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AD74111:  2.5 V, 24-Bit Sigma-Delta Mono CODEC

Product Details

The AD74111 is a front-end processor for general purpose audio and voice applications. It features a multi-bit Sigma-Delta A/D conversion channel and a multi-bit Sigma-Delta D/A conversion channel. The ADC channel provides >67 dB THD+N and the DAC channel provides >88 dB THD+N both over an audio signal bandwidth.

The AD74111 is particularly suitable for a variety of applications where mono input and output channels are required, including audio sections of Digital Video Camcorders, portable personal audio devices and telematic applications. Its high quality performance also make it suitable for speech and telephony applications such as speech recognition and synthesis and modern feature phones.

An on-chip reference voltage is included but can be overdriven by an external reference source if required.

The AD74111 offers sampling rates which, depending on MCLK selection and MCLK divider ratio, range from 8 kHz in the voiceband range to 48 kHz in the audio range.

The AD74111 is available in 16 lead TSSOP package option and is specified for the automotive temperature range of -40°C to +105°C.


  • 2.5 V Mono Audio Codec with 3.3 V Tolerant Digital Interface
  • Supports 8 kHz to 48 kHz Sample Rates
  • Supports 16-/20-/24-Bit Word Lengths
  • Multibit Σ-Δ Modulators with "Perfect Differential Linearity Restoration" for Reduced Idle Tones and Noise Floor
  • Data Directed Scrambling DAC – Least Sensitive to Jitter
  • Programmable ADC Gain
  • On-Chip Volume Control for DAC Channel
  • Software Controllable Clickless Mute
  • Performance (20 Hz to 20 kHz)
    - 85 dB ADC Dynamic Range
    - 93 dB DAC Dynamic Range
  • Supports 256 x fS, 512 x fS, and
    768 x fS Master Mode Clocks
  • Master Clock Prescaler for Use with DSP Master Clocks
  • On-Chip Reference

Functional Block Diagram for AD74111


Title Content Type File Type
AD74111: Low Cost, Low Power Mono Audio Codec Data Sheet  (Rev 0, 02/2003) (pdf, 344 kB) Data Sheets PDF
AN-283: Sigma-Delta ADCs and DACs  (pdf, 1699 kB)
Overview of Sigma-Delta Concepts: Oversampling, Noise Shaping Using the Sigma-Delta Modulator, Digital Filtering and Decimation.
Application Notes PDF
AN-327: DAC ICs: How Many Bits Is Enough?  (pdf, 345 kB)
Digital audio playback DACs are available in a variety of different architectures--each with it's own performance tradeoffs.
Application Notes PDF
AN-211: The Alexander Current-Feedback Audio Power Amplifier  (pdf, 1154 kB) Application Notes PDF
Benchmarking Integrated Audio: Why CPU Usage Alone No Longer Predicts User Experience  (pdf, 1052 kB)
(, 2007)
Technical Articles PDF
Underneath Microsoft's Universal Audio Architecture  (pdf, 250 kB)
(DailyTech, 01/30/2007)
Product Reviews PDF
Audio Performance  (pdf, 811 kB)
(AnandTech, 10/20/2006)
Product Reviews PDF
ASUS P5N32-E SLI Plus: NVIDIA's 650i goes Dual x16  (pdf, 3028 kB)
(AnandTech, 04/02/2007)
Product Reviews PDF
Realtek Audio Codecs Not Rendering True EAX  (pdf, 138 kB)
(DailyTech, 09/26/2006)
Product Reviews PDF
RAQs index Rarely Asked Questions HTML
Glossary of EE Terms Glossary HTML

Evaluation Kits & Symbols & Footprints

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Price, packaging, availability

AD74111 Model Options
Model Package Pins Temp.
Price*(100-499) Price*1000 pcs RoHS View PCN/ PDN Check Inventory/
AD74111YRUZ Status: Production 16 ld TSSOP 16 Ind Tube, 96 $2.98 $2.69 Y  Material Info PCN Purchase Sample
AD74111YRUZ-REEL Status: Production 16 ld TSSOP 16 Ind Reel, 2500 - $2.69 Y  Material Info PCN Purchase
AD74111YRUZ-REEL7 Status: Production 16 ld TSSOP 16 Ind Reel, 1000 - $2.69 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.

AD74111 Evaluation Board
Model Description Price RoHS View PCN/ PDN Check Inventory/
EVAL-AD74111EBZ Status: Production Evaluation Board $168.67 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.

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