Texas Instruments INA280EVM User manual

User’s Guide
INA280EVM
ABSTRACT
This user’s guide describes the characteristics, operation, and use of the INA280 evaluation module (EVM). This
EVM is designed to evaluate the performance of the INA280 voltage-output, current shunt monitor in a variety of
configurations. Throughout this document, the terms evaluation board, evaluation module, and EVM are
synonymous with the INA280EVM. This document also includes a schematic, reference printed-circuit board
(PCB) layouts, and a complete bill of materials (BOM).
www.ti.com
SBOU251 – OCTOBER 2020
Submit Document Feedback
INA280EVM 1
Copyright © 2020 Texas Instruments Incorporated

Table of Contents
1 General Texas Instruments High Voltage Evaluation (TI HV EVM) User Safety Guidelines............................................ 3
2 Overview..................................................................................................................................................................................4
2.1 EVM Kit Contents...............................................................................................................................................................4
2.2 Related Documentation From Texas Instruments.............................................................................................................. 4
3 Hardware................................................................................................................................................................................. 5
3.1 Features............................................................................................................................................................................. 5
4 Operation.................................................................................................................................................................................6
4.1 Quick Start Setup............................................................................................................................................................... 6
4.2 Measurements................................................................................................................................................................... 6
5 EVM Components................................................................................................................................................................... 7
5.1 R2_An, R3_An, R4_An, C2_An, C3_An............................................................................................................................ 7
5.2 C1_An................................................................................................................................................................................ 7
5.3 R1_An................................................................................................................................................................................ 7
5.4 U1_An (INA280).................................................................................................................................................................7
6 Schematic, PCB Layout, and Bill of Materials......................................................................................................................8
6.1 Schematics.........................................................................................................................................................................8
6.2 PCB Layout...................................................................................................................................................................... 11
6.3 Bill of Materials.................................................................................................................................................................13
List of Figures
Figure 6-1. INA280EVM Schematic: Gain A1 Panel....................................................................................................................8
Figure 6-2. INA280EVM Schematic: Gain A2 Panel....................................................................................................................8
Figure 6-3. INA280EVM Schematic: Gain A3 Panel....................................................................................................................9
Figure 6-4. INA280EVM Schematic: Gain A4 Panel....................................................................................................................9
Figure 6-5. INA280EVM Schematic: Gain A5 Panel..................................................................................................................10
Figure 6-6. INA280EVM Top Overlay.........................................................................................................................................11
Figure 6-7. INA280EVM Bottom Overlay................................................................................................................................... 11
Figure 6-8. INA280EVM Top Layer............................................................................................................................................ 11
Figure 6-9. INA280EVM Bottom Layer.......................................................................................................................................11
Figure 6-10. INA280EVM Top Solder........................................................................................................................................ 12
Figure 6-11. INA280EVM Bottom Solder................................................................................................................................... 12
Figure 6-12. INA280EVM Drill Drawing..................................................................................................................................... 12
List of Tables
Table 2-1. INA280 Gain Option Summary................................................................................................................................... 4
Table 2-2. INA280EVM Kit Contents............................................................................................................................................4
Table 2-3. Related Documentation.............................................................................................................................................. 4
Table 6-1. Bill of Materials..........................................................................................................................................................13
Trademarks
All trademarks are the property of their respective owners.
Table of Contents www.ti.com
2INA280EVM SBOU251 – OCTOBER 2020
Submit Document Feedback
Copyright © 2020 Texas Instruments Incorporated

1 General Texas Instruments High Voltage Evaluation (TI HV EVM) User Safety
Guidelines
WARNING
Always follow TI’s setup and application instructions, including use of all interface components within their
recommended electrical rated voltage and power limits. Always use electrical safety precautions to help ensure
your personal safety and those working around you. Contact TI's Product Information Center http://
support/ti./com for further information.
Save all warnings and instructions for future reference.
WARNING
Failure to follow warnings and instructions may result in personal injury, property damage or death
due to electrical shock and burn hazards.
The term TI HV EVM refers to an electronic device typically provided as an open framed, unenclosed printed
circuit board assembly. It is intended strictly for use in development laboratory environments, solely for qualified
professional users having training, expertise and knowledge of electrical safety risks in development and
application of high voltage electrical circuits. Any other use and/or application are strictly prohibited by Texas
Instruments. If you are not suitable qualified, you should immediately stop from further use of the HV EVM.
1. Work Area Safety
a. Keep work area clean and orderly.
b. Qualified observer(s) must be present anytime circuits are energized.
c. Effective barriers and signage must be present in the area where the TI HV EVM and its interface
electronics are energized, indicating operation of accessible high voltages may be present, for the
purpose of protecting inadvertent access.
d. All interface circuits, power supplies, evaluation modules, instruments, meters, scopes and other related
apparatus used in a development environment exceeding 50Vrms/75VDC must be electrically located
within a protected Emergency Power Off EPO protected power strip.
e. Use stable and nonconductive work surface.
f. Use adequately insulated clamps and wires to attach measurement probes and instruments. No freehand
testing whenever possible.
2. Electrical Safety
As a precautionary measure, it is always a good engineering practice to assume that the entire EVM may
have fully accessible and active high voltages.
a. De-energize the TI HV EVM and all its inputs, outputs and electrical loads before performing any electrical
or other diagnostic measurements. Revalidate that TI HV EVM power has been safely de-energized.
b. With the EVM confirmed de-energized, proceed with required electrical circuit configurations, wiring,
measurement equipment connection, and other application needs, while still assuming the EVM circuit
and measuring instruments are electrically live.
c. After EVM readiness is complete, energize the EVM as intended.
WARNING
While the EVM is energized, never touch the EVM or its electrical circuits, as they could be at
high voltages capable of causing electrical shock hazard.
3. Personal Safety
a. Wear personal protective equipment (for example, latex gloves or safety glasses with side shields) or
protect EVM in an adequate lucent plastic box with interlocks to protect from accidental touch.
Limitation for safe use:
EVMs are not to be used as all or part of a production unit.
www.ti.com General Texas Instruments High Voltage Evaluation (TI HV EVM) User Safety Guidelines
SBOU251 – OCTOBER 2020
Submit Document Feedback
INA280EVM 3
Copyright © 2020 Texas Instruments Incorporated

2 Overview
The INA280-Q1 device is a voltage-output, high-side current sense amplifier with an enable pin in a very-small
SC-70 (5) package. As shown in Table 2-1, the INA280 has gains that range from 20 V/V to 500 V/V, depending
on the gain option that is selected. The voltage developed across the device inputs is amplified by the
corresponding gain of the specific device, and is presented at the output pin. The device can accurately sense
voltage drops across shunts at 2.7-V to +110-V common-mode voltages, dependent of supply voltages. The
device survives common-mode voltages from –20 V to +120 V. The device operates with supply voltages
between 2.7 V and 20 V, and draws a typical of 350 µA at room temperature.
Table 2-1. INA280 Gain Option Summary
Product(1) Gain (V/V)
INA280A1 20
INA280A2 50
INA280A3 100
INA280A4 200
INA280A5 500
(1) INA280B-Q1 is a preview device.
2.1 EVM Kit Contents
Table 2-2 summarizes the contents of the INA280EVM kit. Contact the nearest Texas Instruments Product
Information Center if any component is missing. TI also recommends to check the INA280 device product folder
at www.ti.com for any further information regarding this product.
Table 2-2. INA280EVM Kit Contents
Item Item Part Number Quantity
INA280EVM test board INA280EVM 1
2.2 Related Documentation From Texas Instruments
This document provides information regarding Texas Instruments' integrated circuits used in the assembly of the
INA280EVM.
Table 2-3. Related Documentation
Document Literature Number
INA280 product data sheet SBOSA19
Overview www.ti.com
4INA280EVM SBOU251 – OCTOBER 2020
Submit Document Feedback
Copyright © 2020 Texas Instruments Incorporated

3 Hardware
The INA280EVM provides a basic functional evaluation of the INA280. The fixture layout is not intended to be a
model for the target circuit, nor is it laid out for electromagnetic compatibility (EMC) testing. The INA280EVM is
one PCB with five optional PCB cutouts the engineer can use to test each of the five gain options (1 to 5) listed
in Table 2-1. Each PCB cutout has one INA280 n device (where n is 1, 2, 3, 4, or 5), test points and sockets for
external hardware connections, and pads to solder down optional circuitry.
3.1 Features
The INA280EVM PCB provides the following features:
• Evaluation of all gain options through provided device boards
• Ease of access to device pins with test points
• Pads and sockets for optional filtering at the input pins and output pin
• Multiple input signal options, including a method to solder a shunt resistor (2512) and safely measure current
up to 5 A.
See the device data sheet for comprehensive information about the INA280 and the available gain options.
www.ti.com Hardware
SBOU251 – OCTOBER 2020
Submit Document Feedback
INA280EVM 5
Copyright © 2020 Texas Instruments Incorporated

4 Operation
4.1 Quick Start Setup
Follow these procedures to set up and use one of the INA280EVM panels. For these instructions, n is gain
option 1, 2, 3, 4, or 5.
1. Choose the desired gain option panel variation.
2. Connect an external DC supply voltage (between 2.7 V and 20 V) to a VS test point. Connect the ground
reference of that supply to a GND test point on the same panel.
3. Provide a differential input voltage signal to the Vin+ and Vin– nodes by connecting the signal leads to the
J1_n pin 1 and J1_n pin 2 on the EVM, as explained in Section 4.2. The INA280 is a unidirectional current-
sensing device because there is no reference pin. The device can only measure current in one direction.
4.2 Measurements
The user can either emulate the voltage developed across a sense resistor based on a given set of system
conditions with the INA280EVM, or connect the device inputs to an external shunt. The user can also solder a
surface-mount technology (SMT) shunt resistor across the Vin+ and Vin– pads, and these inputs can be
connected in series with the external system and load.
To configure a measurement evaluation without a shunt resistor, follow this procedure:
1. Connect a positive differential voltage across the Vin+ (J1_n) and Vin– (J1_n) tabs. Given the internal GND
reference of the device, make sure that the Vin+ pin is the more positive of the two inputs.
2. Connect a 2.7-V to 110-V common-mode voltage to the inputs if the differential voltage supply is a floating
supply. Connect the positive lead of the external voltage source to the Vin– (J1_n) tab and source ground to a
GND test point. The minimum common-mode voltage should be >VS. This action effectively raises the
absolute common-mode voltage of the input pins, while still retaining a positive input differential signal.
3. Measure the output voltage at the Vout test point with respect to GND.
To configure a measurement evaluation with a shunt resistor, follow this procedure:
1. Solder a 2512 resistor at the R1_n pads that connects the Vin+ (J1_n) and Vin– (J1_n) inputs.
2. Connect the Vin+ (J1_n) and Vin– (J1_n) tabs in series with the load and bus voltage sources while powered
off.
WARNING
Make sure that the equipment (shunt resistor, wires, connectors, and so on) can support the
amperage and power dissipation first before you measure the current. Also make sure that the
current flowing through J1 does not exceed 5 A. Failure to do so can result in hot surfaces (>
55°C), damage to the EVM, or personal injury.
3. Power on the system and measure the output voltage at the Vout test point. Vout is equal to the gain of the
device multiplied by the differential voltage measured directly at the device input pins.
Operation www.ti.com
6INA280EVM SBOU251 – OCTOBER 2020
Submit Document Feedback
Copyright © 2020 Texas Instruments Incorporated

5 EVM Components
This section summarizes the INA280EVM components. For these instructions, n is gain option 1, 2, 3, 4, or 5.
5.1 R2_An, R3_An, R4_An, C2_An, C3_An
R2_An, R3_An, R4_An, are factory-installed 0-Ω 0603 resistors.
C2_An, C3_An, are not populated.
Collectively, these pads allow user-defined filters for the input pins (IN+ and IN–) and the output pin (OUT) of the
INA280. If a filter is desired, remove these resistors and replace them with > 0-Ω SMT resistors and populate the
capacitor pads with capacitors. Consider the input bias current of the device when using input filtering.
5.2 C1_An
C1_An is a 0.1-µF, power-supply bypass capacitor.
5.3 R1_An
R1_An is unpopulated, but allows the user to solder down a surface-mount shunt resistor between the Vin+ and
Vin– pads sensed by IN+ and IN– input pins. If used, make sure R1_An has proper power dissipation for the
selected current load. The chosen resistor must have a 2512 footprint.
5.4 U1_An (INA280)
U1_An is the location for the INA280An test device.
Consider these factors when selecting the appropriate device gain:
• The differential input voltage is either applied across the inputs or developed based on the load current that
flows through the shunt resistor.
• Make sure that the output voltage does not exceed the supply voltage. This limiting factor requires attention
to device selection.
• The selected device must allow the output voltage to remain within the acceptable range after the developed
input voltage is amplified by the respective device gain. The output voltage must remain within the device-
specified swing limitations for response in the linear range.
• An output below the minimum allowable output requires a device with a higher gain. Likewise, an output
above the maximum allowable output requires a device with a lower gain.
www.ti.com EVM Components
SBOU251 – OCTOBER 2020
Submit Document Feedback
INA280EVM 7
Copyright © 2020 Texas Instruments Incorporated

6 Schematic, PCB Layout, and Bill of Materials
Note
Board layouts are not to scale. These figures are intended to show how the board is laid out. They are
not intended to be used for INA280EVM PCB manufacturing.
6.1 Schematics
Figure 6-1 through Figure 6-5 show the schematics for the A pinout of the INA280EVM PCB for all gain options.
Figure 6-1. INA280EVM Schematic: Gain A1 Panel
Figure 6-2. INA280EVM Schematic: Gain A2 Panel
Schematic, PCB Layout, and Bill of Materials www.ti.com
8INA280EVM SBOU251 – OCTOBER 2020
Submit Document Feedback
Copyright © 2020 Texas Instruments Incorporated

Figure 6-3. INA280EVM Schematic: Gain A3 Panel
Figure 6-4. INA280EVM Schematic: Gain A4 Panel
www.ti.com Schematic, PCB Layout, and Bill of Materials
SBOU251 – OCTOBER 2020
Submit Document Feedback
INA280EVM 9
Copyright © 2020 Texas Instruments Incorporated

Figure 6-5. INA280EVM Schematic: Gain A5 Panel
Schematic, PCB Layout, and Bill of Materials www.ti.com
10 INA280EVM SBOU251 – OCTOBER 2020
Submit Document Feedback
Copyright © 2020 Texas Instruments Incorporated

6.2 PCB Layout
Figure 6-6 through Figure 6-12 show the PCB layout for the INA280EVM.
Figure 6-6. INA280EVM Top Overlay Figure 6-7. INA280EVM Bottom Overlay
Figure 6-8. INA280EVM Top Layer Figure 6-9. INA280EVM Bottom Layer
www.ti.com Schematic, PCB Layout, and Bill of Materials
SBOU251 – OCTOBER 2020
Submit Document Feedback
INA280EVM 11
Copyright © 2020 Texas Instruments Incorporated

Figure 6-10. INA280EVM Top Solder Figure 6-11. INA280EVM Bottom Solder
Figure 6-12. INA280EVM Drill Drawing
Schematic, PCB Layout, and Bill of Materials www.ti.com
12 INA280EVM SBOU251 – OCTOBER 2020
Submit Document Feedback
Copyright © 2020 Texas Instruments Incorporated

6.3 Bill of Materials
Table 6-1 provides the parts list for the INA280EVM.
Table 6-1. Bill of Materials
Designator QTY Value Description Package Reference Part Number Manufacturer
C1_A1, C1_A2, C1_A3, C1_A4,
C1_A5
5 0.1uF CAP, CERM, 0.1 uF, 25 V, +/- 10%, X7R, AEC-Q200 Grade 1,
0603
0603 CGA3E2X7R1E104K080A
A
TDK
H1_A1, H1_A2, H1_A3, H1_A4,
H1_A5, H2_A1, H2_A2, H2_A3,
H2_A4, H2_A5, H3_A1, H3_A2,
H3_A3, H3_A4, H3_A5, H4_A1,
H4_A2, H4_A3, H4_A4, H4_A5
20 Bumpon, Cylindrical, 0.312 X 0.200, Black Black Bumpon SJ61A1 3M
J1_A1, J1_A2, J1_A3, J1_A4,
J1_A5
5 Terminal Block, 3.5mm Pitch, 2x1, TH 7.0x8.2x6.5mm ED555/2DS On-Shore Technology
R2_A1, R2_A2, R2_A3, R2_A4,
R2_A5, R3_A1, R3_A2, R3_A3,
R3_A4, R3_A5, R4_A1, R4_A2,
R4_A3, R4_A4, R4_A5
15 0 RES, 0, 5%, 0.125 W, 0603 0603 MCT06030Z0000ZP500 Vishay/Beyschlag
TP1_A1, TP1_A2, TP1_A3,
TP1_A4, TP1_A5, TP2_A1,
TP2_A2, TP2_A3, TP2_A4,
TP2_A5, TP3_A1, TP3_A2,
TP3_A3, TP3_A4, TP3_A5,
TP4_A1, TP4_A2, TP4_A3,
TP4_A4, TP4_A5
20 Test Point, Miniature, SMT Testpoint_Keystone_Miniature 5015 Keystone
U1_A1 1 INA280A1IDCKR, DCK0005A (SOT-SC70-5) DCK0005A INA280A1IDCKR Texas Instruments
U1_A2 1 INA280A2IDCKR, DCK0005A (SOT-SC70-5) DCK0005A INA280A2IDCKR Texas Instruments
U1_A3 1 INA280A3IDCKR, DCK0005A (SOT-SC70-5) DCK0005A INA280A3IDCKR Texas Instruments
U1_A4 1 INA280A4IDCKR, DCK0005A (SOT-SC70-5) DCK0005A INA280A4IDCKR Texas Instruments
U1_A5 1 INA280A5IDCKR, DCK0005A (SOT-SC70-5) DCK0005A INA280A5IDCKR Texas Instruments
C2_A1, C2_A2, C2_A3, C2_A4,
C2_A5
0 0.1uF CAP, CERM, 0.1 uF, 25 V, +/- 10%, X7R, AEC-Q200 Grade 1,
0603
0603 CGA3E2X7R1E104K080A
A
TDK
C3_A1, C3_A2, C3_A3, C3_A4,
C3_A5
0 100pF CAP, CERM, 100 pF, 50 V, +/- 10%, X7R, 0603 0603 CL10B101KB8NNNC Samsung Electro-Mechanics
FID1, FID2, FID3 0 Fiducial mark. There is nothing to buy or mount. N/A N/A N/A
R1_A1, R1_A2, R1_A3, R1_A4,
R1_A5
0 0.01 RES, 0.01, 1%, 3 W, 2512 2512 CRA2512-FZ-R010ELF Bourns
www.ti.com Schematic, PCB Layout, and Bill of Materials
SBOU251 – OCTOBER 2020
Submit Document Feedback
INA280EVM 13
Copyright © 2020 Texas Instruments Incorporated

IMPORTANT NOTICE AND DISCLAIMER
TI PROVIDES TECHNICAL AND RELIABILITY DATA (INCLUDING DATASHEETS), DESIGN RESOURCES (INCLUDING REFERENCE
DESIGNS), APPLICATION OR OTHER DESIGN ADVICE, WEB TOOLS, SAFETY INFORMATION, AND OTHER RESOURCES “AS IS”
AND WITH ALL FAULTS, AND DISCLAIMS ALL WARRANTIES, EXPRESS AND IMPLIED, INCLUDING WITHOUT LIMITATION ANY
IMPLIED WARRANTIES OF MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE OR NON-INFRINGEMENT OF THIRD
PARTY INTELLECTUAL PROPERTY RIGHTS.
These resources are intended for skilled developers designing with TI products. You are solely responsible for (1) selecting the appropriate
TI products for your application, (2) designing, validating and testing your application, and (3) ensuring your application meets applicable
standards, and any other safety, security, or other requirements. These resources are subject to change without notice. TI grants you
permission to use these resources only for development of an application that uses the TI products described in the resource. Other
reproduction and display of these resources is prohibited. No license is granted to any other TI intellectual property right or to any third
party intellectual property right. TI disclaims responsibility for, and you will fully indemnify TI and its representatives against, any claims,
damages, costs, losses, and liabilities arising out of your use of these resources.
TI’s products are provided subject to TI’s Terms of Sale (www.ti.com/legal/termsofsale.html) or other applicable terms available either on
ti.com or provided in conjunction with such TI products. TI’s provision of these resources does not expand or otherwise alter TI’s applicable
warranties or warranty disclaimers for TI products.
Mailing Address: Texas Instruments, Post Office Box 655303, Dallas, Texas 75265
Copyright © 2020, Texas Instruments Incorporated