LT5575 Datasheet, PDF(4/16 Page) Linear Technology – 800MHz to 2.7GHz High Linearity Direct Conversion Quadrature Demodulator

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LT5575 Datasheet, PDF (4/16 Pages) Linear Technology – 800MHz to 2.7GHz High Linearity Direct Conversion Quadrature Demodulator

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LT5575

AC ELECTRICAL CHARACTERISTICS VCC = +5V, EN = High, TA = 25Â°C, PRF = â10dBm (â10dBm/tone for

2-tone IIP2 and IIP3 tests), Baseband Frequency = 1MHz (0.9MHz and 1.1MHz for 2-tone tests), PLO = 0dBm, unless otherwise noted.

(Notes 2, 3, 6)

PARAMETER

RF to LO Isolation

CONDITIONS

RF = 900MHz (Note 5)

RF = 1900MHz

RF = 2100MHz

RF = 2500MHz

MIN TYP MAX UNITS

59.7

dBc

57.1

dBc

59.5

dBc

53.1

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: Tests are performed as shown in the conï¬guration of Figure 1.

Note 3: Speciï¬cations over the â40ËC to 85ËC temperature range are

assured by design, characterization and correlation with statistical

process control.

Note 4: DSB Noise Figure is measured with a small-signal noise source

at the baseband frequency of 15MHz without any ï¬ltering on the RF input

and no other RF signal applied.

Note 5: 900MHz performance is measured with external RF and LO

matching. The optional output capacitors C1-C4 (10pF) are also used for

best IIP2 performance.

Note 6: For these measurements, the complementary outputs (e.g., IOUT+,

IOUTâ) were combined using a 180Ë phase shift combiner.

Note 7: Large-signal noise ï¬gure is measured at an output frequency of

198.7MHz with RF input signal at fLO â1MHz. Both RF and LO input signals

are appropriately bandpass ï¬ltered, as well as baseband output.

5575f

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