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| 型號： | LT1206CS8#PBF |
| 廠商： | Linear Technology |
| 文件頁數(shù)： | 2/18頁 |
| 文件大?。?/td> | 0K |
| 描述： | IC CURRNT FEEDBK AMP 250MA 8SOIC |
| 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： | 900 V/µs |
| -3db帶寬： | 60MHz |
| 電流 - 輸入偏壓： | 10µA |
| 電壓 - 輸入偏移： | 3000µV |
| 電流 - 電源： | 20mA |
| 電流 - 輸出 / 通道： | 1.2A |
| 電壓 - 電源，單路/雙路(±)： | 10 V ~ 30 V，±5 V ~ 15 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 |
| 產(chǎn)品目錄頁面： | 1317 (CN2011-ZH PDF) |
LT1206
10
1206fb
applicaTions inForMaTion
For applications where the full bandwidth of the amplifier
is not required, the quiescent current of the device may be
reduced by connecting a resistor from the shutdown pin
to ground. The quiescent current will be approximately 40
times the current in the shutdown pin. The voltage across
the resistor in this condition is V+ – 3VBE. For example, a
60k resistor will set the quiescent supply current to 10mA
with VS = ±15V.
Thephotos(Figures4aand4b)showtheeffectofreducing
the quiescent supply current on the large-signal response.
The quiescent current can be reduced to 5mA in the invert-
ing configuration without much change in response. In
noninverting mode, however, the slew rate is reduced as
the quiescent current is reduced.
Slew Rate
Unlike a traditional op amp, the slew rate of a current
feedback amplifier is not independent of the amplifier gain
configuration. There are slew rate limitations in both the
input stage and the output stage. In the inverting mode,
and for higher gains in the noninverting mode, the signal
amplitude on the input pins is small and the overall slew
rate is that of the output stage. The input stage slew rate
is related to the quiescent current and will be reduced as
the supply current is reduced. The output slew rate is set
by the value of the feedback resistors and the internal
capacitance.Largerfeedbackresistorswillreducetheslew
rate as will lower supply voltages, similar to the way the
bandwidth is reduced. The photos (Figures 5a, 5b and 5c)
show the large-signal response of the LT1206 for various
gain configurations. The slew rate varies from 860V/s
for a gain of 1, to 1400V/s for a gain of –1.
Figure 4a. Large-Signal Response vs IQ, AV = –1
Figure 4b. Large-Signal Response vs IQ, AV = 2
Figure 5a. Large-Signal Response, AV = 1
Figure 5b. Large-Signal Response, AV = –1
RF = 750
RL = 50
IQ = 5mA, 10mA, 20mA
VS = ±15V
50ns/DIV
1206 F04a
RF = 750
RL = 50
IQ = 5mA, 10mA, 20mA
VS = ±15V
50ns/DIV
1206 F04b
RF = 825
RL = 50
VS = ±15V
20ns/DIV
1206 F05a
RF = RG = 750
RL = 50
VS = ±15V
20ns/DIV
1206 F05b
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