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參數(shù)資料
| 型號： | MIC921BC5 TR |
| 廠商： | Micrel Inc |
| 文件頁數(shù)： | 2/11頁 |
| 文件大?。?/td> | 0K |
| 描述： | IC OPAMP 45MHZ HS LP SC70-5 |
| 標(biāo)準(zhǔn)包裝： | 3,000 |
| 放大器類型： | 通用 |
| 電路數(shù)： | 1 |
| 轉(zhuǎn)換速率： | 3200 V/µs |
| 增益帶寬積： | 45MHz |
| -3db帶寬： | 61MHz |
| 電流 - 輸入偏壓： | 130nA |
| 電壓 - 輸入偏移： | 400µV |
| 電流 - 電源： | 360µA |
| 電流 - 輸出 / 通道： | 59mA |
| 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： | MIC921BC5TR MIC921BC5TR-ND |
MIC921
Micrel, Inc.
MIC921
10
April 2006
Applications Information
The MIC921 is a high-speed, voltage-feedback operational
amplier featuring very low supply current and excellent
stability. This device is unity gain stable, capable of driving
high capacitance loads.
Driving High Capacitance
The MIC921 is stable when driving high capacitance, making
it ideal for driving long coaxial cables or other high-capaci-
tance loads. 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 add-
ing a small resistor (<100Ω) in series with the
output.
Feedback Resistor Selection
Conventionalopampgaincongurationsandresistorselection
apply, the MIC921 is NOT a current feedback device.
Also, for minimum peaking, the feedback resistor should have
low parasitic capacitance, usually 470Ω 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 follow-
ing guidelines should be observed: Capacitance, particularly
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 10F 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
resistance). Surface-mount ceramic capacitors are ideal.
Thermal Considerations
The SC70-5 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 particular CMRR will reduce.
An MIC921 with no load, dissipates power equal to the qui-
escent supply current * supply voltage
PD(no load) = VV+ – VV- IS
(
)
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.
PD(output stage) = VV+ – VOUT IOUT
(
)
Total Power Dissipation = PD(no load) + PD(output stage)
Ensure the total power dissipated in the device is no greater
than the thermal capacity of the package. The SC70-5 pack-
age has a thermal resistance of 450°C/W.
Max. Allowable Power Dissipation =
TJ(max) – TA(max)
450°C/W
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相關(guān)代理商/技術(shù)參數(shù) |
參數(shù)描述 |
|---|---|
| MIC921BM5 | 制造商:MICREL 制造商全稱:Micrel Semiconductor 功能描述:45MHz Low-Power SC-70 Op Amp |
| MIC921YC5 | 制造商:MICREL 制造商全稱:Micrel Semiconductor 功能描述:45MHz Low-Power SC-70 Op Amp |
| MIC921YC5 TR | 功能描述:運(yùn)算放大器 - 運(yùn)放 Op Amp 3200V/us, 300uA, 45MHz, SC70 (Lead Free) 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 |
| MIC921YC5-TR | 功能描述:General Purpose Amplifier 1 Circuit SC-70-5 制造商:microchip technology 系列:- 包裝:剪切帶（CT） 零件狀態(tài):Last Time Buy 放大器類型:通用 電路數(shù):1 輸出類型:- 壓擺率:3200 V/μs 增益帶寬積:45MHz -3db 帶寬:61MHz 電流 - 輸入偏置:130nA 電壓 - 輸入失調(diào):400μV 電流 - 電源:360μA 電流 - 輸出/通道:59mA 電壓 - 電源，單/雙（±）:±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:5-TSSOP，SC-70-5，SOT-353 供應(yīng)商器件封裝:SC-70-5 標(biāo)準(zhǔn)包裝:1 |
| MIC922 | 制造商:MICREL 制造商全稱:Micrel Semiconductor 功能描述:230MHz Low-Power SC-70 Op Amp |
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