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參數(shù)資料
| 型號： | HFA1100IBZ |
| 廠商： | Intersil |
| 文件頁數(shù)： | 5/10頁 |
| 文件大?。?/td> | 0K |
| 描述： | IC OP AMP 850MHZ CFB 8-SOIC |
| 標準包裝： | 98 |
| 放大器類型： | 電流反饋 |
| 電路數(shù)： | 1 |
| 轉換速率： | 2300 V/µs |
| -3db帶寬： | 850MHz |
| 電流 - 輸入偏壓： | 25µA |
| 電壓 - 輸入偏移： | 2000µV |
| 電流 - 電源： | 21mA |
| 電流 - 輸出 / 通道： | 60mA |
| 電壓 - 電源，單路/雙路(±)： | 4.5 V ~ 11 V，±2.25 V ~ 5.5 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） |
| 供應商設備封裝： | 8-SOIC |
| 包裝： | 管件 |
| 產品目錄頁面： | 1234 (CN2011-ZH PDF) |
4
FN2945.9
Application Information
Optimum Feedback Resistor (RF)
The enclosed plots of inverting and non-inverting frequency
response detail the performance of the HFA1100 in various
gains. Although the bandwidth dependency on ACL isn’t as
severe as that of a voltage feedback amplifier, there is an
appreciable decrease in bandwidth at higher gains. This
decrease can be minimized by taking advantage of the
current feedback amplifier’s unique relationship between
bandwidth and RF. All current feedback amplifiers require a
feedback resistor, even for unity gain applications, and the
RF, in conjunction with the internal compensation capacitor,
sets the dominant pole of the frequency response. Thus, the
amplifier’s bandwidth is inversely proportional to RF. The
HFA1100 design is optimized for a 510
R
F, at a gain of +1.
Decreasing RF in a unity gain application decreases stability,
resulting in excessive peaking and overshoot (Note:
Capacitive feedback causes the same problems due to the
feedback impedance decrease at higher frequencies). At
higher gains the amplifier is more stable, so RF can be
decreased in a trade-off of stability for bandwidth. The table
below lists recommended RF values for various gains, and the
expected bandwidth.
5V Single Supply Operation
This amplifier operates at single supply voltages down to
4.5V. The table below details the amplifier’s performance
with a single 5V supply. The dramatic supply current
reduction at this operating condition (refer also to Figure 23)
makes these op amps even better choices for low power 5V
systems. Refer to Application Note AN9745 for further
information.
Use of Die in Hybrid Applications
This amplifier is designed with compensation to negate the
package parasitics that typically lead to instabilities. As a
result, the use of die in hybrid applications results in
overcompensated performance due to lower parasitic
capacitances. Reducing RF below the recommended values
for packaged units will solve the problem. For AV = +2 the
recommended starting point is 300
, while unity gain
applications should try 400
.
PC Board Layout
The frequency performance of this amplifier depends a great
deal on the amount of care taken in designing the PC board.
The use of low inductance components such as chip
resistors and chip capacitors is strongly recommended,
while a solid ground plane is a must!
Attention should be given to decoupling the power supplies.
A large value (10
F) tantalum in parallel with a small value
chip (0.1
F) capacitor works well in most cases.
Terminated microstrip signal lines are recommended at the
input and output of the device. Output capacitance, such as
that resulting from an improperly terminated transmission
line will degrade the frequency response of the amplifier and
may cause oscillations. In most cases, the oscillation can be
avoided by placing a resistor in series with the output.
Care must also be taken to minimize the capacitance to ground
seen by the amplifier’s inverting input. The larger this
capacitance, the worse the gain peaking, resulting in pulse
overshoot and possible instability. To this end, it is
recommended that the ground plane be removed under traces
connected to pin 2, and connections to pin 2 should be kept as
short as possible.
An example of a good high frequency layout is the
Evaluation Board shown below.
Evaluation Board
An evaluation board is available for the HFA1100 (Part
Number HFA11XXEVAL). Please contact your local sales
office for information.
ACL
RF ()BW (MHz)
+1
510
850
-1
430
580
+2
360
670
+5
150
520
+10
180
240
+19
270
125
PARAMETER
TYP
Input Common Mode Range
1V to 4V
-3dB BW (AV = +2)
267MHz
Gain Flatness (to 50MHz, AV = +2)
0.05dB
Output Voltage (AV = -1)
1.3V to 3.8V
Slew Rate (AV = +2)
475V/
s
0.1% Settling Time
17ns
Supply Current
5.5mA
HFA1100
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相關代理商/技術參數(shù) |
參數(shù)描述 |
|---|---|
| HFA1100IBZ96 | 功能描述:運算放大器 - 運放 OPAMP 850MHZ CFB IND 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 安裝風格:SMD/SMT 封裝 / 箱體:QFN-16 轉換速度:0.89 V/us 關閉:No 輸出電流:55 mA 最大工作溫度:+ 125 C 封裝:Reel |
| HFA1100IJ | 制造商:Rochester Electronics LLC 功能描述:ULTRA HIGH SPEED CURRENT FEEDBACK OP AMP, 8 PIN CDIP - Bulk |
| HFA1100IP | 功能描述:IC OP AMP 850MHZ CFB 8-PDIP RoHS:否 類別:集成電路 (IC) >> Linear - Amplifiers - Instrumentation 系列:- 標準包裝:50 系列:- 放大器類型:通用 電路數(shù):2 輸出類型:滿擺幅 轉換速率:1.8 V/µs 增益帶寬積:6.5MHz -3db帶寬:4.5MHz 電流 - 輸入偏壓:5nA 電壓 - 輸入偏移:100µV 電流 - 電源:65µA 電流 - 輸出 / 通道:35mA 電壓 - 電源，單路/雙路(±):1.8 V ~ 5.25 V，±0.9 V ~ 2.625 V 工作溫度:-40°C ~ 85°C 安裝類型:表面貼裝 封裝/外殼:10-TFSOP，10-MSOP（0.118"，3.00mm 寬） 供應商設備封裝:10-MSOP 包裝:管件 |
| HFA1100MJ/883 | 制造商:INTERSIL 制造商全稱:Intersil Corporation 功能描述:850MHz Current Feedback Amplifier |
| HFA1102 | 制造商:INTERSIL 制造商全稱:Intersil Corporation 功能描述:600MHz Current Feedback Amplifier with Compensation Pin |
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