TGDAC4 / TGGALVO (4 Channel DAC card)
CAUTION! On few early prototypes, at startup the card outputs will swing to -10Volts briefly. This may damage instruments that aren't designed to handle negative input.
The TGDAC4 is a versatile card capable of performing many different roles.
With the GALVO_SPIM firmware the card can replace a MicroMirror card(TGMM4). With the DAC outputs, it can connect to a 3rd party Scanner or Galvo amplifier. It presents as a Galvo to Micro-Manager and diSPIM plugin. The Voltage range can be adjusted with Command:PM. All other operation is similar to the MicroMirror Drive Card. The range of internal positions accessed via serial commands is also the same as the MicroMirror card: [-4000, 4000] – not in millivolts like the typical DAC card firmware – which position range then mapped to whichever output voltage range is set using the PM command.
With the PIEZO_DAC firmware the card can replace a Piezo drive card (TGADEPT). With the DAC outputs, it can control a 3rd party piezo amplifier. It presents as a Piezo device to Micro-Manager and diSPIM plugin. The Voltage range can be adjusted with Command:PM. All other operation is similar to the Piezo drive card
With the SIGNAL_DAC firmware the card behaves like a Signal generator. User can set the output voltage directly in millivolts. It can generate periodic waveforms with Single-axis functions and arbitrary waveforms with RING BUFFER Multi-Point Save/Move modules. It presents as a SignalIO device in Micro-Manager( Supported by Micro-Manager version 1.4.23 night builds 9/4/2019 and after). Unlike the other firmware, the voltage range in this firmware is adjusted Command:PR.
Overview
- TGDAC4 has four 12 bit DAC onboard with 4 kHZ refresh rate.
- Has TTL pins connected to TG-1000's backplane, so it can sync with other cards in the TG-1000 controller.
- Multiple DAC output voltage modes are available. Like 0V to 2.048V, 0V to 4.096V, 0V to 10.24V, -1.024V to 1.024V, -2.048V to 2.048V, -5.128V to 5.128V and -10.24V to 10.24V.
- Can output a maximum of 10ma per channel.
- 100 ohm resistor in series at BNC output
- 5th order programmable Bessel filter is present on each DAC channel to filter out DAC aliasing effects. Set with the Command:BACKLASH (B)
- Can be configured to drive a Galvo amplifier, Piezo amplifier and other devices that can accept an analog voltage input.