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6.2 PCB Layout

The PGA2505EVMV2 is a four-layer printed circuit board using both through-hole and surface-mount
components.

Figure 6-2. PGA2505EVMV2 Top Overlay

Schematic, PCB Layout, and Bill of Materials

14

PGA2505EVMV2 Evaluation Module

SBOU259 – OCTOBER 2021

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Copyright © 2021 Texas Instruments Incorporated

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Содержание PGA2505EVMV2

Страница 1: ...als BOM Throughout this document the terms evaluation board evaluation module and EVM are synonymous with the universal PGA2505EVMV2 Table of Contents 1 Product Overview 3 2 Features 6 3 Getting Started 7 3 1 Electrostatic Discharge Caution 7 3 2 Unpacking the EVM 7 3 3 Absolute Maximum Operating Conditions 8 4 Setup Guide 9 4 1 Analog and Digital Power Supplies 9 www ti com Table of Contents SBOU...

Страница 2: ... Figure 3 1 PGA2505EVMV2 With MSP430 Microcontroller Connected 7 Figure 4 1 Power Terminal Block J2 Schematic 9 Figure 4 2 Microphone Input Connector Configuration 10 Figure 5 1 PGA2505EVMV2 GUI With Programmable Functions 12 Figure 6 1 PGA2505EVMV2 Schematic 13 Figure 6 2 PGA2505EVMV2 Top Overlay 14 Figure 6 3 PGA2505EVMV2 Top Layer 15 Figure 6 4 PGA2505EVMV2 Bottom Layer 15 List of Tables Table ...

Страница 3: ...inputs pins 24 and 23 respectively The programmable gain amplifier can be programmed to either pass through the signal at unity gain or apply 9 dB to 60 dB of gain to the input signal The gain of the amplifier is adjustable over the full 9 dB to 60 dB range in 3 dB steps The differential output of the PGA2505 is made available at VOUT and VOUT pins 15 and 14 respectively Gain is controlled using a...

Страница 4: ... Preamplifier Gain where N G 5 0 DEC For N 0 Gain 0dB For N 1 to 17 Gain dB 6 3N For N 18 to 31 Gain 60dB CS SCLK SDI SDO Figure 1 3 PGA2505 16 Bit Control The differential analog output of the PGA2505 is constantly monitored by a dc servo amplifier loop The purpose of the servo loop is to minimize the dc offset voltage present at the analog outputs by feeding back an error signal to the input sta...

Страница 5: ... V The VCOMIN pin allows for a dc coupled interface between the PGA2505 preamplifier output and the inputs of common single supply audio analog to digital converters ADCs The PGA2505 may be forced to unity Check the Unity Gain checkbox in the GUI to activate this function The zero crossing control input is provided for enabling and disabling the internal zero crossing detector function Forcing the...

Страница 6: ...with flexible output loading options LED indicators for GPOs and the over range output Common mode voltage input VCOMIN pin Includes applications software that is compatible with personal computers that include a built in USB port Requires 5 V and 5 V analog supplies as well as a 5 V digital supply Leave the 5 V digital supply VCC unconnected if using the MSP EXP430F5529LP Features www ti com 6 PG...

Страница 7: ...g 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 PGA2505EVMV2 evaluation module board order and unpack the MSP EXP430F5529LP MSP430F5529 USB LaunchPad development kit Plug in the MSP430 microcontroller on top of the PGA2505EVMV2 as shown in Figure 3 1 Figure 3 1 PGA2505EVMV2 With MSP430 Microcontro...

Страница 8: ... Description Rating Power supply voltages VA 5 5 VDC maximum VA 5 5 VDC maximum VCOM 0 3 VDC minimum to VA 0 3 VDC maximum VCC 5 5 VDC maximum Phantom power 50 VDC 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 Getting Started www ti com 8 PGA2505EVMV2 Evalu...

Страница 9: ...power the PGA2505 microphone preamplifier integrated circuit The digital power supply VCC is unconnected if using the MSP EXP430F5529LP An optional third analog power supply may be used for the PGA2505 common mode dc voltage input VCOMIN pin 22 VCOMIN allows the PGA2505 output and input to be dc biased to a common mode voltage between 0 V and 2 5 V and is connected through terminal block J2 The co...

Страница 10: ...g capacitors They provide ac coupling to the microphone input as well as block the phantom voltage from reaching the PGA2505 input terminals when using a condenser microphone The blocking capacitors are selected to not degrade the dynamic performance of the PGA2505 The capacitors shown in the bill of materials see Table 6 1 are installed by default at the factory If using an alternative capacitor ...

Страница 11: ...pads and filters During assembly at the factory resistors R8 and R13 are not installed while R5 R6 R15 R16 Cc1 and Cc2 are replaced by 0 Ω shunt resistors 4 7 Configurable Output Circuitry and Preamp Output Connector The configurable portion of the output circuit includes R17 R18 R19 R20 R21 C13 C14 and C15 These components support prototyping of additional circuitry such as pads and filters as we...

Страница 12: ...ically flash the microcontroller and adjust all programmable functions Successful flash can be visually confirmed by the GPO LEDs flashing in sequence 4 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 When successfully connected to the microcontroller through the serial COM port the MSP430 acknowledges s...

Страница 13: ...ence 6 1 Schematic The complete electrical schematic for the PGA2505EVMV2 is shown in Figure 6 1 See the bill of materials in Table 6 1 for descriptions of components shown in the schematic Figure 6 1 PGA2505EVMV2 Schematic www ti com Schematic PCB Layout and Bill of Materials SBOU259 OCTOBER 2021 Submit Document Feedback PGA2505EVMV2 Evaluation Module 13 Copyright 2021 Texas Instruments Incorpora...

Страница 14: ...d using both through hole and surface mount components Figure 6 2 PGA2505EVMV2 Top Overlay Schematic PCB Layout and Bill of Materials www ti com 14 PGA2505EVMV2 Evaluation Module SBOU259 OCTOBER 2021 Submit Document Feedback Copyright 2021 Texas Instruments Incorporated ...

Страница 15: ...Top Layer Figure 6 4 PGA2505EVMV2 Bottom Layer www ti com Schematic PCB Layout and Bill of Materials SBOU259 OCTOBER 2021 Submit Document Feedback PGA2505EVMV2 Evaluation Module 15 Copyright 2021 Texas Instruments Incorporated ...

Страница 16: ...emet Cc1 Cc2 R5 R6 R15 R16 R18 R19 8 0 RES 0 0 W AEC Q200 Grade 0 0805 0805 PMR10EZPJ000 Rohm D1 D3 D8 3 Zener Diode 5 6V 250mW 4 Surface Mount TO 236AB SOT23 3 PLVA656A 215 Nexperia D2 D4 2 Green LED Green SMD LED_0603 LTST C191TGKT Lite On D5 D6 D7 D9 4 20V Diode Schottky 20 V 1 A SOD 323 SOD 323 CUS10S30 H3F Toshiba D10 D11 D12 D13 D14 5 Red LED Red SMD LED_0603 150060RS75000 Wurth Elektronik D...

Страница 17: ...merica R10 1 1 00Meg RES 1 00 M 1 0 125 W AEC Q200 Grade 0 0805 0805 CRCW08051M00FKEA Vishay Dale R22 R23 R38 R39 4 49 9 RES 49 9 0 1 0 125 W 0805 0805 RT0805BRD0749R9L Yageo America 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 Testpoint_Keystone_Miniature 5015 Keystone U1 1 Gain Range 0 dB and 9 dB to 60 dB in 3 dB Ste...

Страница 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...

Страница 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...

Страница 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...

Страница 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...

Страница 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...

Страница 23: ...o 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 indemn...

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