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參數(shù)資料
| 型號(hào)： | LT1228CS8 |
| 廠商： | Linear Technology |
| 文件頁數(shù)： | 5/22頁 |
| 文件大?。?/td> | 0K |
| 描述： | IC CURRNT FEEDBK AMP 100MHZ8SOIC |
| 標(biāo)準(zhǔn)包裝： | 100 |
| 放大器類型： | 電流反饋 |
| 電路數(shù)： | 1 |
| 轉(zhuǎn)換速率： | 3500 V/µs |
| -3db帶寬： | 100MHz |
| 電流 - 輸入偏壓： | 10µA |
| 電壓 - 輸入偏移： | 3000µV |
| 電流 - 電源： | 6mA |
| 電流 - 輸出 / 通道： | 125mA |
| 電壓 - 電源，單路/雙路(±)： | 4 V ~ 36 V，±2 V ~ 18 V |
| 工作溫度： | 0°C ~ 70°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： | 管件 |
LT1228
13
1228fd
APPLICATIONS INFORMATION
Capacitive Loads
TheLT1228currentfeedbackamplifiercandrivecapacitive
loadsdirectlywhenthepropervalueoffeedbackresistoris
used.ThegraphofMaximumCapacitiveLoadvsFeedback
Resistor should be used to select the appropriate 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
amplifierismorestableathighergains,anddrivingheavier
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 inde-
pendent 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
signalswillturnonthenormallyreversebiasedemitterson
theinputtransistorsandenhancetheslewratesignificantly.
This enhanced slew rate can be as much as 3500V/s!
Current Feedback Amp Large-Signal Response
VS = ±15V, RF = RG = 750 Slew 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 feed-
back 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 20s. The thermal
settling component comes from the output and the input
stage. The output contributes just under 1mV/V of output
changeandtheinputcontributes300V/Vofinputchange.
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.
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參數(shù)描述 |
|---|---|
| LT1228CS8#PBF | 功能描述:IC CURRNT FEEDBK AMP 100MHZ8SOIC RoHS:是 類別:集成電路 (IC) >> Linear - Amplifiers - Instrumentation 系列:- 標(biāo)準(zhǔn)包裝:2,500 系列:- 放大器類型:通用 電路數(shù):4 輸出類型:- 轉(zhuǎn)換速率:0.6 V/µs 增益帶寬積:1MHz -3db帶寬:- 電流 - 輸入偏壓:45nA 電壓 - 輸入偏移:2000µV 電流 - 電源:1.4mA 電流 - 輸出 / 通道:40mA 電壓 - 電源，單路/雙路(±):3 V ~ 32 V，±1.5 V ~ 16 V 工作溫度:0°C ~ 70°C 安裝類型:表面貼裝 封裝/外殼:14-TSSOP（0.173"，4.40mm 寬） 供應(yīng)商設(shè)備封裝:14-TSSOP 包裝:帶卷 (TR) 其它名稱:LM324ADTBR2G-NDLM324ADTBR2GOSTR |
| LT1228CS8#TR | 功能描述:IC AMP CURR FEEDBCK 100MHZ 8SOIC RoHS:否 類別:集成電路 (IC) >> Linear - Amplifiers - Instrumentation 系列:- 標(biāo)準(zhǔn)包裝:73 系列:Over-The-Top® 放大器類型:通用 電路數(shù):4 輸出類型:滿擺幅 轉(zhuǎn)換速率:0.07 V/µs 增益帶寬積:200kHz -3db帶寬:- 電流 - 輸入偏壓:1nA 電壓 - 輸入偏移:285µV 電流 - 電源:50µA 電流 - 輸出 / 通道:25mA 電壓 - 電源，單路/雙路(±):2 V ~ 44 V，±1 V ~ 22 V 工作溫度:-40°C ~ 85°C 安裝類型:表面貼裝 封裝/外殼:16-WFDFN 裸露焊盤 供應(yīng)商設(shè)備封裝:16-DFN-EP（5x3） 包裝:管件 |
| LT1228CS8#TRPBF | 功能描述:IC CURRNT FEEDBK AMP 100MHZ8SOIC RoHS:是 類別:集成電路 (IC) >> Linear - Amplifiers - Instrumentation 系列:- 標(biāo)準(zhǔn)包裝:73 系列:Over-The-Top® 放大器類型:通用 電路數(shù):4 輸出類型:滿擺幅 轉(zhuǎn)換速率:0.07 V/µs 增益帶寬積:200kHz -3db帶寬:- 電流 - 輸入偏壓:1nA 電壓 - 輸入偏移:285µV 電流 - 電源:50µA 電流 - 輸出 / 通道:25mA 電壓 - 電源，單路/雙路(±):2 V ~ 44 V，±1 V ~ 22 V 工作溫度:-40°C ~ 85°C 安裝類型:表面貼裝 封裝/外殼:16-WFDFN 裸露焊盤 供應(yīng)商設(shè)備封裝:16-DFN-EP（5x3） 包裝:管件 |
| LT1228CS8PBF | 制造商:Linear Technology 功能描述:LT1228CS8PBF |
| LT1228IN8 | 制造商:LINER 制造商全稱:Linear Technology 功能描述:100MHz Current Feedback Amplifier with DC Gain Control |
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