LT1251 데이터 시트보기 (PDF) - Linear Technology
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LT1251 Datasheet PDF : 24 Pages
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TYPICAL PERFORMANCE CHARACTERISTICS
LT1251/LT1256
LT1251
Gain vs Control Voltage
1.0
0.8
IN2
0.6
VFS = 2.5V
0.4
IN1
0.2
0
0
0.5 1.0 1.5 2.0 2.5
CONTROL VOLTAGE (V)
1251/56 G01
LT1251/LT1256
Control Path Bandwidth
10
8
VOLTAGE DRIVE VC
VS = ±5V
6
4
2
0
PIN 4 NOT IN SOCKET
–2
–4
–6
–8
–10
10k
100k
1M
10M
FREQUENCY (Hz)
100M
1251/56 G04
THD Plus Noise vs Frequency
10
VS
=
CC
± 5V,
VIN
=
1VRMS
AV = 1, RF = 1.5k, VFS = 2.5V
1
VC
=
CC
10%
0.1
0.01
VC
=
CC
50%
0.001
10
VC
=
CC
100%
100
1k
10k
FREQUENCY (Hz)
100k
1251/56 G08
LT1256
Gain vs Control Voltage
1.0
0.8
IN2
0.6
VFS = 2.5V
0.4
IN1
0.2
0
0
0.5 1.0 1.5 2.0 2.5
CONTROL VOLTAGE (V)
1251/56 G02
LT1251/LT1256
Control Path Bandwidth
10
8
VOLTAGE DRIVE RC
VC = GND
6 VS = ±5V
4
2
0
–2
–4
–6
–8
–10
10k
100k
1M
10M
FREQUENCY (Hz)
100M
1251/56 G05
2nd and 3rd Harmonic Distortion
vs Frequency
–20
VS
=
CC
± 5V
AV = 1
–30 RF = 1.5k
RL = 1k
VO = 2VP-P
–40 VC = VFS = 2.5V
– 50
2ND
3RD
– 60
–70
1
10
FREQUENCY (MHz)
100
1251/56 G09
Spot Input Noise Voltage and
Current vs Frequency
100
–in
10
en
+in
1
10
100
1k
10k
FREQUENCY (Hz)
1251/56 G06
Undistorted Output Voltage
vs Frequency
8
AV = 10
7
6
AV = 1
5
4
3 VS = ±5V
RL = 1k
2 RF = 1.5k
VC = VFS = 2.5V
1
100k
1M
10M
FREQUENCY (Hz)
100M
1251/56 G07
3rd Order Intercept vs Frequency
50
VS
=
CC
±15V
45
AV = 1
RF = 1.5k
40
RL = 100Ω
VC = VFS = 2.5V
35
30
25
20
15
10
0
5 10 15 20 25 30
FREQUENCY (MHz)
1251/56 G10
5
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