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參數資料
| 型號： | LT1223M |
| 廠商： | Linear Technology Corporation |
| 英文描述： | 100MHz Current Feedback Amplifier |
| 中文描述： | 100MHz的電流反饋放大器 |
| 文件頁數： | 9/12頁 |
| 文件大?。?/td> | 290K |
| 代理商： | LT1223M |
9
LT1223
U
S
A
O
PPLICATI
U
U
have about 2.5mV thermal tail on a 10V step. Unfortu-
nately, reducing the input signal and increasing the gain
always results in a thermal tail of about the same amount
for a given output step. For this reason we show separate
graphs of 10mV and 1mV non-inverting amplifier settling
times. Just as the bandwidth of the LT1223 is fairly
constant for various closed-loop gains, the settling time
remains constant as well.
Adjustable Gain Amplifier
To make a variable gain amplifier with the LT1223, vary the
value of R
G
. The implementation of R
G
can be a pot, a light
controlled resistor, a FET, or any other low capacitance
variable resistor. The value of R
F
should not be varied to
change the gain. If R
F
is changed, then the bandwidth will
be reduced at maximum gain and the circuit will oscillate
when R
F
is very small.
LT1223 TA03
+
–
IN
V
OUT
V
LT1223
R
F
R
G
Adjustable Bandwidth Amplifier
Because the resistance at the inverting input determines
the bandwidth of the LT1223, an adjustable bandwidth
circuit can be made easily. The gain is set as before with
R
F
and R
G
; the bandwidth is maximum when the variable
resistor is at a minimum.
Accurate Bandwidth Limiting The LT1223
It is very common to limit the bandwidth of an op amp by
putting a small capacitor in parallel with R
F
. DO NOT PUT
A SMALL CAPACITOR FROM THE INVERTING INPUT OF
A CURRENT FEEDBACK AMPLIFIER TO ANYWHERE ELSE,
ESPECIALLY NOT TO THE OUTPUT. The capacitor on the
inverting input will cause peaking or oscillations. If you
need to limit the bandwidth of a current feedback amplifier,
use a resistor and capacitor at the noninverting input (R1
& C1). This technique will also cancel (to a degree) the
peaking caused by stray capacitance at the inverting input.
Unfortunately, this will not limit the output noise the way
it does for the op amp.
LT1223 TA04
+
–
IN
V
OUT
V
LT1223
R
F
5k
R
G
LT1223 TA05
+
–
IN
V
OUT
V
LT1223
R
F
R
G
R1
R1 = 300
C1 = 100pF
BW = 5MHz
C1
LT1223 TA06
+
–
IN
V
OUT
V
LT1223
R
F
1k
C
I
OUT
V
IN
V
1
sC R
=
I
I
R
Current Feedback Amplifier Integrator
Since we remember that the inverting input wants to see
a resistor, we can add one to the standard integrator
circuit. This generates a new summing node where we can
apply capacitive feedback. The LT1223 integrator has
excellent large signal capability and accurate phase shift at
high frequencies.
相關PDF資料 |
PDF描述 |
|---|---|
| LT1223CS8 | 100MHz Current Feedback Amplifier |
| LT1223CJ8 | 100MHz Current Feedback Amplifier |
| LT1223MJ8 | 100MHz Current Feedback Amplifier |
| LT1224CS8 | Very High Speed Operational Amplifier |
| LT1224CN8 | Very High Speed Operational Amplifier |
相關代理商/技術參數 |
參數描述 |
|---|---|
| LT1223MJ8 | 制造商:LINER 制造商全稱:Linear Technology 功能描述:100MHz Current Feedback Amplifier |
| LT1224 | 制造商:LINER 制造商全稱:Linear Technology 功能描述:Very High Speed Operational Amplifier |
| LT1224C | 制造商:LINER 制造商全稱:Linear Technology 功能描述:Very High Speed Operational Amplifier |
| LT1224CN8 | 功能描述:IC OP-AMP HI-SPEED 45MHZ 8-DIP RoHS:否 類別:集成電路 (IC) >> Linear - Amplifiers - Instrumentation 系列:- 產品培訓模塊:Lead (SnPb) Finish for COTS Obsolescence Mitigation Program 標準包裝:1 系列:- 放大器類型:電流檢測 電路數:1 輸出類型:- 轉換速率:- 增益帶寬積:125kHz -3db帶寬:- 電流 - 輸入偏壓:- 電壓 - 輸入偏移:100µV 電流 - 電源:1.1µA 電流 - 輸出 / 通道:- 電壓 - 電源，單路/雙路(±):- 工作溫度:-40°C ~ 85°C 安裝類型:表面貼裝 封裝/外殼:4-WFBGA，CSPBGA 供應商設備封裝:4-UCSP（2x2） 包裝:剪切帶 (CT) 其它名稱:MAX9634WERS+TCT |
| LT1224CN8#PBF | 功能描述:IC OP-AMP HI-SPEED 45MHZ 8-DIP RoHS:是 類別:集成電路 (IC) >> Linear - Amplifiers - Instrumentation 系列:- 產品培訓模塊:Lead (SnPb) Finish for COTS Obsolescence Mitigation Program 標準包裝:1 系列:- 放大器類型:電流檢測 電路數:1 輸出類型:- 轉換速率:- 增益帶寬積:125kHz -3db帶寬:- 電流 - 輸入偏壓:- 電壓 - 輸入偏移:100µV 電流 - 電源:1.1µA 電流 - 輸出 / 通道:- 電壓 - 電源，單路/雙路(±):- 工作溫度:-40°C ~ 85°C 安裝類型:表面貼裝 封裝/外殼:4-WFBGA，CSPBGA 供應商設備封裝:4-UCSP（2x2） 包裝:剪切帶 (CT) 其它名稱:MAX9634WERS+TCT |
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