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参数资料
| 型号： | LT1228MJ8#TRPBF |
| 厂商： | LINEAR TECHNOLOGY CORP |
| 元件分类： | 音频／视频放大 |
| 英文描述： | 1 CHANNEL, VIDEO AMPLIFIER, CDIP8 |
| 封装： | 0.300 INCH, HERMETIC SEALED, LEAD FREE, CERAMIC, DIP-8 |
| 文件页数： | 5/20页 |
| 文件大小： | 401K |
| 代理商： | LT1228MJ8#TRPBF |
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Capacitive Loads
The LT1228 current feedback amplifier can drive capaci-
tive loads directly when the proper value of feedback
resistor is used. The graph of Maximum Capacitive Load
vs Feedback Resistor should be used to select the appro-
priate value. The value shown is for 5dB peaking when
driving a 1k load, at a gain of 2. This is a worst case
condition, the amplifier is more stable at higher gains, and
driving heavier loads. Alternatively, a small resistor (10
to 20
) can be put in series with the output to isolate the
capacitive load from the amplifier output. This has the
advantage that the amplifier bandwidth is only reduced
when the capacitive load is present and the disadvantage
that the gain is a function of the load resistance.
Slew Rate
The slew rate of the current feedback amplifier is not
independent of the amplifier gain configuration the way it
is in a traditional op amp. This is because the input stage
and the output stage both have slew rate limitations. The
input stage of the LT1228 current feedback amplifier slews
at about 100V/
s before it becomes nonlinear. Faster
input signals will turn on the normally reverse biased
emitters on the input transistors and enhance the slew rate
significantly. This enhanced slew rate can be as much as
3500V/
s!
Current Feedback Amp Large-Signal Response
VS = ±15V, RF = RG = 750Slew Rate Enhanced
The output slew rate is set by the value of the feedback
resistors and the internal capacitance. At a gain of ten with
a 1k feedback resistor and
±15V supplies, the output slew
rate is typically 500V/
s and –850V/s. There is no input
stage enhancement because of the high gain. Larger
feedback resistors will reduce the slew rate as will lower
supply voltages, similar to the way the bandwidth is
reduced.
Current Feedback Amp Large-Signal Response
VS = ±15V, RF = 1k, RG = 110, RL = 400
Settling Time
The characteristic curves show that the LT1228 current
feedback amplifier settles to within 10mV of final value in
40ns to 55ns for any output step less than 10V. The curve
of settling to 1mV of final value shows that there is a slower
thermal contribution up to 20
s. The thermal settling
component comes from the output and the input stage.
The output contributes just under 1mV/V of output change
and the input contributes 300
V/V of input change.
Fortunately the input thermal tends to cancel the output
thermal. For this reason the noninverting gain of two
configuration settles faster than the inverting gain of one.
相关PDF资料 |
PDF描述 |
|---|---|
| LT1228MJ8#TR | 1 CHANNEL, VIDEO AMPLIFIER, CDIP8 |
| LT1304CS8-3.3#PBF | 1.2 A SWITCHING REGULATOR, 300 kHz SWITCHING FREQ-MAX, PDSO8 |
| LT1304CS8-3.3#TRPBF | 1.2 A SWITCHING REGULATOR, 300 kHz SWITCHING FREQ-MAX, PDSO8 |
| LT1304CS8-3.3#TR | 1.2 A SWITCHING REGULATOR, 300 kHz SWITCHING FREQ-MAX, PDSO8 |
| LT1319CS#PBF | INFRARED, RECEIVER IC, PDSO16 |
相关代理商/技术参数 |
参数描述 |
|---|---|
| LT1229 | 制造商:LINER 制造商全称:Linear Technology 功能描述:Dual and Quad 100MHz Current Feedback Amplifiers |
| LT1229C | 制造商:LINER 制造商全称:Linear Technology 功能描述:Dual and Quad 100MHz Current Feedback Amplifiers |
| LT1229CJ8 | 制造商:LINER 制造商全称:Linear Technology 功能描述:Dual and Quad 100MHz Current Feedback Amplifiers |
| LT1229CN8 | 功能描述:IC CURRNT FEEDBACK AMP DUAL 8DIP RoHS:否 类别:集成电路 (IC) >> Linear - Amplifiers - Instrumentation 系列:- 标准包装:73 系列:Over-The-Top® 放大器类型:通用 电路数:4 输出类型:满摆幅 转换速率:0.07 V/µs 增益带宽积:200kHz -3db带宽:- 电流 - 输入偏压:1nA 电压 - 输入偏移:285µV 电流 - 电源:50µA 电流 - 输出 / 通道:25mA 电压 - 电源，单路/双路(±):2 V ~ 44 V，±1 V ~ 22 V 工作温度:-40°C ~ 85°C 安装类型:表面贴装 封装/外壳:16-WFDFN 裸露焊盘 供应商设备封装:16-DFN-EP（5x3） 包装:管件 |
| LT1229CN8#PBF | 功能描述:IC CURRNT FEEDBACK AMP DUAL 8DIP RoHS:是 类别:集成电路 (IC) >> Linear - Amplifiers - Instrumentation 系列:- 标准包装:2,500 系列:- 放大器类型:通用 电路数:4 输出类型:- 转换速率:0.6 V/µs 增益带宽积:1MHz -3db带宽:- 电流 - 输入偏压:45nA 电压 - 输入偏移:2000µV 电流 - 电源:1.4mA 电流 - 输出 / 通道:40mA 电压 - 电源，单路/双路(±):3 V ~ 32 V，±1.5 V ~ 16 V 工作温度:0°C ~ 70°C 安装类型:表面贴装 封装/外壳:14-TSSOP（0.173"，4.40mm 宽） 供应商设备封装:14-TSSOP 包装:带卷 (TR) 其它名称:LM324ADTBR2G-NDLM324ADTBR2GOSTR |
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