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Contents
Abstract.........................................................................................................................9
Product Support .........................................................................................................10
The TI Advantage Extends Beyond RF to Every Other Major Wireless System
Block.......................................................................................................................10
Related Documentation...........................................................................................11
World Wide Web.....................................................................................................11
Email.......................................................................................................................11
Introduction.................................................................................................................12
Design Considerations...............................................................................................13
External Components..............................................................................................13
Board Design and Impedance Matching..................................................................13
TRF 1500 Dual-Band Receiver ...................................................................................14
TRF1500 Control State ...............................................................................................17
Low Band Cascaded Receiver Section: LNA, External SAW Filter, Mixer, and LO
Buffer Amplifier...........................................................................................................18
Low-Band LNA........................................................................................................19
Low-Band LNA Turn on Time..................................................................................19
Low-Band LNA Input...............................................................................................20
Low-Band LNA Output ............................................................................................20
Surface Acoustic Wave (SAW) Filter.......................................................................21
Low-Band Mixer......................................................................................................22
Low-Band Mixer RF Input .......................................................................................22
Low-Band Mixer LO Input .......................................................................................23
Low-Band IF Output................................................................................................23
Low-Band LO Buffer Amplifier Output .....................................................................24
Low-Band Cascaded Test Guide ...............................................................................26
LOW-Band Cascaded: Power Conversion Gain......................................................26
Low-Band Cascaded: Power Conversion Gain Reduction.......................................27
Low-Band Cascaded: Noise Figure.........................................................................28
Low-Band Cascaded: RF Input Return Loss ...........................................................30
Low-Band Cascaded: LO Input Return Loss ...........................................................30
LOW BAND: LO Buffer Output Power.....................................................................31
Low-Band: Power Leakage LO In to RF In..............................................................31
Low-Band Cascaded: Third Order Input Intercept Point (IIP3).................................32
Low-Band Cascaded: 1dB RF Input Compression Point .........................................33
Low-Band Cascaded: 1dB Blocking Point ...............................................................34
High-Band Cascaded Receiver Section: LNA, Mixer, LO Buffer Amplifier .............35
Cascaded High-Band Receiver Section: LNA, Mixer, and LO Amplifier...................35
High-Band RF Input ................................................................................................36
High-Band LO Input ................................................................................................36
High-Band IF Output ...............................................................................................38
High-Band LO Buffer Amplifier Output ....................................................................39
High-Band Cascaded Test Guide...............................................................................40
High-Band Cascaded: Power Conversion Gain.......................................................40