HOLT HI?8470 User manual

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AN‐8470,Rev.AHOLTINTEGRATEDCIRCUITS3/2/15
1
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23351 Madero,
Mission Viejo, CA
92691. USA.
Tel: + 1 949 859 8800
Fax: + 1 949 859 9643
Email: [email protected]
Web: www.holtic.com
HI‐847016SensorArraywith
ARINC429Output,Ground/Openor
Supply/OpenSensors
EvaluationBoard
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UserGuide
March2,2015
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AN‐8470,Rev.AHOLTINTEGRATEDCIRCUITS3/2/15
2
INTRODUCTION
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TheHoltHI‐8470EvaluationBoarddemonstratesfeaturesoftheHI‐847016SensortoARINC429output
IC.TheboardandtheHI‐8470canberunfromasingle3.3V+/‐5%supplyvoltage.Thedevicehaspreset
internalsensorthresholds,externalthresholdscanalsobesetwithboard‐mountedpotentiometers.The
HI‐8470andEVM(EvaluationModule)requirenosoftwareforcontrol;allfunctionsaresetbyhardware
switches.DIPswitchesconfigurethedeviceanddatainputs.TheEVMisshowninthepicturebelow:
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Thisguidesummarizeshowtogetsetupandrunningquickly.

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AN‐8470,Rev.AHOLTINTEGRATEDCIRCUITS3/2/15
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KITCONTENTS
ThisUserGuide
HI‐8470EvaluationBoard
BoardBlockDiagram

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AN‐8470,Rev.AHOLTINTEGRATEDCIRCUITS3/2/15
4
JumperFunctions
JUMPERDEFAULT DESCRIPTION
VLOGICONLinkforVLOGICsupplytotheLED
VDDONLinkforVDDsupplycurrent(thissuppliestheHI‐8470
converterfortheARINC429outputs)
XTALVDDONSupplies3.3Vtothe1MHzcrystaloscillator
EXTCLKONTouseexternalclock,disconnectlinkandapplyVlogic
levelclocktotheCLKtestpoint
MASTERRESETOFFInplace,thisholdsHI‐8470inreset
TXENBONInplace;pushbutton‘TRANSMIT’ispressedto
transmit.Forcontinuoustransmit,removethelink.
EXTTHSOGONWhennotinplace,theexternalGLO_SETand
GHI_SETpotentiometerssettheGND/Open
thresholds.Withjumperinplace,thedeviceuses
internalthresholds.
EXTTHSVOONWhennotinplace,theexternalVLO_SETand
VHI_SETpotentiometerssettheSupply/Open
thresholds.Withjumperinplace,thedeviceuses
internalthresholds.
J5GNDSensorinputswitch0:7source;GNDwhenswitches
are‘ON’.Innon‐GNDposition,thevoltageonthe
VSENSE0:7testpointisapplied,fortheswitchesin
‘ON’position.
J11GNDSensorinputswitch8:15source;GNDwhenswitches
are‘ON’.Innon‐GNDposition,thevoltageonthe
VSENSE8:15testpointisapplied,forswitchesinthe
‘ON’position.
TST0OFFWheninplace,thesensorinputsareallsettoLow,
andresultsinHighsatthesensoroutputs.
TST1OFFWheninplace,thesensorinputsareallsettoHigh,
andresultsinLowsatthesensoroutputs.WithTST1
andTST0inplace,sensorinputsarealternately1,0

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AN‐8470,Rev.AHOLTINTEGRATEDCIRCUITS3/2/15
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SwitchFunctions
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SWITCHDEFAULTDESCRIPTION
LABEL0:7OFFARINC429labelbits0:7.
ON=‘1’
SPEED&
ARINCBITS
SPEED=ON
ARINC=
OFF
ARINC429speedandARINC429bits9,10,&27:31.
ON=‘1’(seetableonboardforpositions)
TIMER0:7OFFSetsARINC429messagetransmissiontimer.
ON=‘1’
SEL0:7OFFSetssensortypeforSI0:7.
OFF=GND/Open
ON=Supply/Open
SEL8:15OFFSetssensortypeforSI8:15.
OFF=GND/Open
ON=Supply/Open
SENSOR
0:7
ONSetsstateofsensorinputs0:7stimuli.
ONcorrespondstoGNDorSupply.
OFFcorrespondstoOpenstate.
SENSOR
8:15
ONAsabove,setsstateofsensorinputs8:15.
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AN‐8470,Rev.AHOLTINTEGRATEDCIRCUITS3/2/15
6
ConnectorFunctions
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ConnectorPINDESCRIPTION
SENSORIN
0:7
1to8
9
Sensorinputs;Sensor0:7→Pins1:8
GND
SENSORIN
8:15
1to8
9
Sensorinputs;Sensor8:15→Pins1:8
GND
SENSOR
OUT0:7
1to8
9
Sensoroutputs;Sensor0:7→Pins1:8
GND
SENSOR
OUT8:15
1to8
9
Sensoroutputs;Sensor8:15→Pins1:8
GND
BoardSetUp
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1. Makesurethelinkandswitchpositionsareaslistedinthetablesabove.Connecta3.3V
supplytotheVlogictestpoint.TheVDDlinkconnectspowerfromVLogictotheHI‐8470VDD
pin,whichsuppliestheinternalconverter.TheVlogicjumpersuppliesonlytheLED.
2. Tomeasurethedevice’sVlogicsupplycurrent;removetheVlogicGNDjumperandconnect
anammeteracrossthejumperpins.Thismeasuresonlythedevicecurrentandnottheother
circuitryontheboard.TomeasureVddcurrent,removetheVddjumperandconnectthe
ammeteracrossthejumperpins.RemovetheXTALVDDlink;thecurrentmeasuredwillbe
forthedevice‘unclocked’.Tomeasurethedeviceclockedcurrentconsumption,anexternal
1MHzclockshouldbeused,connectedtotheCLKtestpoint,afterremovingtheEXTCLKlink.

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AN‐8470,Rev.AHOLTINTEGRATEDCIRCUITS3/2/15
7
ARINC429OutputTesting
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1. ThedevicetransmitsthesensordatatotheARINC429outputwhentheTXENBis
switchedhigh.TogeneratejustoneARINC429word,presstheTransmitbutton.To
enablecontinuousARINC429transmission,removetheTXENBlink.Beforetestingensure
theswitchesandlinksareinthedefaultstatesshowninprevioustables,thensetLabel
Switch#8toa‘1’andTimerSwitch#1to‘1’.
2. EnablecontinuousARINC429transmissionbyremovingtheTXENBlink.Connectan
oscilloscopetotheARINC429outputs.Forbestresults,usedifferentialmode.Jumper
TST0forcesallthesensorinputsto‘0’,thisforcesthesensoroutputstoa‘1’.Observethe
ARINC429outputwaveform.Itshouldlooksimilartothewaveformshownbelow:
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3. NowlinkjumperTST1only,forcingthesensorinputstoall1’s.Theoutputpatternforthe
datashouldbeall0’sasshownbelow:

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AN‐8470,Rev.AHOLTINTEGRATEDCIRCUITS3/2/15
8
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4. NowlinkjumperTST1andTST0,forcingthesensorinputstoacontinuouslyalternating
01.Theoutputpatternforthedatashouldbe1010101010101010beasshownbelow:
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5. ReplaceTXENBlink.PressTransmit,onlyoneARINC429wordistransmitted.Changethe
Speedswitchto‘0’,thewaveform,shouldchangeto12kbpsrateasshownbelow:

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AN‐8470,Rev.AHOLTINTEGRATEDCIRCUITS3/2/15
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6. Setspeedswitchbackto‘1’.TheTIMERswitchallowsforchangingthetransmitrepetition
rate.Tousethisfeature,removetheTXENBlinktoenablecontinuoustransmission.
Ensurethetimerswitchissetto‘10000000’;onewordwillbetransmittedevery10ms.
Observethisontheoscilloscope;itshouldlooklikethepicturebelow:
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AN‐8470,Rev.AHOLTINTEGRATEDCIRCUITS3/2/15
10
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7. RemovejumpersTST0andTST1.UsetheSpeedandARINC429bitsswitchtotoggleARINC
429outputbits9,10and27to31,seetableontheboardforswitchpositions.Checkthe
correspondingbitchangesontheARINC429output.
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SensorInputandOutputTesting
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1. RemovejumpersTST0andTST1.LeavetheTXENBlinkoff.Setuptheboardindefault
state,thesensorsareinGND/OpenstateandinputstoswitchedtoGND(ON).Now
changealltheSensorinputswitchesto‘OFF’,theoutputwaveformshouldshowtheall‘1s’
pattern,shownearlierinthisdocument.SwitchSensorinput0to‘ON’(GND).TheARINC
429outputshouldchangetotheonebelow,withthechangedsensoroutputstate
transmittedonasa‘1’onbit11.
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2. Setallthesensorinputswitchesto‘ON’(GND),alltheARINC429dataoutputs(bits11:26)
shouldchangetoa‘1’.ThiscanalsobecheckedontheconnectorsSENSOROUT0:7and
8:15.

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AN‐8470,Rev.AHOLTINTEGRATEDCIRCUITS3/2/15
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3. AsimilartestcanbedonewiththesensorsinSupply/Openmode.Inthismode,the
internalthresholdsareVTHImin=15.5VandVTHLOmax=11V.Setallthe‘SensorType
Select’switchesto‘1’.PutJ5andJ11inthenon‐GNDposition.Connecta15.5Vsupplyon
theVSense0:7andVSense8:15terminals.Theguaranteedswitchingthresholdof15.5Vis
beingappliedtotheinput,withallthesensorinputswitches‘ON’,allsensoroutputs
shouldbea‘0’.
4. Lowertheinputvoltageto11V,thisistheguaranteedlowswitchingthreshold,allthe
sensorsoutputsshouldnowhavechangedtoa‘1’.ThiscanbeobservedontheARINC429
outputorontheSensorOutpins.
5. Tochangethethresholds,removetheEXTTHSOGandEXTTHVOjumpers.External
thresholdscannowbeappliedusingthepotentiometersVR1toVR4.Connectavoltmeter
totheterminalabovethepotentiometer,adjustthepotentiometertosetthethreshold
voltage.Notethatthresholdsetis10xthevoltageonthetestpoint.Atypicalsetof
thresholdsettingsisshowninthetablebelow:

TESTPOINTVOLTAGETHRESHOLD(X10)
THSLOGO0.454.5
THSHIGO1.0510.5
THSLOVO0.66.0
THSHIVO1.212.0
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6. Totesttheexternalthresholds,thesensorinputswitchesshouldbesetto‘Open’andthe
sensorinputvoltageappliedtotheSensorInputpin(seetableinnextsection).

ConnectinganexternalARINC429driver
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Theconnector‘EXTARINC429DRIVER’,providesCMOSlogicleveloutputsforconnectingan
externalARINC429driver.Inthiscase,theVDDsupplyisstillrequiredontheboardasthis
suppliestheCrystalOscillatorandtheCleanSwitchcircuit.HoweverifpinoneoftheXTALVDD
linkandpin1ofTXENBlinkareconnectedtoanexternal3.3V,thenVDDlinkcanberemoved.
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AN‐8470,Rev.AHOLTINTEGRATEDCIRCUITS3/2/15
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Connectingexternalsensors

Toconnectanexternalsensor,firstverifythecorrespondingsensorDIPswitchisthe‘OPEN’
state.ThesensorwirescanbeconnectedtotheboardonthepinheadersSensorIn0:7and
8:15.Seetablebelow.
WhenusingGND/Opensensors,theVWETterminalmustbeusedtopullupthesensorsinputs.
WithVWETat28VandVLOGICat3.3V,thewettingcurrentwillbeapproximately1mA.If
additionalwettingcurrentisrequired,connectanexternalresistorfromVWETtothesenseline.
Seedatasheetformoreguidanceonwettingcurrenttablesandadjustment.

Pin
Number
SensorNumber
0:78:15
108
219
3210
4311
5412
6513
7614
8715
9GNDGND
Connectionpinsforexternalsensors



AN‐8470,Rev.AHOLTINTEGRATEDCIRCUITS3/2/15
13
TP5
VLOGIC
3
214
ON (CLOSED)
85 6 7
SW3
SEL 0:7
VLOGIC
VSENSE 8:15
TP11
3 214
ON (CLOSED)
85 6 7
SW1
R23
100k
12
3
4
5
6
7
8
9
+V
R20 0R R21 0R R18 0R R19 0R R17 0R R16 0R R22
0R
R15 0R
C11
10nF
R28
39
XTAL VDD
LINK
SENSOR OUT 0:7
THSHIVO
R3
100k
12
3 4 5 6 7 8 9
TP3
GND
+
C5
47uF, 50V
TP4
C8 .1uF, 50V
C8 and C21
MOUNT NEAR U1
TP17
R2
100k
12
3
4
5
6
7
8
9TP6
+
C4
47uF, 16V
VHI_SET
VR1
20k
R1
3.6K
SEL 8:15
VDD
C9
100pF
VLOGIC CAN BE 3.3 TO 5V
HOWEVER IF 5V IS USED J1 MUST
BE LEFT OFF AND 3.3V SUPPLIED
TO VDD TERMINAL.
J10 1 2
-V
+
C6
47uF,50V
J1
1 2
J12
1 2
R29
0R
Title
Size Document Number Rev
Date: Sheet of
<Doc>
HI-8470 DISCRETE TO ARINC DRIVER EVALUATION BOARD
B
11Tuesday, April 30, 2013
VLOGIC
R27
100k
1 2
3
4
5
6
7
8
9
TP18
SENSOR OUT 8:15
3
214
ON (CLOSED)
85 6 7
SW5
J6
1 2
+V
U1
HI-8470 100 PQFP
VWET
1
SI0
2
SI1
3
SI2
4
SI3
5
SI4
6
SI5
7
SI6
8
SI7
9
SI8
10
SI9
11
SI10
12
SI12
14
SI13
15
SI14
16
SI15
17
GND
18
TST0
19
TST1
20
S00
21
S01
22
S02
23
S03
24
S04
25
S05
26
S06
27
S07
28
S010
31
S011
32
S012
33
S013
34
S014
35
S015
36
SPEED
37
MRN
38
CLKIN
39
LBL0
40
LBL1
41
LBL2
42
LBL3
43
LBL4
44
LBL5
45
LBL6
46
LBL7
47
BIT9
48
BIT10
49
BIT27
50
BIT28 51
BIT29 52
BIT30 53
BIT31 54
TMR7 55
TMR6 56
TMR5 57
TMR4 58
TMR3 59
TMR2 60
TMR1 61
TMR0 62
TXBDIG 63
TXADIG 64
GNDB 65
TXB 66
TXA 67
GNDA 68
TXENB 69
SEL0 70
SEL1 71
SEL2 72
SEL3 73
SEL4 74
SI11
13
S08
29
S09
30
SEL5 75
SEL6 76 SEL7 77 SEL8 78 SEL9 79
SEL10 80 SEL11 81 SEL12 82 SEL13 83 SEL14 84 SEL15 85
V- 86
CN+ 87
CN- 88
GND 89
VDD 90
CP- 91
CP+ 92
V+ 93
EXTTHSOG 94
TSHLO0G 95 THSHIOG 96
EXTTHSVO 97
THSLOVO 98
THSHIVO 99
VLOGIC 100
R30
0R
R24
100k
1 2
3 4 5 6 7 8 9
SPEED & ARINC BITS
SW4
TRANSMIT (SPST-NC)
J9 1 2
J14
1 2 3 4 5 6 7 8 9
R13
10K
3
214
ON (CLOSED)
85 6 7
SW6
J19
1 2
D1
POWER
R26
680
C20
.1uF, 50V
J16
LED
1 2
+
C19
47uF,50V
NEAR U1
VLOGIC
TP12
TP14
GND
J15
1 2 3 4 5 6 7 8 9
THSLOVO
U2
MAX6816
GND 1
IN 2 OUT
3
VDD
4
VLOGIC
-V
LABEL 0:7
THSHIGO
TP15
3
214
ON (CLOSED)
85 6 7
SW2
3 214
ON (CLOSED)
85 6 7
SW8
TP2
GND
Not Inserted
VLOGICVLOGIC
MASTER RESET
LINK TO HOLD
IN RESET
VDD
3 214
ON (CLOSED)
85 6 7
SW7
SENSORs 0:7
VDD
R10 0R
R9 0R R8 0R R7 0R R6 0R R5 0R
J4
1 2 3 4 5 6 7 8 9
J5
VSENSE 0:7
1 2 3
C1
47uF,16V,MLC
TP7
SENSE 0:7
R11
0R
R4 0R
J3
1 2
THSLOGO
C7
4.7uF,16V,MLC
C21
.1uF, 50V
C16
10nF
+ C17
47uF 50V
J2
1 2
VLOGIC
TP8
+ C10
47uF, 16V
VLO_SET
R12
3.6K
VR2
20k
VDD
C12
100pF
THSLOVO
J8
EXT ARINC DRV A
1
2
3
C3
47uF,16V,MLC
-V
TP1
GND
EXTERNAL CLOCK
J17
1 2
Y1
OSC, 4 PIN, 1MHz 3.3V
E/D
1
GND
2OUT 3
VDD 4
+V
C2
4.7uF,16V,MLC
SENSORS 8:15
J13
1 2 3 4 5 6 7 8 9
J18 12
CLK
TP19
CLK
TP10
+
C13
47uF, 16V
GHI_SET
R14
3.6K
VR3
20k
TP16
GND
VDD
C14
100pF
GLO_SET +
C15
47uF, 16V
TP13 VR4
20k
R25
3.6K
VDD
C18
100pF
THSHIGO
THSLOGO
TIMER 0:7
J7
ARINC OUT
1
2
3
J11
VSENSE 8:15
1 2 3
TP9
THSHIVO



AN‐8470,Rev.AHOLTINTEGRATEDCIRCUITS3/2/15
14
Appendix1LightningProtection

ThesenseinputsandARINC429driveroutputs(TXAandTXB)areprotectedtoRTCA/DO‐160G,
Section22Level3PinInjectionTestWaveformSetA(3&4),SetB(3&5A)andSetZ(3&5B)
withouttheuseofanyexternalcomponents.Formoredetailspleaseseethelatestdatasheet
andApplicationNoteAN‐305.
Theleveloflightningprotectioncanbeincreasedbyusingexternalcomponents,pleaseseethe
ApplicationNotesavailableonHolt’swebsitehttp://www.holtic.com.
ThelayoutofaHI‐8470boardshouldalwayshavelowconductivitypathsfromthedevice
power/groundpintotherelevantpowerorgroundorigin.Thesepathsshouldavoidproximity
tosenseorothersignaltraces;thisappliestoaboveandbelowaswellashorizontally.Itisgood
practicetohaveapowerandground‘moat’beneaththesenselinetopreventdisturbanceon
theselinesduringa‘lightning’event.



AN‐8470,Rev.AHOLTINTEGRATEDCIRCUITS3/2/15
15
BillofMaterials:HI‐8470EvaluationBoard

Item Qty Description Reference DigiKey Mfr P/N
11 PCB, Bare, Eval Board N/A -------- JetTech 35005
24 Capacitor, Cer 0.1uF 20% 50V Z5U
0805 C20, C8, C21, C11 399-1176-1-ND Kemet C0805C104M5UACTU
31 Capacitor, Cer 0.01uF 20% 50V Z5U
0805 C16 399-1160-1-ND Kemet C0805C103M5RACTU
44 Capacitor, Cer 100pF 20% 50V Z5U
0805 C9, C12, C14, C18 399-1122-1-ND Kemet C0805C101J5GACTU
52 Cap Cer 4.7uF 16V X7R 20% 1210
SMD C2, C7 587-1392-1-ND Taiyo EMK325B7475KN-T
62 Cap Cer 47uF 10V X7R 20% 1210 SMD C1, C3 587-2783-1-ND Taiyo LMK325B7476MM-
TR
74 Cap Alum 47uF 50V 20% SMD C4, C10, C13, C15 PCE4222CT-ND Panasonic EEE-
HA1H470XPS
84 Cap Alum 47uF 16V 20% SMD C5, C6, C17, C19 PCE3889CT-ND Panasonic EEE-
1CA470SP
94
Header, Male 1x9, .1" Pitch J4, J13, J14, J15 S1012E-09-ND Sullins S1012E-09-ND
10 4 Header, Male 1x3, .1" Pitch J5, J11, J7, J8 S1012E-03-ND Sullins S1012E-03-ND
11 10 Header, Male 1x2, .1" Pitch J1, J2, J3, J6, J16,
J18, J19, J9, J10,
J12
S1012E-02-ND Sullins S1012E-02-ND
12 1 LED Green 0805 D1 160-1179-1-ND LiteOn LTST-C170GKT
13 18 Resistor, 0 5% 1/8W 0805 R4-R11, R15-R22,
R29, R30 P0.0ACT-ND Panasonic ERJ- 6GEY0R00V
14 1 Resistor, 39 5% 1/8W 0805 R28 P39ACT-ND Panasonic ERJ-
6GEYJ390V
15 1 Resistor, 680 5% 1/8W 0805 R26 P680ACT-ND Panasonic ERJ-
6GEYJ681V
16 4 Resistor, 3.6K 5% 1/8W 0805 R1, R12, R14, R25 P3.6KACT-ND Panasonic ERJ-
6GEYJ362V
17 1 Resistor, 10K 5% 1/8W 0805 R13 P10KACT-ND Panasonic ERJ-
6GEYJ103V
18 5 Resistor Network, 100K 5% 9 Res
10SIP R27, R23, R24, R3, R2 770-101-R100KP- ND CTS 770101104P
19 4 Resistor Trim Pot 20K, 0.5W, 20T, Th. VR1, VR2, VR3, VR4 490-2881-ND Murata PV36W203C01B00
20 7 Switch Tape Seal 8Pos SMD SW1, SW2, SW3,
SW5, SW6, SW7,
SW8
CT2198MST-ND CTS 219-8MST

Continuedonnextpage.


AN‐8470,Rev.AHOLTINTEGRATEDCIRCUITS3/2/15
16
BillofMaterials(cont.):HI‐8470EvaluationBoard
Item Qty Description Reference DigiKey Mfr P/N
21
1 Osc 1.MHz 3.3V, 5x7mm SMD Y1 631-1122-1-ND FOX FXO-HC735-1
22
1 Switch Tactile SPST-NC 0.05A, 50V SW4 EG4588CT-ND E-Switch TL3310AF120QG
23 1
Test Point, Red Insulator, 0.062" hole TP19 5010K-ND Keystone 5010
24
5 Test Point, Black Insulator, 0.062" hole TP1, TP14, TP2,
TP16, TP4 5011K-ND Keystone 5011
25
2 Test Point, White Insulator, 0.062" hole TP15, TP3 5012K-ND Keystone 5012
26
2 Test Point, Orange Insulator, 0.062"
hole TP12, TP18 5013K-ND Keystone 5013
27
7 Test Point, Yellow Insulator, 0.062" hole TP17, TP6, TP8,
TP10, TP13, TP7,
TP9
5014K-ND Keystone 5014
28 1 HI-8470PQI - 100PQFP U1 HOLT IC Holt IC
29
1 IC Debouncer SW SGL SOT143-4 U2 Max6816EUS Maxim MAX6816EUS+T
30
4 Stand-off, Threaded #4-40F, 1/2" Long
Round Any 3480K-ND Keystone 3480
31
4 Machine Screw, #4-40 x 1/4" Any H343-ND PMS 440 0031 PH
32
4 Lock Washer, Int.Tooth #4-40 Any H236-ND B&F Intlwz 004



AN‐8470,Rev.AHOLTINTEGRATEDCIRCUITS3/2/15
17
REVISIONHISTORY

Revision Date Description of Change
AN-8470, Rev. New 5-3-13 New
AN-8470, Rev. A 3-2-15 Add BOM. Make minor corrections.
