MAX2643:900MHz SiGe, High-Variable IP3, Low-Noise Amplifier

Industry's Smallest SiGe LNA Offers Adjustable IP3 and Gain-Step Functions

The MAX2642/MAX2643 low-cost, high third-order intercept 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 reducing the number of external components. The MAX2642/MAX2643 are designed on a low-noise, advanced silicon-germanium (SiGe) process technology. They operate from a +2.7V to +5.5V single supply and are available in the ultra-small 6-pin SC70 package.

Key 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: Typical Operating Circuit
MAX2642, MAX2643: Typical Operating Circuit
Applications/Uses
  • 800MHz/900MHz Cellular Phones
  • 868MHz/900MHz ISM-Band Wireless Data
  • 900MHz Cordless Phones
  • PMR/SMR/LMR
DataSheet
titleDownload file
MAX2642-MAX2643 Data SheetMAX2642-MAX2643.pdf
Parametrics
Part NumberRF Freq.
(MHz)
RF Freq.
(MHz)
Noise Figure
(dB)
Gain
(dB)
Input IP3
(dBm)
ISUPPLY
(mA)
Footprint
(mm x mm)
Package/PinsBudgetary
Price
minmaxSee Notes
MAX264280010001.3516.7175.32.0 x 2.1SC-70/6$1.69 @1k
MAX264302.8 to 5.3SC-70/6
Design kits & evaluation modules
Related Products
  • MAX2685:Low-Cost, 900MHz, Low-Noise Amplifier and Downconverter Mixer
  • MAX2640:300MHz to 2500MHz SiGe Ultra-Low-Noise Amplifiers
  • MAX2641:300MHz to 2500MHz SiGe Ultra-Low-Noise Amplifiers
Ordering Information
Part NumberStatusRecommended ReplacementPackageTempRoHS
MAX2643EXT+ActiveSC-70,;6 pin;5.3 mm²-40°C to +85°CLead Free
MAX2643EXT+TActiveSC-70,;6 pin;5.3 mm²-40°C to +85°CLead Free
MAX2643EXT-TNo Longer AvailableMAX2643EXT+TSC-70,;6 pin;5.3 mm²-40°C to +85°CNo
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