Data Sheet

ADRF5703

Silicon Digital Attenuator, 0.25dB LSB, 7-Bit, 9kHz to 20GHz

Rev. 0

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FEATURES

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Frequency range: 9kHz to 20GHz

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Attenuation range: 31.75dB with 0.25dB step size

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Low insertion loss

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1dB typical up to 6GHz

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1.3dB typical up to 12GHz

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1.7dB typical up to 20GHz

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Attenuation accuracy: −(4% of the attenuation state) or +(0.1)

typical up to 20GHz

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Step error: 0.20dB typical up to 20GHz

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High linearity

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Input P0.1dB

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Attenuation state < 16dB: 33dBm typical at ATTIN

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Attenuation state ≥ 16dB: 31dBm typical at ATTIN

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Input IP3: 55dBm typical at ATTIN

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High RF power handling

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27dBm average at ATTIN

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30dBm peak at ATTIN

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27dBm hot switching at ATTIN

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

final RF output): 1μs typical

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Consistent return loss at all attenuation states

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Single-supply operation with derated power handling

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No low frequency spurs and no internal voltage generation

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Serial and parallel mode control, CMOS- and 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, 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 ADRF5703 is a 7-bit digital attenuator with a 31.75dB attenu-

ation range and 0.25dB step size manufactured in a silicon on

insulator (SOI) process.

This device operates from 9kHz to 20GHz with an insertion

loss better than 1.7dB and excellent attenuation accuracy. The

ADRF5703 has RF input power handling capabilities of 27dBm

average and 30dBm peak for all states from the ATTIN pin.

The ADRF5703 operates with a dual-supply voltage +3.3V and

−3.3V. The device can also operate with a single-supply voltage

(VDD) applied while the negative supply voltage (VSS) is tied to

ground. In this operating condition, the small signal performance is

maintained while the switching characteristics, linearity, and power

handling performance are derated, see Table 2.

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 ADRF5703 comes in a 24-terminal, 4.0mm × 4.0mm, land grid

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