Hardware/Parallelport/DAC2

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(Created page with "{{TOC right}} == 2-Channel DAC board == The board bases on 2 [http://www.analog.com/static/imported-files/data_sheets/AD5543_5553.pdf AD5543] 16-bit DACs. The DACs have a ser...")
 
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{{TOC right}}
 
{{TOC right}}
== 2-Channel DAC board ==
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== Two-Channel DAC board ==
  
 
The board bases on 2 [http://www.analog.com/static/imported-files/data_sheets/AD5543_5553.pdf AD5543] 16-bit DACs.
 
The board bases on 2 [http://www.analog.com/static/imported-files/data_sheets/AD5543_5553.pdf AD5543] 16-bit DACs.
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! Version || Photo || Schematics || Description
 
! Version || Photo || Schematics || Description
 
|-
 
|-
| V1.0 || TBD || TBD || 2-Channel DAC parallelport board
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| V1.0 ||[[File:PP_HEB_DAC.jpg|200px|HEB DAC]] || [[Media:PP_HEB_DAC_schematic.pdf|HEB DAC Schematic PDF]] || 2-Channel DAC parallelport board
 
|}
 
|}
  
 
The DACs have a current output and a first op-amp converts the currents to voltages.
 
The DACs have a current output and a first op-amp converts the currents to voltages.
 
A second op-amp allows to set an offset and a gain with the help of resistors placed in through-hole pins.
 
A second op-amp allows to set an offset and a gain with the help of resistors placed in through-hole pins.
 +
 +
The DACs are supplied with +5 V.
 +
The op-amps are supplied with ±12 V.
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These power supplies are generated from the parallel port connector's 3.3 V.
  
 
== Test ==
 
== Test ==
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* Check the raw DAC voltage on the left side of each leftmost resistor.
 
* Check the raw DAC voltage on the left side of each leftmost resistor.
 
* Check the voltage outputs of the board.
 
* Check the voltage outputs of the board.
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 +
[[File:PP_HEB_DAC_test.jpg|600px|Test of the PP HEB DAC Board]]
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[[Category:Hardware]] [[Category:Parallelport]]
 
[[Category:Hardware]] [[Category:Parallelport]]

Latest revision as of 11:10, 12 June 2013

Contents

Two-Channel DAC board

The board bases on 2 AD5543 16-bit DACs. The DACs have a serial input (CS, CLK, SDI) and can be operated up to 3 MHz sampling rate with 0.5 µs settling time.

Version Photo Schematics Description
V1.0 HEB DAC HEB DAC Schematic PDF 2-Channel DAC parallelport board

The DACs have a current output and a first op-amp converts the currents to voltages. A second op-amp allows to set an offset and a gain with the help of resistors placed in through-hole pins.

The DACs are supplied with +5 V. The op-amps are supplied with ±12 V. These power supplies are generated from the parallel port connector's 3.3 V.

Test

Connect the board to the top connector of an FPGA development board. Connect a 4-pieces rotary switch board to the lower connector of the FPGA board. Download the sinewave design.

  • Check the power supplies: +12 V, -12 V, +5 V.
  • Check the reference voltage: 10 V on pin 6 of the large chip in the middle of the 2 DAC rails.
  • Check the digital serial signals on the FPGA board connector (pins TBD).
  • Check the raw DAC voltage on the left side of each leftmost resistor.
  • Check the voltage outputs of the board.

Test of the PP HEB DAC Board

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