SBAS989 April   2019 PCM1840

PRODUCTION DATA.  

  1. 1 Features
  2. 2 Applications
  3. 3 Description
    1.     Simplified Block Diagram
  4. 4 Revision History
  5. 5 Pin Configuration and Functions
    1.     Pin Functions
  6. 6 Specifications
    1. 6.1 Absolute Maximum Ratings
    2. 6.2 ESD Ratings
    3. 6.3 Recommended Operating Conditions
    4. 6.4 Thermal Information
    5. 6.5 Electrical Characteristics
    6. 6.6 Timing Requirements: TDM, I2S or LJ Interface
    7. 6.7 Switching Characteristics: TDM, I2S or LJ Interface
    8. 6.8 Typical Characteristics
  7. 7 Detailed Description
    1. 7.1 Overview
    2. 7.2 Functional Block Diagram
    3. 7.3 Feature Description
      1. 7.3.1 Hardware Control
      2. 7.3.2 Audio Serial Interfaces
        1. 7.3.2.1 Time Division Multiplexed Audio (TDM) Interface
        2. 7.3.2.2 Inter IC Sound (I2S) Interface
        3. 7.3.2.3 Left-Justified (LJ) Interface
      3. 7.3.3 Phase-Locked Loop (PLL) and Clock Generation
      4. 7.3.4 Input Channel Configurations
      5. 7.3.5 Reference Voltage
      6. 7.3.6 Microphone Bias
      7. 7.3.7 Signal-Chain Processing
        1. 7.3.7.1 Digital High-Pass Filter
        2. 7.3.7.2 Configurable Digital Decimation Filters
          1. 7.3.7.2.1 Linear Phase Filters
            1. 7.3.7.2.1.1 Sampling Rate: 8 kHz or 7.35 kHz
            2. 7.3.7.2.1.2 Sampling Rate: 16 kHz or 14.7 kHz
            3. 7.3.7.2.1.3 Sampling Rate: 24 kHz or 22.05 kHz
            4. 7.3.7.2.1.4 Sampling Rate: 32 kHz or 29.4 kHz
            5. 7.3.7.2.1.5 Sampling Rate: 48 kHz or 44.1 kHz
            6. 7.3.7.2.1.6 Sampling Rate: 96 kHz or 88.2 kHz
            7. 7.3.7.2.1.7 Sampling Rate: 192 kHz or 176.4 kHz
          2. 7.3.7.2.2 Low-Latency Filters
            1. 7.3.7.2.2.1 Sampling Rate: 16 kHz or 14.7 kHz
            2. 7.3.7.2.2.2 Sampling Rate: 24 kHz or 22.05 kHz
            3. 7.3.7.2.2.3 Sampling Rate: 32 kHz or 29.4 kHz
            4. 7.3.7.2.2.4 Sampling Rate: 48 kHz or 44.1 kHz
            5. 7.3.7.2.2.5 Sampling Rate: 96 kHz or 88.2 kHz
      8. 7.3.8 Dynamic Range Enhancer (DRE)
    4. 7.4 Device Functional Modes
      1. 7.4.1 Hardware Shutdown
      2. 7.4.2 Active Mode
  8. 8 Application and Implementation
    1. 8.1 Application Information
    2. 8.2 Typical Application
      1. 8.2.1 Design Requirements
      2. 8.2.2 Detailed Design Procedure
      3. 8.2.3 Application Curves
  9. 9 Power Supply Recommendations
  10. 10Layout
    1. 10.1 Layout Guidelines
    2. 10.2 Layout Example
  11. 11Device and Documentation Support
    1. 11.1 Receiving Notification of Documentation Updates
    2. 11.2 Community Resources
    3. 11.3 Trademarks
    4. 11.4 Electrostatic Discharge Caution
    5. 11.5 Glossary
  12. 12Mechanical, Packaging, and Orderable Information

Package Options

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

3 Description

The PCM1840 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 2-VRMS 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 192 kHz. The device supports time-division multiplexing (TDM), I2S, or left-justified (LJ) audio formats, selectable with the hardware pin level. Additionally, the PCM1840 supports master and slave 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 3.3 V, make the device an excellent choice for cost-sensitive, space-constrained audio systems in far-field microphone recording applications.

The PCM1840 is specified from –40°C to +125°C, and is offered in a 24-pin WQFN package.

Device Information(1)

PART NUMBER PACKAGE BODY SIZE (NOM)
PCM1840 WQFN (24) 4.00 mm × 4.00 mm with 0.5-mm pitch
  1. For all available packages, see the package option addendum at the end of the data sheet.

Simplified Block Diagram

PCM1840 sbd-01-pcm1840-sbas989.gif