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4

4

EVM Use Restrictions and Warnings:

4.1 EVMS ARE NOT FOR USE IN FUNCTIONAL SAFETY AND/OR SAFETY CRITICAL EVALUATIONS, INCLUDING BUT NOT

LIMITED TO EVALUATIONS OF LIFE SUPPORT APPLICATIONS.

4.2 User must read and apply the user guide and other available documentation provided by TI regarding the EVM prior to handling

or using the EVM, including without limitation any warning or restriction notices. The notices contain important safety information
related to, for example, temperatures and voltages.

4.3

Safety-Related Warnings and Restrictions:

4.3.1

User shall operate the EVM within TI’s recommended specifications and environmental considerations stated in the user
guide, other available documentation provided by TI, and any other applicable requirements and employ reasonable and
customary safeguards. Exceeding the specified performance ratings and specifications (including but not limited to input
and output voltage, current, power, and environmental ranges) for the EVM may cause personal injury or death, or
property damage. If there are questions concerning performance ratings and specifications, User should contact a TI
field representative prior to connecting interface electronics including input power and intended loads. Any loads applied
outside of the specified output range may also result in unintended and/or inaccurate operation and/or possible
permanent damage to the EVM and/or interface electronics. Please consult the EVM user guide prior to connecting any
load to the EVM output. If there is uncertainty as to the load specification, please contact a TI field representative.
During normal operation, even with the inputs and outputs kept within the specified allowable ranges, some circuit
components may have elevated case temperatures. These components include but are not limited to linear regulators,
switching transistors, pass transistors, current sense resistors, and heat sinks, which can be identified using the
information in the associated documentation. When working with the EVM, please be aware that the EVM may become
very warm.

4.3.2

EVMs are intended solely for use by technically qualified, professional electronics experts who are familiar with the
dangers and application risks associated with handling electrical mechanical components, systems, and subsystems.
User assumes all responsibility and liability for proper and safe handling and use of the EVM by User or its employees,
affiliates, contractors or designees. User assumes all responsibility and liability to ensure that any interfaces (electronic
and/or mechanical) between the EVM and any human body are designed with suitable isolation and means to safely
limit accessible leakage currents to minimize the risk of electrical shock hazard. User assumes all responsibility and
liability for any improper or unsafe handling or use of the EVM by User or its employees, affiliates, contractors or
designees.

4.4 User assumes all responsibility and liability to determine whether the EVM is subject to any applicable international, federal,

state, or local laws and regulations related to User’s handling and use of the EVM and, if applicable, User assumes all
responsibility and liability for compliance in all respects with such laws and regulations. User assumes all responsibility and
liability for proper disposal and recycling of the EVM consistent with all applicable international, federal, state, and local
requirements.

5.

Accuracy of Information:

To the extent TI provides information on the availability and function of EVMs, TI attempts to be as accurate

as possible. However, TI does not warrant the accuracy of EVM descriptions, EVM availability or other information on its websites as
accurate, complete, reliable, current, or error-free.

6.

Disclaimers:

6.1 EXCEPT AS SET FORTH ABOVE, EVMS AND ANY MATERIALS PROVIDED WITH THE EVM (INCLUDING, BUT NOT

LIMITED TO, REFERENCE DESIGNS AND THE DESIGN OF THE EVM ITSELF) ARE PROVIDED "AS IS" AND "WITH ALL
FAULTS." TI DISCLAIMS ALL OTHER WARRANTIES, EXPRESS OR IMPLIED, REGARDING SUCH ITEMS, INCLUDING BUT
NOT LIMITED TO ANY EPIDEMIC FAILURE WARRANTY OR IMPLIED WARRANTIES OF MERCHANTABILITY OR FITNESS
FOR A PARTICULAR PURPOSE OR NON-INFRINGEMENT OF ANY THIRD PARTY PATENTS, COPYRIGHTS, TRADE
SECRETS OR OTHER INTELLECTUAL PROPERTY RIGHTS.

6.2 EXCEPT FOR THE LIMITED RIGHT TO USE THE EVM SET FORTH HEREIN, NOTHING IN THESE TERMS SHALL BE

CONSTRUED AS GRANTING OR CONFERRING ANY RIGHTS BY LICENSE, PATENT, OR ANY OTHER INDUSTRIAL OR
INTELLECTUAL PROPERTY RIGHT OF TI, ITS SUPPLIERS/LICENSORS OR ANY OTHER THIRD PARTY, TO USE THE
EVM IN ANY FINISHED END-USER OR READY-TO-USE FINAL PRODUCT, OR FOR ANY INVENTION, DISCOVERY OR
IMPROVEMENT, REGARDLESS OF WHEN MADE, CONCEIVED OR ACQUIRED.

7.

USER'S INDEMNITY OBLIGATIONS AND REPRESENTATIONS.

USER WILL DEFEND, INDEMNIFY AND HOLD TI, ITS

LICENSORS AND THEIR REPRESENTATIVES HARMLESS FROM AND AGAINST ANY AND ALL CLAIMS, DAMAGES, LOSSES,
EXPENSES, COSTS AND LIABILITIES (COLLECTIVELY, "CLAIMS") ARISING OUT OF OR IN CONNECTION WITH ANY
HANDLING OR USE OF THE EVM THAT IS NOT IN ACCORDANCE WITH THESE TERMS. THIS OBLIGATION SHALL APPLY
WHETHER CLAIMS ARISE UNDER STATUTE, REGULATION, OR THE LAW OF TORT, CONTRACT OR ANY OTHER LEGAL
THEORY, AND EVEN IF THE EVM FAILS TO PERFORM AS DESCRIBED OR EXPECTED.

Summary of Contents for PGA2500EVMV2

Page 1: ...cuitry 10 4 7 Configurable Output Circuitry and Preamp Output Connector 10 5 Schematic PCB Layout and Bill of Materials 11 5 1 Schematic 11 5 2 PCB Layout 12 5 3 Bill of Materials 15 6 Software Operation 17 6 1 Applications Software Overview 17 6 2 Using the GUI 17 List of Figures Figure 1 1 PGA2500 Functional Block Diagram 2 Figure 1 2 PGA2500EVMV2 GUI 3 Figure 1 3 PGA2500 16 bit Control 3 Figure...

Page 2: ...tially at the VIN and VIN inputs pins 27 and 26 respectively The programmable gain amplifier can be programmed to either pass through the signal at unity gain or apply 10 dB to 65 dB of gain to the input signal The gain of the amplifier is adjustable over the full 10 dB to 65 dB range in 1 dB steps The differential output of the PGA2500 is made available at VOUT and VOUT pins 17 and 16 respectivel...

Page 3: ...al is then used to correct the offset The DC servo may be enabled by checking the DC Servo checkbox in the GUI To disable this function leave the DC Servo checkbox in the GUI unchecked Two external capacitors are required for the DC servo function with one capacitor connected between CS11 and CS12 pins 24 and 23 and the second capacitor connected between CS21 and CS22 pins 22 and 21 Capacitor valu...

Page 4: ...orced to unity Check the Unity Gain checkbox in the GUI to activate this function The zero crossing control input named ZCEN pin 9 is provided for enabling and disabling the internal zero crossing detector function Forcing the ZCEN input high enables the function check the ZCEN checkbox in the GUI to activate this function Zero crossing detection is used to force gain changes on zero crossings of ...

Page 5: ...ible output loading options LED indicators for GPOs and the over range output Common mode voltage input VCOMIN terminal Includes applications software which is compatible with most personal computers that have a built in USB port Requires 5 V and 5 V analog supplies as well as a 5 V digital supply The user may leave the 5 V digital supply VCC unconnected if using the MSP EXP430F5529LP www ti com F...

Page 6: ...ing and handling the EVM Failure to observe ESD handling procedures may result in damage to the EVM components 3 2 Unpacking the EVM In addition to the PGA2500EVMV2 evaluation module board order and unpack the MSP EXP430F5529LP MSP430F5529 USB LaunchPad development kit Plug in the MSP430 microcontroller on top of the PGA2500EVMV2 see Figure 3 1 Figure 3 1 PGA2500EVMV2 With MSP430 Microcontroller C...

Page 7: ...Supply Voltages VA VA VCOM VCC Phantom Power 5 5 V DC Maximum 5 5 V DC Maximum 0 3 V DC Minimum to VA 0 3 V DC Maximum 5 5 V DC Maximum 50 V DC Maximum Microphone Input J3 XLR or TRS Maximum Input Voltage Differential 20 VPP or 7 V RMS Maximum Preamplifier Output J6 Maximum Output Voltage Differential 17 5 VPP or 6 2 V RMS Maximum www ti com Getting Started SBOU257 JUNE 2021 Submit Document Feedba...

Page 8: ...00 microphone preamplifier integrated circuit The digital power supply VCC is left unconnected if using the MSP EXP430F5529LP An optional third analog power supply may be utilized for the PGA2500 common mode DC voltage input VCOMIN pin 25 VCOMIN allows the PGA2500 output and input to be DC biased to a common mode voltage between 0 and 2 5 V and is connected through terminal block J2 The common mod...

Page 9: ... The capacitors shown in the Bill of Materials see Table 5 1 are installed by default at the factory If using an alternative capacitor use components rated for 50 V minimum with 63 V or higher recommended for long term reliability 4 5 Protection Network Resistors R4 and R14 along with Schottky diodes D5 D6 D7 and D9 provide input protection for the PGA2500 preamplifier when using phantom power or ...

Page 10: ...t includes R17 R18 R19 R20 R21 C13 C14 and C15 These components support prototyping of additional circuitry such as pads and filters as well as emulation of various loading conditions During assembly at the factory resistors R18 and R19 are replaced by 0 Ω shunt resistors Resistors R17 R20 and R21 as well as capacitors C13 through C15 are not installed The differential preamplifier output is provi...

Page 11: ...nce 5 1 Schematic The complete electrical schematic for the PGA2500EVMV2 is shown in Figure 5 1 Refer to the Bill of Materials in Table 5 1 for descriptions of components shown in the schematic Figure 5 1 PGA2500EVMV2 Schematic www ti com Schematic PCB Layout and Bill of Materials SBOU257 JUNE 2021 Submit Document Feedback PGA2500EVMV2 Evaluation Module 11 Copyright 2021 Texas Instruments Incorpor...

Page 12: ...rd using both through hole and surface mount components Figure 5 2 PGA2500EVMV2 Top Overlay Schematic PCB Layout and Bill of Materials www ti com 12 PGA2500EVMV2 Evaluation Module SBOU257 JUNE 2021 Submit Document Feedback Copyright 2021 Texas Instruments Incorporated ...

Page 13: ...re 5 3 PGA2500EVMV2 Top Layer www ti com Schematic PCB Layout and Bill of Materials SBOU257 JUNE 2021 Submit Document Feedback PGA2500EVMV2 Evaluation Module 13 Copyright 2021 Texas Instruments Incorporated ...

Page 14: ... 5 4 PGA2500EVMV2 Bottom Layer Schematic PCB Layout and Bill of Materials www ti com 14 PGA2500EVMV2 Evaluation Module SBOU257 JUNE 2021 Submit Document Feedback Copyright 2021 Texas Instruments Incorporated ...

Page 15: ...en SMD LTST C191TGKT Lite On D5 D6 D7 D9 4 20V Diode Schottky 20 V 1 A SOD 323 CUS10S30 H3F Toshiba D10 D11 D12 D13 D14 5 Red LED Red SMD 150060RS75000 Wurth Elektronik D15 1 51V Diode TVS Uni 51 V 82 4 Vc 400 W 4 9 A SMA SMAJ51A Littelfuse H1 H2 H3 H4 4 Machine Screw Round 4 40 x 1 4 Nylon Philips panhead NY PMS 440 0025 PH B F Fastener Supply H5 H6 H7 H8 4 Standoff Hex 0 5 L 4 40 Nylon 1902C Key...

Page 16: ...C Q200 Grade 0 0402 ERJ 2GEJ103X Panasonic S1 1 DIP Switch SPST 4Pos Slide TH 78B04ST Grayhill TP1 TP2 TP3 TP4 TP5 TP6 TP7 TP8 TP9 TP10 TP11 TP12 TP13 TP14 TP15 TP16 TP17 TP18 TP19 TP20 TP21 21 Test Point Miniature SMT 5015 Keystone U1 1 Gain Range 0 dB and 10 dB to 65 dB in 1 dB Steps 40 to 85 degC 28 pin SOP DB28 Green RoHS no Sb Br PGA2500IDBR Texas Instruments U2 1 Single Power Supply BUFFER L...

Page 17: ...ch the GUI to automatically flash the microcontroller and adjust all programmable functions Successful flash can be visually confirmed by GPO LEDs flashing in sequence Manually set the COM port in the GUI composer to the COM port titled Microsoft after the successful flash by clicking File Options Serial Port Microsoft When successfully connected to the microcontroller via serial COM port the MSP4...

Page 18: ...other than TI b the nonconformity resulted from User s design specifications or instructions for such EVMs or improper system design or c User has not paid on time Testing and other quality control techniques are used to the extent TI deems necessary TI does not test all parameters of each EVM User s claims against TI under this Section 2 are void if User fails to notify TI of any apparent defects...

Page 19: ... These limits are designed to provide reasonable protection against harmful interference in a residential installation This equipment generates uses and can radiate radio frequency energy and if not installed and used in accordance with the instructions may cause harmful interference to radio communications However there is no guarantee that interference will not occur in a particular installation...

Page 20: ...y for convenience and should be verified by User 1 Use EVMs in a shielded room or any other test facility as defined in the notification 173 issued by Ministry of Internal Affairs and Communications on March 28 2006 based on Sub section 1 1 of Article 6 of the Ministry s Rule for Enforcement of Radio Law of Japan 2 Use EVMs only after User obtains the license of Test Radio Station as provided in R...

Page 21: ... any interfaces electronic and or mechanical between the EVM and any human body are designed with suitable isolation and means to safely limit accessible leakage currents to minimize the risk of electrical shock hazard User assumes all responsibility and liability for any improper or unsafe handling or use of the EVM by User or its employees affiliates contractors or designees 4 4 User assumes all...

Page 22: ...OR DAMAGES ARE CLAIMED THE EXISTENCE OF MORE THAN ONE CLAIM SHALL NOT ENLARGE OR EXTEND THIS LIMIT 9 Return Policy Except as otherwise provided TI does not offer any refunds returns or exchanges Furthermore no return of EVM s will be accepted if the package has been opened and no return of the EVM s will be accepted if they are damaged or otherwise not in a resalable condition If User feels it has...

Page 23: ...s 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 wi...

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