====== TGDAC4 / TGGALVO (4 Channel DAC card) ======

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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. 
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[{{ ::tggalvo.jpg?direct&300 |TGGALVO card}}]

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 [[commands:pm|Command:PM]]. All other operation is similar to the [[micromirror|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 [[commands:pm|Command:PM]]. All other operation is similar to the [[piezo_manual|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 [[singleaxis|Single-axis functions]] and arbitrary waveforms with [[ring_buffer|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 [[commands:pr|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 [[commands:backlash|Command:BACKLASH (B)]]
  * Can be configured to drive a Galvo amplifier, Piezo amplifier and other devices that can accept an analog voltage input. 






{{tag>manual tiger micromirror galvo dac piezo}}