LTC6406 datasheet(5/16 Pages) LINER

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LTC6401-20

640120f

AC ELECTRICAL CHARACTERISTICS

FREQUENCY (MHz)

100

–100

–200

–300

–400

1.5

1.2

0.9

0.6

0.3

200

400

600

800

1000

640120 G03

PHASE

GROUP DELAY

TEST CIRCUIT B

FREQUENCY (MHz)

100

1000

1.0

0.8

–0.8

0.6

–0.6

0.4

–0.4

0.2

–0.2

–1.0

640120 G02

TEST CIRCUIT B

FREQUENCY (MHz)

100

1000

3000

640120 G01

TEST CIRCUIT B

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 LTC6401C and LTC6401I are guaranteed functional over the

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

Note 4: The LTC6401C 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 LTC6401I is guaranteed to meet speciﬁed performance

from –40°C to 85°C.

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

Note 6: Measured using Test Circuit B.

Note 7: Since the LTC6401-20 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

LTC6401-20 with ampliﬁers that require 50Ω output load, the LTC6401-20

output voltage swing driving a given RL is converted to OIP3 and P1dB as

if it were driving a 50Ω load. Using this modiﬁed convention, 2VP-P is by

deﬁnition equal to 10dBm, regardless of the actual RL.

TYPICAL PERFORMANCE CHARACTERISTICS

Frequency Response

Gain 0.1dB Flatness

S21 Phase and Group Delay vs

Frequency

SYMBOL

PARAMETER

CONDITIONS

MIN

TYP

MAX

UNITS

IMD3,140M

Third-Order Intermodulation

(f1 = 139.5MHz f2 = 140.5MHz)

2VP-P,OUT Composite, RL = 400Ω

–71

dBc

2VP-P,OUT Composite, No RL

–74

dBc

2VP-P,OUTFILT Composite, No RL

–72

dBc

OIP3,140M

Third-Order Output Intercept Point

(f1 = 139.5MHz f2 = 140.5MHz)

2VP-P,OUT Composite, No RL (Note 7)

dBm

P1dB,140M

1dB Compression Point

RL = 375Ω (Notes 5, 7)

dBm

NF140M

Noise Figure

RL = 375Ω (Note 5)

6.4

eIN,140M

Input Referred Voltage Noise Density

Includes Resistors (Short Inputs)

2.1

nV/√⎯H⎯z

eON,140M

Output Referred Voltage Noise Density Includes Resistors (Short Inputs)

nV/√⎯H⎯z

IMD3,130M/150M

Third-Order Intermodulation

(f1 = 130MHz f2 = 150MHz) Measure

at 170MHz

2VP-P,OUT Composite, RL = 375Ω (Note 5)

–61

–69

dBc

Speciﬁcations are at TA = 25°C. V+ = 3V, V– = 0V, +IN and –IN

ﬂoating, VOCM = 1.25V, ⎯E⎯N⎯A⎯B⎯L⎯E = 0V, No RL unless otherwise noted.

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