Difference between revisions of "SU710"

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(Created page with "SU710 pin table (direction shown for the SU board!) power in +5V 2 1 +5V in power LVTTL in DATA1<0> 4 3 DATA1<1> in...")
 
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(16 intermediate revisions by the same user not shown)
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= Description =
 +
 +
Dual channel 10/12/14-Bit Digital to analog converter. As DAC was used the DAC2904 from Texas Instruments. It can operate with high update rates of up to 125MSPS. Each DAC has a high-impedance differential-current output suitable for single-ended or differential analog-output configurations.
 +
 +
The SU710 can be used as voltage or current driver. As current driver the DAC2904 can drive 50 Ohm loads with up to 20 mA. To convert the current output to voltage an LMH6702 was used for each channel. This buffer convert the 0-20mA current to a differential output voltage, maximal +/-2V by HiZ or +/-1V by 50 Ohm.
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 +
There are 4 hardware version, the version 0 is only a prototype. The other versions are compatible, the differences are layout improvements.
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= Block Diagram =
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== Version 3 ==
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[[File:SU710_block_diagram.png]]
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= Front panel =
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== Version 3 ==
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[[File:SU710_Front_panel.png]]
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{| border="1" class="wikitable"
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|+ Front panel connectors and controls
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! scope="col" | Pos (top view)
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! scope="col" | Name
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! scope="col" | Type
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! scope="col" | Qty.
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! scope="col" | Dir.
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! scope="col" | Function
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|-
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|1 LEFT
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|Analog output
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|LEMO connector
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|1x
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|output
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|DAC current output negative Iout- channel 1
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|-
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|2 LEFT
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|Analog output
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|LEMO connector
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|1x
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|output
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|DAC current output positive Iout+ or DAC output in voltage mode channel 1
 +
 +
|-
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|1 RIGHT
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|Analog output
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|LEMO connector
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|1x
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|output
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|DAC current output negative Iout- channel 2
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|-
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|2 RIGHT
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|Analog output
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|LEMO connector
 +
|1x
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|output
 +
|DAC current output positive Iout+ or DAC output in voltage mode channel 2
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|}
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= Back Connector =
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== Version 3 ==
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 +
 
SU710 pin table (direction shown for the SU board!)
 
SU710 pin table (direction shown for the SU board!)
  
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     NC    -              - 34  33 -              -      NC
 
     NC    -              - 34  33 -              -      NC
 
   power    in            GND 36  35 GND            in    power
 
   power    in            GND 36  35 GND            in    power
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 +
= Power consumption =
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== Version 2 ==
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+5V -> 170 mA
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 +
= Measurement =
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 +
Voltage output with 1M Ohm input impedance
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 +
[[File:SU710_mess_1.png|400px]]
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Voltage output with 1M Ohm input impedance (Zoom)
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[[File:SU710_mess_2.png|400px]]
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Voltage output with 50 Ohm input impedance
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[[File:SU710_mess_3.png|400px]]
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Voltage output with 50 Ohm input impedance (Zoom)
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[[File:SU710_mess_4.png|400px]]

Latest revision as of 15:58, 12 September 2014

Description

Dual channel 10/12/14-Bit Digital to analog converter. As DAC was used the DAC2904 from Texas Instruments. It can operate with high update rates of up to 125MSPS. Each DAC has a high-impedance differential-current output suitable for single-ended or differential analog-output configurations.

The SU710 can be used as voltage or current driver. As current driver the DAC2904 can drive 50 Ohm loads with up to 20 mA. To convert the current output to voltage an LMH6702 was used for each channel. This buffer convert the 0-20mA current to a differential output voltage, maximal +/-2V by HiZ or +/-1V by 50 Ohm.

There are 4 hardware version, the version 0 is only a prototype. The other versions are compatible, the differences are layout improvements.

Block Diagram

Version 3

SU710 block diagram.png

Front panel

Version 3

SU710 Front panel.png

Front panel connectors and controls
Pos (top view) Name Type Qty. Dir. Function
1 LEFT Analog output LEMO connector 1x output DAC current output negative Iout- channel 1
2 LEFT Analog output LEMO connector 1x output DAC current output positive Iout+ or DAC output in voltage mode channel 1
1 RIGHT Analog output LEMO connector 1x output DAC current output negative Iout- channel 2
2 RIGHT Analog output LEMO connector 1x output DAC current output positive Iout+ or DAC output in voltage mode channel 2

Back Connector

Version 3

SU710 pin table (direction shown for the SU board!) 


 power    in            +5V  2    1 +5V             in     power
 LVTTL    in       DATA1<0>  4    3 DATA1<1>        in     LVTTL
 LVTTL    in       DATA1<2>  6    5 DATA1<3>        in     LVTTL
 LVTTL    in       DATA1<4>  8    7 DATA1<5>        in     LVTTL
 LVTTL    in       DATA1<6> 10    9 DATA1<7>        in     LVTTL
 LVTTL    in       DATA1<8> 12   11 DATA1<9>        in     LVTTL
 LVTTL    in      DATA1<10> 14   13 DATA1<11>       in     LVTTL
 LVTTL    in      DATA1<12> 16   15 DATA1<13>       in     LVTTL
 LVTTL    in          LOAD2 18   17 LOAD1           in     LVTTL
 LVTTL    in       DATA2<0> 20   19 DATA2<1>        in     LVTTL
 LVTTL    in       DATA2<2> 22   21 DATA2<3>        in     LVTTL
 LVTTL    in       DATA2<4> 24   23 DATA2<5>        in     LVTTL
 LVTTL    in       DATA2<6> 26   25 DATA2<7>        in     LVTTL
 LVTTL    in       DATA2<8> 28   27 DATA2<9>        in     LVTTL
 LVTTL    in      DATA2<10> 30   29 DATA2<11>       in     LVTTL
 LVTTL    in      DATA2<12> 32   31 DATA2<13>       in     LVTTL
    NC     -              - 34   33 -               -      NC
 power    in            GND 36   35 GND             in     power

Power consumption

Version 2

+5V -> 170 mA

Measurement

Voltage output with 1M Ohm input impedance

SU710 mess 1.png

Voltage output with 1M Ohm input impedance (Zoom)

SU710 mess 2.png

Voltage output with 50 Ohm input impedance

SU710 mess 3.png

Voltage output with 50 Ohm input impedance (Zoom)

SU710 mess 4.png

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