- 您現(xiàn)在的位置：買(mǎi)賣IC網(wǎng) > PDF目錄362623 > EL5027IWTZ-T7 (INTERSIL CORP) Dual 2.5MHz Rail-to-Rail Input-Output Buffer PDF資料下載
參數(shù)資料
| 型號(hào)： | EL5027IWTZ-T7 |
| 廠商： | INTERSIL CORP |
| 元件分類： | 緩沖放大器 |
| 英文描述： | Dual 2.5MHz Rail-to-Rail Input-Output Buffer |
| 中文描述： | DUAL BUFFER AMPLIFIER, PDSO6 |
| 封裝： | ROHS COMPLIANT, TSOT-6 |
| 文件頁(yè)數(shù)： | 9/10頁(yè) |
| 文件大?。?/td> | 276K |
| 代理商： | EL5027IWTZ-T7 |
9
FN7426.0
June 24, 2004
output will not change phase, the input's overvoltage should
be avoided. If an input voltage exceeds supply voltage by
more than 0.6V, electrostatic protection diodes placed in the
input stage of the device begin to conduct and overvoltage
damage could occur.
FIGURE 19. OPERATION WITH BEYOND-THE-RAILS INPUT
Power Dissipation
With the high-output drive capability of the EL5027 buffer, it
is possible to exceed the 125°C 'absolute-maximum junction
temperature' under certain load current conditions.
Therefore, it is important to calculate the maximum junction
temperature for the application to determine if load
conditions need to be modified for the buffer to remain in the
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
P
DMAX
= Maximum power dissipation in 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 loads, or:
when sourcing, and:
when sinking.
where:
i = 1 to 2 for dual buffer
V
S
= Total supply voltage
I
SMAX
= Maximum supply current per channel
V
OUT
i = Maximum output voltage of the application
I
LOAD
i = Load current
If we set the two P
DMAX
equations equal to each other, we
can solve for R
LOAD
i to avoid device overheat. Figure 20
and Figure 21 provide a convenient way to see if the device
will overheat. The maximum safe power dissipation can be
found graphically, based on the package type and the
ambient temperature. By using the previous equation, it is a
simple matter to see if P
DMAX
exceeds the device's power
derating curves.
Unused Buffers
It is recommended that any unused buffer have the input tied
to the ground plane.
Driving Capacitive Loads
The EL5027 can drive a wide range of capacitive loads. As
load capacitance increases, however, the -3dB bandwidth of
the device will decrease and the peaking increase. The
buffers drive 10pF loads in parallel with 10k
with just 1.5dB
of peaking, and 100pF with 6.4dB of peaking. If less peaking
is desired in these applications, a small series resistor
(usually between 5
and 50
) can be placed in series with
the output. However, this will obviously reduce the gain
slightly. Another method of reducing peaking is to add a
"snubber" circuit at the output. A snubber is a shunt load
consisting of a resistor in series with a capacitor. Values of
150
and 10nF are typical. The advantage of a snubber is
that it does not draw any DC load current or reduce the gain.
Power Supply Bypassing and Printed Circuit
Board Layout
The EL5027 can provide gain at high frequency. As with any
high frequency device, good printed circuit board layout is
necessary for optimum performance. Ground plane
construction is highly recommended, lead lengths should be
as short as possible, and the power supply pins must be well
bypassed to reduce the risk of oscillation. For normal single
supply operation, where the V
S
- pin is connected to ground,
a 0.1μF ceramic capacitor should be placed from V
S
+ to pin
to V
S
- pin. A 4.7μF tantalum capacitor should then be
connected in parallel, placed in the region of the buffer. One
4.7μF capacitor may be used for multiple devices. This same
capacitor combination should be placed at each supply pin
to ground if split supplies are to be used.
1V
1V
10μs
V
S
=±2.5V
T
A
=25°C
V
IN
=6V
P-P
P
DMAX
T
- T
JA
--------------------------------------------
=
P
DMAX
Σ
i V
S
I
SMAX
V
S
+
(
- V
OUT
i
)
I
LOAD
i
]
×
+
×
=
P
DMAX
Σ
i V
S
I
SMAX
V
(
OUT
i - V
S
-
)
I
LOAD
i
×
+
×
]
=
EL5027
相關(guān)PDF資料 |
PDF描述 |
|---|---|
| EL5027IWTZ-T7A | Dual 2.5MHz Rail-to-Rail Input-Output Buffer |
| EL5100ISZ | 200MHz Slew Enhanced VFA |
| EL5100ISZ-T13 | 200MHz Slew Enhanced VFA |
| EL5100ISZ-T7 | 200MHz Slew Enhanced VFA |
| EL5102IWZ-T7 | 400MHz Slew Enhanced VFAs |
相關(guān)代理商/技術(shù)參數(shù) |
參數(shù)描述 |
|---|---|
| EL5027IWTZ-T7A | 功能描述:IC BUFFER DUAL R-R I/O 6-TSOT RoHS:是 類別:集成電路 (IC) >> Linear - Amplifiers - Instrumentation 系列:- 標(biāo)準(zhǔn)包裝:50 系列:- 放大器類型:通用 電路數(shù):2 輸出類型:滿擺幅 轉(zhuǎn)換速率:1.8 V/µs 增益帶寬積:6.5MHz -3db帶寬:4.5MHz 電流 - 輸入偏壓:5nA 電壓 - 輸入偏移:100µV 電流 - 電源:65µA 電流 - 輸出 / 通道:35mA 電壓 - 電源，單路/雙路(±):1.8 V ~ 5.25 V，±0.9 V ~ 2.625 V 工作溫度:-40°C ~ 85°C 安裝類型:表面貼裝 封裝/外殼:10-TFSOP，10-MSOP（0.118"，3.00mm 寬） 供應(yīng)商設(shè)備封裝:10-MSOP 包裝:管件 |
| EL503 | 制造商:PHILIPS 制造商全稱:NXP Semiconductors 功能描述:A.F. OUTPUT PENTODE |
| EL-506VB | 制造商:Sharp Microelectronics Corporation 功能描述:SHARP SCIENTIFIC CALCULATOR NEW VERSION 449 FUNCTION BLACK |
| EL-506XBWH | 制造商:Sharp 功能描述:Sharp D.A.L Scientific Calculator EL-506L |
| EL5100 | 制造商:INTERSIL 制造商全稱:Intersil Corporation 功能描述:200MHz Slew Enhanced VFA |
發(fā)布緊急采購(gòu)，3分鐘左右您將得到回復(fù)。