Difference between revisions of "SiPM digital control board power supplies"

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As seen in the [[SiPM digital control board netlist]], the ICs on the control board have many different power requirements. This page suggests some compatible voltage supplies that will be necessary on the board. To reduce the number of backplane connections and the number of external supplies needed, some of these supplies might be created using voltage dividers on the control board.  
+
As seen in the [[SiPM digital control board netlist]], the ICs on the control board have many different power requirements. In total there are 6 different voltages required. To minimize the number of actual power supplies needed, however, we plan on supplying only +5V, -5V, and +210V to the board from external power supplies. The other voltages will be created by appropriate voltage regulator ICs on the control board.
  
−
=== +5V supply ===
+
== +5V supply ==
−
Use for:
 
−
*AD5535 DAC
 
−
**V+ amplifier supply pins
 
−
**AV<sub>CC</sub> analog supply pins
 
−
**DV<sub>CC</sub> digital supply pins
 
−
*AD7314 temperature sensor
 
−
**V<sub>DD</sub>
 
−
*AD7928 ADC
 
−
**AV<sub>DD pins</sub>
 
−
***indicates measuring range of 0 to 2xREF_IN voltage
 
  
−
=== +3.3V supply ===
+
The +5V supply is responsible for powering most of the components on the control board. Here is a breakdown of those components by their voltage requirements. Voltages less than +5V will be created using voltage regulators
  
−
=== +2.5V supply ===
+
=== ICs requiring +5V ===
 +
{| cellspacing=3 border=1 |
 +
|'''IC Name'''
 +
|'''Pin Name'''
 +
|'''Tolerance'''
 +
|'''Current Requirements'''
 +
|'''Description'''
 +
|'''Notes'''
 +
|-
 +
| AD5535
 +
| V+
 +
| &plusmn;0.25V
 +
| 0.5mA typ, 1mA max
 +
| Positive amplifier
 +
|
 +
|-
 +
| AD5535
 +
| AVCC
 +
| &plusmn;0.25V
 +
| 15mA typ, 18mA max
 +
| Analog supply
 +
|
 +
|-
 +
| AD7928
 +
| AVDD
 +
| &plusmn;0.25V
 +
| 2.7mA max operating
 +
| Analog supply
 +
| AVDD can be as low as 2.7V if voltages measured never exceed 2.5V
 +
|}
 +
 
 +
=== ICs requiring +3.3V ===
 +
 
 +
{| cellspacing=3 border=1 |
 +
|'''IC Name'''
 +
|'''Pin Name'''
 +
|'''Tolerance'''
 +
|'''Current Requirements'''
 +
|'''Description'''
 +
|'''Notes'''
 +
|-
 +
| AD5535
 +
| ANODE
 +
| large
 +
| set by external resistor
 +
| Temperature sensing diode
 +
| Diode drop varies w/ temperature. Requires external current limiting resistor.
 +
|-
 +
| AD5535
 +
| REF_IN
 +
| ~&plusmn;0.4V
 +
| 1.25uA max
 +
| Reference voltage
 +
| Should be as high as possible but not exceed AVCC-1.15V
 +
|-
 +
| AD7314
 +
| VDD
 +
| &plusmn;0.3V
 +
| 1.2mA typ operating
 +
|
 +
| Indicates &plusmn;1&deg;C precision
 +
|-
 +
| AD7928
 +
| VDRIVE
 +
| &plusmn;0.3V
 +
| 200uA
 +
| Logic output driver
 +
|
 +
|-
 +
| CP2201
 +
| AV+
 +
| &plusmn;0.3V
 +
| ???
 +
| Analog supply pin
 +
|
 +
|-
 +
| CP2201
 +
| VDD1
 +
| &plusmn;0.3V
 +
| 75mA typ, 155mA max operating
 +
| Digital supply pin
 +
|
 +
|-
 +
| CP2201
 +
| VDD2
 +
| &plusmn;0.3V
 +
| 75mA typ, 155mA max operating
 +
| Digital supply pin
 +
|
 +
|-
 +
| XC3S50A
 +
| VCCAUX
 +
| &plusmn;0.3V
 +
| Varies
 +
| Auxiliary power supply
 +
| FPGA program greatly affects power requirements
 +
|-
 +
| XC3S50A
 +
| VCCO
 +
| &plusmn;0.3V
 +
| Varies
 +
| Auxiliary power supply
 +
| FPGA program greatly affects power requirements
 +
|-
 +
| XCF01S
 +
| VCCINT
 +
| &plusmn;0.3V
 +
| 10mA max operating
 +
| Internal supply
 +
|
 +
|-
 +
| XCF01S
 +
| VCCO
 +
| &plusmn;0.3V
 +
| 10mA max operating
 +
| Digital output supply
 +
| Serial mode
 +
|-
 +
|}
 +
 
 +
=== ICs requiring +2.5V ===
 +
{| cellspacing=3 border=1 |
 +
|'''IC Name'''
 +
|'''Pin Name'''
 +
|'''Tolerance'''
 +
|'''Current Requirements'''
 +
|'''Description'''
 +
|'''Notes'''
 +
|-
 +
| AD7928
 +
| REF_IN
 +
| &plusmn;1% (&plusmn;0.025V)
 +
| &plusmn;1uA max
 +
| Reference voltage
 +
|
 +
|-
 +
|}
 +
 
 +
=== ICs requiring +1.2V ===
 +
{| cellspacing=3 border=1 |
 +
|'''IC Name'''
 +
|'''Pin Name'''
 +
|'''Tolerance'''
 +
|'''Current Requirements'''
 +
|'''Description'''
 +
|'''Notes'''
 +
|-
 +
| XC3S50A
 +
| VCCINT
 +
| &plusmn;0.06V
 +
| Varies
 +
| Internal logic supply
 +
| FPGA program greatly affects power requirements
 +
|-
 +
|}
 +
 
 +
== -5V supply ==
 +
{| cellspacing=3 border=1 |
 +
|'''IC Name'''
 +
|'''Pin Name'''
 +
|'''Tolerance'''
 +
|'''Current Requirements'''
 +
|'''Description'''
 +
|'''Notes'''
 +
|-
 +
| AD5535
 +
| V-
 +
| &plusmn;0.25V
 +
| 2.5mA typ, 3.5mA max
 +
| Negative amplifier supply
 +
|
 +
|-
 +
|}
 +
 
 +
== +210V supply ==
 +
{| cellspacing=3 border=1 |
 +
|'''IC Name'''
 +
|'''Pin Name'''
 +
|'''Tolerance'''
 +
|'''Current Requirements'''
 +
|'''Description'''
 +
|'''Notes'''
 +
|-
 +
| AD5535
 +
| VPP
 +
| large
 +
| Depends on SiPM specs
 +
| Supply for SiPM bias voltages
 +
| SiPM bias voltage current requirements are not currently on the wiki. Most likely, this is used more as a reference and less as a power supply.
 +
|-
 +
|}

Latest revision as of 14:47, 26 June 2008

As seen in the SiPM digital control board netlist, the ICs on the control board have many different power requirements. In total there are 6 different voltages required. To minimize the number of actual power supplies needed, however, we plan on supplying only +5V, -5V, and +210V to the board from external power supplies. The other voltages will be created by appropriate voltage regulator ICs on the control board.

+5V supply

The +5V supply is responsible for powering most of the components on the control board. Here is a breakdown of those components by their voltage requirements. Voltages less than +5V will be created using voltage regulators

ICs requiring +5V

IC Name Pin Name Tolerance Current Requirements Description Notes
AD5535 V+ ±0.25V 0.5mA typ, 1mA max Positive amplifier
AD5535 AVCC ±0.25V 15mA typ, 18mA max Analog supply
AD7928 AVDD ±0.25V 2.7mA max operating Analog supply AVDD can be as low as 2.7V if voltages measured never exceed 2.5V

ICs requiring +3.3V

IC Name Pin Name Tolerance Current Requirements Description Notes
AD5535 ANODE large set by external resistor Temperature sensing diode Diode drop varies w/ temperature. Requires external current limiting resistor.
AD5535 REF_IN ~±0.4V 1.25uA max Reference voltage Should be as high as possible but not exceed AVCC-1.15V
AD7314 VDD ±0.3V 1.2mA typ operating Indicates ±1°C precision
AD7928 VDRIVE ±0.3V 200uA Logic output driver
CP2201 AV+ ±0.3V ??? Analog supply pin
CP2201 VDD1 ±0.3V 75mA typ, 155mA max operating Digital supply pin
CP2201 VDD2 ±0.3V 75mA typ, 155mA max operating Digital supply pin
XC3S50A VCCAUX ±0.3V Varies Auxiliary power supply FPGA program greatly affects power requirements
XC3S50A VCCO ±0.3V Varies Auxiliary power supply FPGA program greatly affects power requirements
XCF01S VCCINT ±0.3V 10mA max operating Internal supply
XCF01S VCCO ±0.3V 10mA max operating Digital output supply Serial mode

ICs requiring +2.5V

IC Name Pin Name Tolerance Current Requirements Description Notes
AD7928 REF_IN ±1% (±0.025V) ±1uA max Reference voltage

ICs requiring +1.2V

IC Name Pin Name Tolerance Current Requirements Description Notes
XC3S50A VCCINT ±0.06V Varies Internal logic supply FPGA program greatly affects power requirements

-5V supply

IC Name Pin Name Tolerance Current Requirements Description Notes
AD5535 V- ±0.25V 2.5mA typ, 3.5mA max Negative amplifier supply

+210V supply

IC Name Pin Name Tolerance Current Requirements Description Notes
AD5535 VPP large Depends on SiPM specs Supply for SiPM bias voltages SiPM bias voltage current requirements are not currently on the wiki. Most likely, this is used more as a reference and less as a power supply.
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