ltc6420 Linear Technology Corporation, ltc6420 Datasheet - Page 4

• Manufacturer Part Number: ltc6420
• Description: Dual Matched 1.8ghz Differential Ampli?ers/adc Drivers
• Manufacturer: Linear Technology Corporation

AC ELECTRICAL CHARACTERISTICS
LTC6420-20
temperature range, otherwise specifi cations are at T
SYMBOL
ΔG
ΔP
–3dBBW
0.5dBBW
0.1dBBW
NF
e
e
1/f
SR
t
t
P
t
t
–3dBBW
IMD3
OIP3
IIP3
HD
HD
Note 1: Stresses beyond those listed under Absolute Maximum Ratings
may cause permanent damage to the device. Exposure to any Absolute
Maximum Rating condition for extended periods may affect device
reliability and lifetime.
Note 2: Input pins (+IN, –IN) are protected by steering diodes to either
supply. If the inputs go beyond either supply rail, the input current should
be limited to less than 10mA.
Note 3: The LTC6420C and LTC6420I are guaranteed functional over the
operating temperature range of –40°C to 85°C.
Note 4: The LTC6420C is guaranteed to meet specifi ed performance from
0°C to 70°C. It is designed, characterized and expected to meet specifi ed
performance from –40°C to 85°C but is not tested or QA sampled at these
temperatures. The LTC6420I is guaranteed to meet specifi ed performance
from –40°C to 85°C.
4
S1%
OVDR
ON
OFF
IN
ON
1dB
2
3
VOCM
PARAMETER
Gain Matching
Phase Matching
Channel Separation (Note 8)
–3dB Bandwidth
Bandwidth for 0.5dB Flatness
Bandwidth for 0.1dB Flatness
Noise Figure
Input Referred Voltage Noise Density
Output Referred Voltage Noise Density Includes Resistors (Short Inputs), f = 100MHz
1/f Noise Corner
Slew Rate
1% Settling Time
Overdrive Recovery Time
1dB Compression Point
Turn-On Time
Turn-Off Time
V
3rd Order Intermodulation Distortion
3rd Order Output Intercept
3rd Order Input Intercept
2nd Order Harmonic Distortion
3rd Order Harmonic Distortion
OCM
Pin Small Signal –3dB BW
CONDITIONS
f = 100MHz (Note 9)
f = 100MHz
f = 100MHz
200mV
200mV
200mV
R
Includes Resistors (Short Inputs), f = 100MHz
Differential (Note 6)
2V
1.9V
R
+OUT, –OUT Within 10% of Final Values
I
0.1V
Output (Note 6)
f = 100MHz (1MHz Spacing)
V
f = 100MHz (Note 7)
f = 100MHz (Z
f = 100MHz (Z
f = 100MHz; V
f = 100MHz; V
CC
OUT
L
L
P-P ,OUT
A
= 375Ω (Note 5), f = 100MHz
= 375Ω (Notes 5, 7), f = 100MHz
Falls to 10% of Nominal
= 25°C. V
P-P ,OUT
P-P
= 2V
P-P ,OUT
P-P ,OUT
P-P ,OUT
at V
(Note 6)
P-P
(Note 6): Single Ended
OCM
Composite
(Note 6)
(Note 6)
(Note 6)
OUT
OUT
IN
IN
+
, Measured Single-Ended at
= 50Ω)
= 200Ω)
= 3V, V
= 2V
= 2V
The
P-P
P-P
Note 5: Input and output baluns used. See Test Circuit A.
Note 6: Measured using Test Circuit B. R
Note 7: Since the LTC6420-20 is a feedback amplifi er with low output
impedance, a resistive load is not required when driving an AD converter.
Therefore, typical output power is very small. In order to compare the
LTC6420-20 with amplifi ers that require 50Ω output load, the output
voltage swing driving a given R
driving a 50Ω load. Using this modifi ed convention, 2V
equal to 10dBm, regardless of actual R
Note 8: Channel separation (the inverse of crosstalk) is measured by
driving a signal into one input, while terminating the other input. Channel
separation is the ratio of the resulting output signal at the driven channel
to the channel that is not driven.
Note 9: Not production tested. Guaranteed by design and by correlation to
production tested parameters.
l
–
= 0V, V
denotes the specifi cations which apply over the full operating
OCM
= 1.25V, ENABLE = 0V, No R
l
L
MIN
is converted to OIP
L
.
L
= 87.5Ω on each output.
4500
±0.1
±0.1
TYP
190
–84
–80
–88
L
1.8
0.7
0.3
6.2
2.2
0.8
80
22
10
18
82
15
46
26
20
4
unless otherwise noted.
3
and P
P-P
±0.25
MAX
is by defi nition
1dB
as if it were
nV/√Hz
nV/√Hz
UNITS
642020f
dBm
dBm
dBm
dBm
V/μs
MHz
GHz
GHz
GHz
dBc
dBc
dBc
deg
kHz
dB
dB
dB
ns
ns
ns
ns