700 MHz to 4200 MHz,

Tx DGA

Data Sheet

ADL5335

Rev. 0

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FEATURES

Differential input to single-ended output conversion

Broad input frequency range: 700 MHz to 4200 MHz

Maximum gain: 12.0 dB typical

Gain range of 20 dB typical

Gain step size: 0.5 dB typical

Glitch free, thermometer-based digital step attenuator

Fast attack, gain switching with programmable gain step

Matched 50 Ω inputs and output

APPLICATIONS

RF power control and calibration in wireless transmitters

FUNCTIONAL BLOCK DIAGRAM

2

3

11

1

VPOS1

RFIN–

RFIN+

4

VPOS2

13

VPOS3

ENBL

12dB

0dB TO –20dB

ADL5335

5

GND1

6

GND2

7

GND3

8

GND4

9

GND5

10

RFOUT

15

SCLK

14

SDIO

12

FA

16

CS

Figure 1.

GENERAL DESCRIPTION

The ADL5335 is a digital gain amplifier (DGA) optimized for

use in wireless transmitters. A differential input and single-

ended output facilitates a balun free connection between the

broadband integrated transceivers with differential outputs and

the RF gain blocks and drivers amplifiers with single-ended inputs.

The gain is programmable via a standard Analog Devices, Inc.,

serial peripheral interface (SPI) port from a maximum gain of

12.0 dB down to a minimum gain of −8.0 dB with a gain step

size of 0.5 dB. The ADL5335 also features a fast attack function

where the gain can rapidly increase or decrease by the

application of a single pulse.

The use of a thermometer-based digital step attenuator (DSA)

ensures that gain changes are fundamentally glitch free. The

ADL5335 is packaged in a 4 mm × 4 mm, 16-lead LFCSP. A

fully populated evaluation board and system demonstration

platform (SDP)-based control software are available.