Adrv9001 In 1T1R Fdd With Dpd Type Application - Analog Devices ADRV9001 User Manual

Reference Manual
ADRV9001 EXAMPLE USE CASES

ADRV9001 IN 1T1R FDD WITH DPD TYPE APPLICATION

1T1R FDD with DPD Overview
With a minimum number of external components, the ADRV9001 transceiver can be used to build a complete RF-to-bits signal chain that can
serve as RF front end in FDD type applications that require DPD. Internal DPD block can be used to linearize the external power amplifier and
improve the overall system efficiency. For systems that demand superior LO phase noise performance, the ADRV9001 allows users to apply
eternal RF LO. The ADRV9001 internal AGC can be used to autonomously monitor and set the appropriate gain level for the receiver signal
chain. The ADRV9001 can control external LNA using its analog GPIOs as well as provide power amplifier bias voltage using AuxDAC outputs.
Table 4. Constraints and Limitations in 1T1R FDD with DPD Type Application
Functionality Constraints and Limitations
LO Generation In 1T1R FDD+DPD type applications, the ADRV9001 can use its internal LO to generate RF LO1 for uplink and RF LO2 for downlink. For
applications with stringent RF LO requirements, the use external LO inputs.
RF Front End For LO generation, the ADRV9001 uses internal VCO that generates square wave type signal. A square wave LO produces harmonics. For
example, depending on RF matching used on the RF ports, the second LO harmonic can be as high as −50 dBc, and the third harmonic can be
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Figure 6. ADRV9001 in 1T1R FDD with DPD Type Application
ADRV9001
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