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Texas Instruments PGA2500EVMV2, Руководство пользователя

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5.2 PCB Layout

The PGA2500EVMV2 is a four-layer printed circuit board 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

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Copyright © 2021 Texas Instruments Incorporated

Содержание PGA2500EVMV2

Страница 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...

Страница 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...

Страница 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...

Страница 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 ...

Страница 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...

Страница 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...

Страница 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...

Страница 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...

Страница 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 ...

Страница 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...

Страница 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...

Страница 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 ...

Страница 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 ...

Страница 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 ...

Страница 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...

Страница 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...

Страница 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...

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: ...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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