Document Number: MMDS20254H
Rev. 2, 1/2015
Freescale Semiconductor
Technical Data
Advanced Doherty Alignment
Module (ADAM)
MMDS20254HT1
The MMDS20254H is an integrated module designed for use in base station
transmitters in conjunction with high power Doherty amplifiers. The device is
designed to enable accurate alignment of phase and amplitude on the carrier
and peaking amplifiers to ensure performance consistency, in particular for
asymmetric implementations. The MMDS20254H enables superior linearity--
efficiency trade--off while improving output power. It contains a 90 coupler,
digitally selectable phase shifters and step attenuators, and operates from a
single voltage supply. The MMDS20254H is suitable for transmit protocols such
as GSM, W--CDMA, UMTS and LTE using frequencies from 1800 to 2200 MHz,
and is controlled using a serial peripheral interface (SPI).
1800--2200 MHz
ADAM – ADVANCED DOHERTY
ALIGNMENT MODULE
Features
Frequency: 1800--2200 MHz
Maximum RF Input Power: 25 dBm (CW)
Low Loss Power Splitter
0.5 dB Step Programmable Attenuators with 7.5 dB Maximum Range
7 per Bit Phase Shifters with 49 Maximum Range
Power up into a Selectable State
Single 5 Volt Supply
Supply Current: 12 mA
50 Ohm Operation (no external matching required)
TTL/CMOS/SPI Interface (1.8 V, 3.3 V Logic)
Cost--effective 32--Pin, 6 mm QFN Surface Mount Plastic Package
In Tape and Reel. R1 Suffix = 1,000 Units, 16 mm Tape Width, 7--inch Reel.
QFN 6 6
0
RF
out2
0 to --49
0 to 7.5 dB
0 to 7.5 dB
RF
in
0 to --49
RF
out1
-- 9 0
SERIAL DIGITAL INTERFACE
SDI SCLK LCLK SDO PUP LEN
V
BYP GND
DD
Figure 1. Functional Block Diagram
Freescale Semiconductor, Inc., 2013, 2015. All rights reserved.
MMDS20254HT1
RF Device Data
Freescale Semiconductor, Inc.
1