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AXM-A75:  Multi-function I/O

The AXM-75 is a multi-function I/O module that adds A/D, D/A, and digital I/O signal processing functions to an FPGA board. These extension I/O modules plug directly onto many Acromag reconfigurable FPGA cards equipped with an AXM mezzanine connector.

Analog Input

There are sixteen differential analog input channels on the AXM-A75. Each input has its own high-speed 16-bit A/D converter offering the ability to simultaneously sample all channels.
At the beginning of the analog signal chain is a low-pass filter to remove any unwanted EMI. A programmable gain instrumentation amplifier scales the input and provides giga-ohm input impedance. Serial FLASH memory is included to store factory calibration constants.

Analog Output

Two quad serial input DAC devices drive eight analog output channels. Each channel has its own high-speed 16-bit D/A converter allowing simultaneous updates to all outputs.

Digital I/O

Sixteen bi-directional digital I/O channels provide the ability to monitor and control discrete devices. Each I/O channel is individually configurable as an input or output for great flexibility to match your requirements
• Operating temperature: -40 to 85°C

Features

• 16 channels of analog input capable of simultaneous sampling
• 16-bit 250kHz A/D converter on each channel
• Analog input range of ±10.24 volts
• Programmable gain of 1x, 2x, 4x, or 8x
• 8 channels of analog output capable of simultaneous updates
• Each A/D channel includes a 2K sample FIFO
• FIFO status interrupts configurable for half-full or overflow conditions
• Dual quad 16-bit serial input D/A converters with 10μS settling time
• Analog output range of ±10 volts
• 16 channels of general-purpose digital I/O
• Front panel 68-pin VHDCI receptacle for field I/O connections
• Example VHDL code provided in the base board’s Engineering Design Kit to control sample rate and gain selection