Quad-Output LNA with AGC for

Cable TV Applications

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3

AC ELECTRICAL CHARACTERISTICS

PARAMETER

CONDITIONS

MIN

TYP

MAX

UNITS

Frequency Range

Gain specification is met across the frequency band

50

878

MHz

Differential output load, maximum gain (Note 2)

4.0

6.8

9.3

Voltage Gain

-27.6

-15.7

dB

Gain Flatness

50MHz to 878MHz

±0.4

dB

Noise Figure

Worst case across band, 75

Ω source, at maximum gain

8.4

9.9

dB

Maximum gain

-1.1

Input P1dB Compression Point

10dB gain reduction

+1.3

dBm

14.4

Input 3rd-Order Intercept Point

(IIP3) (Note 3)

15.6

dBm

+45.9

Input 2nd-Order Intercept Point

(IIP2) (Note 3)

+29.5

dBm

Input Return Loss

Any gain setting

9

dB

Output Return Loss

75

Ω differential output load

8

dB

OUT_ to RFIN Isolation

65

dB

RFIN to OUT_ Shutdown Isolation

40

dB

Output-to-Output Isolation

Between any two outputs

45

dB

Power-Detector Operating Range

(per Channel)

-3

+17

dBmV

AGC Attack Range (per Channel)

Ω to 12kΩ, flat input of 130 channel

loading (Notes 4, 5)

-3

+6

dBmV

AGC Attack Accuracy

(per Channel)

130 channel loading (Notes 2, 4)

-2.2

+2.2

dBmV

Attack Point Variation

Any one output in shutdown mode (Note 4)

-0.5

+0.5

dBm

AGC Attack Slope

reaching AGC attack point (Notes 2, 4)

-2

+2

dB

Note 1: Guaranteed by design and characterization.

Note 2: Guaranteed by production test.

Note 4: PDOUT connected to PDAGC and AGC_.