Mixed-signal and digital signal processing ICs | Analog DevicesAD8410A Datasheet and Product Info | Analog DevicesEVAL-AD8410A Evaluation Board | Analog Devices
User Guide for ANALOG DEVICES models including: AD8410AR-EVALZ, AD8410ARM-EVALZ, AD8410A Current Sense Amplifier Evaluation Board, AD8410A, Current Sense Amplifier Evaluation Board, Sense Amplifier Evaluation Board, Amplifier Evaluation Board, Evaluation Board, Board
AD8410A Datasheet and Product Info | Analog Devices
File Info : application/pdf, 7 Pages, 1.43MB
DocumentDocumentUser Guide | EVAL-AD8410A
UG-2083
Evaluating the AD8410A, -2 V to 70 V Wide Input Voltage Range, 2.2 MHz High Bandwidth, Current-Sense Amplifier with PWM Rejection
FEATURES
Enables quick breadboarding and prototyping Easily configurable for unidirectional or bidirectional operation Includes provision for current-sense shunt resistor Easy connection to test equipment Includes provisions for an input filter and an output filter Decoupled supply line
EVALUATION KIT CONTENTS
AD8410AR-EVALZ evaluation board AD8410ARM-EVALZ evaluation board
DOCUMENTS NEEDED
AD8410A data sheet
GENERAL DESCRIPTION
This user guide is designed to aid in the evaluation of the AD8410A current-sense amplifier. The AD8410AR-EVALZ and the AD8410ARM-EVALZ are designed for easy configuration of different modes of operation and allow flexibility with loads. A shunt resistor (R1), with a maximum standard size of 2818, can be soldered to both boards.
The AD8410AR-EVALZ accommodates the AD8410A in a standard small outline package (SOIC_N). The AD8410ARM-EVALZ accommodates the AD8410A in a mini small outline package (MSOP). The AD8410ARM-EVALZ and AD8410AR-EVALZ are hereafter referred to as the AD8410A evaluation board in this user guide.
Full specifications on the AD8410A are available in the AD8410A data sheet available from Analog Devices, Inc., and must be consulted with this user guide when using the AD8410A evaluation board.
PLEASE SEE THE LAST PAGE FOR AN IMPORTANT WARNING AND LEGAL TERMS AND CONDITIONS.
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User Guide
TABLE OF CONTENTS
Features................................................................ 1 Evaluation Kit Contents......................................... 1 Documents Needed...............................................1 General Description...............................................1 AD8410A Evaluation Board Photographs............. 3 Quick Start.............................................................4
Power Supplies.................................................. 4
EVAL-AD8410A
Components....................................................... 4 Setting the Reference Voltage............................4 Input Filter.......................................................... 5 AD8410A Evaluation Board Schematic................. 6 Ordering Information..............................................7 Bill of Materials................................................... 7
REVISION HISTORY
8/2023--Rev. 0 to Rev. A Changes to Evaluation Kit Contents Section................................................................................................... 1 Changes to General Description Section.........................................................................................................1 Changed AD8410AR-EVALZ Evaluation Board Photographs Section to AD8410A Evaluation Board
Photographs Section......................................................................................................................................3 Added Figure 3 and Figure 4; Renumbered Sequentially................................................................................3 Changes to Quick Start Section.......................................................................................................................4 Change to Power Supplies Section................................................................................................................. 4 Changes to Components Section.................................................................................................................... 4 Changes to Setting the Reference Voltage Section.........................................................................................4 Changes to Unidirectional Operation Section.................................................................................................. 4 Changes to Bidirectional Operation Section.................................................................................................... 4 Change to External Referenced Output Section..............................................................................................5 Changes to Input Filter Section........................................................................................................................5 Changed Evaluation Board Schematic Section to AD8410A Evaluation Board Schematic Section................6 Changes to Figure 6 Caption........................................................................................................................... 6 Changes to Table 4.......................................................................................................................................... 7
2/2023--Revision 0: Initial Version
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User Guide
AD8410A EVALUATION BOARD PHOTOGRAPHS
EVAL-AD8410A
Figure 1. AD8410AR-EVALZ Top View
Figure 3. AD8410ARM-EVALZ Top View
Figure 2. AD8410AR-EVALZ Bottom View
Figure 4. AD8410ARM-EVALZ Bottom View
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User Guide
QUICK START
By default, VREF1 is connected to VS and VREF2 is connected to the GND pin. This split supply configuration sets the output to midsupply and allows bidirectional current sensing. Connect 5 V to the VS test point on the AD8410A evaluation board, connect the ground of the supply to the AGND test point on the AD8410A evaluation board, and place a 0.1 V differential voltage between the +VIN test point and the -VIN test point on the AD8410A evaluation board. This small 0.1 V differential input voltage represents the voltage drop across the shunt resistor that is used in the application.
VOUT = 2.5V+ VDIFF × GAIN
(1)
After the AD8410A evaluation board is powered, the output reads as:
4.5V = 2.5V+ 0.1V×20V/V
(2)
Then swap the input differential voltage leads (move the lead on the +VIN test point to the -VIN test point and move the lead that was on the -VIN test point to the +VIN test point). The output then reads as:
0.5V = 2.5V- 0.1V×20V/V
(3)
POWER SUPPLIES
The AD8410A has a power-supply operating range from 2.9 V to 5.5 V. Power is applied to the VS test point. Decoupling capacitors of 10 µF and 0.1 µF are preinstalled on the AD8410A evaluation board.
Figure 5. Connections to Terminal Blocks
COMPONENTS
The AD8410A can be used for a variety of current monitoring applications. The AD8410A evaluation board has a provision for a current-sense shunt resistor with a maximum standard size of 2818. There are also provisions with 0805 footprints for a capacitive-load, a resistive load, an input electromagnetic interference (EMI) filter, an output filter, and provisions to set the reference voltage. Terminal blocks (P1 and P2) are provided to allow easy wiring and evaluation.
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EVAL-AD8410A
SETTING THE REFERENCE VOLTAGE
Three resistor spaces (R8, R9, and R10) are on the right side of the AD8410A on the AD8410A evaluation board. These three resistors are used to set VREF1. Fill only one of these resistor spaces at a time with a 0 , 0805 resistor. See Table 1 for the resistor spaces that must be filled with 0 to set VREF1.
Three resistor spaces (R5, R6, and R7) are on the left side of the AD8410A on the AD8410A evaluation board. These three resistors are used to set VREF2. Fill only one of these resistor spaces at a time with a 0 , 0805 resistor. See Table 2 for the resistor spaces that must be filled with 0 to set VREF2.
Table 1. VREF1 Pin Connections
Pin
R8
R9
R10
VS
GND
EXT1
Table 2. VREF2 Pin Connections
Pin
R5
R6
R7
VS
GND
EXT2
Unidirectional Operation
For unidirectional operation, the output can be set at the negative rail (near ground) or at the positive rail (near the supply voltage) when the differential voltage is 0 V. To set the AD8410A evaluation board for a ground referenced output, solder the 0 resistor on the left side of the AD8410A in the R6 space and the 0 resistor on the right side of the AD8410A in the R9 space.
To set the AD8410A evaluation board for a supply voltage referenced output, solder the 0 resistor on the left side of the AD8410A in the R7 space and the 0 resistor on the right side of the AD8410A in the R10 space.
Bidirectional Operation
For bidirectional operation, the output is typically set at half scale for equal range in both directions. To configure the output to be at midsupply in the presence of 0 A of current through the shunt resistor on the AD8410A evaluation board, solder the 0 resistor on the left side of the AD8410A in the R6 space and the 0 resistor on the right side of the AD8410A in the R10 space.
By default, the output of the AD8410A evaluation board is biased at midsupply.
Table 3 shows which resistor must be filled with 0 resistor to set the AD8410A evaluation board for different operations. In unidirectional operation, it can be ground referenced output and supply
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User Guide
QUICK START
voltage-referenced output whereas in the bidirectional operation, the output can be set to midsupply.
Table 3. Operation Connection
Mode
R6
R7
R9
R10
UNIDIRECTIONAL
Ground Referenced
Supply Voltage Referenced
BIDIRECTIONAL Midsupply
External Referenced Output
An external supply can also be used to set the reference voltage. To bias the output to a single external supply, solder a 0 , 0805 resistor in the R4 space. Then, solder the 0 resistor on the left side of the AD8410A in the R5 space and solder the 0 resistor on the right side of the AD8410A in the R8 space. The external supply voltage can then be applied to any one of the EXTx test points on the AD8410A evaluation board, and this configuration biases the output to the external supply.
The external supply can also be divided by 2 and used as a reference level. For this reference level, solder the 0 resistor on the left side of the AD8410A in the R6 space, desolder the resistor in the R4 space, and solder the 0 resistor on the right side of the AD8410A in the R8 space. Apply the external supply to the EXT1 test point or EXT1 terminal block input, and the output of the AD8410A is referenced to half of the external supply.
Two separate external supplies can also be used to set the reference for the output. Desolder the 0 resistor from the R4 space. Solder the 0 resistor on the left side of the AD8410A in the R5 space and solder the 0 resistor on the right side of the AD8410A in the R8 space. Apply the first external supply, VEXT1, to the EXT1 test point or EXT1 terminal block input. Apply the second external supply, VEXT2, to the EXT2 test point or EXT2 terminal block input. This configuration references the output to:
VEXT1 + VEXT2 2
(4)
INPUT FILTER
The AD8410A evaluation board includes provisions for the components necessary for an input filter. By default, R2 and R3 are 0
EVAL-AD8410A
, 0805 resistors and C1, C2, and C3 are left unpopulated. It is required to filter at the input of the device to reduce EMI. The EMI specifications vary depending on the application. Filtering at the input must be preferred if the output cannot be filtered because filtering at the output changes the low output impedance seen by the components attached to the output of the AD8410A. The +IN and IN inputs of the AD8410A have balanced input bias currents. This means that the input series resistors, R2 and R3, must be the same measured value to not have a large offset voltage added on the output of the device as a result of R2 and R3. It is recommended to keep R2 and R3 below 100 .
The EMI filter has two different bandwidths, common-mode (BWCM) and differential (BWDIFF). The differential bandwidth defines the frequency response of the filter with a differential input signal applied between the two inputs of the amplifier, which are +IN and -IN. C1 and C3 must be the same value for the following equations.
The -3 dB differential bandwidth for the filter is:
BWDIFF = 2 × R2 ×
1 2 × C2 + C1
(5)
The common-mode bandwidth defines what a common-mode RF signal experiences between ground and the +IN and IN inputs of the amplifier tied together.
The -3 dB common-mode bandwidth for the filter is:
BWCM
=
1 2 × R2 × C1
(6)
Keep the resistor values to a 1% tolerance and the filter capacitors to a 5% tolerance to assist with reducing AC common-mode rejection (CMR) errors. Choose C2 to be at least 10× larger than C1 or C3 to reduce AC CMR errors, which are caused by component mismatching.
Figure 1 shows the top view and Figure 2 shows the bottom view of the AD8410AR-EVALZ evaluation board. Figure 3 shows the top view and Figure 4 shows the bottom view of the AD8410ARMEVALZ evaluation board. Figure 6 shows the default schematic of the AD8410A evaluation board. The dotted lines in Figure 6 are routed under the printed circuit board (PCB).
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User Guide
AD8410A EVALUATION BOARD SCHEMATIC
EVAL-AD8410A
Figure 6. AD8410AR-EVALZ/AD8410ARM-EVALZ Evaluation Board Schematic
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User Guide
ORDERING INFORMATION
EVAL-AD8410A
BILL OF MATERIALS
Table 4. Bill of Materials
Item
Quantity
1
1
2
2
3
4
4
1
5
1
6
4
7
1
8
1
9
6
10
4
11
5
12
1
13
5
14
1
Reference Designator Part Description
Manufacturer, Part Number
U1
+VIN, -VIN AGND, GND1, GND2, GND3
IC, High voltage, high bandwidth, current-sense ampli- Analog Devices Inc., AD8410AWBRZ/
fier, automotive
AD8410AWBMRZ
Connectors-PCB, test point white
Keystone Electronics, 5002
Connectors-PCB, test point black
Keystone Electronics, 5001
C4
Capacitor, CER, 0.1 F, 50 V, 10%, X7R, 1206
C5
Capacitor, TANT, 10 F, 16 V, 10%, 3528-20
EXT1, EXT2, OUT, VS Connectors-PCB, test point red
P1
Connector-PCB, terminal block VERT, 5 mm pitch
P2
Connector-PCB, terminal block, 5 mm pitch, 3.5 mm
solder tail
R2, R3, R4, R6, R10, R11 Resistors, SMD, 0 , 1/10 W, 0805
Standard Grip
Miscellaneous, Bumper cylindrical, size 0.312" Dia (7.92 mm), thickness 0.215" (5.46 mm), black with adhesive
C1, C2, C3, C6, C7
Not installed, Capacitors, C0805
Yageo, CC1206KRX7R9BB104 AVX Corporation, TAJB106K016RNJ Keystone Electronics, 5000 On Shore Technology, OSTTC030162 On shore Technology, OSTTC040162
Multicomp (SPC), MC 0.1 W 0805 0R 3M, SJ61A6
Not Applicable
R1
Not installed, Resistor, 2818
Vishay, WSHM2818R0500FEA
R5, R7, R8, R9, R12 TP1
Not installed, Resistors, R0805 Connector-PCB, test point black
Not Applicable Keystone Electronics, 5001
ESD Caution ESD (electrostatic discharge) sensitive device. Charged devices and circuit boards can discharge without detection. Although this product features patented or proprietary protection circuitry, damage may occur on devices subjected to high energy ESD. Therefore, proper ESD precautions should be taken to avoid performance degradation or loss of
functionality.
Legal Terms and Conditions By using the evaluation board discussed herein (together with any tools, components documentation or support materials, the "Evaluation Board"), you are agreeing to be bound by the terms and conditions set forth below ("Agreement") unless you have purchased the Evaluation Board, in which case the Analog Devices Standard Terms and Conditions of Sale shall govern. Do not use the Evaluation Board until you have read and agreed to the Agreement. Your use of the Evaluation Board shall signify your acceptance of the Agreement. This Agreement is made by and between you ("Customer") and Analog Devices, Inc. ("ADI"), with its principal place of business at Subject to the terms and conditions of the Agreement, ADI hereby grants to Customer a free, limited, personal, temporary, non-exclusive, non-sublicensable, non-transferable license to use the Evaluation Board FOR EVALUATION PURPOSES ONLY. Customer understands and agrees that the Evaluation Board is provided for the sole and exclusive purpose referenced above, and agrees not to use the Evaluation Board for any other purpose. Furthermore, the license granted is expressly made subject to the following additional limitations: Customer shall not (i) rent, lease, display, sell, transfer, assign, sublicense, or distribute the Evaluation Board; and (ii) permit any Third Party to access the Evaluation Board. As used herein, the term "Third Party" includes any entity other than ADI, Customer, their employees, affiliates and in-house consultants. The Evaluation Board is NOT sold to Customer; all rights not expressly granted herein, including ownership of the Evaluation Board, are reserved by ADI. CONFIDENTIALITY. This Agreement and the Evaluation Board shall all be considered the confidential and proprietary information of ADI. Customer may not disclose or transfer any portion of the Evaluation Board to any other party for any reason. Upon discontinuation of use of the Evaluation Board or termination of this Agreement, Customer agrees to promptly return the Evaluation Board to ADI. ADDITIONAL RESTRICTIONS. Customer may not disassemble, decompile or reverse engineer chips on the Evaluation Board. Customer shall inform ADI of any occurred damages or any modifications or alterations it makes to the Evaluation Board, including but not limited to soldering or any other activity that affects the material content of the Evaluation Board. Modifications to the Evaluation Board must comply with applicable law, including but not limited to the RoHS Directive. TERMINATION. ADI may terminate this Agreement at any time upon giving written notice to Customer. Customer agrees to return to ADI the Evaluation Board at that time. LIMITATION OF LIABILITY. THE EVALUATION BOARD PROVIDED HEREUNDER IS PROVIDED "AS IS" AND ADI MAKES NO WARRANTIES OR REPRESENTATIONS OF ANY KIND WITH RESPECT TO IT. ADI SPECIFICALLY DISCLAIMS ANY REPRESENTATIONS, ENDORSEMENTS, GUARANTEES, OR WARRANTIES, EXPRESS OR IMPLIED, RELATED TO THE EVALUATION BOARD INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTY OF MERCHANTABILITY, TITLE, FITNESS FOR A PARTICULAR PURPOSE OR NONINFRINGEMENT OF INTELLECTUAL PROPERTY RIGHTS. IN NO EVENT WILL ADI AND ITS LICENSORS BE LIABLE FOR ANY INCIDENTAL, SPECIAL, INDIRECT, OR CONSEQUENTIAL DAMAGES RESULTING FROM CUSTOMER'S POSSESSION OR USE OF THE EVALUATION BOARD, INCLUDING BUT NOT LIMITED TO LOST PROFITS, DELAY COSTS, LABOR COSTS OR LOSS OF GOODWILL. ADI'S TOTAL LIABILITY FROM ANY AND ALL CAUSES SHALL BE LIMITED TO THE AMOUNT OF ONE HUNDRED US DOLLARS ($100.00). EXPORT. Customer agrees that it will not directly or indirectly export the Evaluation Board to another country, and that it will comply with all applicable United States federal laws and regulations relating to exports. GOVERNING LAW. This Agreement shall be governed by and construed in accordance with the substantive laws of the Commonwealth of Massachusetts (excluding conflict of law rules). Any legal action regarding this Agreement will be heard in the state or federal courts having jurisdiction in Suffolk County, Massachusetts, and Customer hereby submits to the personal jurisdiction and venue of such courts. The United Nations Convention on Contracts for the International Sale of Goods shall not apply to this Agreement and is expressly disclaimed.
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