DL-DB

DL-DB DarkLight distribution board

Links

• https://edev-group.triumf.ca/hw/exp/dark-light/dark-light-distribution-board/rev0 - DL-DB project
• https://edev-group.triumf.ca/hw/exp/dark-light/dark-light-scintillator/rev1 - DL-Sipm project, Rev1
• https://edev-group.triumf.ca/hw/exp/dark-light/dark-light-scintillator/rev0 - DL-Sipm project, Rev0
• https://edev-group.triumf.ca/hw/exp/dark-light/darklight-asd-adapter/rev0 - DL to ALPHA-g ASD adaptor

Schematics

• File:SCH-DL-DB-Rev0-A.PDF DL-DB Rev0
• File:SCH-DL-Scint-Rev0-B.PDF DL-SiPM Rev0
• File:SCH-DL-Scint-Rev1-A.PDF Dl-SiPM Rev1

DL-DB power

• +Vin -> F1 -> +Vin_F
• -Vin -> ???
• +Vin_F -> U3 ADP7105ACPZ-R2 -> +5V0
• +5V0 -> U4 MCP1754ST-3302E/MB -> +3.3V
• +5V0 -> U18 -> VREF-TMP
• +Vin_F -> U14 ADP7105ACPZ-R2 -> Vdd_TP +3.3V

DL-DB i2c

• U1 - 0x48 - DAC7678SPW - (ADDR->GND) - HVset1..8
• U2 - 0x4A - DAC7678SPW - (ADDR->+5V0) - HVset9..16
• U5 - 0x21 - TCA9535PWR - (A0=+3V3,A1=A2=GND) - PWR_EN1..16
• U6 - 0x26 - TCA9535PWR - (A0=GND,A1=A2=+3V3) - I2C_EN1..16
• U9 - 0x69 - MCP3422A1TE/SN - Vbias voltage (R5/R6 divider +HVEXT to GND) and current (R4 to +HV_CS)
• U19 - 0x49 - ADS7828E/250 - (A0->+5V0, A1->GND) - TMP1..8
• U20 - 0x4B - ADS7828E/250 - (A0->+5V0, A1->+5V0) - TMP9..16

root@cb02:~# i2cdetect -y -r 1
     0  1  2  3  4  5  6  7  8  9  a  b  c  d  e  f
00:          -- -- -- -- -- -- -- -- -- -- -- -- -- 
10: -- -- -- -- -- -- -- -- -- -- -- -- -- -- -- -- 
20: -- -- -- -- -- -- -- -- -- -- -- -- -- -- -- -- 
30: -- -- -- -- -- -- -- -- -- -- -- -- -- -- -- -- 
40: -- -- -- -- -- -- -- 47 48 49 4a 4b -- -- -- -- 
50: -- -- -- -- -- -- -- -- -- -- -- -- -- -- -- -- 
60: -- -- -- -- -- -- -- -- -- 69 -- -- -- -- -- -- 
70: -- -- -- -- -- -- -- --                         
root@cb02:~# 

DL-DB Temperature monitor

• U19, U20. 12-bit 8 channel ADC.
• i2c addr 73=0x49, 75=0x4B. {10010,A1,A0,RW}
• adc_config = 0b10000100

// cmd bits are: SD, c2,c1,c0, Pd1,Pd0, x, x
//                1   x  x  x   0   1   0   0
// SD=1=single ended, PD1=0=int ref off, PD0=1=ADC ON, c210 = channel addr

• to read: write command with c0,c1,c2, read 2 bytes of ADC data
• calibration

float R25 = 5000;  // R25 = 5kohm
unsigned int temp_cnt = read 2 bytes of ADC data from i2c
float RT = temp_cnt*R25/(4096-temp_cnt);
TCH = 28.54 * pow((RT/R25),3) - 158.5 * pow((RT/R25),2) + 474.8 * (RT/R25) - 319.85; // in degC

DL-DB HV Vbias

• U7 - AD8219BRMZ - vbias current sensor, voltage across R4=1ohm
• U9 - MCP3422A1TE/SN - 18 bit ADC, 2 channels: CH1 from U7, CH2 from voltage divider +HVEXT to GND R5=1Mohm, R6=20kohm
• U12-1..16 - OPA455IDDAR - HVset, HV_CS, HVout
• U9 i2c {1101,A2,A1,A0,RW} for the 3422A1, A2=0,A1=0,A0=1, so {1101001,RW}, 0x69
• U1, U2 - DAC7678SPW - 12-bit 8-channel DAC, i2c address {1001,A2,A1,A0,RW}
• U1 addr -> GND -> {1001,000,RW} -> 0x48
• U2 addr -> +5V0 -> {1001,010,RW} -> 0x4A

DL-SiPM i2c and power control

• i2c address {0100,A2,A1,A0,RW}
• U5 - power enable, A0=+3V3,A1=A2=GND, {0100001,RW}, 0x21
• U6 - i2c enable, A0=GND,A1=A2=+3V3, {0100110,RW}, 0x26

DL-SiPM i2c

AAA