Rainbow Electronics MAX2643 - Manual

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
1 6 RFOUT
5 GND
BIAS
MAX2642
MAX2643
SC70-6
TOP VIEW
2
3 4
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
510 Ω
RF
OUTPUT
33k
(10k)
LOW GAIN
(ENABLE)
HIGH GAIN
(SHUTDOWN) BIAS
Typical Operating Circuit