Anfatec Instruments AG
Measurement Science and Technology &
Scanning Probe Microscopy

SPM Controller for Developers

    PC based digital dual-core SPM controlling system with
    • 8 channels @ 24 Bit D/A channels
    • 8 channel @ 24 Bit A/D channels
    • LCD displays for four A/D and four D/A channels
    • line sync and image sync output
    • control of up to three stepper motors for the coarse approach
    • 19" rack-mount housing (110 V or 230 V power supply)
    For the coarse approach, we provide many alternative options: slip stick movements, steppers in x- and y-direction, ... 
    Gaming fun with Joystick 3D Control


Each controller includes:

  • modern dual-processor PC in 19” rack server housing with TFT monitor
  • PCI-card interface with SXM-DSP for data exchange between PC and controller & lockin amplifier
  • an open source software under Windows XP Prof., which supplies all basic functions
    for any SPM application but is also suitable for other applications.
  • Manual & Datasheets in English

A/D channels (BNC connectors):
  • input voltages:            -10 V...+10 V
  • resolution(nominally):  24 Bit
  • resolution(@ 160 kHz): 16 Bit
  • integrated adapted anti-aliasing filter
  • only 2 µs latency


D/A channels (BNC connectors):
  • output voltages:           -10 V...+10 V
  • resolution(nominally):   24 Bit
  • spectral noise density:  100 nV/Hz1/2 @ 100 Hz 

digital inputs and outputs:
  • Line -Sync signal & Image-Sync signal
  • more adaptable TTL signals for costumer specific funtions available

motor driver:
  • power supply:            12 V dc
  • power consumption    0.3 A per motor


Selected Features (see also Software):
  • simultaneous acquisition of almost unlimited number of pictures
    (limitation starts for example at 20 pictures with 512 pixel due to the PC)
  • integrated distance control (IP controller) with over 6 different feedback modes
  • slope correction during scan
  • free parameter input during scan
  • 4 different types of spectroscopy (any signal vs. distance, any signal vs voltage, ...)
  • computer controlled coarse positioning and automated approach
  • adapable to almost all hardware due to
    • free scalabity of all channels in physical units
    • offset correction for each hardware channel
    • sign inversion possible
    • relation between hardware channel and name is open
  • additional adjustment for user specific setups:
    • number of steps for stepper motor approach,
    • delays and repeat times for slip stick controls


Optional features
  • components for the mechanical movement of tip or sample:
    • Slip-stick power supplies and controls with adjustable parameters or
    • stepper motor drivers for x-, y- and z- direction or
    • three stepper motor drivers for vertical direction (levelling of a SPM head)
  • additional digital LockIn amplifier on the PCI card → dual reference mode available !! NEW !!
  • high-voltage amplifiers