LTC6421-20

4

642120fa

AC ELECTRICAL CHARACTERISTICS

SYMBOL

PARAMETER

CONDITIONS

MIN

TYP

MAX

UNITS

ΔG

Gain Matching

f = 100MHz (Note 9)

l

±0.1

±0.25

dB

ΔP

Phase Matching

f = 100MHz

±0.2

deg

Channel Separation (Note 8)

f = 100MHz

80

dB

–3dBBW

–3dB Bandwidth

1.3

GHz

0.5dBBW

Bandwidth for 0.5dB Flatness

250

MHz

0.1dBBW

Bandwidth for 0.1dB Flatness

130

MHz

NF

Noise Figure

6.2

dB

Input Referred Voltage Noise Density

Includes Resistors (Short Inputs), f = 100MHz

2.2

nV/√Hz

Output Referred Voltage Noise Density Includes Resistors (Short Inputs), f = 100MHz

22

nV/√Hz

1/f

1/f Noise Corner

12.5

kHz

SR

Slew Rate

Differential (Note 6)

4500

V/μs

1% Settling Time

2

ns

Overdrive Recovery Time

7

ns

1dB Compression Point

18

dBm

Turn-On Time

+OUT, –OUT Within 10% of Final Values

80

ns

Turn-Off Time

150

ns

Output (Note 6)

15

MHz

3rd Order Intermodulation Distortion

f = 100MHz (1MHz Spacing),

–76

dBc

3rd Order Output Intercept

f = 100MHz (Note 7)

42

dBc

3rd Order Input Intercept

22

16

dBc

dBc

2nd Order Harmonic Distortion

–74

dBc

3rd Order Harmonic Distortion

–78

dBc

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 LTC6421C and LTC6421I are guaranteed functional over the

operating temperature range of –40°C to 85°C.

Note 4: The LTC6421C is guaranteed to meet specified performance from

0°C to 70°C. It is designed, characterized and expected to meet specified

performance from –40°C to 85°C but is not tested or QA sampled at these

temperatures. The LTC6421I is guaranteed to meet specified performance

from –40°C to 85°C.

Note 5: Input and output baluns used. See Test Circuit A.

Note 7: Since the LTC6421-20 is a feedback amplifier 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

LTC6421-20 with amplifiers that require 50Ω output load, the output

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.

The

noted.