Rainbow Electronics MAX2656 - Manual

General Description
The MAX2654/MAX2655/MAX2656 high third-order
intercept point (IP3), low-noise amplifiers (LNAs) are
designed for applications in GPS, PCS, WLL, and satel-
lite phone systems. The MAX2654/MAX2655/MAX2656
incorporate on-chip internal output matching to 50
Ω,
eliminating the need for external matching components.
A shutdown feature in the MAX2654/MAX2655 reduces
the operating current to 0.1µA, eliminating the need for
an external supply switch.
The MAX2654 operates in the GPS frequency of
1575MHz with 15.1dB of gain, 1.5dB noise figure, and
only consumes 5.8mA. The MAX2655 is designed with
high-input IP3 to improve operation in cellular applica-
tions where the cellular power amplifier leaks into the
GPS receiver. The MAX2656 is designed for PCS
phone applications with 13.5dB of gain in high-gain
mode and 0.8dB of gain in low-gain mode (selected by
a logic control) and 1.9dB noise figure.
The IP3 of MAX2655/MAX2656 is adjustable by a single
external bias resistor (R
BIAS ), allowing supply current to
be optimized for a specific application.
The MAX2654/MAX2655/MAX2656 operate from a
+2.7V to +5.5V single supply and are available in the
miniature 6-pin SC70 package.
________________________Applications
GPS Receivers
GPS Receivers in Cellular Phones
DCS/PCS Cellular Phones
Satellite Phones
Wireless Local Loop
Features
♦ Low Noise Figure
MAX2654: 1.5dB at 1575MHz
MAX2655: 1.45dB at 1575MHz
MAX2656: 1.9dB at 1960MHz
♦ High Gain
MAX2654: 15.1dB at 1575MHz
MAX2655: 14.1dB at 1575MHz
MAX2656: 13.5dB at 1960MHz
♦ 12.7dB Gain Step (MAX2656 only)
♦ Integrated 50Ω Output Matching
♦ Variable IP3 Set by One Bias Resistor
(MAX2655/MAX2656 only)
♦ 0.1µA Shutdown Mode (MAX2654/MAX2655 only)
♦ +2.7V to +5.5V Single-Supply Operation
♦ Ultra-Small 6-Pin SC70 Package
MAX2654/MAX2655/MAX2656
1575MHz/1900MHz Variable-IP3
Low-Noise Amplifiers
________________________________________________________________ Maxim Integrated Products 1
1 6
5
MAX2654
MAX2655
MAX2654
SC70-6
2
3 4 V CC
RFOUT
ARE FOR MAX2654 ONLY
GND GND
RFIN
BIAS (GND)
Pin Configuration
MAX2655
MAX2656
C2
3
4
6
10k Ω
Cb
(1)
1
2 5
C1
R
BIAS
V CTRL /GND
V CC = +3V
RFOUT
RFIN
L1
BIAS
( ) ARE FOR MAX2654 ONLY
Typical Operating Circuit
19-1872; Rev 1; 4/02
EVALUATION KIT
AVAILABLE
Ordering Information
PART
TEMP
RANGE
PIN-
PACKAGE
SOT
TOP-
MARK
MAX2654EXT-T -40°C to +85°C 6 SC70-6 AAI
MAX2655EXT-T -40°C to +85°C 6 SC70-6 AAJ
MAX2656EXT-T -40°C to +95°C 6 SC70-6 AAK
PART FREQUENCY L1 (nH) C1 (pF) C2 (pF)
MAX2654 1575 5.6 6 1.6
MAX2655 1575 5.6 1800 1.5
MAX2656 1960 4.7 1800 1.2
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.