SBASAU2 May   2024 PCM1841-Q1

ADVANCE INFORMATION  

  1.   1
  2. 1Features
  3. 2Applications
  4. 3Description
  5. 4Pin Configuration and Functions
  6. 5Specifications
    1. 5.1 Absolute Maximum Ratings
    2. 5.2 ESD Ratings
    3. 5.3 Recommended Operating Conditions
    4. 5.4 Thermal Information
    5. 5.5 Electrical Characteristics
    6. 5.6 Timing Requirements: TDM, I2S or LJ Interface
    7. 5.7 Switching Characteristics: TDM, I2S or LJ Interface
    8. 5.8 Timing Diagram
    9. 5.9 Typical Characteristics
  7. 6Detailed Description
    1. 6.1 Overview
    2. 6.2 Functional Block Diagram
    3. 6.3 Feature Description
      1. 6.3.1 Hardware Control
      2. 6.3.2 Audio Serial Interfaces
        1. 6.3.2.1 Time Division Multiplexed Audio (TDM) Interface
        2. 6.3.2.2 Inter IC Sound (I2S) Interface
        3. 6.3.2.3 Left-Justified (LJ) Interface
      3. 6.3.3 Phase-Locked Loop (PLL) and Clock Generation
      4. 6.3.4 Input Channel Configurations
      5. 6.3.5 Reference Voltage
      6. 6.3.6 Microphone Bias
      7. 6.3.7 Signal-Chain Processing
        1. 6.3.7.1 Digital High-Pass Filter
        2. 6.3.7.2 Configurable Digital Decimation Filters
          1. 6.3.7.2.1 Linear Phase Filters
            1. 6.3.7.2.1.1 Sampling Rate: 8kHz or 7.35kHz
            2. 6.3.7.2.1.2 Sampling Rate: 16kHz or 14.7kHz
            3. 6.3.7.2.1.3 Sampling Rate: 24kHz or 22.05kHz
            4. 6.3.7.2.1.4 Sampling Rate: 32kHz or 29.4kHz
            5. 6.3.7.2.1.5 Sampling Rate: 48kHz or 44.1kHz
            6. 6.3.7.2.1.6 Sampling Rate: 96kHz or 88.2kHz
            7. 6.3.7.2.1.7 Sampling Rate: 192kHz or 176.4kHz
          2. 6.3.7.2.2 Low-Latency Filters
            1. 6.3.7.2.2.1 Sampling Rate: 16kHz or 14.7kHz
            2. 6.3.7.2.2.2 Sampling Rate: 24kHz or 22.05kHz
            3. 6.3.7.2.2.3 Sampling Rate: 32kHz or 29.4kHz
            4. 6.3.7.2.2.4 Sampling Rate: 48kHz or 44.1kHz
            5. 6.3.7.2.2.5 Sampling Rate: 96kHz or 88.2kHz
      8. 6.3.8 Dynamic Range Enhancer (DRE)
    4. 6.4 Device Functional Modes
      1. 6.4.1 Hardware Shutdown
      2. 6.4.2 Active Mode
  8. 7Application and Implementation
    1. 7.1 Application Information
    2. 7.2 Typical Application
      1. 7.2.1 Design Requirements
      2. 7.2.2 Detailed Design Procedure
      3. 7.2.3 Application Curves
    3. 7.3 Power Supply Recommendations
    4. 7.4 Layout
      1. 7.4.1 Layout Guidelines
      2. 7.4.2 Layout Example
  9. 8Device and Documentation Support
    1. 8.1 Receiving Notification of Documentation Updates
    2. 8.2 Support Resources
    3. 8.3 Trademarks
    4. 8.4 Electrostatic Discharge Caution
    5. 8.5 Glossary
  10. 9Revision History
  11.   Mechanical, Packaging, and Orderable Information

Package Options

Mechanical Data (Package|Pins)
Thermal pad, mechanical data (Package|Pins)
Orderable Information

3 Description

The PCM1841-Q1 is a high-performance, Burr-Brown™ audio analog-to-digital converter (ADC) that supports simultaneous sampling of up to four analog channels. The device supports differential line and microphone inputs with a 2VRMS full-scale signal. The device integrates microphone bias voltage, a phase-locked loop (PLL), a DC removal high-pass filter (HPF), and supports sample rates up to 192kHz. The device supports time-division multiplexing (TDM), I2S, or left-justified (LJ) audio formats, selectable with the hardware pin level. Additionally, the PCM1841-Q1 supports controller and target mode selection for the audio bus interface operation. These integrated high-performance features, along with the ability to be powered from a single supply of 3.3V, make the device an excellent choice for cost-sensitive, space-constrained audio systems in far-field microphone recording applications.

The PCM1841-Q1 is specified from –40°C to +125°C and is offered in a 24-pin VQFN package.

Package Information
PART NUMBER PACKAGE (1) PACKAGE SIZE (2) BODY SIZE (NOM)
PCM1841-Q1 RGE (VQFN, 24) 4.00mm x 4.00mm 4.00mm × 4.00mm(3)
(1) For more information, see the Mechanical, Packaging, and Orderable Information.
(2) The package size (length × width) is a nominal value and includes pins, where applicable.
(3) Includes 0.5mm pitch.




PCM1841-Q1 Simplified Block Diagram Simplified Block Diagram