MAX2395EGI-T Maxim Integrated Products, MAX2395EGI-T Datasheet

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MAX2395EGI-T

Manufacturer Part Number
MAX2395EGI-T
Description
RF Wireless Misc WCDMA Quasi-Direct M odulator with VGA an
Manufacturer
Maxim Integrated Products
Datasheet

Specifications of MAX2395EGI-T

Lead Free Status / RoHS Status
Lead free / RoHS Compliant
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).
19-2970; Rev 3; 1/09
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.
BIAS_SET
WCDMA Phones
UMTS/EDGE Phones
W-TDD Phones
V
V
V
CC_
CC_
POUT
CC_
N.C.
VGC
BB
PA
IF
1
2
3
4
5
6
7
+
28
8
SERIAL
BUS
________________________________________________________________ Maxim Integrated Products
27
9
90°
10
26
General Description
Functional Diagram
11
Pin Configuration/
25
GEN
LO
12
24
INTEGER-N
MAX2395
Applications
13
23
PLL
RF
WCDMA Quasi-Direct Modulator
14
22
21
20
19
18
17
16
15
GND_VCO
V
RFCP
V
V
REF
LD
CC_
CC_
CC_
VCO
CP
PLL
with VGA and PA Driver
o 5% EVM for P
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)
o Automatic I
o No IF SAW Filter Necessary
o On-Chip RF PLL, with Fully Monolithic VCO
o Ultra-Low External Component Count
* EP = Exposed pad.
+ Denotes a lead(Pb)-free/RoHS-compliant package.
SPI is a trademark of Motorola, Inc.
MICROWIRE is a trademark of National Semiconductor Corp.
MAX2395EGI
MAX2395ETI
MAX2395ETI+
Range
Consumption
PART
CC
OUT
Throttle Back for Optimal Power
-40°C to +85°C
-40°C to +85°C
-40°C to +85°C
TEMP RANGE
= +6dBm
Ordering Information
PIN-PACKAGE
28 QFN-EP*
28 TQFN-EP*
28 TQFN-EP*
Features
1

Related parts for MAX2395EGI-T

MAX2395EGI-T Summary of contents

Page 1

... Single-Supply Operation o +6dBm Output Power at 72mA o 81dB Minimum Automatic Gain-Control (AGC) Range o Automatic I Consumption SAW Filter Necessary o On-Chip RF PLL, with Fully Monolithic VCO o Ultra-Low External Component Count PART Applications MAX2395EGI MAX2395ETI MAX2395ETI Exposed pad. + Denotes a lead(Pb)-free/RoHS-compliant package GND_VCO V VCO ...

Page 2

WCDMA Quasi-Direct Modulator with VGA and PA Driver ABSOLUTE MAXIMUM RATINGS V to GND ...........................................................-0.3V to +3.6V CC All Other Pins to GND..................................-0. I_, Q_, REF to GND..............................................................1V Digital Input Current .........................................................±10mA Stresses beyond those listed under “Absolute ...

Page 3

AC ELECTRICAL CHARACTERISTICS MAX2395 EV kit +2.7V to +3.3V +85°C. I/Q inputs driven differentially with low- impedance source based on 3GPP UpLink reference measurement channel (12.2kbps), envelope level 1V . Typical values are at V P-P ...

Page 4

WCDMA Quasi-Direct Modulator with VGA and PA Driver AC ELECTRICAL CHARACTERISTICS (continued) MAX2395 EV kit +2.7V to +3.3V +85°C. I/Q inputs driven differentially with low- impedance source based on 3GPP UpLink reference measurement channel (12.2kbps), envelope ...

Page 5

MPL = 1, and EVM vs. P OUT -40° +25° +85° -30 -26 -22 -18 ...

Page 6

WCDMA Quasi-Direct Modulator with VGA and PA Driver PIN NAME 1 N.C. Connect to RF GND on PCB Transmitter Output. This is an open-collector output and requires a pullup inductor to the supply 2 POUT voltage. This pullup inductor can ...

Page 7

PIN NAME Supply for VCO. Bypass to system ground with a capacitor as close to the pin as possible. Do not 20 V _VCO CC share ground vias for the bypass capacitor with any other branch (see the Typical Operating ...

Page 8

... In idle mode, the VCO, PLL, and serial interface remain on to minimize startup time. The GmC filter can be software programmed to power on or off during idle mode (see Table 5). Idle Mode is a trademark of Maxim Integrated Products, Inc. 8 _______________________________________________________________________________________ The Tx outputs are internally matched to 50Ω. The ...

Page 9

Table 2. Register Power-Up Default States (f REGISTER RFM RFR OPCTRL Table 3. Operation Control Register (OPCTRL) Bit Assignments BIT NAME POWER-UP STATE SHDN 1 IDLE_PRG 0 — 1 GmC_EN 1 PLL_EN 1 VCO_EN 1 PA_RF_IF_EN 1 X2_EN 0 MPL ...

Page 10

WCDMA Quasi-Direct Modulator with VGA and PA Driver Table 4. Reference-Divider (RFR) Register BIT NAME POWER-UP STATE RFR8 to RFR0 001010000 LD1, LD0 0 0 RCPT2, RCPT1 RCPT0 RESERVED 1 RESERVED 0 Table 5. Power-Down Modes POWER-DOWN ...

Page 11

BIT 15 BIT 14 SDATA SCLK Figure 1. 3-Wire SPI/MICROWIRE Serial-Interface Timing Diagram MSB B15 B14 B13 B12 B11 B10 B15 B14 B13 B12 B11 B10 B15 B14 B13 B12 B11 B10 OPERATION CONTROL REGISTER (16 BITS) ...

Page 12

WCDMA Quasi-Direct Modulator with VGA and PA Driver V CC N.C. 1 POWER AMPLIFIER POUT 2 V _PA CC 3 BIAS_SET 4 VGC 5 V _IF _BB ______________________________________________________________________________________ ...

Page 13

... Maxim cannot assume responsibility for use of any circuitry other than circuitry entirely embodied in a Maxim product. No circuit patent licenses are implied. Maxim reserves the right to change the circuitry and specifications without notice at any time. Maxim Integrated Products, 120 San Gabriel Drive, Sunnyvale, CA 94086 408-737-7600 ____________________ 13 © 2009 Maxim Integrated Products ...

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