Difference between revisions of "SU710"
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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. | 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. | + | 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 = | = Block Diagram = | ||
== Version 3 == | == Version 3 == | ||
| + | |||
| + | [[File:SU710_block_diagram.png]] | ||
= Front panel = | = Front panel = | ||
| Line 13: | Line 17: | ||
== Version 3 == | == Version 3 == | ||
| − | [[File: | + | [[File:SU710_Front_panel.png]] |
{| border="1" class="wikitable" | {| border="1" class="wikitable" | ||
| Line 55: | Line 59: | ||
= Back Connector = | = Back Connector = | ||
| − | == Version | + | == Version 3 == |
| Line 84: | Line 88: | ||
== Version 2 == | == Version 2 == | ||
| − | +5V -> | + | +5V -> 170 mA |
| − | |||
= Measurement = | = Measurement = | ||
| + | Voltage output with 1M Ohm input impedance | ||
| − | [[File:SU710_mess_1.png|400px | + | [[File:SU710_mess_1.png|400px]] |
| + | |||
| + | Voltage output with 1M Ohm input impedance (Zoom) | ||
[[File:SU710_mess_2.png|400px]] | [[File:SU710_mess_2.png|400px]] | ||
| + | |||
| + | Voltage output with 50 Ohm input impedance | ||
[[File:SU710_mess_3.png|400px]] | [[File:SU710_mess_3.png|400px]] | ||
| + | |||
| + | Voltage output with 50 Ohm input impedance (Zoom) | ||
[[File:SU710_mess_4.png|400px]] | [[File:SU710_mess_4.png|400px]] | ||
Latest revision as of 15:58, 12 September 2014
Contents
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
Front panel
Version 3
| 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
Voltage output with 1M Ohm input impedance (Zoom)
Voltage output with 50 Ohm input impedance
Voltage output with 50 Ohm input impedance (Zoom)
