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)
PLL/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
Package Size: mm2:W x L (PKG)
Pin/Package
Approx. Price (US$)
TRF3705 TRF370315 TRF370317 TRF370333 TRF370417 TRF372017 TRF3722 TRF37T05
300    350    400    350    50    300    400    300   
4000    4000    4000    4000    6000    4800    4200    4000   
0.25    1.5    1.7    3.3    1.7    1.7    0.25    0.25   
No    No    No    No    No    Yes    Yes    No   
13    9    12    9    12    12    12    13   
30    23    26.5    23    26.5    26    31    30   
-160    -163    -163    -163    -162    -163    -159    -160   
-45    -40    -40    -40    -38    -40    -50    -45   
-45    -40    -45    -40    -50    -40    -50    -45   
3.3    5    5    5    5    5    3.3    3.3   
VQFN    VQFN    VQFN    VQFN    VQFN    VQFN    VQFN    VQFN   
24VQFN: 16 mm2: 4 x 4(VQFN)    24VQFN: 16 mm2: 4 x 4(VQFN)    24VQFN: 16 mm2: 4 x 4(VQFN)    24VQFN: 16 mm2: 4 x 4(VQFN)    24VQFN: 16 mm2: 4 x 4(VQFN)    48VQFN: 49 mm2: 7 x 7(VQFN)    48VQFN: 49 mm2: 7 x 7(VQFN)    24VQFN: 16 mm2: 4 x 4(VQFN)   
24VQFN    24VQFN    24VQFN    24VQFN    24VQFN    48VQFN    48VQFN    24VQFN   
5.10 | 1ku    4.95 | 1ku    4.95 | 1ku    4.95 | 1ku    9.95 | 1ku    5.50 | 1ku    7.00 | 1ku    5.10 | 1ku