MAX2371:LNAs with Step Attenuator and VGA

The MAX2371/MAX2373 wideband low-noise amplifier (LNA) ICs are designed for direct conversion receiver (DCR) or very low intermediate frequency (VLIF) receiver applications. They contain single-channel, single-ended LNAs with switchable attenuator and automatic gain control (AGC) intended as a low-noise gain stage. These devices provide high gain-control range (typically 60dB) at radio frequency (RF) with excellent noise and reverse isolation characteristics. The MAX2371/MAX2373 can work over the frequency range from 100MHz to 1GHz. In practice, only a narrow band is needed in each application, so different matching circuits can be applied. The devices are dynamically configured through the digital/analog control pins to select either maximum gain and low noise figure or power-saving mode. In addition, the MAX2371/MAX2373 feature high/low-current modes, high/low attenuation modes, linearly controlled gain states, and shutdown mode.

Key Features
  • Low Noise Figure (1.8dB typical)
  • High Small-Signal Gain (15dB Nominal)
  • Wide Frequency Range of Operation (100MHz to 1GHz)
  • 20dB Step Attenuator
  • 45dB AGC Range Excluding Step Attenuator
  • 2.65V to 3.3V Single-Supply Operation
  • Shutdown Mode
  • 3.5mA Supply Current, Adjustable Down to 2.5mA
  • 40dB Reverse Isolation
MAX2371, MAX2373: Typical Operating Circuit
MAX2371, MAX2373: Typical Operating Circuit
Applications/Uses
  • Direct Conversion Receiver (DCR)
  • Very Low IF Receiver
DataSheet
TitleDownload file
MAX2371-MAX2373 Data SheetMAX2371-MAX2373.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
MAX237110010001.815-42.5 to 3.53.0 x 3.0QFN/12
TQFN/12
$1.51 @1k
MAX2373-9QFN/12
TQFN/12
$1.57 @1k
Design kits & evaluation modules
Quality and Environmental Data
Ordering Information
Part NumberStatusRecommended ReplacementPackageTempRoHS
MAX2371EGCNo Longer AvailableMAX2371ETCQFN,;12 pin;9.6 mm²-40°C to +85°CNo
MAX2371EGC+No Longer AvailableMAX2371ETC+QFN,;12 pin;9.6 mm²-40°C to +85°CLead Free
MAX2371EGC+TNo Longer AvailableMAX2371ETC+QFN,;12 pin;9.6 mm²-40°C to +85°CLead Free
MAX2371EGC-TNo Longer AvailableMAX2371ETCQFN,;12 pin;9.6 mm²-40°C to +85°CNo
MAX2371ETC+ActiveTQFN,;12 pin;9.6 mm²-40°C to +85°CLead Free
MAX2371ETC+TActiveTQFN,;12 pin;9.6 mm²-40°C to +85°CLead Free
MAX2371-MAX2373.pdf MAX2373
MAX2371.pdf MAX2371
MAX2371-MAX2373.pdf MAX2373