0.8–6 GHz 3V Downconverter
Avago’s IAM-91563 is an economical 3V GaAs MMIC mixer
used for frequency down-conversion. RF frequency cover-
age is from 0.8 to 6 GHz and IF coverage is from 50 to 700
MHz. Packaged in the SOT-363 package, this 4.0 sq. mm.
package requires half the board space of a SOT-143 and
only 15% the board space of an SO‑8 package.
At 1.9 GHz, the IAM-91563 provides 9 dB of conversion
gain, thus eliminating an RF or IF gain stage normally
needed with a lossy mixer. LO drive power is nominally
only -5 dBm, eliminating an LO buffer amplifier. The 8.5 dB
noise figure is low enough to allow the system to use a
low cost LNA. The
system linearity for
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applications, but is
adjustable to 0 dBm.
The circuit uses GaAs PHEMT technology with proven reli-
ability, and uniformity. The MMIC consists of a cascode FET
structure that provides unbalanced gm modulation type
mixing. An on-chip LO buffer amp drives the mixer while
bias circuitry allows a single +3V supply (through a choked
IF port). The LO port is internally matched to 50 Ω. The
RF and IF ports are high impedance and require external
Surface Mount Package: SOT-363 (SC-70)
Pin Connections and Package Marking
6 IF and Vd
1. Package marking provides orientation and identification.
• Lead-free Option Available
• +0 dBm Input IP3 at 1.9 GHz
• Single +3V Supply
• 8.5 dB SSB Noise Figure at 1.9 GHz
• 9.0 dB Conversion Gain at 1.9 GHz
• Ultra-miniature Package
• Downconverter for PCS, PHS, ISM, WLL, and other
Attention: Observe precautions for
handling electrostatic sensitive devices.
ESD Human Body Model (Class 0)
Refer to Avago Application Note A004R:
Electrostatic Discharge Damage and Control.
IF and Vd