Add to Signal Chain Designer

ADAU1977:  Quad ADC with Diagnostics (10V Input)

Product Details

Product Status:Recommended for New Designs

The ADAU1977 incorporates four high performance analog-todigital converters (ADCs) with direct-coupled inputs capable of 10 V rms. The ADC uses multibit sigma-delta (Σ-Δ) architecture with continuous time front end for low EMI. The ADCs can be connected to the electret microphone (ECM) directly and provide the bias for powering the microphone. Built-in diagnostic circuitry detects faults on input lines and includes comprehensive diagnostics for faults on microphone inputs. The faults reported are short to battery, short to microphone bias, short to ground, short between positive and negative input pins, and open input terminals. In addition, each diagnostic fault is available as an IRQ flag for ease in system design. An I2C/SPI control port is also included. The ADAU1977 uses only a single 3.3 V supply. The part internally generates the microphone bias voltage. The microphone bias is programmable in a few steps from 5 V to 9 V. The low power architecture reduces the power consumption. An on-chip PLL can derive the master clock from an external clock input or frame clock (sample rate clock). When fed with a frame clock, the PLL eliminates the need for a separate high frequency master clock in the system. The ADAU1977 is available in a 40-lead LFCSP package.

APPLICATIONS
  • Automotive audio systems
  • Active Noise Cancellation System

FEATURES and BENEFITS

  • Programmable microphone bias (5 V to 9 V) with diagnostics
  • Four 10 V rms capable direct-coupled differential inputs
  • On-chip PLL for master clock
  • Low EMI design
  • 106 dB ADC dynamic range
  • −95 dB THD + N
  • Selectable digital high-pass filter
  • 24-bit ADC with 8 kHz to 192 kHz sample rates
  • See data sheet for additional features

Functional Block Diagram for ADAU1977

Similar Products

Documentation

Title Content Type File Type
ADAU1977: Quad ADC with Diagnostics Data Sheet (Rev C, 01/2014) (pdf, 3342 kB) Data Sheets PDF
UG-600: Evaluating the ADAU1977/ADAU1978/ADAU1979  (pdf, 2155 kB) User Guides PDF
Glossary of EE Terms Glossary HTML

Design Tools,Models,Drivers & Software

Title Content Type File Type
ADAU1977 IBIS Model  (ibs) IBIS Models IBS
ADAU1977 Sound CODEC Linux Driver (Wiki Site) Device Drivers HTML

Evaluation Kits & Symbols & Footprints

Evaluation Boards & KitsView the Evaluation Boards and Kits page for documentation and purchasing

Symbols and Footprints— Analog Devices offers Symbols & Footprints which are compatible with a large set of today’s CAD systems for broader and easier support.

SampleSample & Buy

Price, packaging, availability

ADAU1977 Model Options
Model Package Pins Temp.
Range
Packing,
Qty
Price*(100-499) Price*1000 pcs RoHS View PCN/ PDN Check Inventory/
Purchase/Sample
ADAU1977WBCPZ Status: Production 40 ld LFCSP (6x6mm w/3.9mm pad) 40 Auto Tray, 490 $6.31 $5.06 Y  Material Info PCN Purchase Sample
ADAU1977WBCPZ-R7 Status: Production 40 ld LFCSP (6x6mm w/3.9mm pad) 40 Auto Reel, 750 $6.31 $5.06 Y  Material Info PCN Purchase
ADAU1977WBCPZ-RL Status: Production 40 ld LFCSP (6x6mm w/3.9mm pad) 40 Auto Reel, 2500 - $5.06 Y  Material Info PCN Purchase
Price Table Help

The USA list pricing shown is for BUDGETARY USE ONLY, shown in United States dollars (FOB USA per unit for the stated volume), and is subject to change. International prices may differ due to local duties, taxes, fees and exchange rates. For volume-specific price or delivery quotes, please contact your local Analog Devices, Inc. sales office or authorized distributor. Pricing displayed for Evaluation Boards and Kits is based on 1-piece pricing.

ADUSB2EBZ Evaluation Board
Model Description Price RoHS View PCN/ PDN Check Inventory/
Purchase/Sample
EVAL-ADUSB2EBZ Status: Production USB Interface $80.00 Yes -
ADAU1977/ADAU1978/ADAU1979 Evaluation Board
Model Description Price RoHS View PCN/ PDN Check Inventory/
Purchase/Sample
EVAL-ADAU1977Z Status: Production Evaluation Board $499.00 Yes -

Pricing displayed is based on 1-piece. The USA list pricing shown is for budgetary use only, shown in United States dollars (FOB USA per unit), and is subject to change. International prices may vary due to local duties, taxes, fees and exchange rates.

Check Inventory & Purchase

View Sales and Distribution Offices

沪ICP备09046653号
content here.
content here.

Review this Product

Close