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PDF MAX2656 Data sheet ( Hoja de datos )
| Número de pieza | MAX2656 | |
| Descripción | 1575MHz/1900MHz Variable-IP3 Low-Noise Amplifiers | |
| Fabricantes | Maxim Integrated | |
| Logotipo |  |
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Hay una vista previa y un enlace de descarga de MAX2656 (archivo pdf) en la parte inferior de esta página. Total 14 Páginas | ||
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19-1872; Rev 1; 4/02
EVFAOLLULAOTWIOSNDKAITTAMSAHNEUEATL
1575MHz/1900MHz Variable-IP3
Low-Noise Amplifiers
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 50Ω,
eliminating the need for external matching components.
A shutdown feature in the MAX2654/MAX2655 reduces
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 (RBIAS), allowing supply current to
be optimized for a specific application.
The MAX2654/MAX2655/MAX2656 operate from +2.7V
to +5.5V single supply and are available in the minia-
ture 6-pin SC70 package.
________________________Applications
GPS Receivers
GPS Receivers in Cell Phones
DCS/PCS Cell Phones
Satellite Phones
Wireless Local Loop
Pin Configuration
TOP VIEW
1 BIAS (GND) RFOUT 6
MAX2654
2 GND MAX2655 GND 5
MAX2654
3 RFIN
VCC 4
( ) IS FOR MAX2654 ONLY
SC70-6
Features
o Low Noise Figure
MAX2654: 1.5dB at 1575MHz
MAX2655: 1.45dB at 1575MHz
MAX2656: 1.9dB at 1960MHz
o High Gain
MAX2654: 15.1dB at 1575MHz
MAX2655: 14.1dB at 1575MHz
MAX2656: 13.5dB at 1960MHz
o 12.7dB Gain Step (MAX2656 only)
o Integrated 50Ω Output Matching
o Variable IP3 Set by One Bias Resistor
(MAX2655/MAX2656 only)
o 0.1µA Shutdown Mode (MAX2654/MAX2655 only)
o +2.7V to +5.5V Single-Supply Operation
o Ultra-Small 6-Pin SC70 Package
Ordering Information
PART
TEMP.
RANGE
MAX2654EXT-T
MAX2655EXT-T
MAX2656EXT-T
-40°C to +85°C
-40°C to +85°C
-40°C to +95°C
PIN-
PACKAGE
6 SC70-6
6 SC70-6
6 SC70-6
SOT
TOP-
MARK
AAI
AAJ
AAK
Typical Operating Circuit
VCC = +3.0V
MAX2655
MAX2656
1
RBIAS
RFIN
C1
L1
C2
3
4 Cb
BIAS
VCTRL/GND
10k
6
RFOUT
( ) IS FOR MAX2654 ONLY
(1)
25
PART
MAX2654
MAX2655
MAX2656
FREQUENCY
1575
1575
1960
L1(nH)
5.6
5.6
4.7
C1(pF)
6
1800
1800
C2(pF)
1.6
1.5
1.2
________________________________________________________________ Maxim Integrated Products 1
For price, delivery, and to place orders, please contact Maxim Distribution at 1-888-629-4642,
or visit Maxim’s website at www.maxim-ic.com.
1 page  
1575MHz/1900MHz Variable-IP3
Low-Noise Amplifiers
Typical Operating Characteristics
(PIN = -30dBm, input and output are terminated to 50Ω, VCC = +3V, high-gain and low-gain modes are applicable only to the MAX2656,
TA = +25°C, unless otherwise noted.)
MAX2654
SUPPLY CURRENT vs. SUPPLY VOLTAGE
8
7
6
5
4
TA = +85°C
3
TA = +25°C
2 TA = -40°C
1
0
23456
SUPPLY VOLTAGE (V)
MAX2654
INPUT LOGIC CURRENT vs. TEMPERATURE
8
INPUT LOGIC HIGH AT VRFOUT
7
MAX2654
SHUTDOWN CURRENT vs. TEMPERATURE
14
12
10
8
6 VCC = +6V
4
2
0
-40 -20
VCC = +3V
0 20 40 60
TEMPERATURE (°C)
80
MAX2654
INPUT LOGIC CURRENT vs. TEMPERATURE
60
INPUT LOGIC LOW AT VRFOUT
55
MAX2654
INPUT LOGIC VOLTAGE vs. TEMPERATURE
2.0
INPUT LOGIC HIGH AT VRFOUT
1.5
INPUT LOGIC LOW AT VRFOUT
1.0
0.5
-40 -20
0 20 40 60
TEMPERATURE (°C)
80
MAX2654
INPUT IP3 vs. TEMPERATURE
-6
f1 = 1570 MHz
f2 = 1580 MHz
-7
6 50 -8
4 45 -9
0
-40 -20
0 20 40 60
TEMPERATURE (°C)
80
MAX2654
GAIN vs. FREQUENCY
16
14
12
10
8
6
4
2
0
1000 1200
1400 1600 1800 2000
FREQUENCY (MHz)
2200
40
-40 -20
0 20 40 60
TEMPERATURE (°C)
80
MAX2654
GAIN vs. SUPPLY VOLTAGE
15
14
TA = +25°C TA = -40°C
TA = +85°C
13
12
11
f0 = 1575MHz
10
2.0 2.5 3.0 3.5 4.0 4.5 5.0 5.5 6.0
SUPPLY VOLTAGE (V)
-10
-40 -20
0 20 40 60 80
TEMPERATURE (°C)
MAX2654
NOISE FIGURE vs. FREQUENCY
3.2
3.0
2.8
2.6
2.4
2.2
2.0
1.8
1.6
1000
1200 1400 1600 1800
FREQUENCY (MHz)
2000
_______________________________________________________________________________________ 5
5 Page 
1575MHz/1900MHz Variable-IP3
Low-Noise Amplifiers
Typical Operating Characteristics (continued)
(PIN = -30dBm, input and output are terminated to 50Ω, VCC = +3V, high-gain and low-gain modes are applicable only to the MAX2656,
TA = +25°C, unless otherwise noted.)
MAX2656
INPUT/OUTPUT RETURN LOSS vs. FREQUENCY
0 HIGH-GAIN MODE
-2
OUTPUT
RETURN LOSS
-4
-6
-8 INPUT
RETURN LOSS
-10
-12
-14
1000 1200 1400 1600 1800 2000 2200
FREQUENCY (MHz)
MAX2656
REVERSE ISOLATION vs. FREQUENCY
-20
-25 LOW-GAIN MODE
-30
-35
-40
-45 HIGH-GAIN MODE
-50
-55
-60
1000 1200 1400 1600 1800 2000 2200
FREQUENCY (MHz)
MAX2656
GAIN STEP TIME FROM LOW TO HIGH
-10
-15
-20
-25
-30
2.0µs
-35
-40
0
1.0 2.0 3.0
TIME (µs)
4.0
MAX2656
GAIN STEP TIME FROM HIGH TO LOW
-10
-15
-20
-25
-30
2.0µs
-35
-40
0
1.0 2.0 3.0
TIME (µs)
4.0
MAX2656
OUTPUT POWER vs. INPUT POWER
10
8 fIN = 1960MHz
6 HIGH-GAIN MODE
4
2
0 RBIAS = 392Ω ±1%
-2
-4
-6 RBIAS = 715Ω ±1%
-8
-10 RBIAS = 511Ω ±1%
-12
-14
-16
-18
-20
-30 -25 -20 -15 -10 -5
0
INPUT POWER (dBm)
MAX2656
OUTPUT POWER vs. INPUT POWER
2
fIN = 1960MHz
-2 LOW-GAIN MODE
-6
-10 RBIAS = 392Ω ±1%
-14
-18 RBIAS = 715Ω ±1%
-22
RBIAS = 511Ω ±1%
-26
-30
-30 -25 -20 -15 -10 -5
INPUT POWER (dBm)
0
MAX2656
P1dB vs. RBIAS
4
fIN = 1960MHz
2 LOW-GAIN MODE TA = +40°C
0
-2
-4 TA = +25°C
-6 TA = +85°C
-8
MAX2656
P1dB vs. RBIAS
4
fIN = 1960MHz
2 HIGH-GAIN MODE
0
-2 TA = -40°C
-4
-6
TA = +85°C
-8
-10 TA = +25°C
-10
200 400 600 800 1000 1200 1400 1600
RBIAS (Ω)
-12
200 400 600 800 1000 1200 1400 1600
RBIAS (Ω)
______________________________________________________________________________________ 11
11 Page | ||
| Páginas | Total 14 Páginas | |
| PDF Descargar | [ Datasheet MAX2656.PDF ] | |
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