300MHz to 4GHz Quadrature Modulator - TRF3705

TRF3705 (ACTIVE)

300MHz to 4GHz Quadrature Modulator

Recommended alternative parts

  • TRF3765  -  Integer-N/Fractional-N PLL with Integrated VCO (0.3 to 4.8GHz)

Special note

Eight ways to improve RF spurious performance,” EETimes.com, 02/27/2012

Eight ways to improve RF spurious performance,” EETimes.com, 02/27/2012

Description

The TRF3705 is a low-noise direct quadrature modulator, capable of converting complex modulated signals from baseband or IF directly up to RF. The TRF3705 is a high-performance, superior-linearity device that is ideal to up-convert to RF frequencies of 300 MHz (Note: appropriate matching network is required for optimal performance at 300 MHz) through 4 GHz. The modulator is implemented as a double-balanced mixer.

The RF output block consists of a differential-to-single-ended converter that is capable of driving a single-ended 50-Ω load. The TRF3705 requires a 0.25-V common-mode voltage for optimum linearity performance. The TRF3705 also provides a fast power-down pin that can be used to reduce power dissipation in TDD applications.

The TRF3705 is available in an RGE-24 VQFN package.

Features

  • High Linearity:
    • Output IP3: 30 dBm at 1850 MHz
  • Low Output Noise Floor: –160 dBm/Hz
  • 78-dBc Single-Carrier WCDMA ACPR
    at –10-dBm Channel Power
  • Unadjusted Carrier Suppression: –40 dBm
  • Unadjusted Sideband Suppression: –45 dBc
  • Single Supply: 3.3-V Operation
  • 1-bit Gain Step Control
  • Fast Power-Up/Power-Down

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Parametrics Compare all products in IQ Modulator

 
Frequency (Min) (MHz)
Frequency (Max) (MHz)
I/Q Input Common-Mode Voltage (Typ)
VCO
P1dB (Typ) (dBm)
Output IP3 (Typ) (dBm)
Noise Floor (Typ) (dBm/Hz)
Unadjusted Carrier Suppression (Typ) (dBm)
Unadjusted Sideband Suppression (Typ) (dBc)
Supply (V)
Package Group
Estimated Package Size (WxL) (mm2)
Pin/Package
TRF3705 TRF370315 TRF370317 TRF370333 TRF370417 TRF37T05
300     350     400     350     50     300    
4000     4000     4000     4000     6000     4000    
0.25     1.5     1.7     3.3     1.7     0.25    
No     No     No     No     No     No    
13     9     12     9     12     13    
30     23     26.5     23     26.5     30    
-160     -163     -163     -163     -162     -160    
-45     -40     -40     -40     -38     -45    
-45     -40     -45     -40     -50     -45    
3.3     5     5     5     5     3.3    
VQFN     VQFN     VQFN     VQFN     VQFN     VQFN    
24VQFN: 16 mm2: 4 x 4     24VQFN: 16 mm2: 4 x 4     24VQFN: 16 mm2: 4 x 4     24VQFN: 16 mm2: 4 x 4     24VQFN: 16 mm2: 4 x 4     24VQFN: 16 mm2: 4 x 4    
24VQFN     24VQFN     24VQFN     24VQFN     24VQFN     24VQFN