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參數(shù)資料
| 型號(hào)： | MIC914BM5 |
| 廠商： | MICREL INC |
| 元件分類： | 運(yùn)動(dòng)控制電子 |
| 英文描述： | 10000 SYSTEM GATE LOGIC CELL ARRAY - NOT RECOMMENDED for NEW DESIGN |
| 中文描述： | OP-AMP, 16000 uV OFFSET-MAX, 300 MHz BAND WIDTH, PDSO5 |
| 封裝： | SOT-23, 5 PIN |
| 文件頁(yè)數(shù)： | 10/12頁(yè) |
| 文件大小： | 201K |
| 代理商： | MIC914BM5 |
MIC914
Applications Information
The MIC914 is a high-speed, voltage-feedback operational
amplifier featuring very low supply current and excellent
stability. This device is unity gain stable with R
L
≤
200
and
capable of driving high capacitance loads.
Stability Considerations
The MIC914 is unity gain stable and it is capable of driving
unlimited capacitance loads, but some design considerations
are required to ensure stability.
The output needs to be
loaded with 200
resistance or less and/or have suffi-
cient load capacitance to achieve stability (refer to the
“
Load Capacitance vs. Phase Margin
”
graph).
For applications requiring a little less speed, Micrel offers the
MIC911, a more heavily compensated version of the MIC914
which provides extremely stable operation for all load resis-
tance and capacitance.
For stability considerations at different supply voltages, please
refer to the graph elsewhere in the datasheet entitled "Gain
Bandwidth and Phase Margin vs. Supply Voltage".
Driving High Capacitance
The MIC914 is stable when driving high capacitance (see
“
Typical Characteristics: Gain Bandwidth and Phase Margin
vs. Load Capacitance
”
) making it ideal for driving long coaxial
cables or other high-capacitance 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 (see
“
Typical Characteris-
tics: Gain Bandwidth and Phase Margin vs.
Load
”
). In applications where the load capaci-
tance reduces the speed of the op amp to an
unacceptable level, the effect of the load capaci-
tance 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 MIC914 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.
Micrel
MIC914
10
June 2000
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
μ
F capacitor in parallel with a 0.1
μ
F 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, 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 MIC914 with no load, dissipates power equal to the
quiescent supply current * supply voltage
(
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.
(
P
V
V
I
D
V
V
S
(noload)
=
)
+
P
V
V
I
D
V
OUT
OUT
(output stage)
=
)
+
TotalPower Dissipation
P
P
D
D
=
+
(noload)
(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 260
°
C/W.
Max.
T
T
J
A
=
(max)
(max)
260W
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相關(guān)代理商/技術(shù)參數(shù) |
參數(shù)描述 |
|---|---|
| MIC914BM5 TR | 功能描述:IC OPAMP 160MHZ HS LP SOT23-5 RoHS:否 類別:集成電路 (IC) >> Linear - Amplifiers - Instrumentation 系列:IttyBitty® 標(biāo)準(zhǔn)包裝:2,500 系列:- 放大器類型:通用 電路數(shù):1 輸出類型:滿擺幅 轉(zhuǎn)換速率:0.11 V/µs 增益帶寬積:350kHz -3db帶寬:- 電流 - 輸入偏壓:4nA 電壓 - 輸入偏移:20µV 電流 - 電源:260µA 電流 - 輸出 / 通道:20mA 電壓 - 電源，單路/雙路(±):2.7 V ~ 36 V，±1.35 V ~ 18 V 工作溫度:-40°C ~ 85°C 安裝類型:表面貼裝 封裝/外殼:8-SOIC（0.154"，3.90mm 寬） 供應(yīng)商設(shè)備封裝:8-SO 包裝:帶卷 (TR) |
| MIC914BM5TR | 制造商:Rochester Electronics LLC 功能描述:- Tape and Reel |
| MIC914YM5 | 制造商:MICREL 制造商全稱:Micrel Semiconductor 功能描述:160MHz Low-Power SOT23-5 Op Amp |
| MIC914YM5 TR | 功能描述:運(yùn)算放大器 - 運(yùn)放 160MHz, 1.25mA High Speed Op Amp 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 |
| MIC914YM5-TR | 功能描述:Voltage Feedback Amplifier 1 Circuit SOT-23-5 制造商:microchip technology 系列:IttyBitty? 包裝:剪切帶（CT） 零件狀態(tài):Last Time Buy 放大器類型:電壓反饋 電路數(shù):1 輸出類型:- 壓擺率:500 V/μs 增益帶寬積:350MHz -3db 帶寬:240MHz 電流 - 輸入偏置:5.5μA 電壓 - 輸入失調(diào):1mV 電流 - 電源:4.2mA 電流 - 輸出/通道:90mA 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:SC-74A，SOT-753 供應(yīng)商器件封裝:SOT-23-5 標(biāo)準(zhǔn)包裝:1 |
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