ANALOG DEVICES EVAL-ADA8282 Evaluation Board User Guide

ANALOG DEVICES EVAL-ADA8282 Evaluation Board User Guide

FEATURES

• Ready SPI interface for setup and control

• Easy connection to test equipment
  EVALUATION KIT CONTENTS

• ADA8282CP-EBZ evaluation board

• 6 V, 2 A switching power source

EQUIPMENT NEEDED

• PC running Windows®
• USB 2.0 port
• SDP-B

SOFTWARE NEEDED

Analysis control evaluation (ACE) software
**DIGITAL PICTURE OF THE BOARD

**

GENERAL DESCRIPTION

The ADA8282CP-EBZ is designed to aid in the evaluation of the ADA8282 radar receive path analog front-end (AFE). The board connects to the system demonstration platform (SDP) for easy  configuration of registers through a serial peripheral interface (SPI) using the ACE evaluation software. The board provides headers to allow configuration using other platforms. It also includes on-board options to provide manual reset capability to the part.
This user guide provides quick start instructions for working with the board.
Full specifications for the ADA8282 are available in the product data sheet, which should be consulted in conjunction with this user guide when using the evaluation board.

EVALUATION BOARD HARDWARE

POWER SUPPLY
The ADA8282CP-EBZ comes with a wall-mountable switching power supply that provides a 6 V, 2 A maximum output. The supply may be connected to the rated 100 V ac to 240 V ac to provide power to the board.
The ADA8282 requires 3.3 V for both analog (AVDD) and digital (VIO) power. The evaluation board has an on-board ADP7118 (U3) regulator for this purpose. U3 directly supplies the power for AVDD. The user may opt to use U3 to provide power to VIO by placing a header at VIO_3V3.
The SDP requires a 5 V supply to properly control the board. This supply is derived from the on-board ADP7105 (U2). The 5V_EN header allows the user to enable or disable this supply. Positions for the shunt to enable or disable are indicated on the board. U2 may be disabled if a different external controller is used.

ANALOG INPUTS
Each input is configured with SMA ports, +JIN x and –JIN x (where x stands for Channel A, Channel B, Channel C, or Channel D), and terminated with 50 Ω for easy interfacing to source equipment. The inputs are ac-coupled through 0.1 µF capacitors to the ADA8282. Use P1INx (where x stands for Channel A, Channel B, Channel C, or Channel D) to short any two differential lines together. The inputs of the ADA8282 are intended to be driven by a differential signal source. The output signal swing is reduced by a factor of 2 when driven by a single-ended source.

ANALOG OUTPUTS
Each output is configured with SMA ports, +JOUT x and −JOUT x (where x stands for Channel A, Channel B, Channel C, or Channel
D), which allows easy interfacing to equipment. Components are included for high-pass filtering at the output.

RESET LOGIC INPUT
A switch to control the RESET pin of the ADA8282 is available on the board. The switch position to reset the board is indicated on the evaluation board.

DIGITAL LINES
The SDP-B is used to provide digital signals to configure the ADA8282. Short the SPI headers to use the SDP. If an external controller is used to generate the digital signals, the signals can be ported through the SPI header.

JUMPER CONFIGURATIONS
The jumper settings/link options on the evaluation board for the required operating modes are described in Table 1. Figure 2 shows the default jumper settings.
Figure 2. Default Evaluation Board Configuration

SPI| SPI lines. Short all jumpers to configure the registers via the SDP.
---|---
VIO_3V3| Digital supply pin, VIO. Short the jumper to supply the VIO pin of the ADA8282 with the on-board regulator supply of 3.3 V.
5V_ENBL| 5 V supply enable. Place a shunt at Position 1 to enable the 5 V on-board regulator. Place the shunt at Position 3 to disable the 5 V on‑board regulator. Correct positions are indicated on the board.
RESET| This switch provides the required logic level to reset the device through hardware. To reset, follow the indicated position on the board.

EVALUATION BOARD SOFTWARE QUICK START PROCEDURES

This section provides quick start procedures and software information for using the ADA8282CP-EBZ board.

EVALUATION BOARD SOFTWARE
To use the board with the SDP-B, make sure that the ACE software is available on your computer. The software installer and a comprehensive user guide for the tool are available on the ACE Wiki.

QUICK START PROCEDURES
Figure 6 shows the typical evaluation board setup for the
ADA8282CP-EBZ. Complete the following steps to enable functionality testing of the part:

1. Configure the jumpers as shown in Figure 2.
2. Connect the SDP connector on the ADA8282CP-EBZ to Connector A of the SDP-B.
3. Connect the 6 V power supply to the board at P2 and connect to a power source.
4. Plug the USB cable into the USB port.
5. Run the ACE software.
6. Upon running the software, the hardware should automatically be detected **(see Figure 3).

**

7. Double-click the ADA8282 evaluation board plug-in to navigate to the ACE board view **(see Figure 4).

**

8. Double-click the ADA8282 component on the board to navigate to the chip view (see Figure 5).
   
   Click the tabs to select a previous or different view

9. Write a data byte of 0x0F to Register 0x17 to enable all channels of the device, using any of the configuration methods discussed in the Configuring the ADA8282 Through ACE section.

10. Power up the signal generator and check the waveform through the oscilloscope. The default gain is 18 dB for all channels.
    Figure 6. Typical Evaluation Setup
    

EVALUATION BOARD SOFTWARE QUICK START PROCEDURES

CONFIGURING THE ADA8282 THROUGH ACE

The ACE software provides several views or interfaces for configuring the ADA8282 via the SDP-B. Raw SPI writes and reads may be done through the register debugger. The chip view provides a more graphical approach to configuring the ADA8282, while the memory map provides users with the option to change register settings bit by bit.
USING THE REGISTER DEBUGGER
Raw SPI data writes and reads may be performed on the device using the register debugger. The register debugger can be accessed on ACE through the side bar under Tools. To write to the device, complete the following steps:

1. Select the address from the Address drop-down menu on the register debugger (see **Figure 7).

**

2. Enter the data to be written to the device in the Data text box and click Write **(see Figure 8).

**

To read from the device, complete the following steps:

1. Select the address from the Address drop-down menu.
2. Click Read **(see Figure 9)

**

USING THE ACE SOFTWARE CHIP VIEW
The ACE software provides a chip view for the ADA8282. This allows the user to configure the part graphically. Enabling or disabling channels, along with gain manipulation, can be accomplished using the chip view.
To enable or disable a channel, click the channel of interest. An enabled channel is highlighted in blue, while a disabled channel is grayed out. In Figure 10 ,

Channel A is enabled, while the rest of the channels are disabled

The ADA8282 gain is implemented using two internal gain stages. The first stage is an LNA with a default gain of +24 dB, and the second stage is a PGA with a gain that varies from −6 dB to +12 d B. To manipulate the total gain of a channel, select the desired PGA gain on the PGA section as shown in Figure 11. Note that only the gain of enabled channels may be changed **(see Figure 11).

**

To write the preferred settings to the registers of the device, click Apply Changes on the toolbar **(see Figure 12).

**

USING THE ACE MEMORY MAP

The memory map for the ADA8282 can be accessed by clicking the Proceed to Memory Map found on the lower right portion of the chip view (see Figure 5). The memory map view can show either the register fields or the bit fields of the device.
The register view allows the user to manipulate the bits one by one. Each register may be expanded to show its corresponding bit fields for easier configuration. To enable a channel, configure Register 0x17 (enchain). To change the total gain of a channel, configure Register 0x15 (pga_gain). For more details regarding the register settings, refer to the ADA8282 data sheet.
Clicking a bit toggles its value **(see Figure 13).

**

The bit field view allows the user to configure the ADA8282 by modifying its control values. The hexadecimal data is displayed in the Data (Hex) column.
Figure 14. Bit Field View

As with the chip view, the desired setting of the registers is only written to the ADA8282 when Apply Changes is clicked.
For more detailed information on using the ACE software, see the ACE Wiki.

ADA8282 REGISTER SUMMARY
The register settings for the ADA8282 are given in the register section of the ADA8282 data sheet. An abbreviated register summary is shown in Table 2.

Table 2. ADA8282 Register Summary

EVALUATION BOARD SCHEMATICS AND ARTWORK

**Figure 15. Input Schematic

Figure 16. Output Schematic

Figure 17. DUT Schematic

Figure 18. Power Section Schematic

Figure 19. SDP Schematic

Figure 20. Evaluation Board Layout, Layer 1

Figure 21. Evaluation Board Layout, Layer 2

Figure 22. Evaluation Board Layout, Layer 3

Figure 23. Evaluation Board Layout, Layer 4

**

ORDERING INFORMATION

BILL OF MATERIALS
Table 3.

Item| Qty| Reference Designator| Description| Manufacturer| Part
Number
---|---|---|---|---|---
1| 1| U1| IC 32 kB serial EEPROM| Microchip Technology| 24LC32A-I/ST
---|---|---|---|---|---
2| 1| U2| 500 mA, low noise regulator| Analog Devices, Inc.| ADP7105ARDZ-5.0
3| 1| U3| Low noise linear regulator| Analog Devices, Inc.| ADP7118ARDZ-3.3
4| 1| U4| IC-TTL bus buffer| NXP Semiconductors| 74HC1G125GW
5| 1| U5| 4-channel LNA and PGA| Analog Devices, Inc.| ADA8282WBCPZ
6| 8| +JINA, +JINB, +JINC, +JIND, −JINA, −JINB,| End launch SMA| Johnson| 142-0701-801
| | −JINC, −JIND| | |
7| 8| +JOUTA, +JOUTB, +JOUTC, +JOUTD,| Straight SMA| Johnson| 142-0701-201
| | −JOUTA, −JOUTB, −JOUTC, −JOUTD| | |
8| 1| 5V_EN| 3-pin header| Samtec| TSW-103-08-G-S
9| 2| C1, C7| 10 µF, 100 V tantalum capacitor| Kemet| T491D106K025AT
10| 14| C2 to C6, C10, C1INA, C1INB, C1INC,| 0.1 µF, X7R, 50 V, 0805 capacitor| Kemet| C0805C104J5RACTU
| | C1IND, C2INA, C2INB, C2INC, C2IND| | |
11| 1| C12| 1 µF, 25 V, 0805 capacitor| Murata| NFM21PC105B1C3B
12| 4| C8, C9, C13, C14| 1 µF, X5R, 6.8 V, 0603 capacitor| Murata| GRM188R61E105KA12D
13| 4| C1OUTA, C1OUTB, C1OUTC, C1OUTD| 5 pF, C0G, 2.2 V, 0805 capacitor| Murata| GQM2195C2A5R0CB01D
14| 8| C2OUTA, C2OUTB, C2OUTC, C2OUTD,| 1 µF, X7R, 0805 capacitor| AVX| 08051C104JAT2A
| | C3OUTA, C3OUTB, C3OUTC, C3OUTD| | |
15| 1| C39| 10 µF, 13.2 V tantalum capacitor| AVX| TAJA106K010RNJ
16| 1| C40| 1 µF, X8R, 0603 capacitor| TDK| C1608X8R1E104K
17| 1| CR1| Zener| Micro Commercial Components| SMBJ5342B-TP
18| 2| DS1, DS2| LED| Lumex| SML-LX0603GW-TR
19| 1| E1| Ferrite bead, 330 Ω, 0805| Murata| BLM21PG331SN1D
20| 1| F1| Fuse, 50 V| Littelfuse| 1210L050YR
21| 12| P1INA, P1INB, P1INC, P1IND, P1OUTA,| 2-pin header| Berg| 69157-102
| | P1OUTB, P1OUTC, P1OUTD, P2OUTA,| | |
| | P2OUTB, P2OUTC, P2OUTD| | |
22| 1| P2| Power jack| CUI Inc.| PJ-002A-SMT
23| 8| R1INA, R1INB, R1INC, R1IND, R2INA,| SM, 49.9 Ω, 1%, 1/10 W, 0805| Panasonic| ERJ-6ENF49R9V
| | R2INB, R2INC, R2IND| resistor| |
24| 10| R5, R7, R1OUTA, R1OUTB, R1OUTC,| SM, 0 Ω, 1%, 1/16 W, 0805 resistor| Panasonic| ERJ-6GEY0R00V
| | R1OUTD, R2OUTA, R2OUTB, R2OUTC,| | |
| | R2OUTD| | |
25| 2| R2, R3| SM, 100 kΩ, 1%, 1/10 W, 0603| Panasonic| ERJ-3EKF1003V
| | | resistor| |
26| 8| R3OUTA, R3OUTB, R3OUTC, R3OUTD,| SM, 5 kΩ, 0805 resistor| Vishay| PNM0805E5001BST5
| | R4OUTA, R4OUTB, R4OUTC, R4OUTD| | |
27| 1| R4| SM, 1 kΩ, 0603 resistor| Panasonic| ERJ-3EKF1001V
28| 1| R6| SM, 165 Ω, 0603 resistor| Panasonic| ERJ-3EKF1650V
29| 4| R60 to R63| SM, 33 Ω, 0603 resistor| Multicomplex| MC 0.063W 0603 1% 33R
30| 1| R71| SM, 49.9 kΩ, 0603 resistor| Panasonic| ERJ-3EKF4992V
31| 1| RESET| Slide switch| Seema| 09-03-201-02
32| 1| SDP| SDP connector| Hirose| FX8-120S-SV(21)
33| 1| SPI| 8-pin header| SimTech| TSW-104-08-G-D
34| 1| TP_VIO| Test point| Vector| K24A
35| 1| VIO_3V3| 2-pin header| SimTech| TSW-102-08-G-S

ORDERING INFORMATION

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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