Texas Instruments TMP1820EVM User manual
EVM User's Guide: TMP1820EVM
TMP1820 Evaluation Module
Description
The TMP1827EVM is designed to provide a quick
setup to evaluate TMP182x devices and gain
familiarity with the devices down to the bit-by-
bit register level. The printed circuit board (PCB)
perforation allows users to separate the TMP1827
from the USB interface. To evaluate TMP1820,
the sensor portion of the TMP1827EVM should be
snapped off, and the TMP1820LPG inserted as
shown.
Get Started
1. Order the TMP1827EVM and TMP1820LPG on
ti.com.
2. Visit TMP1820EVM to launch or download the
GUI software.
Features
• Evaluate TMP182x devices using the provided
software or prototype on standard 0.1-inch
breadboards
• Software powered by GUI Composer runs in
a browser on Windows®, Mac®, and Linux®
operating systems
Applications
•Factory automation and control
•Appliances
•Medical accessories
•CPAP machines
• Battery charger ICs
•EV charging infrastructure
• LED lighting
•Temperature transmitters
• Cold chain
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TMP1820 Evaluation Module 1
Copyright © 2023 Texas Instruments Incorporated
1 Evaluation Module Overview
1.1 Hardware Notice
The TMP1820EVM hardware is not available for purchase during TMP1820 product preview. Please order a
TMP1827EVM, a TMP1820 sample, and connect the sample device to the TMP1827EVM. The TMP1820EVM
software described in this document must be used with the modified EVM.
1.2 Introduction
The TMP1827EVM allows users to evaluate the performance of the TMP1820 digital temperature sensor. The
EVM comes in a USB stick form factor, with an onboard MSP430F5528 microcontroller that interfaces with both
the host computer and the TMP1820 device using a 1-Wire interface. The module is designed with perforations
between the sensor and host controller on the EVM board. The perforation allows the user flexibility in their
evaluation:
• The user can connect the TMP1820 to the user's system/host.
• The user can connect the EVM host and software to the user's system with TMP1820 devices.
• Small individual boards allow the user to place sensors in the user's system.
• Hole spacing is compatible with common 0.1" prototyping breadboards
This user's guide describes the characteristics, operation, and use of the TMP1827EVM evaluation board. The
user's guide details how to set up and configure the software, lists the hardware, and reviews various aspects of
the software operation. Throughout this document, the terms evaluation board, evaluation module, and EVM are
synonymous with the TMP1827EVM. This user's guide also provides information on the operating procedure,
input and output connections, an electrical schematic, printed circuit board (PCB) layout drawings, and a parts
list for the EVM.
1.3 Kit Contents
Table 1-1 lists the contents of the EVM kit. Contact the Texas Instruments Product Information Center nearest
you if any components are missing. TI highly recommends that users check the TI website at https://www.ti.com
to verify that the latest versions of the related software is being used.
Table 1-1. Kit Contents
Item Quantity
TMP1827EVM 1
TMP1820LPG 1
1.4 Specification
PARAMETER CONDITIONS MIN TYP MAX UNIT
VUSB 5 V
3P3V, SDQ 3.3 V
3P3V, SDQ S1 = ON 1.7 5.5 V
MCU TMP1820 Temperature
Source
GPIO SDQ
VDD
GND
1.8 V
10 kΩ
0.1 µF
GND
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1.5 Device Information
The TMP1820 is 1-Wire®, high-accuracy, digital output temperature-sensor. Each device incorporates a factory-
programmed 64-bit unique identification number used for addressing and allowing NIST traceability. The 1-Wire
interface supports both a standard communication mode enabling legacy applications and an overdrive mode,
with up to 90kbps data rate, enabling faster communication present in modern application. Operating in the
overdrive mode allows lowering the bus power as low as 1.7V. In bus-powered mode, the simplest mode of
operation, the TMP1820 1-Wire interface requires only a single connection and a ground return.
2 Hardware
2.1 Perforations
The perforation between the USB controller board and TMP1820 sensor board is designed to allow separation
of the sensor and controller. The holes support standard 0.1" pitch headers. The pins are labeled with their
functions on both sides. The small sensor board can be placed in-system, or the controller can be used to test a
sensor which is part of another system.
2.2 Subregulator
The switch S1 enables and disables the onboard 3.3-V regulator: U8. When the subregulator is enabled,
the green LED D3 illuminates. The subregulator must be enabled for normal operation of TMP1820EVM. A
possibility is to supply other voltages at the 3P3V pin when the subregulator is disabled.
2.3 Logic Level Translator
The translators U3 and U6 separates the MSP430 UART host from the TMP1820 device. This is not required for
end applications, but the translator is provided on the EVM as a courtesy. When the subregulator is disabled, a
voltage between 1.7 V and 5.5 V can be applied at the 3P3V net, which is the 3.3-V pin on the perforation. This
external voltage illuminates the green LED D3 and power the TMP1820 device.
2.4 Programming Header
The TMP1820EVM comes loaded with firmware that is necessary for the correct operation of the USB interface
and PC GUI software. The unpopulated header, J2, is provided for Spy-Bi-Wire access to the MSP430F5528. TI
does not recommend that users access this header or reprogram the device.
2.5 BSL Button
The TMP1820EVM features push-button SW1 for entering USB BSL mode. This can be used for firmware
updates. The button must be held down while the user plugs in the USB and can be released afterward.
2.6 Status LED
The red LED (D4) indicates status in the USB2ANY firmware. A blinking LED indicates the MSP430F5528 is
waiting for USB connection from the GUI application. At initial power on, or when connected to the GUI, the LED
turns off.
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3 Software
3.1 Software Installation
The PC GUI Software for TMP1820EVM runs on TI's GUI Composer framework. The software is available as a
live version, which runs in a browser, and is available as a download for offline use. The software is compatible
with Windows, Mac, or Linux operating systems.
3.1.1 Live Software on dev.ti.com
The live software currently works on Chrome™, Firefox®, and Safari® browsers. Internet Explorer® is not
supported. Users can access the live version through one of the following actions:
• Click on TMP1820EVM.
• Go to the EVM tool page and click the View button.
• Go to dev.ti.com/gallery, log in with myTI account credentials, and search for TMP1820.
Click the application icon within the gallery to launch the software. Agree to the prompts to install or update the
TI Cloud Agent Bridge browser plug-in. The plug-in is necessary for connection to the USB hardware.
3.1.2 Download from dev.ti.com
Users can access the latest version of the offline software by navigating to the live version as noted above. Look
for the download icon and download both the application and run time for the operating system as shown in
Figure 3-1.
Figure 3-1. Download Pop-Up
Software www.ti.com
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3.2 Home Tab
The Home tab is shown at software launch. The icons on the bottom of this tab are shortcuts to the other
functional tabs of the GUI, and correspond to the icons on the left-hand-side of the GUI.
Figure 3-2. Home
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3.3 Data Capture Tab
The Data Capture tab reports the temperature from the TMP1820 device included on the TMP1820EVM.
• Temperature data is polled and displayed by default. To disable polling or change the polling rate, use the
Polling Rate drop-down menu under the Chart Controls tile on the right. The CONVERT TEMP command
(0x44) is sent automatically while polling. The polling rate setting on the Data Capture tab is synchronized
with the polling rate setting on the Registers tab.
• Temperature data can be saved to file when received using the Save Start and Save Stop buttons. Note that,
when the online version of the GUI is used, a download begins in your browser. This download is lost if the
GUI is closed. When the offline version of the GUI is used, the file is appended as data is received. In this
case, appended data is not lost if the GUI is closed.
Figure 3-3. Data Capture
Software www.ti.com
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3.4 Registers Tab
The Registers tab interacts with the ScratchPad-1 registers within the TMP1820 device.
The Auto Read drop-down menu configures polling of register contents. When Auto Read is off, click Read
Register to fetch the contents of the current register. The Read All Registers button can be used to fetch
the contents of all registers at once. The Write Register button is grayed and disabled when the drop-down
menu next to the button is set to Immediate. Immediate mode triggers a write operation each time a register is
modified. When Deferred mode is selected, the Write Register button is enabled, and write operations are not
performed unless the Write Register button is clicked. These settings give the user total control over bus activity,
and enable individual transactions to be easily observed with an oscilloscope, logic analyzer, or bus-sniffing
device.
Figure 3-4. Registers
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4 Hardware Design Files
4.1 Schematic
VBUS
220 ohm
L1 3P3V
IN
1
2
EN
3NC 4
OUT 5
GND
U8
TLV70033DCKR
DM VBUS
22
R1
VBUS
1
D-
2
D+
3
GND
4
5
6
J1
DP
2.2uF
C1
6.2V
D1
BZT52C6V2T-7
100k
R3
1.0k
R4
22
R2
GND
10uF
C2
GND
GND
6.2V
D2
BZT52C6V2T-7 1.00M
R5
1.50k
R6
GND
10pF
16V
C3
10pF
16V
C4
GND
PUR
GNDGND
Green
1
2
D3
12
S1
GND
GND
D1+
1
GND 2
D2+ 3
D2- 4
VCC
5
D1-
6
TPD4S009DRYR
U2
GNDGND
47
R7
VCC
110
R8
1
MP2MP1
2
MP3 MP4
SW1
GND
0.1uF
10V
C5
GNDGND
BSL
3P3V
VCC
IN
1
2
EN
3NC 4
OUT 5
GND
U4
TLV70033DCKR
VCC
VBUS
VCORE VUSB
2.2uF
C6
V18
GND
SBWTCK
10uF
C7
1
2
3
J2
Header_3x1
DNP
GND
SBWTDIO
0.47uF
6.3V
C8
0.47uF
6.3V
C9
0.47uF
6.3V
C10
GND GNDGND GND
GND
GND
VCC
Super Red
D4
1.0k
R13
XT2IN
MSP430F5528IRGCR
P6.0/CB0/A0 1
P6.1/CB1/A1 2
P6.2/CB2/A2 3
P6.3/CB3/A3 4
P6.4/CB4/A4 5
P6.5/CB5/A5 6
P6.6/CB6/A6 7
P6.7/CB7/A7 8
P5.0/A8/VREF+/VEREF+
9
P5.1/A9/VREF-/VEREF-
10
AVCC1
11
P5.4/XIN
12
P5.5/XOUT
13
AVSS1 14
DVCC1
15 DVSS1 16
VCORE
17
P1.0/TA0CLK/ACLK
18
P1.1/TA0.0
19
P1.2/TA0.1
20
P1.3/TA0.2
21
P1.4/TA0.3
22
P1.5/TA0.4
23
P1.6/TA1CLK/CBOUT
24
P1.7/TA1.0
25
P2.0/TA1.1 26
P2.1/TA1.2 27
P2.2/TA2CLK/SMCLK 28
P2.3/TA2.0 29
P2.4/TA2.1 30
P2.5/TA2.2 31
P2.6/RTCCLK/DMAE0 32
P2.7/UCB0STE/UCA0CLK 33
P3.0/UCB0SIMO/UCB0SDA
34
P3.1/UCB0SOMI/UCB0SCL
35
P3.2/UCB0CLK/UCA0STE
36
P3.3/UCA0TXD/UCA0SIMO
37
P3.4/UCA0RXD/UCA0SOMI
38
DVSS2 39
DVCC2
40
P4.0/PM_UCB1STE/PM_UCA1CLK 41
P4.1/PM_UCB1SIMO/PM_UCB1SDA 42
P4.2/PM_UCB1SOMI/PM_UCB1SCL 43
P4.3/PM_UCB1CLK/PM_UCA1STE 44
P4.4/PM_UCA1TXD/PM_UCA1SIMO 45
P4.5/PM_UCA1RXD/PM_UCA1SOMI 46
P4.6/PM_NONE 47
P4.7/PM_NONE 48
VSSU 49
PU.0/DP
50
PUR
51
PU.1/DM
52
VBUS
53
VUSB
54
V18
55
AVSS2 56
P5.2/XT2IN
57
P5.3/XT2OUT
58
TEST/SBWTCK 59
PJ.0/TDO 60
PJ.1/TDI/TCLK 61
PJ.2/TMS 62
PJ.3/TCK 63
RST/NMI/SBWTDIO 64
QFN PAD 65
U5
XT2OUT
1
3
NC
4NC
2
Y1
VCC
DP
DM
33.0k
R14
PUR
SBWTDIOV18
VCORE SBWTCK
VBUS
2200pF
50V
C14
VUSB
VCC
GND
GND
0.1uF
10V
C15
0.1uF
10V
C16
0.1uF
10V
C17
GNDGND GND
VBUS = 5V INPUT
VUSB = 3.3V OUT
VUSB 12mA Max
0.1uF
10V
C13
GND
3P3V
390
R9
A
3
VCCA
1
B4
DIR
5GND 2
VCCB 6
SN74LVC1T45DCKR
U3
MCU_TX
MCU_RX
MCU_RX
3P3V
VCC
GND
0.1uF
10V
C18
0.1uF
10V
C19
GNDGND
A
3
VCCA
1
B4
DIR
5GND 2
VCCB 6
SN74LVC1T45DCKR
U6
MCU_TX 2 4
SN74LVC1G07DCKT
U7A
NC
1
GND 3
VCC
5
SN74LVC1G07DCKT
U7B
3P3V
SDQ
0.1uF
10V
C20
3P3V
GND GND
340ohm min
connect vdd to gnd for parasitic mode
GNDGND
0
R10
DNP
SDQ
VDD
1IO0 6
IO1 7
IO2 8
IO3 5
ADDR
3
SDQ
2
GND 4
Thermal_Pad 9
TMP1827NGR
U1
GND GND
Figure 4-1. Schematic
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4.3 Bill of Materials
Table 4-1 lists the bill of materials for TMP1820EVM.
Table 4-1. Bill of Materials
Designator Quantity Value Description Package Reference Part Number Manufacturer
!PCB1 1 Printed Circuit Board SENS091 Any
C1, C6 2 2.2uF CAP, CERM, 2.2 uF, 16 V, +/- 10%, X5R, 0402 0402 GRM155R61C225KE11D MuRata
C14 1 2200 pF CAP, CERM, 2200 pF, 50 V, +/- 5%, X7R, 0402 0402 CL05B222JB5NNNC Samsung Electro-
Mechanics
C2, C7 2 10uF CAP, CERM, 10 uF, 10 V, +/- 20%, X5R, 0603 0603 C1608X5R1A106M080AC TDK
C3, C4 2 10 pF CAP, CERM, 10 pF, 16 V,+/- 10%, C0G, 0402 0402 C0402C100K4GACTU Kemet
C5, C13, C15, C16,
C17, C18, C19,
C20
8 0.1uF CAP, CERM, 0.1 uF, 10 V,+/- 10%, X5R, 0402 0402 LMK105BJ104KV-F Taiyo Yuden
C8, C9, C10 3 0.47uF CAP, CERM, 0.47 uF, 6.3 V, +/- 10%, X7R, 0402 0402 JMK105B7474KVHF Taiyo Yuden
D1, D2 2 6.2V Diode, Zener, 6.2 V, 300 mW, SOD-523 SOD-523 BZT52C6V2T-7 Diodes Inc.
D3 1 Green LED, Green, SMD LED, GREEN, 0603 SML-LX0603GW-TR Lumex
D4 1 Super Red LED, Super Red, SMD LED_0603 150060SS75000 Wurth Elektronik
J1 1 Connector, Plug, USB Type A, R/A, Top Mount
SMT
USB Type A right angle 48037-1000 Molex
J2 0 Header, 2.54 mm, 3x1, Gold, TH Header, 2.54 mm, 3x1, TH GBC03SAAN Sullins Connector
Solutions
L1 1 220 ohm Ferrite Bead, 220 ohm @ 100 MHz, 0.45 A, 0402 0402 BLM15AG221SN1D MuRata
R1, R2 2 22 RES, 22, 5%, 0.1 W, AEC-Q200 Grade 0, 0402 0402 ERJ-2GEJ220X Panasonic
R10 0 0 RES, 0, 5%, 0.063 W, AEC-Q200 Grade 0, 0402 0402 CRCW04020000Z0ED Vishay-Dale
R14 1 33.0k RES, 33.0 k, 1%, 0.063 W, 0402 0402 RC0402FR-0733KL Yageo America
R3 1 100k RES, 100 k, 5%, 0.1 W, AEC-Q200 Grade 0, 0402 0402 ERJ-2GEJ104X Panasonic
R4, R13 2 1.0k RES, 1.0 k, 5%, 0.1 W, AEC-Q200 Grade 0, 0402 0402 ERJ-2GEJ102X Panasonic
R5 1 1.00Meg RES, 1.00 M, 1%, 0.063 W, AEC-Q200 Grade 0,
0402
0402 RMCF0402FT1M00 Stackpole Electronics
Inc
R6 1 1.50k RES, 1.50 k, 1%, 0.063 W, AEC-Q200 Grade 0,
0402
0402 RMCF0402FT1K50 Stackpole Electronics
Inc
R7 1 47 RES, 47, 5%, 0.1 W, AEC-Q200 Grade 0, 0402 0402 ERJ-2GEJ470X Panasonic
R8 1 110 RES, 110, 1%, 0.1 W, AEC-Q200 Grade 0, 0402 0402 ERJ-2RKF1100X Panasonic
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