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OPA375, OPA2375

SBOS886B – NOVEMBER 2017 – REVISED JANUARY 2020

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Product Folder Links: OPA375 OPA2375

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Copyright © 2017–2020, Texas Instruments Incorporated

Table of Contents

1

Features .................................................................. 1

2

Applications ........................................................... 1

3

Description ............................................................. 1

4

Revision History..................................................... 2

5

Device Comparison Table..................................... 3

6

Pin Configuration and Functions ......................... 4

7

Specifications......................................................... 6

7.1

Absolute Maximum Ratings ...................................... 6

7.2

ESD Ratings ............................................................ 6

7.3

Recommended Operating Conditions ....................... 6

7.4

Thermal Information for Single Channel ................... 6

7.5

Thermal Information for Dual Channel...................... 7

7.6

Electrical Characteristics........................................... 8

7.7

Typical Characteristics: OPA375 ............................ 11

7.8

Typical Characteristics: OPA2375 .......................... 19

8

Detailed Description ............................................ 26

8.1

Overview ................................................................. 26

8.2

Functional Block Diagram ....................................... 26

8.3

Feature Description................................................. 26

8.4

Device Functional Modes........................................ 31

9

Application and Implementation ........................ 32

9.1

Application Information............................................ 32

9.2

Single-Supply Electret Microphone Preamplifier With

Speech Filter ............................................................ 32

10

Power Supply Recommendations ..................... 35

11

Layout................................................................... 35

11.1

Layout Guidelines ................................................. 35

11.2

Layout Example .................................................... 36

12

Device and Documentation Support ................. 38

12.1

Device Support...................................................... 38

12.2

Related Links ........................................................ 38

12.3

Receiving Notification of Documentation Updates 38

12.4

Support Resources ............................................... 38

12.5

Trademarks ........................................................... 38

12.6

Electrostatic Discharge Caution ............................ 38

12.7

Glossary ................................................................ 38

13

Mechanical, Packaging, and Orderable

Information ........................................................... 38

4 Revision History

Changes from Revision A (January 2019) to Revision B

Page

•

Changed Low Broadband Noise specification in Features section to match OPA2375 specification ................................... 1

•

Added THD+N specification to Features section.................................................................................................................... 1

•

•

Added supply range definition for OPA2375 and OPA4375 in Features section ................................................................... 1

•

Changed Noise Spectral Density vs Frequency plot on front page to the OPA2375 noise plot ............................................ 1

•

Changed wording in Description section to reflect the whole OPAx375 family...................................................................... 1

•

Added OPA2375 devices to Device Information table ........................................................................................................... 1

•

Added Device Comparison Table section .............................................................................................................................. 3

•

Added pin out drawings for OPA2375 packages in Pin Configuration and Functions section............................................... 4

•

Added pin functions for OPA2375 packages.......................................................................................................................... 4

•

Added X2QFN Package Drawing and Pin Functions for OPA2375S in Pin Configuration and Functions section................ 5

•

Changed and combined the OPA375 and OPA2375 Absolute Maximum Ratings, ESD Ratings, Recommended

Operating Conditions, Thermal Information, and Electrical Characteristics in the Specifications section ............................. 6

•

Changed Human-body model (HBM) value from: ±1000 to ±3000 and Charged-device mode (CDM) value

from ±250 to ±1000 ................................................................................................................................................................ 6

•

Added OPA2375 typical characteristic graphs in the Specifications section ....................................................................... 18

•

Added EMI Rejection section with description information to Detailed Description section................................................. 27

•

Added Electrical Overstress section and diagram to Detailed Description section.............................................................. 28

•

Added Typical Specification and Distributions section to Detailed Description section ....................................................... 29

•

Added Shutdown Function section with description for OPAx375S to Detailed Description section ................................... 30

•

Added Packages With an Exposed Thermal Pad section to Detailed Description section .................................................. 30

•

Added dual channel layout example in the Layout section .................................................................................................. 37