文描述： | BUFFER AMPLIFIER, QCC38 |
| 封裝： | ROHS COMPLIANT, MO-220, QFN-38 |
| 文件頁(yè)數(shù)： | 8/11頁(yè) |
| 文件大小： | 478K |
| 代理商： | EL5625ILZ |
8
FN7488.0
February 28, 2006
Serial Timing Diagram
V
COM
Amplifier
The V
COM
amplifier is designed to control the voltage on the
back plate of an LCD display. This plate is capacitively
coupled to the pixel drive voltage which alternately cycles
positive and negative at the line rates for the display. Thus
the amplifier must be capable of sourcing and sinking
capacitive pulse of current, which can be quite large (100mA
for typical applications).
Analog Section
TRANSFER FUNCTION
The transfer function is:
where data is the decimal value of the 11-bit data binary
input code.
The output voltages from the EL5625 will be derived from
the reference voltages present at the V
REFL
and V
REFH
pins. The impedance between those two pins is about 32k
.
Care should be taken that the system design holds these two
reference voltages within the limits of the power rails of the
EL5625. GND < V
REFH
≤
V
S
and GND
≤
V
REFL
≤
V
REFH
.
CLOCK OSCILLATOR
The EL5625 requires an internal clock or external clock to
refresh its outputs. The outputs are refreshed at the falling OSC
clock edges. The output refreshed switches open at the rising
edges of the OSC clock. The driving load shouldn’t be changed
at the rising edges of the OSC clock. Otherwise, it will generate
a voltage error at the outputs. This clock may be input or output
via the clock pin labelled EXT_OSC. The internal clock is
provided by an internal oscillator running at approximately
21kHz and can be output to the EXT_OSC pin. In a 2 chip
system, if the driving loads are stable, one chip may be
programmed to use the internal oscillator; then the OSC pin will
output the clock from the internal oscillator. The second chip
may have the OSC pin connected to this clock source.
For transient load application, the external clock mode
should be used to ensure all functions are synchronized
together. The positive edge of the external clock to the OSC
pin should be timed to avoid the transient load effect. The
Application Drawing shows the LCD H rate signal used, here
the positive clock edge is timed to avoid the transient load of
the column driver circuits.
After power on, the chip will start with the internal oscillator
mode. At this time, the EXT_OSC pin will be in a high
impedance condition to prevent contention. By setting pin 10
to high, the chip is on external clock mode. Setting pin 10 to
low, the chip is on internal clock mode.
TABLE 2. SERIAL TIMING PARAMETERS
PARAMETER
RECOMMENDED OPERATING RANGE
DESCRIPTION
T
≥
200ns
Clock Period
t
r
/t
f
0.05 * T
Clock Rise/Fall Time
t
HE
≥
10ns
ENA Hold Time
t
SE
≥
10ns
ENA Setup Time
t
HD
≥
10ns
Data Hold Time
t
SD
≥
10ns
Data Setup Time
t
W
0.50 * T
Clock Pulse Width
B15
B14
B13
B12-B2
B1
B0
ENA
SCLK
SDI
MSB
LSB
t
t
HE
t
SE
t
SD
t
HD
T
t
r
t
w
t
HE
t
SE
LOAD MSB FIRST, LSB LAST
t
f
V
OUT IDEAL
)
V
REFL
=
------------
V
REFH
- V
REFL
(
)
×
+
EL5625
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相關(guān)代理商/技術(shù)參數(shù) |
參數(shù)描述 |
|---|---|
| EL5625ILZ-T13 | 功能描述:LCD Gamma緩沖器 EL5625ILZ PROGUFR + VCOM RoHS:否 制造商:Maxim Integrated 輸入補(bǔ)償電壓: 轉(zhuǎn)換速度: 電源電壓-最大:20 V 電源電壓-最小:9 V 電源電流: 最大功率耗散: 最大工作溫度:+ 85 C 安裝風(fēng)格:SMD/SMT 封裝 / 箱體:TQFN-38 封裝:Tube |
| EL5724 | 制造商:INTERSIL 制造商全稱:Intersil Corporation 功能描述:Integrated Buffers with VCOM |
| EL5724IRE | 功能描述:IC INTEGRATED BUFFER 24-HTSSOP RoHS:否 類別:集成電路 (IC) >> 線性 - 放大器 - 視頻放大器和頻緩沖器 系列:- 標(biāo)準(zhǔn)包裝:1,000 系列:- 應(yīng)用:驅(qū)動(dòng)器 輸出類型:差分 電路數(shù):3 -3db帶寬:350MHz 轉(zhuǎn)換速率:1000 V/µs 電流 - 電源:14.5mA 電流 - 輸出 / 通道:60mA 電壓 - 電源，單路/雙路(±):5 V ~ 12 V，±2.5 V ~ 6 V 安裝類型:表面貼裝 封裝/外殼:20-VFQFN 裸露焊盤 供應(yīng)商設(shè)備封裝:20-QFN 裸露焊盤（4x4） 包裝:帶卷 (TR) |
| EL5724IRE-T13 | 功能描述:IC BUFFER 8XGAMMA 8.3MA 24HTSSOP RoHS:否 類別:集成電路 (IC) >> 線性 - 放大器 - 視頻放大器和頻緩沖器 系列:- 產(chǎn)品培訓(xùn)模塊:Lead (SnPb) Finish for COTS Obsolescence Mitigation Program 標(biāo)準(zhǔn)包裝:50 系列:- 應(yīng)用:TFT-LCD 面板：VCOM 驅(qū)動(dòng)器 輸出類型:滿擺幅 電路數(shù):1 -3db帶寬:35MHz 轉(zhuǎn)換速率:40 V/µs 電流 - 電源:3.7mA 電流 - 輸出 / 通道:1.3A 電壓 - 電源，單路/雙路(±):9 V ~ 20 V，±4.5 V ~ 10 V 安裝類型:表面貼裝 封裝/外殼:8-TSSOP，8-MSOP（0.118"，3.00mm 寬）裸露焊盤 供應(yīng)商設(shè)備封裝:8-uMax-EP 包裝:管件 |
| EL5724IRE-T7 | 功能描述:IC BUFFER 8XGAMMA 8.3MA 24HTSSOP RoHS:否 類別:集成電路 (IC) >> 線性 - 放大器 - 視頻放大器和頻緩沖器 系列:- 產(chǎn)品培訓(xùn)模塊:Lead (SnPb) Finish for COTS Obsolescence Mitigation Program 標(biāo)準(zhǔn)包裝:50 系列:- 應(yīng)用:TFT-LCD 面板：VCOM 驅(qū)動(dòng)器 輸出類型:滿擺幅 電路數(shù):1 -3db帶寬:35MHz 轉(zhuǎn)換速率:40 V/µs 電流 - 電源:3.7mA 電流 - 輸出 / 通道:1.3A 電壓 - 電源，單路/雙路(±):9 V ~ 20 V，±4.5 V ~ 10 V 安裝類型:表面貼裝 封裝/外殼:8-TSSOP，8-MSOP（0.118"，3.00mm 寬）裸露焊盤 供應(yīng)商設(shè)備封裝:8-uMax-EP 包裝:管件 |
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