AXM-A75: Multi-function I/O for PMC & XMC FPGA.
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.
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.
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.
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.
Input configuration: 16 differential channels with a separate A/D converter on each channel.
A/D resolution: 16 bits.
Input range: ±10.24 volts.
Programmable gain: 1x, 2x, 4x, or 8x.
Input impedance: 1 giga-ohm.
Maximum throughput rate: 2μS A/D (500kHz).
A/D trigger: FPGA controlled.
Signal-to-noise ratio: 69dB (25°C) typical.
Signal-to-noise and distortion: 67dB (25°C) typical.
Output configuration: 8 channels with a separate D/A converter for each channel provided by two quad serial input DACs. Double buffering allows the simultaneous updating of all channels.
D/A resolution: 16 bits.
Output range: ±10 volts.
Settling time: 10μS (100kHz).
I/O configuration: 16 bi-directional I/O channels, individually configured.
I/O range: 5V TTL.
Output type: Open collector type with open drain outputs.
Pull-up resistor: Digital I/O lines are pulled high via a 4.75k ohm resistor to +5 volts.
Acromag AXM I/O modules plug into a PMC or XMC FPGA module’s front mezzanine for additional I/O lines. Analog and digital I/O AXM modules are sold separately.
Size: 12.7 mm high x 42.1 mm deep x 74.0 mm wide (0.500 inches x 1.659 inches x 2.913 inches).
The AXM-A75 exceeds the allowable mezzanine envelope as defined in IEEE 1386-2001 and may not be compatible with all PMC/XMC carriers. See user manual for details.
Stacking height: 5.0 mm (0.315 in).
Weight: 41.3 g (1.46 oz).
Connectors: I/O: 68-pin VHDCI receptacle. Mezzanine: High-speed 150-pin header.
Operating temperature: -40 to 85°C.
Storage temperature: -55 to 125°C.
Relative humidity: 5 to 95% non-condensing.
+3.3V: 39mA typical, 50mA maximum.
+5V: 54mA typical, 65mA maximum.
+12V: 103mA typical, 115mA maximum.
–12V: 92mA typical, 115mA maximum.
MTBF: Contact the factory.
Electromagnetic Compatibility (EMC): Minimum immunity per European Norm EN61000-6-2:2005.
Electrostatic Discharge (ESD) Immunity: 4KV direct contact and 8KV air-discharge to the enclosure port per IEC61000-4-2.
Radiated Field Immunity (RFI): 10V/m, 80 to 1000MHz AM; 3V/m, 1.4 to 2.0GHz; 1V/m, 2.0 to 2.7GHz, per IEC61000 4 3.
Electrical Fast Transient Immunity (EFT): 2KV to power, and 1KV to signal I/O per IEC61000-4-4.
Conducted RF Immunity (CRFI): 10Vrms, 150KHz to 80MHz, per IEC61000-4-6.
Surge Immunity: 0.5KV to power and 1KV to signal per IEC61000-4-5.
Emissions: Per European Norm EN61000-6-4:2007.
Radiated Frequency Emissions: 30 to 1000MHz per CISPR16 Class A.
Features & Benefits
• 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
• Operating temperature: -40 to 85°C