參數(shù)資料
型號： LT1223CS8#PBF
廠商： Linear Technology
文件頁數(shù)： 14/16頁
文件大小： 0K
描述： IC CURRNT FEEDBK AMP100MHZ 8SOIC
標準包裝： 100
放大器類型： 電流反饋
電路數(shù)： 1
轉換速率： 1300 V/µs
-3db帶寬： 100MHz
電流 - 輸入偏壓： 1µA
電壓 - 輸入偏移： 1000µV
電流 - 電源： 6mA
電流 - 輸出 / 通道： 60mA
電壓 - 電源，單路/雙路(±)： 8 V ~ 36 V，±4 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）
供應商設備封裝： 8-SO
包裝： 管件
產(chǎn)品目錄頁面： 1318 (CN2011-ZH PDF)
LT1223
7
1223fb
APPLICATIO S I FOR ATIO
WU
U
TYPICAL PERFOR A CE CHARACTERISTICS
UW
does in a voltage feedback op amp, the closed-loop
bandwidth does not change. This is because the equiva-
lent gain bandwidth product of the current feedback am-
plifier is set by the Thevenin equivalent resistance at the
inverting input and the internal compensation capacitor.
By keeping RF constant and changing the gain with RG, the
Thevenin resistance changes by the same amount as the
change in gain. As a result, the net closed-loop bandwidth
of the LT1223 remains the same for various closed-loop
gains.
Voltage Gain and Phase vs
Total Harmonic Distortion vs
2nd and 3rd Harmonic
Frequency
Distortion vs Frequency
Noninverting Amplifier Settling
Inverting Amplifier Settling
Time to 10mV vs Output Step
Time to 1mV vs Output Step
Time vs Output Step
Current Feedback Basics
The small-signal bandwidth of the LT1223, like all current
feedback amplifiers, isn’t a straight inverse function of the
closed-loop gain. This is because the feedback resistors
determine the amount of current driving the amplifier’s
internal compensation capacitor. In fact, the amplifier’s
feedback resistor (RF) from output to inverting input
works with internal junction capacitances of the LT1223 to
set the closed-loop bandwidth.
Even though the gain set resistor (RG) from inverting input
to ground works with RF to set the voltage gain just like it
FREQUENCY (Hz)
1M
–30
VOLTAGE
GAIN
(dB)
–15
5
20
10M
100M
1G
LT1223 TPC20
R
1k
L
GAIN
–25
–20
–10
–5
0
10
15
PHASE
SHIFT
(DEGREES)
–225
–90
90
225
–180
–135
–45
0
45
135
180
PHASE
≥
R = 100
L
R
1k
L ≥
R = 100
L
V =
15V
RF = RG = 1k
S
±
FREQUENCY (Hz)
TOTAL
HARMONIC
DISTORTION
(%)
0.01
0.1
10
1k
10k
100k
LT1223 TPC21
0.001
100
THD
V =
15V
V = 7V
R = 400
RF = RG =1k
S
O
L
±
RMS
FREQUENCY (MHz)
1
–70
DISTORTION
(dBc)
–20
10
100
LT1223 TPC22
–60
–50
–40
–30
2ND
3RD
V =
15V
V = 2VP-P
R = 100
RF = 1k
A = 10dB
S
±
O
L
V
SETTLING TIME (ns)
0
–10
OUTPUT
STEP
(V)
–4
10
LT1223 TPC23
20
40
60
80
100
–8
–6
–2
0
2
4
6
8
TO 10mV
V
S
L
±
A = +1
RF = 1k
V =
15V
R = 1k
SETTLING TIME ( s)
0
–10
OUTPUT
STEP
(V)
–4
10
LT1223 TPC24
12
–8
–6
–2
0
2
4
6
8
TO 1mV
TO 1mV
A = +1
R = 1k
V =
15V
R = 1k
F
S
±
V
L
SETTLING TIME (ns)
0
–10
OUTPUT
STEP
(V)
–4
10
LT1223 TPC25
100
–8
–6
–2
0
2
4
6
8
TO 1mV
TO 10mV
A = –1
R = 1k
V =
15V
R = 1k
F
S
±
V
20
40
60
80
L
TO 10mV
TO 1mV
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