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MAX2643EXT+T

P1-P3P4-P6P7-P9P10-P12P13-P15P16-P16
General Description
The MAX2642/MAX2643 low-cost, high third-order inter-
cept point (IP3), low-noise amplifiers (LNAs) are
designed for applications in cellular, ISM, SMR, and
PMR systems. They feature a programmable bias,
allowing the IP3 and supply current to be optimized for
specific applications. These LNAs provide up to 0dBm
input IP3 while maintaining a low noise figure of 1.3dB.
The gain for these devices is typically 17dB. The
MAX2642 also features a 13dB attenuation step, which
extends the LNA’s dynamic range. Both devices feature
a shutdown mode that minimizes power consumption.
On-chip output matching saves board space by reduc-
ing the number of external components.
The MAX2642/MAX2643 are designed on a low-noise,
advanced silicon-germanium (SiGe) process technolo-
gy. They operate from a +2.7V to +5.5V single supply
and are available in the ultra-small 6-pin SC70 package.
________________________Applications
800MHz/900MHz Cellular Phones
900MHz Cordless Phones
868MHz/900MHz ISM-Band Wireless Data
PMR/SMR/LMR
Features
♦ Wide Frequency Range: 800MHz to 1000MHz
♦ High Output IP3 and Adjustable
+17dBm at 5.3mA
+7dBm at 2.8mA
♦ Low Noise Figure: 1.3dB at 900MHz
♦ 13dB Attenuation Step (MAX2642)
♦ On-Chip Output Matching
♦ Low-Power Shutdown Mode
♦ +2.7V to +5.5V Single-Supply Operation
♦ Ultra-Small SC70-6 Package
MAX2642/MAX2643
900MHz SiGe, High IP3,
Low-Noise Amplifiers
________________________________________________________________ Maxim Integrated Products 1
GND
V
CC
RFIN
16RFOUT
5 GND
BIAS
MAX2642
MAX2643
SC70-6
TOP VIEW
2
34
Pin Configuration
19-1682; Rev 0; 4/00
For free samples and the latest literature, visit www.maxim-ic.com or phone 1-800-998-8800.
For small orders, phone 1-800-835-8769.
EVALUATION KIT MANUAL
FOLLOWS DATA SHEET
Ordering Information
6 SC70-6
PIN-
PACKAGE
TEMP. RANGE
-40°C to +85°C
MAX2642EXT-T
PART
AAC
TOP
MARK
6 SC70-6-40°C to +85°C
MAX2643EXT-T
AAD
MAX2642
MAX2643
RF
INPUT
GND
RFIN RFOUT
( ) ARE FOR MAX2643.
C1
3.3pF
L1
8.7nH
BIAS
V
CC
V
CC
47pF
R
BIAS
510Ω
RF
OUTPUT
33k
(10k)
LOW GAIN
(ENABLE)
HIGH GAIN
(SHUTDOWN)
BIAS
Typical Operating Circuit
MAX2642/MAX2643
900MHz SiGe, High IP3,
Low-Noise Amplifiers
2 _______________________________________________________________________________________
ABSOLUTE MAXIMUM RATINGS
DC ELECTRICAL CHARACTERISTICS—MAX2642
(V
CC
= +2.7V to +5.5V, T
A
= -40°C to +85°C, no RF signal applied, RFIN and RFOUT are AC-coupled and terminated to 50Ω, high-
gain mode. Typical values are at V
CC
= 3.0V, T
A
= +25°C, unless otherwise noted.) (Notes 1, 2, 3)
DC ELECTRICAL CHARACTERISTICS—MAX2643
(V
CC
= +2.7V to +5.5V, T
A
= -40°C to +85°C, no RF signal applied, RFIN and RFOUT are AC-coupled and terminated to 50Ω. Typical
values are at V
CC
= 3.0V, T
A
= +25°C, unless otherwise noted.) (Notes 1, 8, 9)
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 +6V
RFOUT to GND...........................................-0.3V to (V
CC
+ 0.3V)
RFIN to GND ..................................................................0 to 0.9V
RFIN Power (50Ω source) ................................................+5dBm
BIAS to GND ................................................................0 to +0.3V
Operating Temperature Range ...........................-40°C to +85°C
Maximum Junction Temperature .....................................+150°C
Continuous Power Dissipation (T
A
= +70°C)
SC70-6 (derate 3.1mW/°C above +70°C)...................245mW
Storage Temperature Range .............................-65°C to +150°C
Lead Temperature (soldering, 10s) .................................+300°C
PARAMETER CONDITIONS
MIN
TYP
MAX
UNITS
Supply Voltage 2.7 5.5 V
High-gain mode, R
BIAS
= 510Ω, T
A
= +25°C 5.3 6.7
R
BIAS
= 510Ω, T
A
= -40°C to +85°C 7.5
R
BIAS
= 806Ω 3.6
R
BIAS
= 1.1kΩ 2.8
Operating Supply Current
Low-gain mode, R
BIAS
= 510Ω, T
A
= 25°C 5.9
mA
Shutdown Supply Current BIAS = unconnected (see Applications Information) 0.2 mA
High-gain mode (Note 4) 0.6
Gain Control Voltage Input
Low-gain mode (Note 5) 2.0
V
High-gain mode (Note 6) -10 0
Gain Control Input Current
Low-gain mode (Note 7) 0 50
µA
PARAMETER CONDITIONS MIN TYP MAX UNITS
Supply Voltage 2.7 5.5 V
R
BIAS
= 510Ω, T
A
= +25°C 5.1 6.5
R
BIAS
= 510Ω, T
A
= -40°C to +85°C 7.3
R
BIAS
= 806Ω 3.4
Operating Supply Current
R
BIAS
= 1.1kΩ 2.6
mA
Shutdown Supply Current Shutdown mode (see Applications Information) 0.2 10 µA
Normal operation (Note 10) 2.0
Shutdown Control Input Voltage
Shutdown mode (Note 11) 0.6
V
Normal operation (Note 7) 0 10
Shutdown Control Input Current
Shutdown mode (Note 6) -5 5
µA
MAX2642/MAX2643
900MHz SiGe, High IP3,
Low-Noise Amplifiers
_______________________________________________________________________________________ 3
AC ELECTRICAL CHARACTERISTICS
(MAX2642/MAX2643 EV kits, P
RFIN
= -30dBm, f
RFIN
= 900MHz, input and output are terminated to 50Ω, V
CC
= +3.0V, T
A
= +25°C,
R
BIAS
= 510Ω, unless otherwise noted.) (Note 12)
PARAMETER CONDITIONS
MIN
TYP
MAX
Operating Frequency Range (Note 13)
800 1000
Gain (Note 14) T
A
= +25°C
14.5 16.7
19 dB
Gain Variation Over Temperature
T
A
= -40°C to +85°C
±0.35 ±0.75
dB
Attenuation Step MAX2642 only 13 dB
R
BIAS
= 510Ω 0
R
BIAS
= 806Ω -5
Input Third-Order Intercept Point
(Note 15)
R
BIAS
= 1.1kΩ -10
-18
Input 1dB Compression Point
MAX2642, low-gain mode -17
1.35
1.6
Noise Figure (Note 16)
MAX2642, low-gain mode 4.3
dB
-10 -12
Input Return Loss
MAX2642, low-gain mode -10 -18
dB
-10 -14
Output Return Loss
MAX2642, low-gain mode -10 -11
dB
-20 -26
Reverse Isolation
MAX2642, low-gain mode -10 -17
dB
Gain-Step Response Time MAX2642 5 10 µs
MAX2643 6 10
Shutdown Response Time
MAX2642, through series switch at BIAS 12
µs
Note 1: Devices are production tested at T
A
= +25°C. Minimum and maximum values are guaranteed by design and characterization
over temperature and supply voltage.
Note 2: High-gain mode is set for the MAX2642 by connecting RFOUT to GND through a 33kΩ resistor.
Note 3: Low-gain mode is applicable only to the MAX2642 and is set by connecting RFOUT to V
CC
through a 33kΩ resistor.
Note 4: Maximum DC voltage through a 33kΩ resistor that sets the MAX2642 to operate in high-gain mode.
Note 5: Minimum DC voltage through a 33kΩ resistor that sets the MAX2642 to operate in low-gain mode.
Note 6: DC current required when RFOUT is connected to GND through a 33kΩ resistor (MAX2642) and 10kΩ resistor (MAX2643).
Note 7: DC current required when RFOUT is connected to V
CC
through a 33kΩ resistor (MAX2642) and 10kΩ resistor (MAX2643).
Note 8: Normal operation is set for the MAX2643 by connecting RFOUT to V
CC
through a 10kΩ resistor.
Note 9: Shutdown is set for the MAX2643 by connecting RFOUT to GND through a 10kΩ resistor.
Note 10: Minimum DC voltage through a 10kΩ resistor that sets the MAX2643 to operate in normal mode.
Note 11: Maximum DC voltage through a 10kΩ resistor that sets the MAX2643 to operate in shutdown mode.
Note 12: Min/Max limits are guaranteed by design and characterization, except gain is production tested at T
A
= +25°C.
Note 13: The part has been characterized at the specified frequency range. Operation outside this range is possible but not guar-
anteed.
Note 14: Devices are production tested at T
A
= +25°C.
Note 15: Measured with two input tones, f
1
= 895MHz and f
2
= 905MHz, both at -30dBm per tone.
Note 16: Excludes PC board losses (0.25dB typical at the input of the MAX2642/MAX2643 EV kit).
P1-P3P4-P6P7-P9P10-P12P13-P15P16-P16

MAX2643EXT+T

Mfr. #:
Buy MAX2643EXT+T
Manufacturer:
Maxim Integrated
Description:
RF Amplifier 900MHz SiGe High Variable IP3
Lifecycle:
New from this manufacturer.
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