SU710

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.

Front panel

Version 3

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 2

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 -> XX mA -5V -> XX mA