This version is outdated by a newer approved version.
This version (29 Apr 2014 21:38) was approved by Robin Getz.
This version (29 Apr 2014 21:38) was approved by Robin Getz.This is an old revision of the document!
Table of Contents
AD-FMCOMMS4-EBZ Functional Overview
A functional block diagram of the system is given below. The system consists of four functional partitions - receive path, transmit path, clocking and power supply. As mentioned earlier, the data path is fully integrated into AD9364. The key features of receive and transmit paths are listed below. Please refer to the device data sheet for more details.
AD9364
Receive
- Supports 1 direct conversion RF receive channels
- Fully integrated snythesizers (including loop filter)
- Data path consists of LNA, Demodulator, LPF, ADC and digital filters
- AGC, Quadrature calibration and DC offset calibration
- NF: 2.5dB @1GHz
- ADC: Continous time sigma-delta, 640MSPS
- Digital Filters: 128 complex taps, decimation between 2 and 48
- Gain: 1dB step size, 80dB analog range, 30dB digital range (post ADC scaling)
- On-chip sensor for temperature-corrected RSSI
Transmit
- Supports 1 direct conversion RF receive channels
- Fully integrated snythesizers (including loop filter)
- Data path consists of digital filters, DAC and Modulators
- Digital Filters: 128 complex taps, interpolation between 2 and 48
- Gain: 0.25dB step size, 86dB range.
- DAC: 320MSPS
Clocking
The clocks are managed by the device and are software programmable. Please refer to the device data sheet for the various clocks within the device. The board provides a 40MHz crystal for the AD9364.
SPI
The SPI signals are directly passed to the FMC connector.
Control/Monitor
The device allows real-time control via dedicated pins. These signals are passed to the FMC connector. The functionality of these pins are programmable and includes gain, synchronization, state machine control etc. Please refer to the data sheet for more details.
The device also allows real-time monitoring of internal signals via another set of dedicated pins. Again, these signals are passed to the FMC connector. The internal signals are multiplexed into these pins- and details of which are best described in the data sheet.
Power
resources/eval/user-guides/ad-fmcomms4-ebz/hardware/functional_overview.1398800310.txt.gz · Last modified: 29 Apr 2014 21:38 by Robin Getz