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參數(shù)資料
| 型號： | ADD8707WCPZ-REEL7 |
| 廠商： | ANALOG DEVICES INC |
| 元件分類： | 運(yùn)動控制電子 |
| 英文描述： | Circular Connector; No. of Contacts:4; Series:LJT00R; Body Material:Aluminum; Connecting Termination:Crimp; Connector Shell Size:15; Circular Contact Gender:Socket; Circular Shell Style:Wall Mount Receptacle; Insert Arrangement:15-4 |
| 中文描述： | 12 BUFFER AMPLIFIER, QCC48 |
| 封裝： | LEAD FREE, MO-220-VKKD, LFCSP-48 |
| 文件頁數(shù)： | 13/20頁 |
| 文件大?。?/td> | 654K |
| 代理商： | ADD8707WCPZ-REEL7 |
ADD8707
VOLTAGE REGULATOR
The on-board voltage regulator provides a regulated voltage to
the resistor chain to provide stable gamma voltages.
Rev. A | Page 13 of 20
The output of the regulator is set by the two mask program-
mable internal resistors R1 and R2, and a reference voltage. In
the ADD8707, the typical values of these parts are shown in
Figure 26. To request a different regulator voltage, please refer
to the Tap Point and Regulator Voltage Request Form in this
data sheet.
0
V
1.2V
+
–
R
2
55k
R
1
5k
V
REG OUT
Figure 26. Voltage Regulator
The internal resistors have a typical accuracy of 0.1%. External
resistors can be used to adjust the regulator voltage, though it is
not recommended. Contact a sales office for further details.
MAXIMUM POWER DISSIPATION
The maximum safe power dissipation in the ADD8707 package
is limited by the associated rise in junction temperature (TJ) on
the die. At approximately 150°C, the glass transition tempera-
ture, 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 ADD8707. Exceeding a junction
temperature of 175°C for an extended period can result in
changes in the silicon devices, potentially causing failure.
LAND PATTERN
The LFCSP package comes with a thermal pad. Soldering
down this thermal pad dramatically improves the heat
dissipation of the package. It is necessary to attach vias that
connect the soldered thermal pad to another layer on the board.
This provides an avenue to dissipate the heat away from the
part. Without vias, the heat is isolated directly under the part.
Subdivide the solder paste, or stencil layer, for the thermal pad.
This reduces solder balling and splatter. It is not critical how the
subdivisions are arranged, as long as the total coverage of the
solder paste for the thermal pad is greater than 50%. The land
pattern is critical to heat dissipation. A suggested land pattern is
shown in Figure 27.
The thermal pad is attached to the substrate. In the ADD8707,
the substrate is connected to V
DD
. To be electrically safe, the
thermal pad should be soldered to an area on the board that is
electrically isolated or connected to V
DD
. Attaching the thermal
pad to ground adversely affects the performance of the part.
相關(guān)PDF資料 |
PDF描述 |
|---|---|
| ADD8708 | 18-Channel Gamma Buffer with Regulator |
| ADD8708WCPZ-REEL7 | 18-Channel Gamma Buffer with Regulator |
| ADD8708WSTZ-REEL | 18-Channel Gamma Buffer with Regulator |
| ADD8709 | 18-Channel Gamma Buffer with Regulator |
| ADD8709ASTZ-REEL | 18-Channel Gamma Buffer with Regulator |
相關(guān)代理商/技術(shù)參數(shù) |
參數(shù)描述 |
|---|---|
| ADD8707WCPZ-TR | 制造商:Analog Devices 功能描述:MASK PROGRAMMABLE 12 CHAN-BUFFER - Tape and Reel |
| ADD8708 | 制造商:AD 制造商全稱:Analog Devices 功能描述:18-Channel Gamma Buffer with Regulator |
| ADD8708ACPZ | 制造商:Analog Devices 功能描述:18 CHANNEL PROGRAMMABLE GAMMA BUFFER WITH REGULATOR - Bulk |
| ADD8708ASTZ-REEL | 制造商:Analog Devices 功能描述: |
| ADD8708WCPZ-REEL7 | 制造商:AD 制造商全稱:Analog Devices 功能描述:18-Channel Gamma Buffer with Regulator |
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