VMIVME-3113A Scanning 12-bit Analog to Digital Converter Board with Built in Test

VMIVME-3113A Scanning 12-bit Analog to Digital Converter Board with Built in Test

VMIVME-3113A-100

The VMIVME-3113A 64 Channel Scanning, 12-bit Analgon to Digital Converter (ADC) is one of the highest density/lowest cost per channel boards in the industry.  In addition it contains many features found only on more expensive products.  The AUTOSCANNING MODE, which is automatically entered on power up, performs Analog to Digital A/D conversion on all inputs and stores them in a dedicated channel dual port register.  This allow the user to operate the board without any programming.  The user simply reads the data from the dual port registers which always constraint eh latest converted data for that particular channel.  There are five other ADC operating modes wi=hich allow greater flexibility in controller the ADC operation.

Features

The following brief overview of principal features illustrates the flexibility and performance that is available with the VMIVME-3113A Board:

• 64 differential or single-ended inputs
• Powers up in AUTOSCANNING MODE – no software initialization required
• Continually digitizes all input channels and stores the results in a dedicated channel dual-port register (AUTOSCANNING MODE)
• Six operating modes

• AUTOSCANNING MODE *
• RANDOM POLL MODE
• RANDOM INTERRUPT MODE
• SCANNING POLL MODE
• SCANNING INTERRUPT MODE
• AUTOSCANNING MODE with BIT

* Only for gain = 1 and a minimum of 16 channels.

• VMEbus interrupts may beprogrammed to interrupt upon completion of a single A/D conversion, or upon completion ofa 16 through 64-channel scan (see “Analog-to-Digital (ADC) Control and Timing” on page 26)
• User-programmable interval timer supports scanning of all channels at periodic intervals
• Jumper-programmable gains of 1, 10, 100, 200 and 500
• Selectable A/D ranges of 0 to +10V, ±5V and ±10V
• Low-level and high-level inputs: ±10mV to ±10V
• Optional low pass filter
• Overvoltage protected inputs

• 5 x 106input impedance differential and 2×106input impedance single-ended

• 33 kHz conversion rate at GAIN<500 (23kHz for GAIN = 500)
• Selectable output code: binary, offset binary, two’s complement with sign extension
• Front panel Fail LED is under program control and may be used for any purpose

• Board ID register