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MAX31785 Evaluation Kit Evaluates: MAX31785
General DescriptionThe MAX31785 evaluation kit (EV kit) provides the hardware and software graphical user interface (GUI) necessary to evaluate the MAX31785 6-channel intelli-gent fan controller. The EV kit includes a MAX31785ETL+ installed, as well as a 12V fan and USB-to-I2C module to communicate with the PC.
EV Kit Contents AssembledcircuitboardincludingMAX31785ETL+ DS3900module 12Vfan Mini-USBcable
Features EasyEvaluationoftheMAX31785 USBHIDinterface WindowsXP®-andWindows®7-Compatible
Software RoHSCompliant ProvenPCBLayout FullyAssembledandTested
19-6535; Rev 0; 12/12
Ordering Information appears at end of data sheet.
EV Kit Photo
Windows and Windows XP are registered trademarks and registered service marks of Microsoft Corporation.
Maxim Integrated 2
MAX31785 Evaluation Kit Evaluates: MAX31785
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Component List
*EP = Exposed pad.
DESIGNATION QTY DESCRIPTIONB1 1 Yellowbananajack
B2, B4 2 Blackbananajacks
B3 1 Redbananajack
C001,C101,C201,C301,C401,C501 6 2.2nF,X7Rceramic
capacitors(0805)
C004,C1,C2,C8,C11, C12, C15, C21 c8 100nF,X7Rceramic
capacitors(0805)
C002,C003,C102,C103,C202,C203,C302,C303,C402,C403,C502,C503
0 Donotpopulate,ceramiccapacitors(0805)
C3,C5,C10,C16,C18,C20 6 10nF,X7Rceramiccapacitors
(0805)
C4,C6,C17,C19 4 1µF,X7Rceramiccapacitors(0805)
C7, C13 2 10µF,X7Rceramiccapacitors(0805)
C9 1 47µFtantalumcapacitor(Case C)
C14 0 Donotpopulate,tantalumcapacitor (Case C)
D1,D2 2 RedLEDs(1206)
J1,P001,P1, P101,P201,P301,
P401,P5018 2-pin headers, 2.54mm pitch
P002C,P002O,P102,P202,P302,
P402,P5027 4-pin headers, 2.54mm pitch
Q001,Q101,Q201,Q301,Q401,Q501 6 npntransistors(3SOT23)
FairchildMMBT3904
R001,R002, R16–R21,R101,R102,R201,R202,R301,R302,R401,R402,R501,R502
18 0Ω±1%resistors(0805)
R003,R006,R103,R106,R203,R206,R303,R306,R403,R406,R503,R506
12 10Ω±1%resistors(0805)
R004,R6,R7,R22,R104,R204,R304,
R404,R5040 Donotpopulate,resistors
(0805)
DESIGNATION QTY DESCRIPTION
R005C,R005O,R105,R205,R305,
R405,R5057 1kΩ±1%resistors(0805)
R007,R4,R5,R8,R11–R15,R107,R207,R307, R407,R507
14 4.7kΩ±1%resistors(0805)
R1–R3,R23,R24 5 100kΩ±1%resistors(0805)
R9,R10 2 1.2kΩ±1%resistors(0805)
S1 1 Single-polepushbuttonswitch
TP001–TP004,TP1–TP9,
TP101–TP104,TP201–TP204,TP301–TP304,TP401–TP404,TP501–TP504
33 Whitetestpoints
TP13, TP27 2 Redtestpoints
TP14–TP21,TP23,TP24, TP26 11 Black test points
TP25 1 Yellow test point
U1A 16-channel intelligent fan controller(40TQFN-EP*)Maxim MAX31785ETL+
U1B 0
Notinstalled,6-channelintelligent fan controller (40TQFN-EP*)Maxim MAX31785ETL+
U001 1Low-voltage, single-supply, SPDTswitch(6SC706)MaximMAX4599EXT-T
U2 1 USB communications moduleMaximDS3900
U3 1Digitaltemperaturesensor (8SO,150mil)MaximDS75LVS+
— 1 PCB: MAX31785 EV KIT
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MAX31785 Evaluation Kit Evaluates: MAX31785
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MAX31785 EV Kit Files
Quick StartRequired Equipment MAX31785EVkit WindowsXPorWindows7PC USBport Mini-USBcable(included) EVkithardware(included) 12Vfan(included) 3.3V(100mA)DCpowersupply 12V(500mA)DCpowersupply(ifonlyoperatingthe
one provided fan)Note: In the following sections, software-related items are identifiedbybolding.Textinboldreferstoitemsdirectlyfrom the install or EV kit software. Text in bold and underlinedreferstoitemsfromtheWindowsoperatingsystem.
ProcedureTheEVkitisfullyassembledandtested.Followthestepsbelowtoverifyboardoperation:1) EnsurethatjumperJ1ispopulatedandtheDS3900
module (U2) is connected.2) Connect a 12V fan to one of the six channel fan
headers.Forthefansupplied,makesuretoconnectFANGNDtotheblackwireandVFANtotheredwire.
3) Set the EV kit hardware on a nonconductive surface to ensure that nothing on the PCB is shorted to the workspace.
4) Attach theGND first (black connector) to the groundjack of the 3.3V supply and connect the FANGND(blackconnector)tothegroundjackofthe+12Vsupply.
5) Connect the FANGND and GND nodes together.There isnotaconnectionbetween thesenodesonthe PCB.
6) Connect the +3.3V (red connector) and +12V (yellow connector) power supplies and turn the power on. Eithersupplycanbeturnedonfirst(nosequencingisrequired).
7) Prior to starting the GUI, connect the EV kit hardware toaPCusingthesuppliedmini-USBcable,orequiv-alent.TheCOMLED(D2)ontheDS3900shouldbered and slowly flash orange.
8) Windows should automatically begin installing thenecessary device driver. The USB interface of the EVkithardwareisconfiguredasanHIDdeviceandtherefore does not require a unique/custom devicedriver. Once the driver installation is complete, aWindows message appears near the System Iconmenu, indicating that the hardware is ready to use. DonotattempttoruntheGUIpriortothismessage.If you do, then you must close the application and restartitoncethedriverinstallationiscomplete.OnsomeversionsofWindows,administratorprivilegesmayberequiredtoinstalltheUSBdevice.
9) Once the device driver installation is complete,visit www.maximintegrated.com/evkitsoftware to download the latest version of the EV kit software, MAX31785EVKitSoftware.zip. Save the EV kit soft-ware to a temporary folder.
10) Afterthe.EXEfilehasbeenextractedfromtheZIP,double-click to launch the GUI. A message box stating The publisher could not be verified. Are you sure you want to run this software? may appear. If so, click Yes.
11) WhentheGUIappears,thetextatthebottomofthewindow should indicate that the USB is connected. The COM LED (D2) on the DS3900 changes togreen.TheGUI initiallysets theCONTROLpin lowtodisablethefan.
12) TheGUIcannowbeusedtoevaluatetheMAX31785.
Note: The .EXE file is downloaded as a .ZIP file.
FILE DESCRIPTIONMAX31785EVKSoftware.EXE Application program
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Detailed Description of SoftwareGeneral TabThe General tab sheet (Figure 1) displays the statusof all pages and can be read by pressing the Read Once button in theMonitor group box. Start Monitor continuously reads until Stop Monitor is pressed. The values can be displayed inHex or DIRECT format byselecting the appropriate radio button in the Select display section. The Commandsgroupboxallowsusersto read/write to registers that are 0–2 bytes long. First,select an item in the Select a Page drop-down list to write to PAGE (00h). Then, under theSelect or Enter Command drop-down list, either select the command in thedrop-downlistorenterthecommandbyteandpressthe Read button. To write to a register, enter the databyteintheDataeditboxandpressWrite. In the Global Commands groupbox,pressing theSoft Reset buttonresets thedevice by setting a bit inMFR_MODE (D1h)to 1, 0, and then 1 againwithin 8ms.TheHard Reset button resets the device by pulling theRST pin low for 10ms. The FanRunTime Reset, FanPwmAvg Reset, and MFRTimeCnt Reset buttons reset their values bywriting a sequence of all zeros, all ones, and all zeroswithin 8ms. The FanRunTime Reset and FanPwmAvg Reset only reset the MFR_FAN_RUN_TIME (7Fh) andMFR_FAN_PWM_AVG(F8h)valuesforthepageselectedfrom the Select a Page drop-down list. The Clear Faults button sends theCLEAR_FAULTS (03h) command andthe Read Fault Log button writes the fault log to a.TXT file. If the ALERT pin is asserted, an alert indicator appears next to the Alert Responsebuttonandnolongerresponds to its fixed slave address. The Alert Response buttonsendstheARA(19h),waitsforthedevicetoACK,and then reads the fixed slave address. The Set Control radio buttonspull theCONTROLpin either highor low.SettingtheCONTROLpinlowgloballyturnsallfansoff.
PMBusTM TabThe PMBus™ tab sheet (Figure 2) allows the user tochange the slave address and read/write to all PMBuscommands. To change the software slave address, enter the slave address in the Software Slave Address edit box and press the Change button. This only changesthe slave address that the software uses to communicate and does not change the hardware’s slave address. To search forallslaveaddressesavailableon the I2Cbus,press Find. Note: Slave address 34h is the factory- programmed address and should not be selected for communication.Toread/writetoaPMBuscommand,firstselect a page in the Select a Page drop-down list, which writestoPAGE(00h).Thenenterthecommandaddressin the Commandspinboxandselectthenumberofbytesto read/write from theNumber of Data drop-down list. Press Read or enter data in the edit boxes and pressWrite. To read/write more than 16 bytes, click on theWordradiobuttonintheModegroupbox,whichplacestwobytesineachdataboxforamaximumof32bytes.
File TabThe File tabsheet (Figure3) cansave thePMBusset-ting to a file and program the MAX31785 with settings saved in a file. The flashed-stored PMBus settings can besaved toa file in threedifferent formats.TheDump buttonsavesthesettingstoa.TXTfileinatab-delimitedtableformat.TheMachine Code Dumpbuttonsavesthecommands to a .TXT file in a machine-code format. The Intel Hex Dump button generates a .HEX file with theSTORE_DEFAULT_ALL (11h) command placed at theend of the file. To program the device with values saved in a file, press the Fill Devicebuttonandselecta.TXTfilethat was generated using the Dumpbutton.
PMBus is a trademark of SMIF, Inc.
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Figure 1. MAX31785 EV Kit GUI (General Tab)
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Figure 2. MAX31785 EV Kit GUI (PMBus Tab)
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Figure 3. MAX31785 EV Kit GUI (File Tab)
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MAX31785 Evaluation Kit Evaluates: MAX31785
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Detailed Description of HardwareConnecting a FanMount the fan to the PCB with the provided mounting holes to prevent the fan from moving while spinning. To connect4-wirefans,connecttoFANGND,VFAN,TACHX,andPWMX.For3-wirefans,leavePWMXunconnected.FANGNDisatypicalblackwireandVFANisusuallyaredwire on a fan.
UserSupplied Remote Diode or Remote VoltageTo connect a user-supplied external remote diode or remotevoltage,removeresistorsRX01andRX02,whereXisthechannelnumber.Thenconnectthediodeorvolt-agetotheheaderlabeledwithRS+XandRS-X.
UserSupplied DS75LVTouseanoff-boarddigital temperature sensor, connecttheDS75LVdevice(U3)totheMSDA,MSCL,andGNDtest points or use the I2C master access header. The user-suppliedDS75LVaddresspinsshouldbeconfiguredfor temp sensor I2C1,2,or3.Theon-boardDS75LVisconfiguredtobetempsensorI2C0.
UserSupplied I2C InterfaceTo use the device with a user-supplied I2C interface, remove the DS3900 module from the EV kit. Then connectSDA,SCL,andGNDofthemicrocontrollertothetestpointsprovidedontheEVkitboard.
TroubleshootingAll efforts were made to ensure that each EV kit works on thefirsttry,rightout-of-the-box.Intherareoccasionthataproblemissuspected,seeTable2tohelptroubleshootthe issue.
Determine DS3900 Module TypeTheDS3900module has been updated to theDS3900HID(Figure4).IftheDS3900COM(Figure5)isattachedtotheEVkit,downloadtheMAX31785EVKitCOM.ZIPfileavailableatwww.maximintegrated.com/evkitsoftware and follow the Quick Start GuideincludedintheZIPfile.
Table 1. Description of LEDsLED COLOR DESCRIPTION
D1 Red ALERT:Afaultoccurred.Thedevicenolongerrespondstoitsfixedslaveaddress. See the Generaltab(Figure1)toclear.
D2 Red FAULT: A fault occurred. See the Generaltabtoclear.DS3900
D1 Red USB Power Fault: A fault occurred due to overvoltage limit, current limit, or thermal limit.
DS3900D2
Red Communication:Afterthesoftwarehasinitializedthehardware,theLEDflashesredwhenacommand from the PC is received.
Green Initialized:Hardwarehasbeeninitializedbysoftware.
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Table 2. TroubleshootingSYMPTOM CHECK SOLUTION
GUI indicates USB not Connected
DS3900HIDmoduleTheDS3900modulehasbeenupdated.GotoDetermine DS3900 module Type to see if the correct one is connected.
IstheLEDlabeledD1ontheDS3900red?
If yes, then the electronic fuse is in a fault state. Inspect for electrical shorts on the PCB and make sure that the PCB is not sitting on a conductive surface.
DoestheLEDlabeledD2ontheDS3900turngreenwhentheGUIisrunning?
If not, then exit the GUI and try running it again. If the LEDstilldoesnotturngreen,thenexittheGUIandtryconnectingtheUSBcabletoadifferentUSBportonthePCandwaitforaWindowsmessagethatindicatesthatthehardwareisreadytouse.RuntheGUIagain.
AreanyoftheLEDsilluminated?Ifnot,thenthePCBmaynotbegettingpower.Makesure3.3VisconnectedtotheredbananajackandtheUSBcableisconnectedtoaPC.
GUI indicates Could not communicate with
PMBus. Slave address not recognized.
J1 MakesureJ1ispopulatedwithajumper.
MAX31785 Make sure there is a MAX31785 in the socket or solder to theboard.
Fanwillnotturnon
VFAN Makesurethereis12Vconnectedtotheyellowbananajackifusingthesuppliedfan.
FanheaderMake sure the fan is properly connected to the fan header. FANGNDisablackwireandVFANisaredwireonthefansupplied.
CONTROLpin MakesuretheCONTROLpinishighbyclickingontheHighradiobuttonontheGeneraltab.
FAN_CONFIG_1_2(3Ah) CheckthattheFanEnablebit(bit7)inFAN_CONFIG_1_2is set to 1.
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Figure 4. DS3900 HID Module Figure 5. DS3900 COM Module
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Figure 6a. MAX31785 EV Kit Schematic (Sheet 1 of 3)
P11
P22
P33
MCL
R4
GN
D5
P46
P57
GN
D8
P69
P710
P811
P912
VCC
13G
ND
14P1
0/SC
L15
P11/
SDA
16U
2
DS3
900
C7 10uF
C8 100n
F
B4 GN
D B
AN
AN
A
B33.
3V B
AN
AN
AC1
310
uFC1
210
0nF
C11
100n
FC1
010
nFG
ND
R502
0
R501
0
C501
2.2n
F
11
22
33
44
P502
40M
M F
AN
R507
4.7k
C503
DN
P
R506
10
R504
DN
PC5
02D
NP
R503
10
R505
1k
3.3V
C6 1uF
C5 10nF
C4 1uF
C3 10nF
3.3V
R16
0R1
70
R18
0
R19
0
R20
0
R21
0
R22
DN
P
R15
4.7k
R14
4.7k
R13
4.7k
R12
4.7k
R11
4.7k
R6 DN
P
R7 DN
P
R8 4.7k
R9 1.2k
R10
1.2k
D1
FAU
LTD2
AL
ERT
12
S1 RESE
TC2 10
0nF
R23
100k
R24
100k 3.
3V
R5 4.7k
R4 4.7k
3.3V
MSD
A
MSC
L
SDA
SCL
RST
AL
ERT
FAU
LT
CON
TRO
LTA
CHSE
LA
0
REG
18
REG
25
TACH
0PW
M0
RS+0
RS-0
VSS
TACH
1PW
M1
RS+1
RS-1
TACH
2PW
M2
RS+2
RS-2
TACH
3PW
M3
RS+3
RS-3
TACH
4PW
M4
RS+4
RS-4
TACH
5PW
M5
RS+5
RS-5
SDA
1
SCL
2
O.S
.3
GN
D4
A2
5A
16
A0
7VC
C8
U3
DS7
5LV
R1 100k
R2 100k
R3 100k
3.3V
C1 100n
F
B1
+12/
24/4
8V B
AN
AN
A
FAN
GN
DC1
510
0nF
TP9
TACH
SEL
TACHSEL
TP8
CON
TRO
L
CONTROL
TP7
FAU
LT
FAULT
TP6
AL
ERT
ALERT
TP5
RST RST
TP4
SCL SCL
TP3
SDA SDA
TP30
1TA
CH3
TACH3
TP20
3RS
-2 RS-2
TP20
2PW
M2
PWM2
TP20
1TA
CH2
TACH2
TP10
4RS
+1 RS+1
TP10
3RS
-1 RS-1
TP10
2PW
M1
PWM1
TP10
1TA
CH1
TACH1
TP00
4RS
+0 RS+0
TP00
3RS
-0 RS-0
TP13
VDD VDD
TP50
4RS
+5 RS+5
TP50
3RS
-5 RS-5
TP50
2PW
M5
PWM5
TP50
1TA
CH5
TACH5
TP40
4RS
+4 RS+4
TP40
3RS
-4 RS-4
TP40
2PW
M4
PWM4
TP40
1TA
CH4
TACH4
TP30
4RS
+3 RS+3
TP2
MSC
L
MSCL
TP1
MSD
A
MSDA
TP00
2PW
M0
PWM0
TP00
1TA
CH0
TACH0
TP30
3RS
-3 RS-3
TP30
2PW
M3
PWM3
B2 FAN
GN
D B
AN
AN
A
TP24
GN
D GND
TP23
GN
D GND
TP21
GN
D GND
TP20
GN
D GND
TP19
GN
D GND
TP18
GN
D GND
TP17
GN
D GND
TP16
GN
D GND
TP15
GN
D GND
TP14
GN
D GND
1
23
Q50
1M
MBT
3904
MSD
A14
MSC
L15
SDA
31
SCL
32
RST
13
AL
ERT
38
FAU
LT
34
CON
TRO
L35
A1/
TACH
SEL
37
A0
33
REG
1822
REG
2529
VSS
36VS
S21
VSS
2
VDD
9
RS-5
39RS
+540
PWM
516
TACH
517
TACH
030
PWM
028
RS+0
6
RS-0
7
TACH
127
PWM
126
RS+1
8
RS-1
10
TACH
225
PWM
224
RS+2
11
RS-2
12
TACH
323
PWM
320
RS+3
5
RS-3
4
TACH
419
PWM
418
RS+4
3
RS-4
1
EP41
U1A
MA
X317
85
VFA
N
GN
D
GN
D
GN
D
GN
D
GN
D
GN
D
GN
D
GN
D
FAN
GN
DVF
AN
HTA
CH5
HP
WM
5
GN
D
500
MIL
TRA
CE
500
MIL
TRA
CE
MO
UN
T N
EAR
BOA
RD E
DG
E
TP20
4RS
+2 RS+2
1 2
P501
TEM
P D
IOD
E/VO
LTA
GE
SEN
SE H
EAD
ER
12
J1 VCC
JUM
PER
TP25
VFA
N+
C14
DN
P
12
P1 I2C
50 V
OLT
50VO
LT
SDA
SCL
RST
AL
ERT
FAU
LT
CON
TRO
L
TACH
SEL
(TA
NT
C-SM
T)
3.3V
VDD
TP26
FAN
GN
D
TP27
3.3V 3.3V
C9 47uF
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Figure 6b. MAX31785 EV Kit Schematic (Sheet 2 of 3)
1 2
P001
TEM
P D
IOD
E/VO
LTA
GE
SEN
SE H
EAD
ER
2 3 41
P002
O
FAN
HEA
DER
2 3 41
P002
C
FAN
HEA
DER
IN1
V+2
GN
D3
NC
4CO
M5
NO
6U
001
MA
X459
9
1
23
Q00
1M
MBT
3904
R001
0
R002
0
3.3V
C004
100n
F
3.3V
R005
O1k
3.3V
R005
C1k
R007
4.7k
R006
10C0
03D
NP
R004
DN
P
R003
10
C002
DN
P
VFA
NFA
NG
ND
RS+0
RS-0
TACH
SEL
TACH
0
PWM
0
1 2
P101
TEM
P D
IOD
E/VO
LTA
GE
SEN
SE H
EAD
ER
2 3 41
P102
FAN
HEA
DER
1
23
Q10
1M
MBT
3904
3.3V
R105
1k
R107
4.7k
R106
10C1
03D
NP
R104
DN
P
R103
10
C102
DN
P
VFA
NFA
NG
ND
RS+1
RS-1
TACH
1
PWM
1
C001 2.
2nF
GN
D
GN
D
GN
D
GN
D
GN
D
R101
0
R102
0
C101 2.
2nF
1 2
P201
TEM
P D
IOD
E/VO
LTA
GE
SEN
SE H
EAD
ER
2 3 41
P202
FAN
HEA
DER
1
23
Q20
1M
MBT
3904
3.3V
R205
1k
R207
4.7k
R206
10C2
03D
NP
R204
DN
P
R203
10
C202
DN
P
VFA
NFA
NG
ND
RS+2
RS-2
TACH
2
PWM
2
GN
D
GN
D
R201
0
R202
0
C201 2.
2nF
1 2
P301
TEM
P D
IOD
E/VO
LTA
GE
SEN
SE H
EAD
ER
2 3 41
P302
FAN
HEA
DER
1
23
Q30
1M
MBT
3904
3.3V
R305
1k
R307
4.7k
R306
10C3
03D
NP
R304
DN
P
R303
10
C302
DN
P
VFA
NFA
NG
ND
RS+3
RS-3
TACH
3
PWM
3
GN
D
GN
D
R301
0
R302
0
C301 2.
2nF
1 2
P401
TEM
P D
IOD
E/VO
LTA
GE
SEN
SE H
EAD
ER
2 3 41
P402
FAN
HEA
DER
1
23
Q40
1M
MBT
3904
3.3V
R405
1k
R407
4.7k
R406
10C4
03D
NP
R404
DN
P
R403
10
C402
DN
P
VFA
NFA
NG
ND
RS+4
RS-4
TACH
4
PWM
4
GN
D
GN
D
R401
0
R402
0
C401 2.
2nF
FAN
GN
DVF
AN
HTA
CH0O
HP
WM
0
FAN
GN
DVF
AN
HTA
CH0C
HP
WM
0
FAN
GN
DVF
AN
HTA
CH1
HP
WM
1
FAN
GN
DVF
AN
HTA
CH2
HP
WM
2
FAN
GN
DVF
AN
HTA
CH3
HP
WM
3
FAN
GN
DVF
AN
HTA
CH4
HP
WM
4
500
MIL
TRA
CE50
0 M
IL T
RACE
500
MIL
TRA
CE50
0 M
IL T
RACE
500
MIL
TRA
CE50
0 M
IL T
RACE
500
MIL
TRA
CE50
0 M
IL T
RACE
500
MIL
TRA
CE50
0 M
IL T
RACE
MO
UN
T N
EAR
BOA
RD E
DG
E
MO
UN
T N
EAR
BOA
RD E
DG
E
MO
UN
T N
EAR
BOA
RD E
DG
E
MO
UN
T N
EAR
BOA
RD E
DG
E
MO
UN
T N
EAR
BOA
RD E
DG
E
Maxim Integrated 13
MAX31785 Evaluation Kit Evaluates: MAX31785
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Figure 6c. MAX31785 EV Kit Schematic (Sheet 3 of 3)
MSDAMSCL
SDASCLRSTAL ERTFAUL TCONTROLTACHSELA0
REG18S
REG25S
TACH0PWM0RS+0RS- 0
VDD
VSS
TACH1PWM1RS+1RS- 1
TACH2PWM2RS+2RS- 2
TACH3PWM3RS+3RS- 3
TACH4PWM4RS+4RS- 4
TACH5PWM5RS+5RS- 5
MSDA14
MSCL15
SDA31
SCL32
RST13
AL ERT38
FAUL T34
CONTROL35
A1/TACHSEL37
A033
REG1822
REG2529
VSS 36VSS 21VSS 2
VDD 9
RS- 5 39RS+5 40PWM5 16TACH5 17
TACH0 30
PWM0 28
RS+0 6
RS- 0 7
TACH1 27
PWM1 26
RS+1 8
RS- 1 10
TACH2 25
PWM2 24
RS+2 11
RS- 2 12
TACH3 23
PWM3 20
RS+3 5
RS- 3 4
TACH4 19
PWM4 18
RS+4 3
RS- 4 1
EP 41
U1B
MAX31785
C191uF
C1810nF
C171uF
C1610nF
GND
GNDC21100nF
C2010nF
Maxim Integrated 14
MAX31785 Evaluation Kit Evaluates: MAX31785
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Figure 8. MAX31785 EV Kit PCB Layout—Bottom
Figure 7. MAX31785 EV Kit PCB Layout—Top
Maxim Integrated 15
MAX31785 Evaluation Kit Evaluates: MAX31785
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#Denotes an RoHS-compliant device that may include lead(Pb), which is exempt under the RoHS requirements.
Ordering InformationPART TYPE
MAX31785K# EV Kit
Maxim Integrated cannot assume responsibility for use of any circuitry other than circuitry entirely embodied in a Maxim Integrated product. No circuit patent licenses are implied. Maxim Integrated reserves the right to change the circuitry and specifications without notice at any time. The parametric values (min and max limits) shown in the Electrical Characteristics table are guaranteed. Other parametric values quoted in this data sheet are provided for guidance.
Maxim Integrated and the Maxim Integrated logo are trademarks of Maxim Integrated Products, Inc. © 2012Maxim Integrated Products, Inc. 16
MAX31785 Evaluation Kit Evaluates: MAX31785
Revision HistoryREVISIONNUMBER
REVISION DATE DESCRIPTION PAGES
CHANGED0 12/12 Initial release —
For pricing, delivery, and ordering information, please contact Maxim Direct at 1-888-629-4642, or visit Maxim Integrated’s website at www.maximintegrated.com.