LT1251/LT1256
TYPICAL PERFORMANCE CHARACTERISTICS
U W
Bandwidth vs Feedback
Bandwidth vs Feedback
Voltage Gain and Phase
vs Frequency
Resistance, AV = 1, RL = 100Ω
Resistance, AV = 1, RL = 1k
5
4
45
70
60
50
40
30
20
10
70
60
50
40
30
20
10
PHASE
PEAKING ≤ 0.5dB
PEAKING ≤ 5.0dB
PEAKING ≤ 0.5dB
PEAKING ≤ 5.0dB
0
3
–45
–90
–135
–180
–225
–270
2
V
= ±15V
1
S
V
= ±15V
S
GAIN
0
V
= 5V
V
= 5V
S
S
–1
–2
–3
–4
–5
V
R
R
= ±5V
= 1.3k
= 100Ω
V
S
= ±5V
S
F
L
V
= ±5V
1.2
S
100k
1M
10M
100M
0.6
1.0
1.2
1.4
1.6
1.8
0.6
1.0
1.4
1.6
1.8
0.8
0.8
FEEDBACK RESISTANCE (kΩ)
FEEDBACK RESISTANCE (kΩ)
FREQUENCY (Hz)
1251/56 G13
1251/56 G11
1251/56 G12
Bandwidth vs Feedback
Resistance, AV = 10, RL = 100Ω
Off-Channel Isolation
vs Frequency
Bandwidth vs Feedback
Resistance, AV = 10, RL = 1k
60
50
40
30
20
10
60
50
40
30
20
10
0
–10
–20
–30
–40
–50
–60
–70
–80
–90
–100
PEAKING ≤ 0.5dB
PEAKING ≤ 5.0dB
PEAKING ≤ 0.5dB
PEAKING ≤ 5.0dB
V
V
V
= ±5V
S
= 2.5V
FS
= 0V
= 100Ω
C
R
L
V
= ±15V
R = 1.5k
S
F
A
= 10
V
V
= ±15V
S
V
= 5V
S
V
= 5V
S
A
= 1
V
V
= ±5V
S
V
= ±5V
S
0.4
0.8
1.0
1.2
1.4
1.6
0.4
0.8
1.0
1.2
1.4
1.6
10k
100k
1M
FREQUENCY (Hz)
10M
100M
0.6
0.6
FEEDBACK RESISTANCE (kΩ)
FEEDBACK RESISTANCE (kΩ)
1251/56 G16
1251/56 G14
1251/56 G15
Bandwidth vs Feedback
Resistance, AV = 100, RL = 100Ω
Bandwidth vs Feedback
Resistance, AV = 100, RL = 1k
–3dB Bandwidth vs
Control Voltage
40
35
30
25
20
15
10
10
9
10
9
V
R
V
= ±5V
NO PEAKING
NO PEAKING
S
L
= 100Ω
= 2.5V
V
= ±15V
V
= ±15V
S
FS
S
8
8
R
= 1.3k
F
7
7
V
= ±5V
= 5V
S
V
= ±5V
= 5V
S
6
6
5
5
V
S
V
S
4
4
3
3
2
2
0
0.5
1.0
1.5
2.0
2.5
1.0 1.2 1.4
1.0 1.2 1.4
0.2 0.4 0.6 0.8
1.6 1.8 2.0
0.2 0.4 0.6 0.8
1.6 1.8 2.0
CONTROL VOLTAGE (V)
FEEDBACK RESISTANCE (kΩ)
FEEDBACK RESISTANCE (kΩ)
1251/56 G19
1251/56 G17
1251/56 G18
6
Linear [ Linear ]
