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.

Performance Specifications

Analog Input

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.

Analog Output

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).

Digital I/O

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.

Physical

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.

Environmental

Operating temperature: -40 to 85°C. Storage temperature: -55 to 125°C. Relative humidity: 5 to 95% non-condensing. Power +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.  

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