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參數(shù)資料
| 型號： | MIC918BC5 TR |
| 廠商： | Micrel Inc |
| 文件頁數(shù)： | 6/7頁 |
| 文件大?。?/td> | 0K |
| 描述： | IC OPAMP 51MHZ HS LP SC70-5 |
| 標(biāo)準(zhǔn)包裝： | 3,000 |
| 放大器類型： | 電壓反饋 |
| 電路數(shù)： | 1 |
| 轉(zhuǎn)換速率： | 1500 V/µs |
| 增益帶寬積： | 51MHz |
| -3db帶寬： | 109MHz |
| 電流 - 輸入偏壓： | 230nA |
| 電壓 - 輸入偏移： | 300µV |
| 電流 - 電源： | 550µA |
| 電流 - 輸出 / 通道： | 65mA |
| 電壓 - 電源，單路/雙路(±)： | ±2.5 V ~ 9 V |
| 工作溫度： | -40°C ~ 85°C |
| 安裝類型： | 表面貼裝 |
| 封裝/外殼： | 6-TSSOP（5 引線），SC-88A，SOT-353 |
| 供應(yīng)商設(shè)備封裝： | SC-70-5 |
| 包裝： | 帶卷 (TR) |
| 其它名稱： | MIC918BC5TR MIC918BC5TR-ND |
MIC918
Micrel
MIC918
6
October 2001
Applications Information
The MIC918 is a high-speed, voltage-feedback operational
amplifier featuring very low supply current and excellent
stability. This device is unity gain stable, capable of driving
high capacitance loads.
Driving High Capacitance
The MIC918 is stable when driving high capacitance, making
it ideal for driving long coaxial cables or other high-capaci-
tance loads.
Phase margin remains constant as load capacitance is
increased. Most high-speed op amps are only able to drive
limited capacitance.
Note: increasing load capacitance does reduce
the speed of the device. In applications where
the load capacitance reduces the speed of the
op amp to an unacceptable level, the effect of
the load capacitance can be reduced by adding
a small resistor (<100
) in series with the
output.
Feedback Resistor Selection
Conventional op amp gain configurations and resistor selec-
tion apply, the MIC918 is NOT a current feedback device.
Also, for minimum peaking, the feedback resistor should
have low parasitic capacitance, usually 470
is ideal. To use
the part as a follower, the output should be connected to input
via a short wire.
Layout Considerations
All high speed devices require careful PCB layout. The
following guidelines should be observed: Capacitance, par-
ticularly on the two inputs pins will degrade performance;
avoid large copper traces to the inputs. Keep the output signal
away from the inputs and use a ground plane.
It is important to ensure adequate supply bypassing capaci-
tors are located close to the device.
Power Supply Bypassing
Regular supply bypassing techniques are recommended. A
10
F capacitor in parallel with a 0.1F capacitor on both the
positive and negative supplies are ideal. For best perfor-
mance all bypassing capacitors should be located as close to
the op amp as possible and all capacitors should be low ESL
(equivalent series inductance), ESR (equivalent series resis-
tance). Surface-mount ceramic capacitors are ideal.
Thermal Considerations
The SOT-23-5 package and the SC-70 package, like all small
packages, has a high thermal resistance. It is important to
ensure the IC does not exceed the maximum operating
junction (die) temperature of 85
°C. The part can be operated
up to the absolute maximum temperature rating of 125
°C, but
between 85
°C and 125°C performance will degrade, in par-
ticular CMRR will reduce.
An MIC918 with no load, dissipates power equal to the
quiescent supply current
× supply voltage
PV
V
I
DV
V
S
(no load) =
()
+
When a load is added, the additional power is dissipated in
the output stage of the op amp. The power dissipated in the
device is a function of supply voltage, output voltage and
output current.
PV
V
I
DV
OUT
(output stage) =
()
+
Total Power Dissipation
P
DD
t
=+
(no load)
(outpu stage)
Ensure the total power dissipated in the device is no greater
than the thermal capacity of the package. The SOT23-5
package has a thermal resistance of 260C/W.
Max Allowable Power Dissipation
TT
JA
.
=
(max)
260W
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相關(guān)代理商/技術(shù)參數(shù) |
參數(shù)描述 |
|---|---|
| MIC918BM5 | 制造商:MICREL 制造商全稱:Micrel Semiconductor 功能描述:51MHz Low-Power SOT-23-5/SC-70 Op Amp |
| MIC918YC5 | 制造商:Rochester Electronics LLC 功能描述: 制造商:RF Micro Devices Inc 功能描述: 制造商:Micrel Inc 功能描述: |
| MIC918YC5 TR | 功能描述:運(yùn)算放大器 - 運(yùn)放 Op Amp 1500V/us, 550uA, 51MHz, SC70 RoHS:否 制造商:STMicroelectronics 通道數(shù)量:4 共模抑制比（最小值）:63 dB 輸入補(bǔ)償電壓:1 mV 輸入偏流（最大值）:10 pA 工作電源電壓:2.7 V to 5.5 V 安裝風(fēng)格:SMD/SMT 封裝 / 箱體:QFN-16 轉(zhuǎn)換速度:0.89 V/us 關(guān)閉:No 輸出電流:55 mA 最大工作溫度:+ 125 C 封裝:Reel |
| MIC919 | 制造商:MICREL 制造商全稱:Micrel Semiconductor 功能描述:27MHz Low-Power SOT-23-5/SC-70 Op Amp |
| MIC919BC5 | 制造商:Rochester Electronics LLC 功能描述:- Bulk |
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