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

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(started adding table with current requirements)
 
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Line 32: Line 32:
 
| ±0.25V
 
| ±0.25V
 
| 2.7mA max operating
 
| 2.7mA max operating
 +
| Analog supply
 
| AVDD can be as low as 2.7V if voltages measured never exceed 2.5V
 
| AVDD can be as low as 2.7V if voltages measured never exceed 2.5V
 
|}
 
|}
Line 68: Line 69:
 
| AD7928
 
| AD7928
 
| VDRIVE
 
| VDRIVE
−
| ??? CMOS logic tolerance
+
| ±0.3V
 
| 200uA
 
| 200uA
 
| Logic output driver
 
| Logic output driver
Line 93: Line 94:
 
| Digital supply pin
 
| 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 ===
 +
{| cellspacing=3 border=1 |
 +
|'''IC Name'''
 +
|'''Pin Name'''
 +
|'''Tolerance'''
 +
|'''Current Requirements'''
 +
|'''Description'''
 +
|'''Notes'''
 +
|-
 +
| AD7928
 +
| REF_IN
 +
| ±1% (±0.025V)
 +
| ±1uA max
 +
| Reference voltage
 +
|
 +
|-
 +
|}
  
−
=== +3.3V supply ===
+
=== ICs requiring +1.2V ===
 +
{| cellspacing=3 border=1 |
 +
|'''IC Name'''
 +
|'''Pin Name'''
 +
|'''Tolerance'''
 +
|'''Current Requirements'''
 +
|'''Description'''
 +
|'''Notes'''
 +
|-
 +
| XC3S50A
 +
| VCCINT
 +
| ±0.06V
 +
| Varies
 +
| Internal logic supply
 +
| FPGA program greatly affects power requirements
 +
|-
 +
|}
  
−
Use for:
+
== -5V supply ==
−
*AD5535 DAC
+
{| cellspacing=3 border=1 |
−
**ANODE
+
|'''IC Name'''
−
***Used for temperature monitoring. Voltage drop across a temperature sensitive diode allows AD7928 to measure internal temperature of AD5535. External resistor on AD5535 CATHODE will help to limit current draw.
+
|'''Pin Name'''
−
**REF_IN supply
+
|'''Tolerance'''
−
***Using +3.3V for REF_IN limits the SiPM amplifier bias voltages to a maximum of 165V. If greater variability is needed (up to +200V max), a separate +4V supply can be used for REF_IN, perhaps taken from the +5V rail via a voltage divider.
+
|'''Current Requirements'''
−
*AD7314 temperature sensor
+
|'''Description'''
−
**VDD supply
+
|'''Notes'''
−
***indicates ±1°C accuracy
+
|-
−
***should make compatible with 3.3V CMOS logic
+
| AD5535
−
*AD7928 ADC
+
| V-
−
**VDRIVE output driver supply
+
| ±0.25V
−
*CP2201 Ethernet
+
| 2.5mA typ, 3.5mA max
−
**AV+ analog supply
+
| Negative amplifier supply
−
**VDD1 digital supply
+
|
−
**VDD2 digital supply
+
|-
−
*FPGA
+
|}
−
**VCCAUX auxiliary supply
 
−
***Can also operate at +2.5V
 
−
**VCCO I/O logic supply
 
−
***Makes it compatible with 3.3V CMOS logic
 
−
***Puts it within acceptable range of voltages for communication with other ICs
 
−
*XCF01S EEPROM
 
−
**VCCINT internal supply
 
−
**VCCO output driver
 
−
***Matches 3.3V I/O on FPGA
 
−
**VCCJ JTAG output driver
 
−
***''Are we using this?''
 
−
*AD5535 DAC
 
−
**V+ amplifier supply pins
 
−
**AVCC analog supply pins
 
−
**DVCC digital supply pins
 
−
*AD7928 ADC
 
−
**AVDD pins
 
−
***indicates measuring range of 0 to 2xREF_IN voltage
 
  
−
=== +1.2V supply ===
+
== +210V supply ==
−
 
+
{| cellspacing=3 border=1 |
−
Use for:
+
|'''IC Name'''
−
*FPGA
+
|'''Pin Name'''
−
**VCCINT internal logic supply
+
|'''Tolerance'''
−
 
+
|'''Current Requirements'''
−
=== +2.5V supply ===
+
|'''Description'''
−
 
+
|'''Notes'''
−
Use for:
+
|-
−
*AD7928 ADC
+
| AD5535
−
**REF_IN reference supply
+
| VPP
−
***Must be accurate to ±1%
+
| 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.
−
=== +5V supply ===
+
|-
−
Use for:[[Image:AD5535 Power Supply Diagram.gif|thumb|Suggested AD5535 power supply connections taken from AD5535 data sheet.]]
+
|}
−
*AD5535 DAC
 
−
**V+ amplifier supply pins
 
−
**AVCC analog supply pins
 
−
**DVCC digital supply pins
 
−
*AD7928 ADC
 
−
**AVDD pins
 
−
***indicates measuring range of 0 to 2xREF_IN voltage
 
−
 
 
−
=== -5V supply ===
 
−
Use for:
 
−
*AD5535 DAC
 
−
**V- amplifier supply pins
 
−
 
 
−
=== +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 [[SiPM_Amplifier#Bias_voltage |no effect]] on the SiPM.
 

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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