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參數(shù)資料
| 型號： | ISL59833IAZ-T7 |
| 廠商： | INTERSIL CORP |
| 元件分類： | 音頻／視頻放大 |
| 英文描述： | 200MHz Single Supply Video Driver With Charge Pump |
| 中文描述： | 1 CHANNEL, VIDEO AMPLIFIER, PDSO16 |
| 封裝： | ROHS COMPLIANT, PLASTIC, QSOP-16 |
| 文件頁數(shù)： | 14/15頁 |
| 文件大小： | 344K |
| 代理商： | ISL59833IAZ-T7 |
14
FN6334.1
March 5, 2007
current never exceeds ±40mA, after which the electro-
migration limit of the process will be exceeded and the part
will be damaged. This limit is set by the design of the internal
metal interconnections.
POWER DISSIPATION
With the high output drive capability of the ISL59837, it is
possible to exceed the
+
150°C absolute maximum junction
temperature under certain load current conditions.
Therefore, it is important to calculate the maximum junction
temperature for an application to determine if load conditions
or package types need to be modified to assure operation of
the amplifier in a safe operating area.
The maximum power dissipation allowed in a package is
determined according to:
Where:
T
JMAX
= Maximum junction temperature
T
AMAX
= Maximum ambient temperature
Θ
JA
= Thermal resistance of the package
The maximum power dissipation actually produced by an IC
is the total quiescent supply current times the total power
supply voltage, plus the power in the IC due to the load, or:
for sourcing:
for sinking:
Where:
V
S
= Supply voltage
I
SMAX
= Maximum quiescent supply current
V
OUT
= Maximum output voltage of the application
R
LOAD
= Load resistance tied to ground
I
LOAD
= Load current
i = Number of output channels
By setting the two P
DMAX
equations equal to each other, we
can solve the output current and R
LOAD
to avoid the device
overheat.
Power Supply Bypassing and Printed Circuit
Board Layout
Strip line design techniques are recommended for the input
and output signal traces. As with any high frequency device,
a good printed circuit board layout is necessary for optimum
performance. Lead lengths should be as short as possible.
The power supply pin must be well bypassed to reduce the
risk of oscillation. For normal single supply operation, where
the V
S
- pin is connected to the ground plane, a single 4.7μF
tantalum capacitor in parallel with a 0.1μF ceramic capacitor
from V
S
+ to GND will suffice. This same capacitor
combination should be placed at each supply pin to ground if
split-internal supplies are to be used. In this case, the V
S
-
pin becomes the negative supply rail.
For good AC performance, parasitic capacitance should be
kept to a minimum. Use of wire-wound resistors should be
avoided because of their additional series inductance. Use
of sockets should also be avoided if possible. Sockets add
parasitic inductance and capacitance can result in
compromised performance. Minimizing parasitic capacitance
at the amplifier's inverting input pin is also very important.
PD
MAX
T
--------------------------------------------
T
JA
–
=
(EQ. 1)
PD
MAX
V
S
I
SMAX
V
S
V
OUT
i
–
(
)
+
×
V
i
L
-----------------
×
=
(EQ. 2)
PD
MAX
V
S
I
SMAX
V
OUT
i
V
S
–
(
)
+
×
I
LOAD
i
×
=
(EQ. 3)
ISL59833
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| ISL59837IAZ-EVALZ | 功能描述:EVAL BOARD FOR ISL59837IAZ RoHS:是 類別:編程器，開發(fā)系統(tǒng) >> 評估演示板和套件 系列:* 標(biāo)準(zhǔn)包裝:1 系列:PCI Express® (PCIe) 主要目的:接口，收發(fā)器，PCI Express 嵌入式:- 已用 IC / 零件:DS80PCI800 主要屬性:- 次要屬性:- 已供物品:板 |
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