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Maxim Integrated - 900MHz SiGe / High IP3 / Low-Noise Amplifiers

Numéro de référence MAX2642
Description 900MHz SiGe / High IP3 / Low-Noise Amplifiers
Fabricant Maxim Integrated 
Logo Maxim Integrated 





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MAX2642 fiche technique
19-1682; Rev 0; 4/00
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900MHz SiGe, High IP3,
Low-Noise Amplifiers
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
o Wide Frequency Range: 800MHz to 1000MHz
o High Output IP3 and Adjustable
+17dBm at 5.3mA
+7dBm at 2.8mA
o Low Noise Figure: 1.3dB at 900MHz
o 13dB Attenuation Step (MAX2642)
o On-Chip Output Matching
o Low-Power Shutdown Mode
o +2.7V to +5.5V Single-Supply Operation
o Ultra-Small SC70-6 Package
Ordering Information
PART
TEMP. RANGE
MAX2642EXT-T -40°C to +85°C
MAX2643EXT-T -40°C to +85°C
PIN-
PACKAGE
6 SC70-6
6 SC70-6
TOP
MARK
AAC
AAD
RF
INPUT
Typical Operating Circuit
VCC
47pF
VCC
RBIAS
510BIAS
BIAS
MAX2642
MAX2643
LOW GAIN
(ENABLE)
HIGH GAIN
(SHUTDOWN)
L1
8.7nH
C1
3.3pF
RFIN
RFOUT
33k
(10k)
RF
OUTPUT
GND
( ) ARE FOR MAX2643.
Pin Configuration
TOP VIEW
BIAS 1
6 RFOUT
MAX2642
GND 2 MAX2643 5 GND
RFIN 3
4 VCC
SC70-6
________________________________________________________________ Maxim Integrated Products 1
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.

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