Data Sheet

ADRF5702

Silicon Digital Attenuator, 0.125dB LSB, 8-Bit, 50MHz to 20GHz

Rev. A

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FEATURES

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Frequency range: 50MHz to 20GHz

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Attenuation range: 31.875dB with 0.125dB step size

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Low insertion loss

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1.4dB typical up to 6GHz (5V supply)

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1.8dB typical up to 12GHz (5V supply)

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2.6dB typical up to 20GHz (5V supply)

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Attenuation accuracy: −(0.1 + 2.0% of attenuation state) typical

up to 20GHz

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Step error: −0.30dB typical up to 20GHz (5V supply)

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High linearity

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Input P0.1dB

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Attenuation state < 8dB: 32dBm typical (5V supply)

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Attenuation state ≥ 8dB: 29dBm typical (5V supply)

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Input IP3

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Attenuation state < 16dB): 55dBm typical (5V supply)

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Attenuation state ≥ 16dB): 50dBm typical (5V supply)

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High RF power handling

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27dBm average (ATTIN)

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32dBm peak (5V supply, attenuation state < 8dB)

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29dBm peak (5V supply, attenuation state ≥ 8dB)

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27dBm hot switching

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RF amplitude settling time (50% triggered control to 0.05dB of

final RF output): 140ns

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Consistent return loss at all attenuation states

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Single-supply operation: 5V or 3.3V

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No low frequency spurs, and no internal voltage generation

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Serial and parallel mode control, CMOS/LVTTL compatible

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24-terminal, 4.0mm × 4.0mm, land grid array (LGA) package

APPLICATIONS

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Industrial scanners

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Test and instrumentation

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Cellular infrastructure: 5G millimeter wave

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Military radios, radars, and electronic counter measures (ECMs)

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Microwave radios and very small aperture terminals (VSATs)

FUNCTIONAL BLOCK DIAGRAM

Figure 1. Functional Block Diagram

GENERAL DESCRIPTION

The ADRF5702 is a 8-bit digital attenuator with a 31.875dB attenu-

ation range and 0.125dB step size manufactured in a silicon on

insulator (SOI) process.

This device operates from 50MHz to 20GHz with an insertion

loss lower than 2.6dB and excellent attenuation accuracy. The

ADRF5702 has RF input power handling capabilities of 27dBm

average and 29dBm peak for all states from the ATTIN pin.

The ADRF5702 requires a single-supply voltage of 5V or 3.3V. The

device does not support supply intermediate supply voltage levels

except values given in the Electrical Specifications section.

The device features serial or parallel mode control and complemen-

tary metal-oxide semiconductor (CMOS)-/low voltage transistor to

transistor logic (LVTTL)-compatible controls.

The ADRF5702 RF ports are designed to match a characteristic

impedance of 50Ω.

The ADRF5702 comes in a 24-terminal, 4.0mm × 4.0mm, land grid

array (LGA) package and can operate from −40°C to +105°C.