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MAX2338ETI+T

P1-P3P4-P6P7-P9P10-P12P13-P13
General Description
The MAX2338 receiver RF front-end IC is designed for
dual-band CDMA cellular phones and can also be used
in dual-band TDMA, GSM, or EDGE cellular phones.
Thanks to the MAX2338’s on-chip low-power LO
divider, the cellular VCO module can be eliminated.
The MAX2338 includes a low-noise amplifier (LNA) with
an adjustable high-input third-order intercept point
(IIP3) to minimize intermodulation and cross-modulation
in the presence of large interfering signals. For cellular
band operation, a low-gain LNA is available for higher
cascaded IIP3 at lower current.
The CDMA mixers are designed for high linearity, low
noise, and differential IF outputs. The FM mixer is
designed for lower current and single-ended output.
The MAX2338 triple-mode LNA/mixer includes an on-
chip LO frequency divider to allow the use of a single
VCO for both bands. This device is available in an ultra-
small 28-pin leadless QFN package.
________________________Applications
Dual-Band, Triple-Mode PCS/Cellular Phones
Dual-Mode Cellular Phones
Features
♦ 1.4dB LNA Noise Figure
♦ 15dB LNA Gain
♦ Mixer Noise Figure
7.5dB (CDMA)
8.7dB (AMPS)
♦ Mixer Gain
14.5dB PCS
13.3dB Cellular
8.8dB AMPS
♦ LO Frequency Divider, Saves VCO Module
♦ LO Output Buffers for TX
♦ Ultra-Small 28-Pin Leadless Package
MAX2338
Triple/Dual-Mode CDMA LNA/Mixers
________________________________________________________________ Maxim Integrated Products 1
MAX2338
2526
27
28 22
2324
8
9
10 11 12 13 14
15
16
17
18
19
20
21
1
2
3
4
5
6
7
N.C.
GND
LO/2
LOIN
GND
PLOOUT
CLOOUT
CMIXIN
CLNAOUT
GND
PLNAOUT
GND
GND
PMIXIN
GND
CLNAIN
LIN
GAIN
PLNAIN
RLNA
IF-
GND
BUFFEN
V
CC
FMOUT
IF+
RBIAS
QFN
TOP VIEW
÷2
BAND
19-1807; Rev 2; 4/03
E
V
A
L
U
A
T
I
O
N
K
I
T
A
V
A
I
L
A
B
L
E
Ordering Information
28 QFN
PIN-PACKAGETEMP RANGE
-40°C to +85°CMAX2338EGI
PART
Pin Configuration/
Functional Diagram
Typical Operating Circuit appears at end of data sheet.
For pricing, delivery, and ordering information, please contact Maxim/Dallas Direct! at
1-888-629-4642, or visit Maxim’s website at www.maxim-ic.com.
MAX2338
Triple/Dual-Mode CDMA LNA/Mixers
2 _______________________________________________________________________________________
ABSOLUTE MAXIMUM RATINGS
DC ELECTRICAL CHARACTERISTICS
(V
CC
= +2.7V to +3.3V, R
RBIAS
= R
RLNA
= 24kΩ, BUFFEN = LOW, all RF and IF outputs connected to V
CC
, no RF applied, T
A
= -40°C
to +85°C. Typical values are at +3.0V and T
A
= +25°C, unless otherwise noted. Refer to Operational Modes table for control logic.)
Stresses beyond those listed under “Absolute Maximum Ratings” may cause permanent damage to the device. These are stress ratings only, and functional
operation of the device at these or any other conditions beyond those indicated in the operational sections of the specifications is not implied. Exposure to
absolute maximum rating conditions for extended periods may affect device reliability.
V
CC
to GND..........................................................+0.3V to +4.3V
Digital Input Voltage to GND......................-0.3V to (V
CC
+ 0.3V)
LNA Input Level...............................................................1V peak
LO, Mixer Input Levels .....................................................+5dBm
Digital Input Current .........................................................±10mA
Continuous Power Dissipation (T
A
= +70°C)
28-Pin QFN (derate 28.5mW/°C above T
A
= +70°C).........2W
Operating Temperature Range ...........................-40°C to +85°C
Junction Temperature......................................................+150°C
Storage Temperature Range .............................-65°C to +150°C
Lead Temperature (soldering, 10s) ................................ +300°C
PARAMETER CONDITIONS MIN TYP MAX UNITS
PCS CDMA MODES
High-gain, low-linearity mode 18 24
Operating Supply Current
High-gain, high-linearity mode 25 33
mA
CELLULAR CDMA MODE
Low-gain mode 19.5 25
High-gain, low-linearity mode 18 24
Operating Supply Current
High-gain, high-linearity mode 28 35
mA
FM MODE
Operating Supply Current 13.5 17 mA
SHUTDOWN MODE
Shutdown Supply Current 0.1 5 µA
ALL MODES
LO/2 = LOW 7.2 9.5
LO Buffer Supply Current BUFFEN = HIGH
LO/2 = HIGH 10.3
mA
Additional Operational Current
Divider Active
Cellular and FM mode; LO/2 = HIGH 1.2 mA
Digital Input Logic High 2.0 V
Digital Input Logic Low 0.6 V
Digital Input High Current 5µA
Digital Input Low Current -25 µA
MAX2338
Triple/Dual-Mode CDMA LNA/Mixers
_______________________________________________________________________________________ 3
AC ELECTRICAL CHARACTERISTICS
(MAX2338 EV kit, V
CC
= +2.7V to +3.3V, f
PLNAIN
= f
PMIXIN
= 1930MHz to 1990MHz, f
CLNAIN
= f
CMIXIN
= 869MHz to 894MHz, f
IF
=
183MHz, high side LO, LO/2 = LOW. All ports matched to 50Ω, R
RLNA
= R
RBIAS
= 24kΩ, T
A
= -40°C to +85°C. Typical values are at
T
A
= +25°C, V
CC
= +3.0V, unless otherwise noted.)
PARAMETER CONDITIONS MIN TYP MAX UNITS
OVERALL PERFORMANCE
Low-Band RF Frequency Range 869 894 MHz
High-Band RF Frequency Range 1930 1990 MHz
Low-Band LO Frequency Range After divider if active (Note 1) 950 1100 MHz
High-Band LO Frequency Range (Note 1) 1750 2210 MHz
IF Frequency Range (Note 1) 80 220 MHz
LO Input Level -7 -3 0 dBm
CELLULAR LNA PERFORMANCE
HIGH-GAIN, HIGH-LINEARITY MODES
Gain (Note 2) 14.0 15.7 17.0 dB
Noise Figure (Note 3) T
A
= +25°C1.41.6dB
Noise Figure Change Due to
Temperature
T
A
= +25°C to T
MAX
0.3 dB
IIP3 (Notes 3, 4) 9.5 12 dBm
CDMA HIGH-GAIN, LOW-LINEARITY MODE AND FM MODE
Gain (Note 2) 13 14.7 16.5 dB
Noise Figure (Note 3) T
A
= +25°C1.41.7dB
IIP3 (Note 3, 4) 2.5 5.5 dBm
CDMA LOW-GAIN MODE
Gain (Note 2) -4.0 -2.3 0 dBm
Noise Figure (Note 3) 56dB
IIP3 (Notes 3, 4) 15 18 dBm
PCS LNA PERFORMANCE
CDMA HIGH-GAIN, HIGH-LINEARITY MODE
Gain (Note 2) 13.8 15.3 16.9 dB
Noise Figure (Note 3) T
A
= +25°C1.41.7dB
Noise Figure Change Due to
Temperature
T
A
= +25°C to T
MAX
0.3 dB
IIP3 (Notes 3, 5) 5.0 7.7 dBm
CDMA HIGH-GAIN, LOW-LINEARITY MODE
Gain (Note 2) 13.0 14.5 16.5 dB
Noise Figure (Note 3) T
A
= +25°C1.41.7dB
IIP3 (Notes 3, 5) 2.5 7.5 dBm
CELLULAR MIXER PERFORMANCE
CDMA HIGH-GAIN, HIGH-LINEARITY, AND LOW-GAIN MODES
Gain (Note 2) 10.3 13.3 16.4 dB
Noise Figure (Note 3) T
A
= +25°C7.89.0dB
IIP3 (Note 4) 3.0 5.5 dBm
P1-P3P4-P6P7-P9P10-P12P13-P13

MAX2338ETI+T

Mfr. #:
Buy MAX2338ETI+T
Manufacturer:
Maxim Integrated
Description:
RF Front End Triple/Dual-Mode CDMA LNA/Mixer
Lifecycle:
New from this manufacturer.
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