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AD1835A:  2 ADC, 8 DAC, 96 kHz, 24-Bit Sigma Delta Codec

Product Details

The AD1835A is a high-performance single-chip CODEC featuring four stereo DACs and one stereo ADC.

Each DAC comprises a high-performance digital interpolation filter, a multi-bit sigma-delta modulator featuring Analog Devices patented technology and a continuous-time voltage out analog section. Each DAC has independent volume control and clickless mute functions. The ADC comprises two 24-bit conversion channels with multi-bit sigma-delta modulators and decimation filters.

The AD1835A also contains an on-chip reference with a nominal value of 2.25 V.

The AD1835A contains a flexible serial interface that allows for glueless connection to a variety of DSP chips, AES/EBU receivers and sample rate converters. The AD1835A can be configured in Left-Justified, Right-Justified, I2S or DSP compatible serial modes. Control of the AD1835 is achieved by means of an SPI compatible serial port. While the AD1835A can be operated from a single 5 V supply, it also features a separate supply pin for its digital interface, which allows the device to be interfaced to other devices using 3.3 V power supplies.

The AD1835A is available in a 52 Lead MQFP package and is specified for the industrial temperature range of -40ºC to +85ºC.


  • 5 V Stereo Audio System with 3.3 V Tolerant Digital Interface
  • Supports up to 96 kHz Sample Rates
  • 192 kHz Sample Rate available on one DAC
  • Supports 16-/20-/24-Bit Word Lengths
  • Multibit Sigma-Delta Modulators with "Perfect Differential Linearity Restoration"
  • Data Directed Scrambling DACs -Least Sensitive to Jitter
  • Differential Output for Optimum Performance
  • ADCs:-95 dB THD +N, 105 dB SNR and Dynamic Range
  • DACs:-95 dB THD +N, 108 dB SNR and Dynamic Range
  • On-Chip Volume Controls Per Channel with 1024 Step Linear Scale
  • DAC and ADC Software Controllable Clickless Mutes
  • Digital De-Emphasis Processing
  • Supports 256 x fS, 512 x fS, and 768 x fS Master Mode Clocks
  • Power-Down Mode Plus Soft Power-Down Mode

Functional Block Diagram for AD1835A


Title Content Type File Type
AD1835A: 2 ADC, 8 DAC, 96 kHz, 24-Bit Sigma Delta Codecs Data Sheet  (Rev A, 12/2003) (pdf, 275 kB) Data Sheets PDF
Benchmarking Integrated Audio: Why CPU Usage Alone No Longer Predicts User Experience  (pdf, 1052 kB)
(, 2007)
Technical Articles 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)
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Underneath Microsoft's Universal Audio Architecture  (pdf, 250 kB)
(DailyTech, 01/30/2007)
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Audio Performance  (pdf, 811 kB)
(AnandTech, 10/20/2006)
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RAQs index Rarely Asked Questions HTML
Glossary of EE Terms Glossary HTML

Design Tools,Models,Drivers & Software

Title Content Type File Type
AD1836 Sound CODEC Linux Driver Device Drivers HTML

Evaluation Kits & Symbols & Footprints

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.

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Price, packaging, availability

AD1835A Model Options
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.

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