Article
500 ppm LCR Meter (3)
Part 3: PCBs, BOMs, assembly, calibration
After the flood of theory, design considerations and software descriptions in the first two installments we are ready to tackle practical matters like PCBs, BOMs, assembly and calibration.
Component list
COMPONENT LIST
Main circuit
Resistors
(default: SMD 0805 1%)
R1,R16,R17,R28 = 10Ohm
R2,R34 = 820kOhm
R3,R5,R11,R13 = 8.2kOhm
R4,R10,R47,R55,R56,R71,R72,R78,R81,R82,R94,R95 = 10kOhm
R6, R58, R59 = 1.8kOhm
R7,R100 = 5kOhm trimpot (Vishay-Sfernice TS53YJ502MR10)
R8, R60, R62 = 16kOhm
R9,R23,R25,R35,R38,R39,R41,R52,R68,R69,R70,R87,R88,R96 = 56Ohm
R12,R14 = 5.6 kOhm
R15,R97 = NC (not fitted)
R18 = 10kOhm 0.05% 10ppm (Panasonic ERA6ARW103V)
R19 = 1Ohm
R20 = 1kOhm 0.05% 10 ppm (Panasonic ERA6ARW102V)
R21 = 100Ohm 0.05% 5ppm (Vishay-Dale TNPU0805100RAZEN00)
R22 = 100kOhm 0.05% 10ppm (Panasonic ERA6ARW104V)
R24,R26,R27,R29,R33,R36,R37,R40,R44,R57,R64 = 100Ohm
R30,R61,R76,R77,R80,R101 = 20kOhm
R31 = 750Ohm
R32,R42,R49,R66,R93 = 100kOhm
R43,R84,R85,R86,R89 = 2.2Ohm
R45,R73 = 39kOhm
R46,R90,R91 = 680Ohm
R48,R51,R74 = 4.7kOhm
R50 = 0Ohm
R53,R65 = 470Ohm
R54 = 1kOhm
R63,R98 = 1.6kOhm
R67 = 62Ohm
R75 = 5kOhm trimpot (Bourns 3266W-1-502LF)
R79 = 4.3kOhm
R81 = 7.5kOhm
R83 = 30kOhm
R92 = 430Ohm
R99 = 2kOhm
Capacitors
(default: SMD 0805)
C1,C2,C4,C10,C11,C12,C20,C26,C27, C28,C29,C31,C33,C34,C35,C36, C37,C40,C41,C43,C44,C45,C46, C47,C48,C49,C50,C51,C53,C54, C61,C63,C65,C78,C80,C86,C87,C88 = 100nF 10% X7R 25V
C3,C9,C62,C64,C90 = 1µF 10% 25 V X7R
C5,C13,C18 = 15nF 5% 50V NP0, SMD 1206
C6, C7, C14, C15, C16, C56 = 47nF 5% 50V NP0, SMD 1206
C8, C73, C89 = 1nF 5% 50V NP0
C17,C21,C23,C55,C60 = NC (not fitted)
C19,C25 = 150pF 5% 50V NPO
C22,C52,C58,C59 = 1.5nF 5% 50V NPO
C24,C32,C69,C72,C74,C75,C81,C85 = 2.2µF 10% 16V X7R
C30,C57 = 4.7nF 5% 50V NP0
C38,C39,C83,C84 = 33pF 5% NP0
C42,C70 = 33µF 6.3V, tantalum case A (Vishay Sprague 293D336X96R3A2TE3)
C66,C71, C82 = 10nF 10% 50V X7R
C67,C77, C79 = 4.7µF 10% 10V X5R
C68,C76 = 470µF 6.3 V tantalum case D (Kemet T495D477K006ATE100)
Inductors
L1 = 20µH dual coupled (Bourns PM3602-20-RC)
L2, L3 = ferrite bead, SMD 0805 (Murata BLM21PG221SN1D)
Semiconductors
(default: SMD)
D1,D2,D3,D4,D5 = BAV199 (SOT23)
D6 = LED, green, 3mm, leaded, horizontal mounting (Dialight 551-0207F)
D7 = MBR0520 (SOD123)
D8, D9 = LED, red, SMD 0805 (e.g. Kingbright KP-2012SURC)
D10 = BAT54A (SOT23)
U1 = OPA725AIDBV (SOT23-5) (TI)
U2 = MAX7404CSA (SOIC-8) (Maxim)
U3 = 74HCT4052D (SOIC-16)
U4, U20 = TLC2274AID (SOIC-14 (TI)
U5 = INA128U (SOIC-8) (TI)
U6,U11,U14 = OPA365DBV (SOT23-5) (TI)
U7 = PGA103U (SOIC-8) (TI)
U8 = 74HCT4053D (SOIC-16)
U9 = C8051F061-GQ (TQFP-64) (Silicon Laboratories)
U10 = LM4040D25IDBZ (SOT23) (TI)
U12 = DAC8811CDGK (MSOP-8) (TI)
U13 = SN74LVC2G53DCT (SM-8) (TI)
U15 = REG102GA-A (SOT223-5) (TI)
U16 = LT1611CS5 (SOT23-5) (Linear Technologies)
U17 = TPS72325DBV (SOT23-5) (TI)
U18 = TLV70030DDC (SOT23-5) (TI)
U19 = FT232RL (SSOP-28) (FTDI)
Miscellaneous
Y1 = 24MHz quartz crystal, fundamental resonance (e.g. Euroquartz 24.000MHz HC49/4H/30/50/40+85/18pF/ATF)
SW1 = rocker switch (RS Components 4US1R1020M6RNS, code 734-6934)
J1,J2,J3,J6,J7,J8,J17,J21,J22 = 2-pin pinheader, 0.1’’ pitch (2.54mm)
J4,J5,J14 = 1-pin pinheader, bent (see text)
J10,J11, J12,J13 = BNC socket, horizontal mounting, isolated (e.g. TE Connectivity 1-1337543-0)
J15 = 10-pin pinheader HE10 (e.g. Multicomp MC9A12-1034)
J16 = 14-pin pinheader HE10 (e.g. Multicomp MC9A12-1434)
J17 = 2-pin pinheader, 0.1’’ (2.54 mm), bent (see text)
J19 = USB connector, type B, horizontal (e.g. TE Connectivity 292304-1)
K1 = pushbutton (Omron B3F-10xx series)
PCB, bare, # 110758-1
alternatively, preassembled module # 110758-91
Case (Hammond 1455L1601 + machining + lettering)
Screws, nuts, spacers, misc. hardware
COMPONENT LIST
Display / Keyboard module
Resistors
(SMD 0805 1%)
R1,R2,R3,R4,R10,R11 = 4.7kOhm
R5,R6,R7,R9 = 56Ohm
R8 = 1kOhm
Capacitors
(SMD 0805)
C1,C2,C3,C4,C5,C6,C7,C8,C9,C10 = 1µF 10% 25V X7R
Semiconductors
D1,D2,D3,D4 = BAT54A (SOT23)
D5 = LED, green, 3mm, leaded, (e.g. Kingbright L-424GDT)
Q1,Q2 = N-channel MOSFET (SOT23) (e.g. Fairchild FDV303N)
Miscellaneous
U1 = 64128M-FC-BW-3 graphic display (Displaytech)
J1 = 14-way HE10 transition header, max. height 5.4mm (Harting 09 18 114 9622)
K1,K2,K3,K4,K5 = pushbutton (Multicomp TS0B22)
14-way flatcable connector (e.g. Multicomp MC6FD014-30P1)
14-way flatcable, length (4 in. / 10cm) (3M 3365-14)
PCB, bare, Elektor #110758-2
Alternatively, preassembled module, Elektor # 110758-92
Main circuit
Resistors
(default: SMD 0805 1%)
R1,R16,R17,R28 = 10Ohm
R2,R34 = 820kOhm
R3,R5,R11,R13 = 8.2kOhm
R4,R10,R47,R55,R56,R71,R72,R78,R81,R82,R94,R95 = 10kOhm
R6, R58, R59 = 1.8kOhm
R7,R100 = 5kOhm trimpot (Vishay-Sfernice TS53YJ502MR10)
R8, R60, R62 = 16kOhm
R9,R23,R25,R35,R38,R39,R41,R52,R68,R69,R70,R87,R88,R96 = 56Ohm
R12,R14 = 5.6 kOhm
R15,R97 = NC (not fitted)
R18 = 10kOhm 0.05% 10ppm (Panasonic ERA6ARW103V)
R19 = 1Ohm
R20 = 1kOhm 0.05% 10 ppm (Panasonic ERA6ARW102V)
R21 = 100Ohm 0.05% 5ppm (Vishay-Dale TNPU0805100RAZEN00)
R22 = 100kOhm 0.05% 10ppm (Panasonic ERA6ARW104V)
R24,R26,R27,R29,R33,R36,R37,R40,R44,R57,R64 = 100Ohm
R30,R61,R76,R77,R80,R101 = 20kOhm
R31 = 750Ohm
R32,R42,R49,R66,R93 = 100kOhm
R43,R84,R85,R86,R89 = 2.2Ohm
R45,R73 = 39kOhm
R46,R90,R91 = 680Ohm
R48,R51,R74 = 4.7kOhm
R50 = 0Ohm
R53,R65 = 470Ohm
R54 = 1kOhm
R63,R98 = 1.6kOhm
R67 = 62Ohm
R75 = 5kOhm trimpot (Bourns 3266W-1-502LF)
R79 = 4.3kOhm
R81 = 7.5kOhm
R83 = 30kOhm
R92 = 430Ohm
R99 = 2kOhm
Capacitors
(default: SMD 0805)
C1,C2,C4,C10,C11,C12,C20,C26,C27, C28,C29,C31,C33,C34,C35,C36, C37,C40,C41,C43,C44,C45,C46, C47,C48,C49,C50,C51,C53,C54, C61,C63,C65,C78,C80,C86,C87,C88 = 100nF 10% X7R 25V
C3,C9,C62,C64,C90 = 1µF 10% 25 V X7R
C5,C13,C18 = 15nF 5% 50V NP0, SMD 1206
C6, C7, C14, C15, C16, C56 = 47nF 5% 50V NP0, SMD 1206
C8, C73, C89 = 1nF 5% 50V NP0
C17,C21,C23,C55,C60 = NC (not fitted)
C19,C25 = 150pF 5% 50V NPO
C22,C52,C58,C59 = 1.5nF 5% 50V NPO
C24,C32,C69,C72,C74,C75,C81,C85 = 2.2µF 10% 16V X7R
C30,C57 = 4.7nF 5% 50V NP0
C38,C39,C83,C84 = 33pF 5% NP0
C42,C70 = 33µF 6.3V, tantalum case A (Vishay Sprague 293D336X96R3A2TE3)
C66,C71, C82 = 10nF 10% 50V X7R
C67,C77, C79 = 4.7µF 10% 10V X5R
C68,C76 = 470µF 6.3 V tantalum case D (Kemet T495D477K006ATE100)
Inductors
L1 = 20µH dual coupled (Bourns PM3602-20-RC)
L2, L3 = ferrite bead, SMD 0805 (Murata BLM21PG221SN1D)
Semiconductors
(default: SMD)
D1,D2,D3,D4,D5 = BAV199 (SOT23)
D6 = LED, green, 3mm, leaded, horizontal mounting (Dialight 551-0207F)
D7 = MBR0520 (SOD123)
D8, D9 = LED, red, SMD 0805 (e.g. Kingbright KP-2012SURC)
D10 = BAT54A (SOT23)
U1 = OPA725AIDBV (SOT23-5) (TI)
U2 = MAX7404CSA (SOIC-8) (Maxim)
U3 = 74HCT4052D (SOIC-16)
U4, U20 = TLC2274AID (SOIC-14 (TI)
U5 = INA128U (SOIC-8) (TI)
U6,U11,U14 = OPA365DBV (SOT23-5) (TI)
U7 = PGA103U (SOIC-8) (TI)
U8 = 74HCT4053D (SOIC-16)
U9 = C8051F061-GQ (TQFP-64) (Silicon Laboratories)
U10 = LM4040D25IDBZ (SOT23) (TI)
U12 = DAC8811CDGK (MSOP-8) (TI)
U13 = SN74LVC2G53DCT (SM-8) (TI)
U15 = REG102GA-A (SOT223-5) (TI)
U16 = LT1611CS5 (SOT23-5) (Linear Technologies)
U17 = TPS72325DBV (SOT23-5) (TI)
U18 = TLV70030DDC (SOT23-5) (TI)
U19 = FT232RL (SSOP-28) (FTDI)
Miscellaneous
Y1 = 24MHz quartz crystal, fundamental resonance (e.g. Euroquartz 24.000MHz HC49/4H/30/50/40+85/18pF/ATF)
SW1 = rocker switch (RS Components 4US1R1020M6RNS, code 734-6934)
J1,J2,J3,J6,J7,J8,J17,J21,J22 = 2-pin pinheader, 0.1’’ pitch (2.54mm)
J4,J5,J14 = 1-pin pinheader, bent (see text)
J10,J11, J12,J13 = BNC socket, horizontal mounting, isolated (e.g. TE Connectivity 1-1337543-0)
J15 = 10-pin pinheader HE10 (e.g. Multicomp MC9A12-1034)
J16 = 14-pin pinheader HE10 (e.g. Multicomp MC9A12-1434)
J17 = 2-pin pinheader, 0.1’’ (2.54 mm), bent (see text)
J19 = USB connector, type B, horizontal (e.g. TE Connectivity 292304-1)
K1 = pushbutton (Omron B3F-10xx series)
PCB, bare, # 110758-1
alternatively, preassembled module # 110758-91
Case (Hammond 1455L1601 + machining + lettering)
Screws, nuts, spacers, misc. hardware
COMPONENT LIST
Display / Keyboard module
Resistors
(SMD 0805 1%)
R1,R2,R3,R4,R10,R11 = 4.7kOhm
R5,R6,R7,R9 = 56Ohm
R8 = 1kOhm
Capacitors
(SMD 0805)
C1,C2,C3,C4,C5,C6,C7,C8,C9,C10 = 1µF 10% 25V X7R
Semiconductors
D1,D2,D3,D4 = BAT54A (SOT23)
D5 = LED, green, 3mm, leaded, (e.g. Kingbright L-424GDT)
Q1,Q2 = N-channel MOSFET (SOT23) (e.g. Fairchild FDV303N)
Miscellaneous
U1 = 64128M-FC-BW-3 graphic display (Displaytech)
J1 = 14-way HE10 transition header, max. height 5.4mm (Harting 09 18 114 9622)
K1,K2,K3,K4,K5 = pushbutton (Multicomp TS0B22)
14-way flatcable connector (e.g. Multicomp MC6FD014-30P1)
14-way flatcable, length (4 in. / 10cm) (3M 3365-14)
PCB, bare, Elektor #110758-2
Alternatively, preassembled module, Elektor # 110758-92
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