参数资料
| 型号： | LT1228CN8 |
| 厂商： | Linear Technology |
| 文件页数： | 4/22页 |
| 文件大小： | 0K |
| 描述： | IC CURRNT FEEDBCK AMP100MHZ 8DIP |
| 标准包装： | 50 |
| 放大器类型： | 电流反馈 |
| 电路数： | 1 |
| 转换速率： | 3500 V/µs |
| -3db带宽： | 100MHz |
| 电流 - 输入偏压： | 10µA |
| 电压 - 输入偏移： | 3000µV |
| 电流 - 电源： | 6mA |
| 电流 - 输出 / 通道： | 125mA |
| 电压 - 电源，单路/双路(±)： | 4 V ~ 36 V，±2 V ~ 18 V |
| 工作温度： | 0°C ~ 70°C |
| 安装类型： | 通孔 |
| 封装/外壳： | 8-DIP（0.300"，7.62mm） |
| 供应商设备封装： | 8-PDIP |
| 包装： | 管件 |
LT1228
12
1228fd
APPLICATIONS INFORMATION
show the effect of loading. These graphs also show the
family of curves that result from various values of the
feedback resistor. These curves use a solid line when the
response has less than 0.5dB of peaking and a dashed line
for the response with 0.5dB to 5dB of peaking. The curves
stop where the response has more than 5dB of peaking.
Current Feedback Amp Small-Signal Response
VS = ±15V, RF = RG = 750, RL = 100
Capacitance on the Inverting Input
Current feedback amplifiers want resistive feedback from
the output to the inverting input for stable operation. Take
care to minimize the stray capacitance between the output
and the inverting input. Capacitance on the inverting input
to ground will cause peaking in the frequency response
(and overshoot in the transient response), but it does
not degrade the stability of the amplifier. The amount of
capacitance that is necessary to cause peaking is a func-
tion of the closed-loop gain taken. The higher the gain,
the more capacitance is required to cause peaking. For
example, in a gain of 100 application, the bandwidth can
be increased from 10MHz to 17MHz by adding a 2200pF
capacitor, as shown below. CG must have very low series
resistance, such as silver mica.
At a gain of two, on ±15V supplies with a 750 feedback
resistor, the bandwidth into a light load is over 160MHz
without peaking, but into a heavy load the bandwidth re-
duces to 100MHz. The loading has so much effect because
there is a mild resonance in the output stage that enhances
the bandwidth at light loads but has its Q reduced by the
heavy load. This enhancement is only useful at low gain
settings, at a gain of ten it does not boost the bandwidth.
At unity gain, the enhancement is so effective the value of
thefeedbackresistorhasverylittleeffectonthebandwidth.
At very high closed-loop gains, the bandwidth is limited
by the gain-bandwidth product of about 1GHz. The curves
show that the bandwidth at a closed-loop gain of 100 is
10MHz, only one tenth what it is at a gain of two.
LT1228 TA08
–
+
CG
RG
5.1
RF
510Ω
VOUT
CFA
VIN
6
1
8
Boosting Bandwidth of High Gain Amplifier
with Capacitance On Inverting Input
FREQUENCY (MHz)
1
19
GAIN
(dB)
22
25
28
31
46
49
10
100
LT1228 TA09
34
37
40
43
CG = 4700pF
CG = 2200pF
CG = 0
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相关代理商/技术参数 |
参数描述 |
|---|---|
| LT1228CN8#PBF | 功能描述:IC CURRNT FEEDBCK AMP100MHZ 8DIP RoHS:是 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 |
| LT1228CN8PBF | 制造商:Linear Technology 功能描述:LT1228CN8PBF |
| LT1228CS8 | 功能描述:IC CURRNT FEEDBK AMP 100MHZ8SOIC 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 |
| LT1228CS8#PBF | 功能描述:IC CURRNT FEEDBK AMP 100MHZ8SOIC 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 |
| LT1228CS8#TR | 功能描述:IC AMP CURR FEEDBCK 100MHZ 8SOIC 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 |
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