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TRF3701 Datasheet(PDF) 23 Page - Texas Instruments

Part No. TRF3701
Description  0.14 GHz to 1.5 GHz QUADRATURE MODULATOR
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Maker  TI [Texas Instruments]
Homepage  http://www.ti.com
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TRF3701 Datasheet(HTML) 23 Page - Texas Instruments

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S0005-02
Single-Ended I Input
374
VCM
0.01
µF
0.1
µF
+
VOCM
VOUT−
VOUT+
8
2
1
5
4
NC
7
+VCC
3
−VCC
6
402
392
0.01
µF
0.1
µF
+8 VA
10 pF
22.1
IREF
IREF
22.1
IVIN
IVIN
0.1
µF
0.01
µF
−8 VA
392
10 pF
THS4503
DRIVING THE LOCAL OSCILLATOR INPUT
TRF3701
SLWS145D – FEBRUARY 2003 – REVISED AUGUST 2006
APPLICATION INFORMATION (continued)
Figure 55. Using the THS4503 to Condition the Baseband Inputs to the TRF3701 (I Channel Shown)
The LO pin is internally terminated to 50
Ω, thus enabling easy interface to the LO source without the need for
external impedance matching. The power level of the LO signal should be in the range of –6 to 6 dBm. For
characterization purposes, a power level of 0 dBm was chosen. An ideal way of driving the LO input of the
TRF3701 is by using the TRF3750, an ultralow-phase-noise integer-N PLL from Texas Instruments. Combining
23
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