MAX2338ETI+T Maxim Integrated Products, MAX2338ETI+T Datasheet

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MAX2338ETI+T

Manufacturer Part Number
MAX2338ETI+T
Description
RF Amplifier IC LNA/MIXER CDMA Mode CDMA LNA/Mixers
Manufacturer
Maxim Integrated Products
Datasheet
1.MAX2338ETI.pdf (13 pages)

Specifications of MAX2338ETI+T

Lead Free Status / RoHS Status
Lead free / RoHS Compliant
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.
19-1807; Rev 2; 4/03
Typical Operating Circuit appears at end of data sheet.
________________________Applications
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.
Dual-Band, Triple-Mode PCS/Cellular Phones
Dual-Mode Cellular Phones
________________________________________________________________ Maxim Integrated Products
General Description
Triple/Dual-Mode CDMA LNA/Mixers
o 1.4dB LNA Noise Figure
o 15dB LNA Gain
o Mixer Noise Figure
o Mixer Gain
o LO Frequency Divider, Saves VCO Module
o LO Output Buffers for TX
o Ultra-Small 28-Pin Leadless Package
MAX2338EGI
CLNAIN
PLNAIN
TOP VIEW
BAND
RLNA
GAIN
GND
7.5dB (CDMA)
8.7dB (AMPS)
14.5dB PCS
13.3dB Cellular
8.8dB AMPS
LIN
PART
1
2
3
4
5
6
7
MAX2338
28
8
27
9
-40°C to +85°C
TEMP RANGE
÷2
Ordering Information
26
10
Functional Diagram
25
11
QFN
Pin Configuration/
24
12
23
13
PIN-PACKAGE
28 QFN
22
14
Features
17
16
15
21
20
19
18
RBIAS
IF+
IF-
GND
BUFFEN
V
FMOUT
CC
1

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MAX2338ETI+T Summary of contents

Page 1

... Dual-Band, Triple-Mode PCS/Cellular Phones Dual-Mode Cellular Phones Typical Operating Circuit appears at end of data sheet. ________________________________________________________________ Maxim Integrated Products 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. o 1.4dB LNA Noise Figure o 15dB LNA Gain o Mixer Noise Figure 7 ...

Page 2

Triple/Dual-Mode CDMA LNA/Mixers ABSOLUTE MAXIMUM RATINGS V to GND..........................................................+0.3V to +4.3V CC Digital Input Voltage to GND ......................-0. LNA Input Level...............................................................1V peak LO, Mixer Input Levels .....................................................+5dBm Digital Input Current .........................................................±10mA Continuous Power Dissipation (T = +70°C) A ...

Page 3

Triple/Dual-Mode CDMA LNA/Mixers AC ELECTRICAL CHARACTERISTICS (MAX2338 EV kit +2.7V to +3.3V 183MHz, high side LO, LO/2 = LOW. All ports matched to 50Ω +25° +3.0V, unless otherwise noted ...

Page 4

Triple/Dual-Mode CDMA LNA/Mixers AC ELECTRICAL CHARACTERISTICS (continued) (MAX2338 EV kit +2.7V to +3.3V 183MHz, high side LO, LO/2 = LOW. All ports matched to 50Ω +25° +3.0V, unless otherwise noted.) A ...

Page 5

Triple/Dual-Mode CDMA LNA/Mixers (T = +25°C, unless otherwise noted.) A PCS-BAND SUPPLY CURRENT 30 HGHL 25 20 HGLL - TEMPERATURE (°C) CELLULAR-BAND HGHL LNA GAIN vs. CURRENT -40° ...

Page 6

Triple/Dual-Mode CDMA LNA/Mixers (T = +25°C, unless otherwise noted.) A CELLULAR-BAND HGHL LNA NOISE FIGURE vs. FREQUENCY 2.0 1.8 16mA 1.6 11mA 1.4 6mA 1.2 1.0 0.8 0.6 0.4 0.2 0 840 850 860 870 880 890 900 FREQUENCY (MHz) ...

Page 7

Triple/Dual-Mode CDMA LNA/Mixers (T = +25°C, unless otherwise noted.) A CELLULAR-BAND MIXER NOISE FIGURE vs. RF FREQUENCY 9.0 FM 8.5 HGHL 8.0 7.5 HGLL 7.0 6.5 6.0 5.5 5.0 850 860 870 880 RF FREQUENCY (MHz) CELLULAR-BAND LO BUFFER OUTPUT ...

Page 8

Triple/Dual-Mode CDMA LNA/Mixers PIN NAME LNA Bias–Setting Resistor Connection. For nominal bias, connect a 24kΩ resistor to ground. The 1 RLNA value of this resistor sets the bias current for HGHL LNAs. High-Band RF Input. Requires a blocking capacitor which ...

Page 9

Triple/Dual-Mode CDMA LNA/Mixers Detailed Description The MAX2338 consists of cellular band and PCS band (LNAs) and mixers. The IC also consists of a local oscillator (LO) divider and LO buffers for cellular and PCS bands. Low-Noise Amplifiers The MAX2338 LNAs’ ...

Page 10

Triple/Dual-Mode CDMA LNA/Mixers Operational Modes The various operating modes are controlled by the logic inputs BAND, GAIN, LIN, and LO/2. Table 1 shows the pin settings for the various operating modes. Applications Information Cascaded LNA/Mixer Performance The LNA and mixer ...

Page 11

Triple/Dual-Mode CDMA LNA/Mixers Layout Considerations Keep RF signal lines as short as possible to minimize losses and radiation. Use high Q components for the LNA input-matching circuit to achieve the lowest possi- ble noise figure. At the digital mixer outputs, ...

Page 12

Triple/Dual-Mode CDMA LNA/Mixers Table 4. MAX2338 Cellular Band Mixer Input S-Parameters High-Gain, High- Linearity Mode FREQUENCY | | S11 (MHz) 800 0.843 810 0.843 820 0.842 830 0.842 840 0.843 850 0.843 860 0.843 870 0.843 880 0.842 890 0.841 ...

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 © 2003 Maxim Integrated Products 0.01µ ...

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