参数资料
| 型号： | MIC921BC5 TR |
| 厂商： | Micrel Inc |
| 文件页数： | 2/11页 |
| 文件大小： | 0K |
| 描述： | IC OPAMP 45MHZ HS LP SC70-5 |
| 标准包装： | 3,000 |
| 放大器类型： | 通用 |
| 电路数： | 1 |
| 转换速率： | 3200 V/µs |
| 增益带宽积： | 45MHz |
| -3db带宽： | 61MHz |
| 电流 - 输入偏压： | 130nA |
| 电压 - 输入偏移： | 400µV |
| 电流 - 电源： | 360µA |
| 电流 - 输出 / 通道： | 59mA |
| 电压 - 电源，单路/双路(±)： | ±2.5 V ~ 9 V |
| 工作温度： | -40°C ~ 85°C |
| 安装类型： | 表面贴装 |
| 封装/外壳： | 6-TSSOP（5 引线），SC-88A，SOT-353 |
| 供应商设备封装： | SC-70-5 |
| 包装： | 带卷 (TR) |
| 其它名称： | 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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相关代理商/技术参数 |
参数描述 |
|---|---|
| MIC921BM5 | 制造商:MICREL 制造商全称:Micrel Semiconductor 功能描述:45MHz Low-Power SC-70 Op Amp |
| MIC921YC5 | 制造商:MICREL 制造商全称:Micrel Semiconductor 功能描述:45MHz Low-Power SC-70 Op Amp |
| MIC921YC5 TR | 功能描述:运算放大器 - 运放 Op Amp 3200V/us, 300uA, 45MHz, SC70 (Lead Free) RoHS:否 制造商:STMicroelectronics 通道数量:4 共模抑制比（最小值）:63 dB 输入补偿电压:1 mV 输入偏流（最大值）:10 pA 工作电源电压:2.7 V to 5.5 V 安装风格:SMD/SMT 封装 / 箱体:QFN-16 转换速度:0.89 V/us 关闭:No 输出电流:55 mA 最大工作温度:+ 125 C 封装:Reel |
| MIC921YC5-TR | 功能描述:General Purpose Amplifier 1 Circuit SC-70-5 制造商:microchip technology 系列:- 包装:剪切带（CT） 零件状态:Last Time Buy 放大器类型:通用 电路数:1 输出类型:- 压摆率:3200 V/μs 增益带宽积:45MHz -3db 带宽:61MHz 电流 - 输入偏置:130nA 电压 - 输入失调:400μV 电流 - 电源:360μA 电流 - 输出/通道:59mA 电压 - 电源，单/双（±）:±2.5 V ~ 9 V 工作温度:-40°C ~ 85°C 安装类型:表面贴装 封装/外壳:5-TSSOP，SC-70-5，SOT-353 供应商器件封装:SC-70-5 标准包装:1 |
| MIC922 | 制造商:MICREL 制造商全称:Micrel Semiconductor 功能描述:230MHz Low-Power SC-70 Op Amp |
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