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

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(→‎+5V supply: added EEPROM)
(→‎-5V supply: converted to new table format)
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=== -5V supply ===
 
=== -5V supply ===
−
Use for:
+
{| cellspacing=3 border=1 |
−
*AD5535 DAC
+
|'''IC Name'''
−
**V- amplifier supply pins
+
|'''Pin Name'''
 +
|'''Tolerance'''
 +
|'''Current Requirements'''
 +
|'''Description'''
 +
|'''Notes'''
 +
|-
 +
| AD5535
 +
| V-
 +
| ±0.25V
 +
| 2.5mA typ, 3.5mA max
 +
| Negative amplifier supply
 +
|
 +
|-
 +
|}
  
 
=== +210V supply ===
 
=== +210V supply ===

Revision as of 14:29, 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

Use for:

  • AD5535 DAC
    • VPP high voltage supply
      • Using this high voltage will allow for large adjustments of the SiPM amplifier bias voltages. Large variations may be necessary because the MATLAB model showed that adjustments between 0 and +50V had no effect on the SiPM.
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