# This is a Key In Net List file for # the ADF-2 for the Run IIB Cal Trig # Pedestal DAC's Nets # ------------------------ # Original Rev. 12-MAY-2004 # Most Recent Rev. 28-OCT-2004 # This file includes all the nets that are involved with the 4 # Pedestal DAC chips and their reference Voltage supply. # This file contains the nets for the following components: # # U1451 : U1454 DAC 12 Bit 8 Channels LTC-2620 # U1455 Voltage Reference 4.096 Volt MAX 6141 # C1451 : C1455 0.1 uFd ceramic VCC_ANALOG bypass # C1461 4.7 nFd ceramic DAC_REF bypass # N1451 : N1458 Resistor Array 4x 100 Ohm # R1451 1 k Ohm 0603 resistor DAC CLR_B pull up # R1452 100 Ohm 0603 resistor DAC Serial Data Clock Resistor # R1453 2.15k Ohm 0603 resistor 0.5 ma pull up on DAC Ref. # Nets in the Pedestal DAC circuit # Start with the analog outputs from the 4 DAC chips. This # is a total of 32 analog connections. Each analog output # has a series resistor in it to help keep the DAC output # buffer stable. # DAC #1 (First in the serial data string) NET 'DAC_1_OUT_A' U1451-2 N1451-1 # DAC #1 Output A to series resistor NET 'CH_0_EM_PED' N1451-8 # Pedestal Control to Channel 0 EM NET 'DAC_1_OUT_B' U1451-3 N1451-2 # DAC #1 Output B to series resistor NET 'CH_0_HD_PED' N1451-7 # Pedestal Control to Channel 0 HD NET 'DAC_1_OUT_C' U1451-4 N1451-3 # DAC #1 Output C to series resistor NET 'CH_1_EM_PED' N1451-6 # Pedestal Control to Channel 1 EM NET 'DAC_1_OUT_D' U1451-5 N1451-4 # DAC #1 Output D to series resistor NET 'CH_1_HD_PED' N1451-5 # Pedestal Control to Channel 1 HD NET 'DAC_1_OUT_E' U1451-12 N1452-1 # DAC #1 Output E to series resistor NET 'CH_2_EM_PED' N1452-8 # Pedestal Control to Channel 2 EM NET 'DAC_1_OUT_F' U1451-13 N1452-2 # DAC #1 Output F to series resistor NET 'CH_2_HD_PED' N1452-7 # Pedestal Control to Channel 2 HD NET 'DAC_1_OUT_G' U1451-14 N1452-4 # DAC #1 Output G to series resistor NET 'CH_3_EM_PED' N1452-5 # Pedestal Control to Channel 3 EM NET 'DAC_1_OUT_H' U1451-15 N1452-3 # DAC #1 Output H to series resistor NET 'CH_3_HD_PED' N1452-6 # Pedestal Control to Channel 3 HD # DAC #2 NET 'DAC_2_OUT_A' U1452-2 N1453-1 # DAC #2 Output A to series resistor NET 'CH_4_EM_PED' N1453-8 # Pedestal Control to Channel 4 EM NET 'DAC_2_OUT_B' U1452-3 N1453-2 # DAC #2 Output B to series resistor NET 'CH_4_HD_PED' N1453-7 # Pedestal Control to Channel 4 HD NET 'DAC_2_OUT_C' U1452-4 N1453-3 # DAC #2 Output C to series resistor NET 'CH_5_EM_PED' N1453-6 # Pedestal Control to Channel 5 EM NET 'DAC_2_OUT_D' U1452-5 N1453-4 # DAC #2 Output D to series resistor NET 'CH_5_HD_PED' N1453-5 # Pedestal Control to Channel 5 HD NET 'DAC_2_OUT_E' U1452-12 N1454-1 # DAC #2 Output E to series resistor NET 'CH_6_EM_PED' N1454-8 # Pedestal Control to Channel 6 EM NET 'DAC_2_OUT_F' U1452-13 N1454-2 # DAC #2 Output F to series resistor NET 'CH_6_HD_PED' N1454-7 # Pedestal Control to Channel 6 HD NET 'DAC_2_OUT_G' U1452-14 N1454-4 # DAC #2 Output G to series resistor NET 'CH_7_EM_PED' N1454-5 # Pedestal Control to Channel 7 EM NET 'DAC_2_OUT_H' U1452-15 N1454-3 # DAC #2 Output H to series resistor NET 'CH_7_HD_PED' N1454-6 # Pedestal Control to Channel 7 HD # DAC #3 NET 'DAC_3_OUT_A' U1453-2 N1455-1 # DAC #3 Output A to series resistor NET 'CH_8_EM_PED' N1455-8 # Pedestal Control to Channel 8 EM NET 'DAC_3_OUT_B' U1453-3 N1455-2 # DAC #3 Output B to series resistor NET 'CH_8_HD_PED' N1455-7 # Pedestal Control to Channel 8 HD NET 'DAC_3_OUT_C' U1453-4 N1455-3 # DAC #3 Output C to series resistor NET 'CH_9_EM_PED' N1455-6 # Pedestal Control to Channel 9 EM NET 'DAC_3_OUT_D' U1453-5 N1455-4 # DAC #3 Output D to series resistor NET 'CH_9_HD_PED' N1455-5 # Pedestal Control to Channel 9 HD NET 'DAC_3_OUT_E' U1453-12 N1456-1 # DAC #3 Output E to series resistor NET 'CH_10_EM_PED' N1456-8 # Pedestal Control to Channel 10 EM NET 'DAC_3_OUT_F' U1453-13 N1456-2 # DAC #3 Output F to series resistor NET 'CH_10_HD_PED' N1456-7 # Pedestal Control to Channel 10 HD NET 'DAC_3_OUT_G' U1453-14 N1456-4 # DAC #3 Output G to series resistor NET 'CH_11_EM_PED' N1456-5 # Pedestal Control to Channel 11 EM NET 'DAC_3_OUT_H' U1453-15 N1456-3 # DAC #3 Output H to series resistor NET 'CH_11_HD_PED' N1456-6 # Pedestal Control to Channel 11 HD # DAC #4 (Last in the serial data string) NET 'DAC_4_OUT_A' U1454-2 N1457-1 # DAC #4 Output A to series resistor NET 'CH_12_EM_PED' N1457-8 # Pedestal Control to Channel 12 EM NET 'DAC_4_OUT_B' U1454-3 N1457-2 # DAC #4 Output B to series resistor NET 'CH_12_HD_PED' N1457-7 # Pedestal Control to Channel 12 HD NET 'DAC_4_OUT_C' U1454-4 N1457-3 # DAC #4 Output C to series resistor NET 'CH_13_EM_PED' N1457-6 # Pedestal Control to Channel 13 EM NET 'DAC_4_OUT_D' U1454-5 N1457-4 # DAC #4 Output D to series resistor NET 'CH_13_HD_PED' N1457-5 # Pedestal Control to Channel 13 HD NET 'DAC_4_OUT_E' U1454-12 N1458-1 # DAC #4 Output E to series resistor NET 'CH_14_EM_PED' N1458-8 # Pedestal Control to Channel 14 EM NET 'DAC_4_OUT_F' U1454-13 N1458-2 # DAC #4 Output F to series resistor NET 'CH_14_HD_PED' N1458-7 # Pedestal Control to Channel 14 HD NET 'DAC_4_OUT_G' U1454-14 N1458-4 # DAC #4 Output G to series resistor NET 'CH_15_EM_PED' N1458-5 # Pedestal Control to Channel 15 EM NET 'DAC_4_OUT_H' U1454-15 N1458-3 # DAC #4 Output H to series resistor NET 'CH_15_HD_PED' N1458-6 # Pedestal Control to Channel 15 HD # Now show the Serial Data Path through the 4 DAC chips. NET 'DATA_TO_FIRST_DAC_INPUT' U1451-9 # Serial Data from Board Control PAL NET 'DAC_DATA_1_2' U1451-10 U1452-9 # Serial Data from DAC #1 to DAC #2 NET 'DAC_DATA_2_3' U1452-10 U1453-9 # Serial Data from DAC #2 to DAC #3 NET 'DAC_DATA_3_4' U1453-10 U1454-9 # Serial Data from DAC #3 to DAC #4 NET 'LAST_DAC_OUTPUT_DATA' U1454-10 # Serial Data out of the last DAC # routed back to Board Control PAL # Connect the Serial Data Clock from the Board Control PAL # to the 4 DAC chips. This clock signals has a series termination # resistor R1452 located near the source of this signal. # # First connect the DAC Serial Data Clock signal from the # Board Control PAL to a series resistor for this line R1452. NET 'DAC_SERIAL_DATA_CLOCK' R1452-2 # DAC Data Clock from the BC PAL # Now connect this series resistor to the long trace that takes # the DAC Serial Data Clock down to the 4 Pedestal DAC's. NET 'DAC_DATA_CLOCK_TERM' R1452-1 # DAC Clock Series Resistor NET 'DAC_DATA_CLOCK_TERM' U1451-8 U1452-8 # Serial Data Clock to DAC's NET 'DAC_DATA_CLOCK_TERM' U1453-8 U1454-8 # Serial Data Clock to DAC's # Connect the DAC Chip Select line from the Board Control PAL # to the 4 DAC chips. LTC2620 low active Chip Select and # then Load on the low to high transition. NET 'DAC_CHIP_SELECT_B' U1451-7 U1452-7 # DAC Chip Select NET 'DAC_CHIP_SELECT_B' U1453-7 U1454-7 # DAC Chip Select # Connect the DAC CLR_B pins to a pull up to VCC_ANALOG NET 'DAC_CLR_B' U1451-11 U1452-11 # Connect LDAC_B to Ground NET 'DAC_CLR_B' U1453-11 U1454-11 # Connect LDAC_B to Ground NET 'DAC_CLR_B' R1451-1 # Pull up of of the LTC2620 CLR_B Pin #11 NET 'VCC_ANALOG' R1451-2 # Tie pull up resistor to VCC_ANALOG # Connect the +4.096 Volt Reference Supply to the 4 DAC chips. NET 'DAC_REF' U1451-6 U1452-6 # DAC Reference Input pin NET 'DAC_REF' U1453-6 U1454-6 # DAC Reference Input pin # Bypass the DAC Reference Voltage NET 'DAC_REF' C1461-1 # DAC Reference Voltage bypass capacitor NET 'GROUND' C1461-2 # Bypass capacitor connection to Ground # Connect the Reference Voltage chip. NET 'DAC_REF' U1455-2 # +4.096 Volt output from the Reference chip NET 'VCC_ANALOG' U1455-1 # +5 Volt Analog supply to the Reference chip NET 'GROUND' U1455-3 # Ground connection on the Reference chip NET 'DAC_REF' R1453-1 # 0.5 ma pull up from the DAC_REF to the NET 'VCC_ANALOG' R1453-2 # VCC_ANALOG. R1453 is 2.15 k Ohm. # Connect the power supply to the 4 DAC chips. The DAC's # will run from the +5 Volt Analog power supply net. NET 'VCC_ANALOG' U1451-16 U1452-16 # +5 Volt Analog power NET 'VCC_ANALOG' U1453-16 U1454-16 # +5 Volt Analog power # Connect the Ground pin to the 4 DAC chips. NET 'GROUND' U1451-1 U1452-1 # Ground pin NET 'GROUND' U1453-1 U1454-1 # Ground pin # Connect the power supply bypass capacitors for the # 4 DAC chips and for the Reference Voltage chip. NET 'VCC_ANALOG' C1451-1 C1452-1 C1453-1 C1454-1 C1455-1 NET 'GROUND' C1451-2 C1452-2 C1453-2 C1454-2 C1455-2