This version (29 Apr 2022 09:38) was approved by Antoniu Miclaus.
Table of Contents
ADMV1014 - No-OS Driver
Supported Devices
Evaluation Boards
Overview
The ADMV1014 is a silicon germanium (SiGe), wideband, microwave downconverter optimized for point to point microwave radio designs operating in the 24 GHz to 44 GHz frequency range. The downconverter offers two modes of frequency translation. The device is capable of direct quadrature demodulation to baseband inphase (I)/quadrature (Q) output signals, as well as image rejection downconversion to a complex intermediate frequency (IF) output carrier frequency. The baseband outputs can be dc-coupled, or, more typically, the I/Q outputs are ac-coupled with a sufficiently low high-pass corner frequency to ensure adequate demodulation accuracy. The serial port interface (SPI) allows fine adjustment of the quadrature phase to allow the user to optimize I/Q demodulation performance. Alternatively, the baseband I/Q outputs can be disabled, and the I/Q signals can be passed through an on-chip active balun to provide two single-ended complex IF outputs anywhere between 800 MHz and 6000 MHz. When used as an image rejecting downconverter, the unwanted image term is typically suppressed to better than 30 dBc below the wanted sideband. The ADMV1014 offers a flexible local oscillator (LO) system, including a frequency quadruple option allowing up to a 41 GHz range of LO input frequencies to cover a radio frequency (RF) input range as wide as 24 GHz to 44 GHz. A square law power detector is provided to allow monitoring of the power levels at the mixer inputs. The detector output provides closed-loop control of the RF input variable attenuator through an external op amp error integrator circuit option. The ADMV1014 downconverter comes in a compact, thermally enhanced, 5 mm × 5 mm LGA package. The ADMV1014 operates over the −40°C to +85°C case temperature range.
Applications:
- Point to point microwave radios
- Radar, electronic warfare systems
- Instrumentation, automatic test equipment (ATE)
Driver Description
The driver contains two parts:
- The driver for the ADMV1014 part, which may be used, without modifications, with any microcontroller.
- The Communication Drivers, where the specific communication functions for the desired type of processor and communication protocol have to be implemented. This driver implements the communication with the device and hides the actual details of the communication protocol to the ADI driver.
The Communication Driver has a standard interface, so the ADMV1014 driver can be used exactly as it is provided.
The Communication Drivers must include the SPI transmission methods.
For the SPI method, the ADMV1014 driver calls three functions:
- spi_init() - initializes the SPI communication peripheral.
- spi_remove() – frees memory allocated by the SPI communication driver.
- spi_write_and_read() – conduct information transfer with the device.
Code Documentation
Source code documentation for the driver is automatically generated using the Doxygen tool and it is available at:
Downloads
resources/tools-software/uc-drivers/admv1014.txt · Last modified: 28 Apr 2022 15:08 by Antoniu Miclaus