LT5578 datasheet(3/16 Pages) LINER

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LT5578

5578f

AC ELECTRICAL CHARACTERISTICS V

CC = 3.3V, TA = 25°C, Test circuits are shown in Figure 1. (Notes 2, 3)

PARAMETER

CONDITIONS

MIN

TYP

MAX

UNITS

IF Input Return Loss

ZO = 50Ω, External Match

LO Input Return Loss

ZO = 50Ω, External Match

RF Output Return Loss

ZO = 50Ω, External Match

>10

LO Input Power

–5 to 2

dBm

VCC = 3.3V, TA = 25°C, PIF = –5dBm (–5dBm/tone for 2-tone tests, Δf = 1MHz), PLO = –1dBm, unless otherwise noted.

Low side LO for 900MHz. High side LO for 740MHz and 1950MHz. (Notes 2, 3, 4)

PARAMETER

CONDITIONS

MIN

TYP

MAX

UNITS

Conversion Gain

fRF = 740MHz, fIF = 140MHz

fRF = 900MHz, fIF = 140MHz

fRF = 1950MHz, fIF = 240MHz

0.8

1.4

–0.7

Conversion Gain vs Temperature

(TA = –40°C to 85°C)

fRF = 740MHz, fIF = 140MHz

fRF = 900MHz, fIF = 140MHz

fRF = 1950MHz, fIF = 240MHz

–0.020

–0.018

–0.021

dB/°C

Output 3rd Order Intercept

fRF = 740MHz, fIF = 140MHz

fRF = 900MHz, fIF = 140MHz

fRF = 1950MHz, fIF = 240MHz

26.5

27.0

24.3

dBm

Output 2nd Order Intercept (LO ±2IF)

fRF = 740MHz, fIF = 140MHz

fRF = 900MHz, fIF = 140MHz

fRF = 1950MHz, fIF = 240MHz

dBm

Single Sideband Noise Figure

fRF = 740MHz, fIF = 140MHz

fRF = 900MHz, fIF = 140MHz

fRF = 1950MHz, fIF = 240MHz

8.6

10.5

Output Noise: POUT = –5dBm

fRF = 740MHz, fIF = 140MHz

fRF = 900MHz, fIF = 140MHz

fRF = 1950MHz, fIF = 240MHz

–161

–160.5

–158

dBm/Hz

Output Noise: POUT = 0dBm

fRF = 740MHz, fIF = 140MHz

fRF = 900MHz, fIF = 140MHz

fRF = 1950MHz, fIF = 240MHz

–158

–157.5

–154

dBm/Hz

Output Noise: POUT = 5dBm

fRF = 740MHz, fIF = 140MHz

fRF = 900MHz, fIF = 140MHz

fRF = 1950MHz, fIF = 240MHz

–154

–153

–149.5

dBm/Hz

Output 1dB Compression

fRF = 740MHz, fIF = 140MHz

fRF = 900MHz, fIF = 140MHz

fRF = 1950MHz, fIF = 240MHz

11.6

dBm

IF to LO Isolation

fRF = 740MHz, fIF = 140MHz

fRF = 900MHz, fIF = 140MHz

fRF = 1950MHz, fIF = 240MHz

LO to IF Leakage

fRF = 740MHz, fIF = 140MHz

fRF = 900MHz, fIF = 140MHz

fRF = 1950MHz, fIF = 240MHz

–31

–40

–22

dBm

LO to RF Leakage

fRF = 740MHz, fIF = 140MHz

fRF = 900MHz, fIF = 140MHz

fRF = 1950MHz, fIF = 240MHz

–43

–46

dBm

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: Each set of frequency conditions requires appropriate matching

(see Figure 1).

Note 3: The LT5578 is guaranteed functional over the operating

temperature range from –40°C to 85°C.

Note 4: SSB noise ﬁgure measurements performed with a small-signal

noise source and bandpass ﬁlter on LO signal generator. No other IF signal

applied.

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