MAX2395 Datasheet, PDF (1/13 Pages) Maxim Integrated Products – WCDMA Quasi-Direct Modulator with VGA and PA Driver

19-2970; Rev 3; 1/09
EVAALVUAAILTAIOBNLEKIT
WCDMA Quasi-Direct Modulator
with VGA and PA Driver
General Description
The MAX2395 fully monolithic quasi-direct modulator IC
is designed for use in WCDMA/UMTS transmitters. The
quasi-direct modulation architecture reduces system
cost, component count, and board space compared to
transmitters using an IF SAW filter with IF VCO and IF
synthesizer blocks.
The MAX2395 includes I/Q baseband filters, an IF I/Q
modulator with VGA, a fully monolithic VCO with PLL,
an upconverter mixer, an RF VGA, and a power amplifi-
er (PA) driver. The use of the quasi-direct modulator
scheme ensures 5% (typ) EVM and a 30dB (min) carri-
er suppression. The RF VGA and IF VGA provide a
nominal 90dB of output power control. No external local
oscillators are required, enabling efficient implementa-
tion of variable duplex offset systems.
The PLL is programmed by loading data on the SPI™/
MICROWIRE™-compatible 3-wire serial bus. The IC
operates from a single +2.7V to +3.3V supply. The
devices are available in space-saving 28-pin QFN and
thin QFN exposed-pad packages (5mm x 5mm).
Applications
WCDMA Phones
UMTS/EDGE Phones
W-TDD Phones
Pin Configuration/
Functional Diagram
Features
o 5% EVM for P_OUT = +6dBm
o 1920MHz to 1980MHz Operation
o +2.7V to +3.3V Single-Supply Operation
o +6dBm Output Power at 72mA
o 81dB Minimum Automatic Gain-Control (AGC)
Range
o Automatic I_CC Throttle Back for Optimal Power
Consumption
o No IF SAW Filter Necessary
o On-Chip RF PLL, with Fully Monolithic VCO
o Ultra-Low External Component Count
Ordering Information
PART
MAX2395EGI
MAX2395ETI
MAX2395ETI+
TEMP RANGE
-40°C to +85°C
-40°C to +85°C
-40°C to +85°C
PIN-PACKAGE
28 QFN-EP*
28 TQFN-EP*
28 TQFN-EP*
*EP = Exposed pad.
+Denotes a lead(Pb)-free/RoHS-compliant package.
+ ²⁸
27
26
N.C. 1
SERIAL
BUS
POUT 2
VCC_PA 3
BIAS_SET 4
25 24 23 22
21 GND_VCO
20 VCC_VCO
RF
INTEGER-N
19 RFCP
LO
PLL
GEN
18 VCC_CP
VGC 5
VCC_IF 6
0°
90°
MAX2395
17 VCC_PLL
16 REF
VCC_BB 7
15 LD
8
9
10 11 12 13 14
SPI is a trademark of Motorola, Inc.
MICROWIRE is a trademark of National Semiconductor Corp.
________________________________________________________________ Maxim Integrated Products 1
For pricing, delivery, and ordering information, please contact Maxim Direct at 1-888-629-4642,
or visit Maxim’s website at www.maxim-ic.com.