The Thorlabs MDT690 is a 3-axis piezo controller that delivers independent voltage control across X, Y, and Z channels for precision positioning applications. It accepts a 10 V input signal and generates up to 150 V output to drive piezo actuators with nanometer-scale resolution. The device supports manual potentiometer control, external analog voltage input via BNC connectors, and remote operation through RS-232 serial communication.
Technical Specifications
• Channels: 3 independent axes (X, Y, Z)
• Input Voltage: 10 V
• Output Voltage: Up to 150 V selectable (75 V, 100 V, or 150 V via rear-panel switch; ships at 75 V default)
• Voltage Gain: 7.5 V/V (75 V mode), 10 V/V (100 V mode), or 15 V/V (150 V mode)
• Output Impedance: 50 Ω
• External Input Impedance: 10 kΩ
• Internal Amplification: Dual OP27 operational amplifiers and PA41 amplifier per channel
• Power Input: AC line voltage (specifications in user manual)
• Chassis: Benchtop unit
– Key Features
• Three precision 10-turn potentiometers enable manual voltage setting across the full operating range
• Selectable output voltage limits protect piezo elements and optimize performance for specific actuator ratings
• External analog control accepts 0–10 V signals with gain automatically matched to selected output voltage
• RS-232 interface enables remote computer control and overrides manual knob settings when active
• Low-noise output ensures stable positioning critical for microscopy and optical alignment
– Typical Applications
• Precision microscopy stage positioning
• Optical system alignment and beam steering
• Materials science research requiring sub-nanometer adjustments
• Laboratory systems demanding independent 3-axis control
– Compatibility & Integration
Designed for Thorlabs piezo actuators and stacks including PE4, KC1PZ, MDT631, and AE-series elements. Compatible with piezo devices offering up to 1 nm resolution. Supports mixed control modes: manual potentiometer, external analog input, and remote serial commands.
