LTC6409 Linear Technology, LTC6409 Datasheet - Page 8

• Manufacturer Part Number: LTC6409
• Description: 10GHz GBW - 1.1nV/Hz Differential Amplifier/ADC Driver
• Manufacturer: Linear Technology

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pin FuncTions
LTC6409
Typical perForMance characTerisTics
+IN, –IN (Pins 2, 6): Non-Inverting and Inverting Input Pins.
SHDN (Pin 3): When SHDN is floating or directly tied to
V
When the SHDN pin is connected to V
and draws approximately 100µA of supply current.
V
Power Supply Pins. Similar pins should be connected to
the same voltage.
8
+
+
–100
–110
–120
–100
–110
–120
, the LTC6409 is in the normal (active) operating mode.
, V
–50
–60
–70
–80
–90
–50
–60
–70
–80
–90
–
10
1
Harmonic Distortion vs Frequency
Intermodulation Distortion vs
Frequency
V
V
R
R
V
SINGLE-ENDED INPUT
V
V
R
R
2 TONES, 200kHz TONE
SPACING, 2V
DIFFERENTIAL INPUTS
(Pins 4, 9 and Pins 8, 10): Positive and Negative
S
OCM
OUTDIFF
LOAD
I
S
OCM
LOAD
I
= R
= R
= 5V
= 5V
= V
F
= V
F
= 400
= 400
= 150
= 150
ICM
= 2V
ICM
FREQUENCY (MHz)
10
P-P
FREQUENCY (MHz)
= 1.25V
= 1.25V
P-P
HD2
HD3
COMPOSITE
100
100
6409 G22
6409 G25
1000
1000
–
, the part is disabled
–100
–110
–100
–110
–30
–40
–50
–60
–70
–80
–90
–30
–40
–50
–60
–70
–80
–90
0.5
0.5
Harmonic Distortion vs Output
Common Mode Voltage
Intermodulation Distortion vs
Output Common Mode Voltage
V
f
R
R
2 TONES, 200kHz TONE
SPACING, 2V
DIFFERENTIAL INPUTS
IN
S
LOAD
I
= R
OUTPUT COMMON MODE VOLTAGE (V)
OUTPUT COMMON MODE VOLTAGE (V)
= 5V
= 100MHz
1
1
F
= 400
= 150
V
f
R
R
V
SINGLE-ENDED INPUT
IN
1.5
S
LOAD
I
OUTDIFF
1.5
P-P
V
V
R
R
V
SINGLE-ENDED INPUT
= R
S
OCM
= 5V
= 100MHz
OUTDIFF
LOAD
I
= R
= 5V
COMPOSITE
F
= 400
= 150
= V
F
= 400
= 2V
= 150
2
HD2
2
HD3
ICM
= 2V
V
The voltage on this pin sets the output common mode
voltage level. If left floating, an internal resistor divider
develops a default voltage of 1.25V with a 5V supply.
+OUT, –OUT (Pins 7, 1): Differential Output Pins.
Exposed Pad (Pin 11): Tie the bottom pad to V
supplies are used, DO NOT tie the pad to ground.
OCM
P-P
= 1.25V
P-P
2.5
2.5
(Pin 5): Output Common Mode Reference Voltage.
3
3
6409 G26
6409 G23
3.5
3.5
–100
–110
–120
–100
–110
–120
–80
–90
(0.4V
–80
–90
(0.8V
–4
2
Intermodulation Distortion vs
Input Amplitude
Harmonic Distortion vs Input
Amplitude
P-P
P-P
V
V
f
V
V
f
R
R
2 TONES, 200kHz TONE SPACING
DIFFERENTIAL INPUTS
IN
IN
S
OCM
S
OCM
LOAD
I
)
)
= R
= 5V
= 100MHz
= 5V
= 100MHz
–2
= V
= V
F
= 400
= 150
ICM
INPUT AMPLITUDE (dBm)
ICM
INPUT AMPLITUDE (dBm)
4
0
= 1.25V
= 1.25V
2
6
R
R
SINGLE-ENDED INPUT
LOAD
I
= R
4
F
= 400
= 150
6
HD2
HD3
8
–
. If split
8
6409 G24
6409 G27
(2V
(2V
6409fa
10
10
P-P
P-P
)
)