- 您現在的位置：買賣IC網 > PDF目錄374016 > ADM8840 (Analog Devices, Inc.) Charge Pump Regulator & COM Driver for Color TFT Panel PDF資料下載
參數資料
| 型號： | ADM8840 |
| 廠商： | Analog Devices, Inc. |
| 英文描述： | Charge Pump Regulator & COM Driver for Color TFT Panel |
| 中文描述： | 電荷泵穩(wěn)壓器 |
| 文件頁數： | 5/10頁 |
| 文件大?。?/td> | 166K |
| 代理商： | ADM8840 |
ADM8840
–5–
REV. PrG
2/03
PRELIMINARY TECHNICAL DATA
PIN FUNCTION DESCRIPTION
Pin
Mnemonic
Function
1,32
C1+,C1-
External capacitor C1 is connected between these pins. A 3.3 F capacitor is
recommended.
2, 22
V
CC
Positive Supply Voltage Input. Connect this pin to 3V supply. A 4.7 F
decoupling capacitor should be attached close to pin 2.
Voltage Doubler Output. This was derived by doubling the 3V supply. A 3.3 F
capacitor to ground is required on this pin.
3
VOUT
4
+5VOUT
+5.0V output pin. This was derived by doubling and regulating the +3V supply.
A 2.2 F capcitor to ground is required on this pin to stabilise the regulator.
5
+5VIN
+5.0V input pin. This is the input to the voltage tripler and inverter charge pump
circuits.
6
SHDN
Digital Input. 3V CMOS Logic. Active low shutdown control. This shuts down
the timing generator and enables the discharge circuit to dissipate the charge on
the voltage outputs, thus driving them to 0V.
7
DAC1_SD
Switches over to external DAC1 input when asserted.
9
DAC1_IN
Input for external DAC1 signal.
17, 31
GND
Device Ground Pin.
13
SCLK
External Clock Input. Used to load DAC 1 with COM Voltage amplitude and
DAC 2 with COM Centre Voltage.
12
DATA
Digital Data Input to both DAC’s 1 and 2.
11
CS /
LDAC
Dual function pin.
1.Chip Select. Digital Input Logic. Chip Select for Digital Interface.
2. Load DAC. Digital Input Logic. DAC’s 1 and 2 perform a conversion on a
low-to-high transition.
18
COM_IN
Clock Input from digital controller chip. This input is level shifted, offset and
inverted to provide a COM Voltage output swing at a frequency of the COM_IN
input.
16
COM_OUT_AC
COM_OUT_AC outputs the COM_IN signal inverted and level shifted by the
value programmed on DAC 1. A 4.7 F capacitor is connected between this pin
and COM_OUT.
14
COM_OUT
The AC output on COM_OUT_AC is added to the center voltage programmed on
DAC2 so that the desired amplitude, centered about the correct center voltage
appears on COM_OUT. The load capacitance seen by this pin is the bulk capaci
tance of the panel, typically 20nF.
8
DAC2_SD
Switches over to external DAC2 input when asserted.
10
DAC2_IN
Input for external DAC2 signal.
15
TRANS_OUT
Level Translator Reference Output Voltage. This is the voltage that the value on
DAC 1 is gained up to to provide the upper voltage for the Level Translator. A
voltage of between 4.0V and 7.0V can be output here. A 4.7 F cap is
recommended for this pin.
CAUTION
ESD (electrostatic discharge) sensitive device. Electrostatic charges as high as 4000 V readily
accumulate on the human body and test equipment and can discharge without detection.
Although the ADM8840 features proprietary ESD protection circuitry, permanent damage
may occur on devices subjected to high energy electrostatic discharges. Therefore, proper
ESD precautions are recommended to avoid performance degradation or loss of functionality.
相關PDF資料 |
PDF描述 |
|---|---|
| ADM8840ACP | 20-17 (6 Contacts) Socket Insert; For Use With:Amphenol MIL-C-5015 97 Series Circular Connectors; No. of Contacts:6 |
| ADM8845 | Charge Pump Driver for LCD White LED Backlights |
| ADM8845ACP | Charge Pump Driver for LCD White LED Backlights |
| ADM8845ACP-REEL7 | Charge Pump Driver for LCD White LED Backlights |
| ADM8845ACPZ | Charge Pump Driver for LCD White LED Backlights |
相關代理商/技術參數 |
參數描述 |
|---|---|
| ADM8840ACP | 制造商:Analog Devices 功能描述:LCD DRVR 2.7V TO 3.6V 32LFCSP - Bulk |
| ADM8840ACP-REEL7 | 制造商:Analog Devices 功能描述: |
| ADM8843 | 制造商:AD 制造商全稱:Analog Devices 功能描述:4 White LED Backlight Driver |
| ADM8843ACPZ | 制造商:Analog Devices 功能描述:LED DRVR 4SEGMENT 3.3V/5V 16LFCSP EP - Bulk |
| ADM8843ACPZ1-R7 | 制造商:Analog Devices 功能描述: |
發(fā)布緊急采購，3分鐘左右您將得到回復。