Datasheet

LTC6405
8
6405fb
For more information www.linear.com/6405
Frequency Response
vs Closed Loop Gain
Frequency Response
vs Load Capacitance
Frequency Response vs Input
Common Mode Voltage
typical perForMance characteristics
A
V
= 10
A
V
= 5
A
V
= 20
A
V
= 100
A
V
= 2
A
V
= 1
FREQUENCY (MHz)
6405 G16
GAIN (dB)
V
S
= 5V
V
OCM
= V
ICM
= 2.5V
R
LOAD
= 400Ω
50
40
30
20
10
0
–50
–40
–30
–20
–10
1 10010 1000 2000
A
V
(V/V) C
F
(pF)R
I
(Ω) R
F
(Ω)
1
2
5
10
20
100
200
200
200
200
200
200
200
400
1k
2k
4k
20k
1.8
1.5
0.6
0.2
0
0
FREQUENCY (MHz)
6405 G17
GAIN (dB)
V
S
= 5V
V
OCM
= V
ICM
= 2.5V
R
LOAD
= 400Ω
R
I
= R
F
= 200Ω, C
F
= 1.8pF
CAPACITOR VALUES ARE FROM EACH
OUTPUT TO GROUND.
NO SERIES RESISTORS ARE USED.
30
20
10
0
–60
–50
–40
–30
–20
–10
C
L
= 0pF
C
L
= 2pF
C
L
= 3pF
C
L
= 4.7pF
C
L
= 10pF
1 10010 1000 2000
FREQUENCY (MHz)
6405 G18
GAIN (dB)
V
S
= 5V
V
OCM
= 2.5V
R
LOAD
= 400Ω
R
I
= R
F
= 200Ω, C
F
= 1.8pF
10
5
0
–5
–40
–35
–30
–20
–10
–25
–15
V
ICM
= 0V
V
ICM
= 0.5V
V
ICM
= 1.25V
V
ICM
= 2.5V
V
ICM
= 4V
V
ICM
= 5V
1 10010 1000 2000
Small Signal Step Response Large Signal Step Response
Overdriven Output
Transient Response
6405 G13
10ns/DIV
20mV/DIV
+OUT
–OUT
V
S
= 5V
V
OCM
= V
ICM
= 2.5V
R
LOAD
= 400Ω
R
I
= R
F
= 200Ω
C
F
= 1.8pF
C
L
= 0pF
6405 G14
10ns/DIV
V
S
= 5V
R
LOAD
= 400Ω
V
IN
= 2V
P-P
, DIFFERENTIAL
+OUT
–OUT
0.2V/DIV
100ns/DIV
VOLTAGE (V)
3.0
3.5
4.0
2.5
2.0
0.5
0
1.5
4.5
1.0
6405 G15
V
S
= 5V
V
OCM
= 2.5V
R
LOAD
= 400Ω TO GROUND PER OUTPUT
–OUT
+OUT
(QFN Package)