M33 - Mezzanine Card with 8 Analog Outputs, 12 Bits

The mezzanine card M33 is a highly flexible M-Module for analog output signals. The isolated supply voltages can be generated by an on-board DC/DC converter. The output voltage range can be set to 0..10V, -5..+5V or -10..+10V for each channel by software. In addition, the current outputs can be used with 0..20mA or 4..20mA. The output load is driven to ground.

Attention: An external supply is needed with 8 current outputs!

The M33 is based on the M-Module ANSI mezzanine standard. It can be used as an I/O extension in any type of bus system, i.e. CPCI, VME or on any type of stand-alone SBC. Appropriate M-Module carrier cards in 3U, 6U and other formats are available from MEN or other manufacturers.


  • 8 current or voltage outputs
  • 12 bits resolution
  • 10 µs acquisition/conversion time
  • Simultaneous channel update
  • Optical isolation
  • -40 °C to +85 °C versions


D/A Conversion
  • 8 channels
  • 12 bits
  • DAC conversion time 10µs
  • ±5 LSB gain
  • Simultaneous update of all channels possible
Voltage Output
  • Output current: 5mA max.
  • Output linearity: ±1 LSB
  • Accuracy: ±0.2%, ±1 LSB differential
  • Voltage ranges: 0..10V; -5V..+5V; -10V..+10V
  • Voltage output stable up to 1µF capacitive load
Current Output
  • Accuracy: ± 0.5%
  • Current range: 0..20mA; 4..20mA
  • Max. output voltage 10V
  • Load resistance range: 0..500 Ohm
Slew Rates for Voltage Output
  • 0V..+10V mode: switch from 0V to +10V; slew rate (SR) = 4V/µs
  • -5V..+5V mode: switch from -5V to +5V; slew rate (SR) = 4V/µs
  • -10V..+10V mode: switch from -10V to +10V; slew rate (SR) = 4V/µs
Peripheral Connections
  • Via front panel on a shielded 25-pin D-Sub receptacle connector
  • Via carrier board (rear I/O)
M-Module Characteristics
A08, D16, IDENT
Electrical Specifications
  • Isolation voltage: 500V DC
  • Supply voltage/power consumption:
    • +5V (4.85V..5.25V), 480mA quiescent current, 600mA with 8 channels voltage output, 650mA with 4 channels current output
    • External supply voltage +24V: 15.6V..30V
  • MTBF: 200,000h @ 50°C (derived from MIL-HDBK-217F)
Mechanical Specifications
  • Dimensions: conforming to M-Module Standard
  • Weight: 80g
Environmental Specifications
  • Temperature range (operation):
    • 0..+60°C
    • Industrial temperature range on request
    • Airflow: min. 10m³/h
  • Temperature range (storage): -40..+85°C
  • Relative humidity range (operation): max. 95% non-condensing
  • Relative humidity range (storage): max. 95% non-condensing
  • Altitude: -300m to + 3,000m
  • Shock: 15g/11ms
  • Bump: 10g/16ms
  • Vibration (sinusoidal): 2g/10..150Hz
  • Conformal coating on request
PCB manufactured with a flammability rating of 94V-0 by UL recognized manufacturers
Tested according to EN 55022 (radio disturbance), IEC 61000-4-2 (ESD) and IEC 61000-4-4 (burst)
Software Support