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參數(shù)資料
| 型號： | EL5175IYZ-T7 |
| 廠商： | Intersil |
| 文件頁數(shù)： | 3/15頁 |
| 文件大小： | 0K |
| 描述： | IC LINE RCVR 550MHZ SGL 8-MSOP |
| 標(biāo)準(zhǔn)包裝： | 1 |
| 放大器類型： | 差分 |
| 電路數(shù)： | 1 |
| 轉(zhuǎn)換速率： | 900 V/µs |
| 增益帶寬積： | 200MHz |
| -3db帶寬： | 550MHz |
| 電流 - 輸入偏壓： | 12.5µA |
| 電壓 - 輸入偏移： | 3000µV |
| 電流 - 電源： | 9.6mA |
| 電流 - 輸出 / 通道： | 67mA |
| 電壓 - 電源，單路/雙路(±)： | 4.75 V ~ 11 V，±2.38 V ~ 5.5 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： | 8-MSOP |
| 包裝： | 標(biāo)準(zhǔn)包裝 |
| 產(chǎn)品目錄頁面： | 1239 (CN2011-ZH PDF) |
| 其它名稱： | EL5175IYZ-T7DKR |
11
FN7306.7
August 25, 2010
power consumption. The amplifier's power-down can be
controlled by standard CMOS signal levels at the ENABLE
pin. The applied logic signal is relative to the VS+ pin. Letting
the EN pin float or applying a signal that is less than 1.5V
below VS+ will enable the amplifier. The amplifier will be
disabled when the signal at the EN pin is above VS+ - 0.5V.
If a TTL signal is used to control the enabled/disabled
function, Figure 26 could be used to convert the TTL signal
to CMOS signal.
Output Drive Capability
The EL5175 and EL5375 have internal short circuit
protection. Its typical short circuit current is ±67mA. 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 ±60mA. This limit is set by the design of the internal
metal interconnections.
Power Dissipation
With the high output drive capability of the EL5175 and
EL5375, 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 Equation 3:
TJMAX = Maximum junction temperature
TAMAX = Maximum ambient temperature
θJA = Thermal resistance of the package
Assume the REF pin is tired to GND for VS = ±5V
application, 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, see Equation 4:
For sinking, see Equation 5:
Where:
VS = Total supply voltage
ISMAX = Maximum quiescent supply current per channel
VOUT = Maximum output voltage of the application
RLOAD = Load resistance
ILOAD = Load current
i = Number of channels
By setting the two PDMAX equations equal to each other, we
can solve the output current and RLOAD 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 short as possible. The power supply
pin must be well bypassed to reduce the risk of oscillation.
For normal single supply operation, where the VS- pin is
connected to the ground plane, a single 4.7F tantalum
capacitor in parallel with a 0.1F ceramic capacitor from VS+
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 VS- 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 that can result in
compromised performance. Minimizing parasitic capacitance
at the amplifier's inverting input pin is very important. The
feedback resistor should be placed very close to the
inverting input pin. Strip line design techniques are
recommended for the signal traces.
1k
10k
5V
EN
CMOS/TTL
FIGURE 26. CONVERSION OF TTL SIGNAL TO CMOS SIGNAL
PDMAX
TJMAX TAMAX
–
Θ
JA
---------------------------------------------
=
(EQ. 3)
PDMAX
VS ISMAX VS+
(
VOUT)
VOUT
RLOAD
--------------------
i
×
–
+
×
=
(EQ. 4)
PDMAX
VS ISMAX VOUT
(
VS-) ILOAD] i
×
–
+
×
[
=
(EQ. 5)
EL5175, EL5375
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