Ametek / VTI Instruments / VXI Technology VM3618 8-Channel Isolated 16-bit D/A Converter

The Ametek/VTI Instruments/VXI Technology VM3618 is an 8-channel, isolated, 16-bit digital-to-analog converter designed for high-resolution analog output applications within VXIbus systems. This module offers significant flexibility, allowing each of its eight channels to be individually programmed for unique output ranges, supporting both voltage and current outputs. The VM3618 is part of the VMIP™ (VXI Modular Instrumentation Platform) family, enabling it to be combined with other VMIP modules for high-density configurations within a single VXIbus card slot. This platform approach leverages the full capabilities of the VXIbus, providing a powerful and modular instrumentation solution.

Technical Specifications * Channels: 8 independent, isolated 16-bit Digital-to-Analog Converters (DACs)

• Resolution: 16 bits, 15 bits monotonic
• Isolation: 100 V rms, 150 V dc/ac peak
• Output Ranges (Voltage Mode): * ±10 V * ±16 V * 0 V to 20 V * 0 V to 32 V
• Output Ranges (Current Mode): * ±20 mA
• Maximum Output Current: * 20 mA per channel (normal operation) * 50 mA per channel (short circuit)
• Output Voltage Compliance: 12 V maximum at ±20 mA output
• Slew Rate: 3 V/µS (with 20 mA load)
• Gain Error: ±0.015% of setting + 0.003%/°C
• Offset Error: ±2 LSB + 0.2 LSB/°C
• Ripple and Noise: < 2 µA rms (20 Hz-300 kHz, 250 Ω load)
• Settling Time: 20 µs to 0.1% of specified value
• Conversion Rate: > 100,000 changes per second (up to 10 µs with direct register access)

Electrical Characteristics * Output Current (Short Circuit): Continuous duration

Interfaces * Programming: * VXIbus Interface * SCPI Compatible * Word Serial Protocol (Message-based Data Access) * Direct Register-based Data Access (Offers fastest throughput) * Pseudo-register-based Data Access

• Triggering: * VXI TTL trigger bus support * Programmable trigger output upon DAC update * Eight available trigger lines can be specified or disabled * Trigger upon receipt of a word serial command
• Scan Lists: Supports 8 different scan lists, each up to 512 entries long, to ease testing
• Calibration: * On-board storage of calibration constants * Constants determined during calibration and can be queried or altered via word serial command * Allows pre-calculation of data for direct register access programming
• User Connector: Standard

Physical Characteristics * Form Factor: VMIP™ module, designed to fit within a VM9000 carrier or VXIbus C-size slot

• Density: Up to 24 isolated D/A converters per single VXIbus C-size slot when combined with other VMIP modules

Compatibility * VXIbus System: Part of the VMIP™ family, designed to integrate with other VMIP™ instruments

• Carrier Requirement: Requires a VM9000 carrier for integration into a VXIbus system
• VXIplug&play Drivers: Provided for ease of programming

Programming and Operation * Output Configuration: Multiple channels can be connected in series to provide extended voltage ranges, e.g., channels 1 and 2 can provide a single output of (0-64) V or ±32 V

• Data Access: Supports message-based data access via word serial commands and direct register access for high-speed data transfer.
• Scan Lists: Facilitates testing by allowing pre-defined sequences of output values to be loaded and executed.
• Triggering Options: Extensive triggering capabilities allow synchronization with other system events.
• Calibration Constants: Stored on-board and accessible for precision control. Why Choose Aumictech for Ametek / VTI Instruments / VXI Technology VM3618? At Aumictech, we specialize in supplying high-end VXIbus instrumentation equipment. Whether you need precise 8-channel isolated 16-bit D/A conversion, flexible voltage and current output configurations, or seamless integration into your VXIbus system, our team ensures the Ametek/VTI Instruments/VXI Technology VM3618 delivers maximum performance for your application.