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| 型號： | MC33077P |
| 廠商： | MOTOROLA INC |
| 元件分類： | 運(yùn)動控制電子 |
| 英文描述： | DUAL, LOW NOISE OPERATIONAL AMPLIFIER |
| 中文描述： | DUAL OP-AMP, 1500 uV OFFSET-MAX, 37 MHz BAND WIDTH, PDIP8 |
| 封裝： | PLASTIC, DIP-8 |
| 文件頁數(shù)： | 10/12頁 |
| 文件大?。?/td> | 237K |
| 代理商： | MC33077P |
MC33077
10
MOTOROLA ANALOG IC DEVICE DATA
APPLICATIONS INFORMATION
The MC33077 is designed primarily for its low noise, low
offset voltage, high gain bandwidth product and large output
swing characteristics. Its outstanding high frequency
gain/phase performance make it a very attractive amplifier for
high quality preamps, instrumentation amps, active filters
and other applications requiring precision quality
characteristics.
The MC33077 utilizes high frequency lateral PNP input
transistors in a low noise bipolar differential stage driving a
compensated Miller integration amplifier. Dual–doublet
frequency compensation techniques are used to enhance the
gain bandwidth product. The output stage uses an all NPN
transistor design which provides greater output voltage swing
and improved frequency performance over more
conventional stages by using both PNP and NPN transistors
(Class AB). This combination produces an amplifier with
superior characteristics.
Through precision component matching and innovative
current mirror design, a lower than normal temperature
coefficient of input offset voltage (2.0
μ
V/
°
C as opposed to 10
μ
V/
°
C), as well as low input offset voltage, is accomplished.
The minimum common mode input range is from 1.5 V
below the positive rail (VCC) to 1.5 V above the negative rail
(VEE). The inputs will typically common mode to within 1.0 V
of both negative and positive rails though degradation in
offset voltage and gain will be experienced as the common
mode voltage nears either supply rail. In practice, though not
recommended, the input voltage may exceed VCC by
approximately 30 V and decrease below the VEE by
approximately 0.6 V without causing permanent damage to
the device. If the input voltage on either or both inputs is less
than approximately 0.6 V, excessive current may flow, if not
limited, causing permanent damage to the device.
The amplifier will not latch with input source currents up to
20 mA, though in practice, source currents should be limited
to 5.0 mA to avoid any parametric damage to the device. If
both inputs exceed VCC, the output will be in the high state
and phase reversal may occur. No phase reversal will occur
if the voltage on one input is within the common mode range
and the voltage on the other input exceeds VCC. Phase
reversal may occur if the input voltage on either or both inputs
is less than 1.0 V above the negative rail. Phase reversal will
be experienced if the voltage on either or both inputs is less
than VEE.
Through the use of dual–doublet frequency compensation
techniques, the gain bandwidth product has been greatly
enhanced over other amplifiers using the conventional single
pole compensation. The phase and gain error of the amplifier
remains low to higher frequencies for fixed amplifier gain
configurations.
With the all NPN output stage, there is minimal swing loss
to the supply rails, producing superior output swing, no
crossover distortion and improved output phase symmetry
with output voltage excursions (output phase symmetry
being the amplifiers ability to maintain a constant phase
relation independent of its output voltage swing). Output
phase symmetry degradation in the more conventional PNP
and NPN transistor output stage was primarily due to the
inherent cut–off frequency mismatch of the PNP and NPN
transistors used (typically 10 MHz and 300 MHz,
respectively), causing considerable phase change to occur
as the output voltage changes. By eliminating the PNP in the
output, such phase change has been avoided and a very
significant improvement in output phase symmetry as well as
output swing has been accomplished.
The output swing improvement is most noticeable when
operation is with lower supply voltages (typically 30% with
±
5.0 V supplies). With a 10 k load, the output of the amplifier
can typically swing to within 1.0 V of the positive rail (VCC),
and to within 0.3 V of the negative rail (VEE), producing a 28.7
Vpp signal from
±
15 V supplies. Output voltage swing can be
further improved by using an output pull–up resistor
referenced to the VCC. Where output signals are referenced
to the positive supply rail, the pull–up resistor will pull the
output to VCC during the positive swing, and during the
negative swing, the NPN output transistor collector will pull
the output very near VEE. This configuration will produce the
maximum attainable output signal from given supply
voltages. The value of load resistance used should be much
less than any feedback resistance to avoid excess loading
and allow easy pull–up of the output.
Output impedance of the amplifier is typically less than
50
at frequencies less than the unity gain crossover
frequency (see Figure 18). The amplifier is unity gain stable
with output capacitance loads up to 500 pF at full output
swing over the –55
°
to +125
°
C temperature range. Output
phase symmetry is excellent with typically 4
°
C total phase
change over a 20 V output excursion at 25
°
C with a 2.0 k
and 100 pF load. With a 2.0 k
resistive load and no
capacitance loading, the total phase change is approximately
one degree for the same 20 V output excursion. With a
2.0 k
and 500 pF load at 125
°
C, the total phase change is
typically only 10
°
C for a 20 V output excursion (see Figure
27).
As with all amplifiers, care should be exercised to insure
that one does not create a pole at the input of the amplifier
which is near the closed loop corner frequency. This
becomes a greater concern when using high frequency
amplifiers since it is very easy to create such a pole with
relatively small values of resistance on the inputs. If this does
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相關(guān)代理商/技術(shù)參數(shù) |
參數(shù)描述 |
|---|---|
| MC33077PG | 功能描述:運(yùn)算放大器 - 運(yùn)放 Dual 11V/us Low Noise Ind. Temp 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 |
| MC33077PG | 制造商:ON Semiconductor 功能描述:IC OP AMP DUAL LOW NOISE PDIP8 |
| MC33078 | 制造商:MOTOROLA 制造商全稱:Motorola, Inc 功能描述:Amplifiers and Comparators |
| MC33078_06 | 制造商:STMICROELECTRONICS 制造商全稱:STMicroelectronics 功能描述:Low Noise Dual Operational Amplifier |
| MC33078_08 | 制造商:STMICROELECTRONICS 制造商全稱:STMicroelectronics 功能描述:Low noise dual operational amplifier |
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