MAX31341EVKIT [MAXIM]
Easy Evaluation of the MAX31341B and MAX31341C;
| 型号： | MAX31341EVKIT |
| 厂家： | 
MAXIM INTEGRATED PRODUCTS |
| 描述： | Easy Evaluation of the MAX31341B and MAX31341C |
| 文件： | 总15页 (文件大小：7497K) |
| 中文： | 中文翻译 | 下载： | 下载PDF数据表文档文件 |
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Evaluates: MAX31341B/MAX31341C
MAX31341 Shield Evaluation Kit
General Description
Quick Start
The MAX31341 Shield evaluation kit (EV kit) is a fully
assembled and tested PCB to evaluate the MAX31341B
and MAX31341C, low-cost, extremely accurate, real-time
Required Equipment
●
One DC power supply capable of supplying +1.6V to
+3.6V (typical +3.0V used in the following instructions)
2
clocks (RTCs) with I C interface and power manage-
●
●
●
●
●
One pico ammeter for measuring the current
One oscilloscope
ment. The EV kit operates from a single supply, either
from USB or an external power supply, and the onboard
crystal provides a 32.768kHz clock signal. This device is
One Micro USB cable
2
accessed through an I C serial interface provided by a
2
One assembled MAX32625PICO I C circuit board
MAX32625PICO board from a PC USB port.
One MAX31341 Shield EV kit
The MAX31341 Shield EV kit provides the hardware and
software user interface (GUI) necessary to evaluate the
MAX31341B and MAX31341C. The EV kit includes a
MAX31341B and a MAX31341C installed. It connects to
the PC through a MAX32625 PICO board and a Micro
USB cable.
EV Kit Photo
Features
● Easy Evaluation of the MAX31341B and MAX31341C
● +1.6V to +3.6V Single-Supply Operation
● Proven PCB Layout
● Fully Assembled and Tested
EV Kit Contents
● Assembled MAX32625PICO I C circuit board
2
● Micro USB cable
● Assembled circuit board, including the MAX31341B
and MAX31341C
Ordering Information appears at end of data sheet.
319-100144; Rev 4; 4/20
Evaluates: MAX31341B/MAX31341C
MAX31341 Shield Evaluation Kit
6) Turn on the +3.0V DC power supply.
Procedure
The EV kit is fully assembled and tested. Follow these
steps to verify board operation.
7) Visit here to download the latest version of the
MAX31341 RTC EV kit software, and run the control
software.
1) Place the MAX31341 Shield EV kit on a nonconduc-
tive surface to ensure that nothing on the PCB gets
shorted to the workspace.
8) Open the MAX31341B/C RTC Shield software.
The MAX31341B/C RTC Shield Software Con-
figuration & Time tab will open, showing USB
Connected (Figure 3) in the lower right corner.
2) Set the jumpers to their default positions, as shown
in Figure 1a for testing the WLP IC and Figure 1b for
testing the TDFN IC.
9) At power-up, the MAX31341B/C is in idle mode; no
clock is running yet. On the Configuration & Time
tab, in the RTC Configuration section, enable Oscil-
lator Enable to start the clock. Verify the clock has
started counting by checking the Auto Update box in
the Real Time Monitoring section.
3) With the output of the power supply set to +3.0V and
disabled, connect the positive terminal of the DC sup-
ply to the VCC_EXT and negative terminal to the GND
of the EV kit.
2
4) Connect the MAX32625PICO I C circuit board to the
EV kit at the location shown as DS3900 (Figure 2).
5) Connect the Micro USB cable between the
MAX32625PICO Board and PC/laptop.
Figure 1a. WLP_Jumper Setting
Figure 1b. TDFN_Jumper Setting
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Evaluates: MAX31341B/MAX31341C
MAX31341 Shield Evaluation Kit
Figure 2. USB Connection
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Evaluates: MAX31341B/MAX31341C
MAX31341 Shield Evaluation Kit
Note: All instruments must be disconnected from
the I/O ports of the IC, since any loading would add
current consumption. Also, be sure that the waiting
duration from power-up to the current reading is long
enough (30min) due to on-board capacitor charging.
Detailed Description
The MAX31341B/MAX31341C low-current RTCs are time-
keeping devices that provide time-keeping current in nano-
amperes, thus extending battery life. The MAX31341B/
MAX31341C support 6pF high-ESR crystals, which broad-
en the pool of usable crystals for the devices. These
4) Remove the pico ammeter and put the jumper back
on JU7 or JU8.
2
devices are accessed through an I C serial interface. The
devices feature one digital Schmitt trigger input and one
programmable threshold analog input. The devices gener-
ate an interrupt output on a falling or rising edge of the
digital input (D1), or when the analog input (AIN) voltage
crosses a programmed threshold in either direction. An
integrated power-on reset function ensures deterministic
default register status upon power-up.
Setting the Clock
On the Configuration & Time tab in the Date/Time
Configuration section, enter the start point of date and
time, and then click Set. The clock starts to count from the
set point after the Status Log shows Write successful.
In the Real Time Monitoring section, verify that the clock
is counting from the written start date and time.
Other features include two time-of-day alarms, interrupt
outputs, a programmable square-wave output, a serial
bus timeout mechanism, and a 64-byte RAM for user
data storage. The clock/calendar provides seconds, min-
utes, hours, day, date, month, and year information. The
date at the end of the month is automatically adjusted
for months with fewer than 31 days, including correc-
tions for leap year. The clock operates in 24-hour format.
The MAX31341B/MAX31341C also include an input for
synchronization. When a reference clock (e.g., 32kHz,
50Hz/60Hz power line, GPS 1PPS) is present at the
CLKIN pin and the enable external clock input bit (ECLK)
is set to 1, the MAX31341B/MAX31341C RTC is frequen-
cy-locked to the external clock and the clock accuracy is
determined by the external source.
Clock Output Measurement
On the Configuration & Time tab in the RTC
Configuration section, enable CLKOUT and select the
desired CLKOUT Frequency. The clock output can be
monitored using an oscilloscope connected to INTB/
CLKOUT. A frequency counter can also be used to mea-
sure the clock frequency accurately.
Alarm Interrupt Output
On the Alarms & Timer tab in the Alarm 1 Configuration
section, select the Repetition Rate to set the alarm
scenario (such as Min, Sec at 02:00). In the Interrupts
subsection of the Interrupts & Flags section, check the
Alarm 1 Interrupt box. In the Flags subsection, press the
Read button twice to clear the alarm flag bit if it has been
previously set. When the RTC reaches the alarm time set
in Alarm 1 Configuration, the alarm output at INTA/CLKIN
will go from high to low. It will change to high again by press-
ing the Read button in the Flags subsection. The interrupt
status can also be checked by pressing Read button in the
Flags subsection. Repeat the same steps for Alarm 2, but
measure the alarm interrupt output at INTB/CLKOUT.
Functional Test Procedure
Current Draw at Time-Keeping Operation
1) To measure the current draw under normal RTC condi-
tions without any interrupt or clock input/output, do the
following:
● In the RTC Configuration section, press the Read
button.
Note: When testing alarm interrupts, CLKIN and
CLKOUT in the RTC Configuration section need to be
disabled.
● Disable CLKIN and CLKOUT.
● Select 1Hz for Frequency.
2) Remove the jumper from JU7 (for the MAX31341B) or
JU8 (for the MAX31341C) and connect the pico am-
meter between pins 1 and 2 of JU7 or JU8.
Timer Interrupt
Clear all interrupt bits by pressing the Read button in
the Flags subsection. Enable the Timer and Interrupt by
checking Timer Enable in the Timer Configuration sec-
tion and Timer Interrupt in the Interrupts subsection,
then select 16Hz on Timer Frequency. Set the Timer
Init number such as 200. When the Timer Count reading
reaches 0 from 200, the interrupt output at INTA/CLKIN
should go from high to low.
3) On the Registers tab (Figure 5), in the Register Map
section, press the Read button and make sure that the
value of register 0 (Config_reg1) shows 0x41. Other-
wise, set it to 0x41 and press the Write button. Now
the reading in the picometer is the current from the
MAX31341B or MAX31341C only. It should be around
210nA.
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Evaluates: MAX31341B/MAX31341C
MAX31341 Shield Evaluation Kit
uses the main supply and Force VBAT means the IC gets
the supply from the backup battery; from either source,
the on-board supercapacitor or external backup supply is
injected from the TP2 (VBAT) test point. In Auto, the
supply switches between VCC and VBAT automatically
based on the threshold set in the Analog Interrupt sec-
tion. To verify which supply is utilized, the clock output can
be monitored while changing the power-supply mode with
VCC and VBAT in different voltages. Also, the superca-
pacitor voltage at Analog IN (JU2-AIN) can be charged
to “VCC minus diode drop voltage” at a selectable rate in
the pull-down table.
Power Mode Select
On the Configuration & Time tab in the Power
Management section, in the Comparator Mode drop-
down list there are two options: AIN Interrupt Mode
for normal I/O operation, and Power Management &
Trickle Charger mode for Power Management and Trickle
Charger mode which charges the on-board supercapaci-
tor as a backup battery.
In Power Management & Trickle Charger mode, the
Supply Select drop-down list can be used to select the
source of the power supply. Force VCC means the IC
Figure 3. MAX31341B/C RTC Shield Software—Configuration & Time Tab
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Evaluates: MAX31341B/MAX31341C
MAX31341 Shield Evaluation Kit
Figure 4. MAX31341B/C RTC Shield Software—Alarms & Timer Tab
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Evaluates: MAX31341B/MAX31341C
MAX31341 Shield Evaluation Kit
Figure 5. MAX31341B/C RTC Shield Software—Registers Tab
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Evaluates: MAX31341B/MAX31341C
MAX31341 Shield Evaluation Kit
Jumper Settings for Testing WLP IC
SHUNT
JUMPER
DESCRIPTION
POSITION
1–2
1–3
Connects AIN to VBAT at TP2.
Connects AIN to GND.
JU2
JU4
JU6
1–4*
1–2*
2–3
Connects AIN to supercapacitor.
System V ** is powered by VCC_EXT at TP5.
CC
System V
is powered by +3.3V supply from Mbed/Arduino/PICO platform.
CC
1–2
Connects INTA/CLKIN pin of U1 to ground.
1–3*
1–4
Connects INTA/CLKIN pin of U1 to Mbed/Arduino/PICO platform, through a level translator (U5).
Connects INTA/CLKIN pin of U1 to test point TP3 with a 10kΩ pullup resistor to system V
.
CC
1–2*
System V
connects to VCC pin of U1.
CC
JU7
JU8
Float VCC pin of U1. Connect an ammeter between pin1 and 2 to measure the current
consumption of U1.
OPEN
1–2
System V
powers U2 V
pin.
CC
CC
Floats VCC pin of U2. Connect an ammeter between the pins of JU8 to measure the current
consumption of U2.
OPEN*
1–2*
OPEN
1–2*
Connects SDA pin of U1 and U2 to Mbed/Arduino/PICO platform for GUI control.
JU10
JU11
JU13
JU14
2
Floats SDA pin for users’ own I C control.
Connects SCL pin of U1 and U2 to Mbed/Arduino/PICO platform for GUI control.
2
OPEN
1–2*
Floats SCL pin for users’ own I C control.
Connects power backup selection AIN at JU2 to AIN pin of U1.
OPEN
1–2
Floats AIN pin of U1 for users’ signal input.
Connects power backup selection AIN at JU2 to AIN pin of U2.
OPEN*
1–2
Floats AIN pin of U2 for users’ signal input.
U2
U1
JU15
2–3*
* Default position
** System V
is labeled VCC on the PCB.
CC
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Evaluates: MAX31341B/MAX31341C
MAX31341 Shield Evaluation Kit
Jumper Settings for Testing TDFN IC
SHUNT
JUMPER
DESCRIPTION
POSITION
1–2
1–3
1–4*
1–2*
2–3
1–2
1–3*
1–4
1–2
Connects AIN to VBAT at TP2.
Connects AIN to GND.
JU2
JU4
JU6
Connects AIN to supercapacitor.
System V ** is powered by VCC_EXT at TP5.
CC
System V
powered by +3.3V supply from Mbed/Arduino/PICO platform.
CC
Connects INTA/CLKIN pin of U2 to ground.
Connects INTA/CLKIN pin of U2 to Mbed/Arduino/PICO platform through a level translator (U5).
Connects INTA/CLKIN pin of U2 to test point TP3 with a 10kΩ pullup resistor to system V
.
CC
System V
connects to VCC pin of U1.
CC
JU7
JU8
Float VCC pin of U1. Connect an ammeter between pin1 and 2 to measure the current
consumption of U1.
OPEN*
1–2*
System V
powers U2 V
pin.
CC
CC
Floats VCC pin of U2. Connect an ammeter between the pins of JU8 to measure the current
consumption of U2.
OPEN
1–2*
OPEN
1–2*
Connects SDA pin of U2 to Mbed/Arduino/PICO platform for GUI control.
JU10
JU11
JU13
JU14
JU15
2
Floats SDA pin for users’ own I C control.
Connects SCL pin of U2 to Mbed/Arduino/PICO platform for GUI control.
2
OPEN
1–2
Floats SCL pin for users’ own I C control.
Connects power backup selection AIN at JU2 to AIN pin of U1.
OPEN*
1–2*
Floats AIN pin of U1 for users’ signal input.
Connects power backup selection AIN at JU2 to AIN pin of U2.
OPEN
1–2*
Floats AIN pin of U2 for users’ signal input.
U2
U1
2–3
* Default position
** System V is labeled VCC on the PCB.
CC
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Evaluates: MAX31341B/MAX31341C
MAX31341 Shield Evaluation Kit
Component Suppliers
SUPPLIER
WEBSITE
http://www.murata.com/
http://www.yageo.com/
Murata
Yageo
Eaton
http://www.eaton.com/
Amphenol FCI
Samtec
http://www.fci.com/
https://www.samtec.com/
http://www.te.com/usa-en/home.html
http://www.keyelco.com/
https://www.ecsxtal.com/
http://www.onsemi.com/
TE Connectivity
Keystone Electronics
ECS
ON Semiconductor
Note: Indicate that you are using the MAX31341 when contacting these component suppliers.
Ordering Information
PART NUMBER
TYPE
MAX31341SHLD#
EV Kit
#Denotes RoHS compliant.
MAX31341 Shield EV Kit Bill of Materials
REF_DES
DNI/DNP
QTY
MFG PART #
MANUFACTURER
VALUE
DESCRIPTION
ITEM
C2, C7,
C8, C15
CL05B105KQ5NQNC;
GRM155R70J105KA12
SAMSUNG
ELECTRONICS; MURATA
CAPACITOR; SMT (0402); CERAMIC CHIP; 1µF; 6.3V; TOL = 10%;
TG = -55°C TO +125°C; TC = X7R
1
—
4
1µF
C3, C5, C9,
C16-C18
2
—
6
CL05B104KQ5NNN
SAMSUNG
0.1µF
CAP; SMT (0402); 0.1µF; 10%; 6.3V; X7R; CERAMIC CHIP ;
C1005X7R1C104K050BC;
ATC530L104KT16;
0402YC104KAT2A;
CGA2B1X7R1C104K050BC;
GCM155R71C104KA55;
C0402X7R160-104KNE;
CL05B104KO5NNNC;
GRM155R71C104KA88;
C1005X7R1C104K;
TDK;AMERICAN
TECHNICAL CERAMICS;
AVK;TDK;MURATA;
VENKEL LTD.;SAMSUNG
ELECTRONICS; MURATA;
TDK; YAGEO PHICOMP;
TAIYO YUDEN;
C4, C11,
C13, C19
CAPACITOR; SMT (0402); CERAMIC CHIP; 0.1µF; 16V;
TOL = 10%; TG = -55°C TO +125°C; TC = X7R
3
—
4
0.1µF
SAMSUNG
ELECTRONICS
CC0402KRX7R7BB104;
EMK105B7104KV;
CL05B104KO5
C10, C12,
C14, C20
CAPACITOR; SMT (0402); CERAMIC CHIP; 0.01µF; 25V;
TOL = 5%; TG = -55°C TO +125°C; TC = X7R
4
5
6
—
—
—
4
2
1
C0402C103J3RAC
75915-310LF
KEMET
FCI CONNECT
SAMTEC
0.01µF
J1, J2
J3
75915-310LF
SSQ-110-04-G-S
CONNECTOR; FEMALE; THROUGH HOLE; STRAIGHT; 10PINS
CONNECTOR; FEMALE; THROUGH HOLE;
.025IN SQ POST SOCKET; STRAIGHT; 10PINS ;
SSQ-110-04-G-S
CONNECTOR; MALE; THROUGH HOLE;
THROUGH-HOLE .025 SQ POST SOCKET ; STRAIGHT; 6PINS
7
J4
—
1
SSQ-106-03-G-S
SAMTEC
SSQ-106-03-G-S
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Evaluates: MAX31341B/MAX31341C
MAX31341 Shield Evaluation Kit
MAX31341 Shield EV Kit Bill of Materials (continued)
REF_DES
DNI/DNP
QTY
MFG PART #
MANUFACTURER
VALUE
DESCRIPTION
ITEM
CONNECTOR; FEMALE; THROUGH HOLE;
.025IN SQ POST SOCKET; STRAIGHT; 8PINS
8
J6
—
1
SSQ-108-03-G-S
SAMTEC
SSQ-108-03-G-S
CONNECTOR; FEMALE; THROUGH HOLE;
.025IN SQ POST SOCKET; STRAIGHT; 8PINS ;
9
J7
—
—
—
—
—
1
2
2
6
4
SSQ-108-04-G-S
TSW-104-07-L-S
PEC03SAAN
SAMTEC
SAMTEC
SULLINS
SSQ-108-04-G-S
TSW-104-07-L-S
PEC03SAAN
PBC02SAAN
10K
EVKIT PART-CONNECTOR; MALE; THROUGH HOLE;
TSW SERIES; SINGLE ROW; STRAIGHT; 4PINS
10
11
12
13
JU2, JU6
JU4, JU15
CONNECTOR; MALE; THROUGH HOLE; BREAKAWAY;
STRAIGHT; 3PINS
JU7, JU8, JU10,
JU11, JU13, JU14
SULLINS
ELECTRONICS CORP.
EVKIT PART-CONNECTOR; MALE; THROUGH HOLE;
BREAKAWAY; STRAIGHT; 2PINS; -65°C TO +125°C;
PBC02SAAN
CRCW040210K0FK;
RC0402FR-0710KL
VISHAY DALE;
YAGEO PHICOMP
R3, R7-R9
RESISTOR; 0402; 10K; 1%; 100PPM; 0.0625W; THICK FILM
RC0402JR-070RL;
CR0402-16W-000RJT
YAGEO PHYCOMP;
VENKEL LTD.
14
15
16
R6
R10
—
—
—
1
1
1
0
RESISTOR; 0402; 0Ω; 5%; JUMPER; 0.063W; THICK FILM
ERJ-2GEJ103
PANASONIC
10K
RESISTOR; 0402; 10KΩ; 5%; 200PPM; 0.10W; THICK FILM
EATON POWERING
BUSINESS WORLDWIDE
CAP; THROUGH HOLE-RADIAL LEAD; 0.33F; +80%/-20%; 5.5V;
ALUMINUM-ELECTROLYTIC ;
SUPER-C
KW-5R5C334-R
0.33F
SWITCH; DPDT; SMT; 12V; 0.1A; MINIATURE SLIDE SWITCHES;
RCOIL = 0.08Ω; RINSULATION=100M OHM
17
18
SW1
—
—
1
4
AYZ0202AGRLC
5010
C&K COMPONENTS
KEYSTONE
AYZ0202AGRLC
N/A
TEST POINT; PIN DIA = 0.125IN; TOTAL LENGTH = 0.445IN;
BOARD HOLE = 0.063IN; RED; PHOSPHOR BRONZE WIRE SIL;
TP1-TP3, TP5
TEST POINT; PIN DIA = 0.125IN; TOTAL LENGTH = 0.445IN;
BOARD HOLE = 0.063IN; BLACK; PHOSPHOR BRONZE WIRE
SILVER PLATE FINISH;
19
TP4, TP6
—
2
5011
KEYSTONE
N/A
IC; RTC; LOW-CURRENT; REAL-TIME CLOCK WITH I2C
INTERFACE AND POWER MANAGEMENT; WLP12 ;
20
21
22
23
24
25
26
U1
—
—
1
1
2
2
2
1
0
MAX31341BEWC+
MAX31341C
MAXIM
MAXIM
MAXIM
MAX31341BEWC+
MAX31341C
MAX14689AETB+
NLSX4373MUTAG
32.768KHZ
EVKIT PART - IC; MAX31341C; PACKAGE OUTLINE DRAWING:
21-0137; LAND PATTERN DRAWING: 90-0061
U2
IC; ASW; ULTRA-SMALL LOW-RON BEYOND-THE-RAILS DPDT
ANALOG SWITCHES; TDFN10-EP
U3, U4
U5, U6
Y1, Y2
PCB
—
MAX14689AETB+
NLSX4373MUTAG
ECS-.327-6-12
ON
IC; TRANS; 2-BIT 20 MB/S DUAL-SUPPLY LEVEL TRANSLATOR;
UDFN8
—
SEMICONDUCTOR
CRYSTAL; SMT 2.0 MM X 1.2 MM; 6PF; 32.768KHZ;
±20PPM; -0.03PPM/°C2
—
ECS INC
MAXIM
AVX
—
MAX31341SHIELD
TAJC106K016RNJ
PCB
PCB:MAX31341SHIELD
CAPACITOR; SMT (6032); TANTALUM CHIP; 10µF; 16V; TOL = 10%;
MODEL = TAJ SERIES; TG = -55°C TO +125°C
C1, C6
DNP
10µF
27
R1, R2, R5
R4
DNP
DNP
0
0
ERJ-2GEJ103
N/A
PANASONIC
N/A
10K
RESISTOR; 0402; 10KΩ; 5%; 200PPM; 0.10W; THICK FILM
28
OPEN
PACKAGE OUTLINE 0402 RESISTOR
TOTAL
57
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Evaluates: MAX31341B/MAX31341C
MAX31341 Shield Evaluation Kit
MAX31341 Shield EV Kit Schematic Diagram
ꢋ
1
3
1
3
4
ꢋ
ꢒ
1 1
C 4
1 1
C ꢋ
B 4
A 1
ꢋ
1
1 1
ꢀ ꢁ ꢂ ꢁ ꢃ A ꢄ
ꢀ ꢁ ꢂ ꢁ ꢃ A ꢄ
ꢋ
ꢒ
4
ꢙ
1
ꢋ
ꢇ ꢅ ꢉ E ꢊ
A ꢆ A ꢄ ꢅ ꢂ ꢁ ꢆ
1
3
1
3
ꢋ
ꢅ ꢇ E ꢆ
ꢊ 4
ꢙ
ꢏ
ꢊ ꢌ
ꢙ
Figure 6. MAX31341 Shield EV Kit Schematic
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Evaluates: MAX31341B/MAX31341C
MAX31341 Shield Evaluation Kit
MAX31341 Shield EV Kit PCB Layout Diagrams
1.0ꢀ
1.0ꢀ
MAX31341 Shield EV Kit—Assembly Top
MAX31341 Shield EV Kit—PCB Top Layer
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Evaluates: MAX31341B/MAX31341C
MAX31341 Shield Evaluation Kit
MAX31341 Shield EV Kit PCB Layout Diagrams (continued)
1.0ꢀ
1.0ꢀ
MAX31341 Shield EV Kit—PCB Bottom Layer
MAX31341 Shield EV Kit—PCB Bottom Silkscreen
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Evaluates: MAX31341B/MAX31341C
MAX31341 Shield Evaluation Kit
Revision History
REVISION REVISION
PAGES
CHANGED
DESCRIPTION
NUMBER
DATE
1/18
2/19
3/19
5/19
0
1
2
3
Initial release
—
Updated data sheet figures, BOM, and PCB layout diagrams
Updated title to include MAX31341B, updated BOM and schematic
Updated Procedure section and added Jumper Settings table
1–12
1–12
2, 8
Updated throughout to add Shield and MAX31341C; updated all sections, figures,
tables, BOM, schematic, and layout diagrams
4
4/20
1–12
For pricing, delivery, and ordering information, please visit Maxim Integrated’s online storefront at https://www.maximintegrated.com/en/storefront/storefront.html.
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.
©
Maxim Integrated and the Maxim Integrated logo are trademarks of Maxim Integrated Products, Inc.
2020 Maxim Integrated Products, Inc.
│ 15
相关型号：
MAX313CPE+
SPST, 4 Func, 1 Channel, CMOS, PDIP16, 0.300 INCH, PLASTIC, MO-058AB, MS-001AA, DIP-16
MAXIM
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