2 dB LSB, 4-Bit, Silicon Digital Attenuator,

10 MHz to 60 GHz

Data Sheet

ADRF5740

Rev. 0

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FEATURES

Ultrawideband frequency range: 10 MHz to 60 GHz

Attenuation range: 2 dB steps to 22 dB

Low insertion loss

1.4 dB up to 20 GHz

2.2 dB up to 44 GHz

3.3 dB up to 55 GHz

Attenuation accuracy

±(0.1 + 1.0% of state) up to 20 GHz

±(0.2 + 3.0% of state) up to 44 GHz

±(0.2 + 7.0% of state) up to 55 GHz

Typical step error

±0.30 dB up to 20 GHz

±0.50 dB up to 44 GHz

±0.60 dB up to 55 GHz

High input linearity

P0.1dB: 25.5 dBm typical

IP3: 45 dBm typical

High RF input power handling: 24 dBm average, 24 dBm peak

Tight distribution in relative phase

No low frequency spurious signals

Parallel mode control, CMOS and LVTTL compatible

RF amplitude settling time (0.1 dB of final RF output): 175 ns

16-terminal, 2.5 mm × 2.5 mm, RoHS compliant LGA package

APPLICATIONS

Industrial scanners

Test and instrumentation

Cellular infrastructure: 5G millimeter wave

Military radios, radars, electronic counter measures (ECMs)

Microwave radios and very small aperture terminals (VSATs)

FUNCTIONAL BLOCK DIAGRAM

PACKAGE

BASE

GND

4-BIT DIGITAL

ATTENUATOR

PARALLEL

INTERFACE

VDD

D4

VSS

GND

ATTOUT

1

D5

2

GND

3

ATTIN

4

12

11

10

9

6

5

7

8

16

15

14

13

Figure 1.

GENERAL DESCRIPTION

The ADRF5740 is a silicon, 4-bit digital attenuator with 22 dB

attenuation control range in 2 dB steps.

The ADRF5740 operates from 10 MHz to 60 GHz with less than

3.3 dB of insertion loss and with ±(0.2 + 7.0% of attenuation state)

of attenuation accuracy at 55 GHz. The ATTIN port of the

ADRF5740 has an RF input power handling capability of 24 dBm

average and 24 dBm peak for all states.

The ADRF5740 requires a dual supply voltage of +3.3 V and

−3.3 V. The ADRF5740 features parallel mode control, and

CMOS- and low voltage transistor to transistor logic (LVTTL)-

compatible controls.

The ADRF5740 RF ports are designed to match a characteristic

impedance of 50 Ω. The ADRF5740 comes in a 16-terminal,

2.5 mm × 2.5 mm, RoHS compliant, land grid array (LGA)

package and operates from −40°C to +105°C.