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參數(shù)資料
| 型號： | EL5177IYZ |
| 廠商： | INTERSIL CORP |
| 元件分類： | 通用總線功能 |
| 英文描述： | 550MHz Differential Twisted-Pair Driver |
| 中文描述： | LINE DRIVER, PDSO10 |
| 封裝： | LEAD FREE, MO-187, MSOP-10 |
| 文件頁數(shù)： | 9/11頁 |
| 文件大?。?/td> | 413K |
| 代理商： | EL5177IYZ |
9
exceeded for optimum performance. If a large value of R
F
must be used, a small capacitor in the few Pico farad range
in parallel with R
F
can help to reduce the ringing and
peaking at the expense of reducing the bandwidth.
The bandwidth of the EL5177 depends on the load and the
feedback network. R
F
and R
G
appear in parallel with the
load for gains other than +1. As this combination gets
smaller, the bandwidth falls off. Consequently, R
F
also has a
minimum value that should not be exceeded for optimum
bandwidth performance. For gain of +1, R
F
= 0 is optimum.
For the gains other than +1, optimum response is obtained
with R
F
between 500
to 1k
.
The EL5177 has a gain bandwidth product of 200MHz for
R
LD
= 1k
. For gains
≥
5, its bandwidth can be predicted by
the following equation:
Driving Capacitive Loads and Cables
The EL5177 can drive 23pF differential capacitor in parallel
with 1k
differential load with less than 5dB of peaking at
gain of +1. If less peaking is desired in applications, a small
series resistor (usually between 5
to 50
) can be placed in
series with each output to eliminate most peaking. However,
this will reduce the gain slightly. If the gain setting is greater
than 1, the gain resistor R
G
can then be chosen to make up
for any gain loss which may be created by the additional
series resistor at the output.
When used as a cable driver, double termination is always
recommended for reflection-free performance. For those
applications, a back-termination series resistor at the
amplifier's output will isolate the amplifier from the cable and
allow extensive capacitive drive. However, other applications
may have high capacitive loads without a back-termination
resistor. Again, a small series resistor at the output can help
to reduce peaking.
Disable/Power-Down
The EL5177 can be disabled and placed its outputs in a high
impedance state. The turn off time is about 1.2μs and the
turn on time is about 130ns. When disabled, the amplifier's
supply current is reduced to 1.7μA for I
S
+ and 120μA for I
S
-
typically, thereby effectively eliminating the power
consumption. The amplifier's power down can be controlled
by standard CMOS signal levels at the EN pin. The applied
logic signal is relative to V
S
+ pin. Letting the EN pin float or
applying a signal that is less than 1.5V below V
S
+ will enable
the amplifier. The amplifier will be disabled when the signal
at EN pin is above V
S
+ - 0.5V.
Output Drive Capability
The EL5177 has internal short circuit protection. Its typical
short circuit current is ±40mA. If the output is shorted
indefinitely, the power dissipation could easily increase such
that the part will be destroyed. Maximum reliability is
maintained if the output current never exceeds ±40mA. This
limit is set by the design of the internal metal interconnect.
Power Dissipation
With the high output drive capability of the EL5177. It is
possible to exceed the 135°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 the load
conditions or package types need to be modified for the
amplifier 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
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:
Where:
V
S
= Total supply voltage
I
SMAX
= Maximum quiescent supply current per channel
V
O
= Maximum differential output voltage of the
application
R
LD
= Differential load resistance
I
LOAD
= Load current
By setting the two PD
MAX
equations equal to each other, we
can solve the output current and R
LD
to avoid the device
overheat.
Power Supply Bypassing and Printed Circuit
Board Layout
As with any high frequency device, a good printed circuit
board layout is necessary for optimum performance. Lead
lengths should be as sort 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 supplies are to
be used. In this case, the V
S
- pin becomes the negative
supply rail.
Gain
BW
200MHz
=
×
PD
MAX
T
--------------------------------------------
T
JA
–
=
PD
V
S
I
SMAX
V
S
V
O
LD
-----------
×
+
×
=
EL5177
相關(guān)PDF資料 |
PDF描述 |
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| EL5177IYZ-T7 | 550MHz Differential Twisted-Pair Driver |
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相關(guān)代理商/技術(shù)參數(shù) |
參數(shù)描述 |
|---|---|
| EL5177IYZ-T13 | 功能描述:差分放大器 EL5177IYZ 200MHZ DIF FRNTL DRVR XTRA CONT RoHS:否 制造商:Texas Instruments 通道數(shù)量:1 Channel 帶寬:2.4 GHz 可用增益調(diào)整:6 dB to 26 dB 輸入補償電壓: 共模抑制比（最小值）:- 40 dB 工作電源電壓:4.75 V to 5.25 V 電源電流:100 mA 最大工作溫度:+ 85 C 最小工作溫度:- 40 C 安裝風格:SMD/SMT 封裝 / 箱體:WQFN-24 封裝:Reel |
| EL5177IYZ-T7 | 功能描述:差分放大器 EL5177IYZ 200MHZ DIF FRNTL DRVR XTRA CONT RoHS:否 制造商:Texas Instruments 通道數(shù)量:1 Channel 帶寬:2.4 GHz 可用增益調(diào)整:6 dB to 26 dB 輸入補償電壓: 共模抑制比（最小值）:- 40 dB 工作電源電壓:4.75 V to 5.25 V 電源電流:100 mA 最大工作溫度:+ 85 C 最小工作溫度:- 40 C 安裝風格:SMD/SMT 封裝 / 箱體:WQFN-24 封裝:Reel |
| EL5178IS | 功能描述:IC DRVR TWISTED SGL 700MHZ 8SOIC RoHS:否 類別:集成電路 (IC) >> Linear - Amplifiers - Instrumentation 系列:- 標準包裝: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） 供應商設(shè)備封裝:10-MSOP 包裝:管件 |
| EL5178IS-T13 | 功能描述:IC DRVR TWISTED SGL 700MHZ 8SOIC RoHS:否 類別:集成電路 (IC) >> Linear - Amplifiers - Instrumentation 系列:- 標準包裝: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） 供應商設(shè)備封裝:10-MSOP 包裝:管件 |
| EL5178IS-T7 | 功能描述:IC DRVR TWISTED SGL 700MHZ 8SOIC RoHS:否 類別:集成電路 (IC) >> Linear - Amplifiers - Instrumentation 系列:- 標準包裝: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） 供應商設(shè)備封裝:10-MSOP 包裝:管件 |
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