Texas Instruments PCM1840EVM Скачать руководство пользователя страница 6 | Manualshive

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Texas Instruments PCM1840EVM Скачать руководство пользователя страница 6

EVM Overview

6

SBAU345 – March 2020

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Copyright © 2020, Texas Instruments Incorporated

PCM1840 Evaluation Module

3.1.2

Onboard Microphone Input

For the onboard microphone input configuration (shown in

), the PCM1840EVM records the audio

captured from the microphone located on the bottom-left edge of the board. MICBIAS is used to power the
onboard microphone through J14. J15, and J16 must be installed to connect the microphone output to the
ADC inputs. There must not be any connections to J1 during onboard microphone use to preserve the
performance of the microphone.

Figure 3. PCM1840EVM Connection for the Onboard Microphone Test

4

EVM Overview

shows an overview of the system.

Figure 4. EVM Front Overview

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Содержание PCM1840EVM

Страница 1: ...s recommended practices for these devices Contents 1 Introduction 3 2 Power Supply 3 3 Hardware Configuration 3 3 1 PCM1840EVM Inputs 5 4 EVM Overview 6 5 Layer Plots 8 6 Schematic and Bill of Materials 11 6 1 PCM1840EVM Schematic 11 6 2 PCM1840EVM Bill of Materials 13 7 Related Documentation 15 List of Figures 1 PCM1840EVM Input Architecture 5 2 PCM1840EVM Connection for Line Input Application 5 ...

Страница 2: ...nts Incorporated PCM1840 Evaluation Module List of Tables 1 PCM1840 EVM Headers and Jumpers 3 2 PCM1840 Hardware Controllable Settings 4 3 PCM1840EVM Bill of Materials 13 Trademarks Burr Brown is a trademark of Texas Instruments All other trademarks are the property of their respective owners ...

Страница 3: ...that will hold the ADC in shutdown until both AVDD and IOVDD have reached their respective threshold voltages The shutdown thresholds for the supply voltages can be adjusted as shown in Equation 1 and Equation 2 The supervisor can also be removed from the shutdown logic by depopulating R5 For more information on the reset supervisor see the TPS37xx Dual Channel Low Power High Accuracy Voltage Dete...

Страница 4: ... Functional Mode 0 0 Linear phase filter 0 1 MCLK 256 Fs 1 0 Low latency filter 1 1 MCLK 512 Fs MD1 Modes MD1 MSZ 0 Slave 1 Master MD1 Functional Mode 0 0 DRE disabled 0 1 MCLK input 1 0 DRE enabled 1 1 MCLK input Audio Output Data Format FMT0 FMT1 Data Format 0 0 4 channel TDM 0 1 2 channel TDM 1 0 2 channel left justified 1 1 2 channel I2S All hardware pins are tied low by default placing the de...

Страница 5: ... frequency at approximately 63 Hz This can be adjusted by replacing the input AC coupling capacitors on the EVM if necessary Figure 1 shows the architecture of the inputs to the evaluation module The EVM supports a differential full scale input range of 2 VRMS with an AVDD of 3 3 V Figure 1 PCM1840EVM Input Architecture 3 1 1 Line Inputs For the line input configuration shown in Figure 2 the PCM18...

Страница 6: ...captured from the microphone located on the bottom left edge of the board MICBIAS is used to power the onboard microphone through J14 J15 and J16 must be installed to connect the microphone output to the ADC inputs There must not be any connections to J1 during onboard microphone use to preserve the performance of the microphone Figure 3 PCM1840EVM Connection for the Onboard Microphone Test 4 EVM ...

Страница 7: ...www ti com EVM Overview 7 SBAU345 March 2020 Submit Documentation Feedback Copyright 2020 Texas Instruments Incorporated PCM1840 Evaluation Module Figure 5 EVM Back Overview ...

Страница 8: ...Layer Plots www ti com 8 SBAU345 March 2020 Submit Documentation Feedback Copyright 2020 Texas Instruments Incorporated PCM1840 Evaluation Module 5 Layer Plots Figure 6 Top Layer ...

Страница 9: ...www ti com Layer Plots 9 SBAU345 March 2020 Submit Documentation Feedback Copyright 2020 Texas Instruments Incorporated PCM1840 Evaluation Module Figure 7 Power Plane 1 ...

Страница 10: ...Layer Plots www ti com 10 SBAU345 March 2020 Submit Documentation Feedback Copyright 2020 Texas Instruments Incorporated PCM1840 Evaluation Module Figure 8 Power Plane 2 ...

Страница 11: ...March 2020 Submit Documentation Feedback Copyright 2020 Texas Instruments Incorporated PCM1840 Evaluation Module Figure 9 Bottom Layer 6 Schematic and Bill of Materials 6 1 PCM1840EVM Schematic Figure 10 and Figure 11 show the schematics for the PCM1840EVM ...

Страница 12: ... of Materials www ti com 12 SBAU345 March 2020 Submit Documentation Feedback Copyright 2020 Texas Instruments Incorporated PCM1840 Evaluation Module Figure 10 PCM1840EVM Schematics Main Figure 11 PCM1840 Schematics Power ...

Страница 13: ...T AT Ceramics D1 D3 2 Green LED Green SMD LED_0805 LTST C170KGKT Lite On D2 1 Red LED Red SMD 1206 LTST C150CKT Lite On H1 H2 H3 H4 4 Small nylon hex nut 0 10 thick with a 0 250 outside diameter and a 4 40 threading Hex Nut 4 40 Thread 250 Head Dia 9605 Keystone H5 H6 H7 H8 4 Standoff Hex Male Female 4 40 Nylon 1 2 Standoff Hex Male Female 4 40 Nylon 1 2 4802 Keystone J1 J2 J3 J4 4 Terminal Block ...

Страница 14: ... 2 2 9 mm TL1015AF160QG E Switch TP9 TP10 2 Test Point Multipurpose Black TH Black Multipurpose Testpoint 5011 Keystone U1 1 PCM1840IRTWR RTW0024H WQFN 24 RTW0024H PCM1840IRTWR Texas Instruments U2 1 500 mA Low Quiescent Current Low Noise High PSRR Low Dropout Linear Regulator for Automotive DRB0008B VSON 8 DRB0008B TPS73533QDRBRQ1 Texas Instruments U3 1 Low Power Dual Voltage Detector in Small uS...

Страница 15: ...edback Copyright 2020 Texas Instruments Incorporated PCM1840 Evaluation Module 7 Related Documentation Texas Instruments PCM1840 Quad Channel 32 Bit 192 kHz Burr Brown Audio ADC Data Sheet Texas Instruments TPS37xx Dual Channel Low Power High Accuracy Voltage Detectors Data Sheet ...

Страница 16: ...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 17: ... 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 18: ...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 19: ... 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 20: ...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 21: ...se resources 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...

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