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Analog Devices Inc. AD1839AASZ
- Part No.:
- AD1839AASZ
- Manufacturer:
- Analog Devices Inc.
- Category:
- CODECS
- Package:
- 52-QFP
- Datasheet:
-
AD1839AASZ.pdf
- Description:
- IC CODEC 2ADC/6DAC 24 BIT 52MQFP
- Quantity:
- Payment:
- Shipping:
Inventory:1,561
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Product details
Overview
AD1839AASZ from Analog Devices is a high-performance 24-bit sigma-delta audio codec integrating two stereo ADCs and three stereo DACs (six total DAC channels) in a single 52-lead MQFP package. It supports up to 96 kHz sample rates on all converters, with one DAC channel capable of 192 kHz operation, and delivers 105 dB SNR (ADC) and 108 dB SNR (DAC) for professional-grade audio capture and playback in home theater receivers.
For engineers reviewing the AD1839AASZ datasheet, AD1839AASZ pinout, AD1839AASZ application, or AD1839AASZ equivalent, key selection considerations include its 24-bit resolution, 52-pin MQFP thermal and layout compatibility, TDM 8-in/8-out interface capability, and dual-supply operation (5 V analog + 3.3 V tolerant digital I/O).
Technical Context
The AD1839AASZ implements multibit Σ-∆ modulation with patented differential linearity restoration in both ADC and DAC paths, enabling −95 dB THD+N (ADC) and −92 dB THD+N (DAC) at 48/96 kHz. Its decimation and interpolation filters provide 120 dB stop-band attenuation (ADC) and 55–80 dB (DAC), with group delays of 460 µs (96 kHz ADC) and 110–340 µs (DAC) depending on sample rate.
It features a flexible serial interface supporting I²S, left/right-justified, DSP, and TDM modes - including 256×/512×/768× fS master clock options - and uses an SPI-compatible control port for register configuration. The device includes on-chip 2.25 V reference (FILTR), dedicated filter capacitor pins (FILTD/FILTR), and independent volume control per DAC channel with 1024-step linear scaling.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Resolution | 24-bit ADC and DAC - enables 115 dB theoretical dynamic range and precise low-level signal fidelity |
| Sample Rates | Up to 96 kHz on all ADC/DAC channels; 192 kHz on DAC1 only - supports high-res audio playback and studio-grade recording |
| SNR / Dynamic Range | ADC: 105 dB A-weighted; DAC: 108 dB A-weighted - meets professional audio requirements for noise floor performance |
| THD+N | ADC: −95 dB; DAC: −92 dB - ensures minimal harmonic distortion and noise in critical listening applications |
| Volume Control | 1024-step linear scale per DAC channel - provides precise 0.098 dB step resolution and 60 dB attenuation range |
| Interface Modes | I²S, left/right-justified, DSP, TDM (8-in/8-out) - enables glueless integration with SHARC® SPORT and multi-channel audio processors |
| Power Supplies | AVDD/DVDD = 5 V; ODVDD = 3.0–5.0 V - allows direct interfacing with 3.3 V logic while maintaining 5 V analog performance |
Pinout & Package
AD1839AASZ is housed in a 52-lead MQFP (Metric Quad Flat Package) with 0.65 mm lead pitch, optimized for industrial temperature operation (−40°C to +85°C) and thermal dissipation in audio subsystems.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| DVDD (Pins 1, 39) | Digital power supply | 5 V supply for digital core and control logic; requires local 100 nF bypass |
| AVDD (Pins 11, 19, 29) | Analog power supply | 5 V supply for ADC/DAC analog sections; must be filtered separately from DVDD |
| AGND (Pins 5, 10, 16, 24, 30, 34) | Analog ground reference | Star-ground connection point for analog signal paths and reference circuitry |
| DGND (Pins 40, 52) | Digital ground reference | Separate return path for digital I/O and clock domains to minimize noise coupling |
| MCLK (Pin 47) | Master clock input | Accepts 12.288 MHz (256×fS) or scaled clocks; jitter <300 ps rms required for optimal THD+N |
| DLRCLK / DBCLK (Pins 37, 38) | DAC frame and bit clock | Configurable as input or output; supports TDM, I²S, and packed data formats |
| ADCLP/ADCLN (Pins 21, 20) | Differential ADC left input | Full-scale ±2.828 V differential range; common-mode voltage fixed at 2.25 V |
| OUTL1/OUTR1 (Pins 7, 9) | DAC1 left/right single-ended outputs | 1.0 Vrms (2.8 Vp-p) full-scale swing referenced to 2.25 V DC bias |
| FILTD / FILTR (Pins 17, 18) | Filter capacitor connections | Require 10 µF + 100 nF parallel bypass to reduce DAC bias noise and stabilize internal reference |
Key Features
| Feature | Design Value |
|---|---|
| Data-directed scrambling DACs | Reduces sensitivity to clock jitter, preserving audio integrity even with moderate-quality master clocks |
| On-chip 2.25 V reference (FILTR) | Provides stable common-mode bias for ADC inputs and DAC outputs; usable to bias external op amps |
| Clickless mute and volume control | Software-controllable per-channel muting and attenuation without audible transients during state changes |
| Digital de-emphasis processing | Compensates for pre-emphasis applied during CD mastering; ±0.1 dB gain error ensures accurate spectral restoration |
| Soft power-down mode | Reduces analog supply current to 55–67 mA while retaining register state for fast wake-up |
Applications
| Home Theater Receivers | DVD/Blu-ray Audio Processors |
|---|---|
Use Scenario: Multi-channel audio decoding and post-processing in 5.1/7.1 surround sound systems with HDMI or S/PDIF inputs. IC Role / Device Role / Timing Role: Primary audio codec handling simultaneous ADC capture (microphone input) and DAC playback (front/rear/center channels) with synchronized TDM framing. Use Value: 108 dB DAC SNR and 105 dB ADC SNR ensure clean channel separation and low-noise amplification across all speaker outputs. | Use Scenario: High-fidelity audio extraction from optical/coaxial digital sources with analog output to legacy amplifiers. IC Role / Device Role / Timing Role: Dual-role converter: ADC digitizes analog auxiliary inputs (e.g., phono), while DACs reconstruct PCM and DTS audio streams at 96 kHz. Use Value: Support for 24-bit/96 kHz playback and digital de-emphasis enables bit-accurate CD replay and studio-mastered content rendering. |
| Automotive Infotainment Systems | Professional Audio Effects Units |
Use Scenario: In-vehicle audio processing with noise cancellation, equalization, and multi-zone output routing. IC Role / Device Role / Timing Role: Three stereo DAC pairs drive front, rear, and subwoofer amplifiers independently; ADC captures cabin microphone array for ANC. Use Value: Independent 1024-step volume control per DAC channel enables precise zone-level loudness matching across varying cabin acoustics. | Use Scenario: Real-time effects processing (reverb, delay, modulation) requiring low-latency analog I/O and high-resolution conversion. IC Role / Device Role / Timing Role: High-stability ADC/DAC interface for SHARC® DSP via SPORT with TDM 8-in/8-out mode and deterministic group delay. Use Value: 460 µs (96 kHz ADC) and 160 µs (96 kHz DAC) group delays enable tight feedback loop timing in digital effects algorithms. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar audio codec applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| AK4396VT-F | Single 24-bit DAC (not ADC+DAC); 125 dB SNR; 192 kHz native; QFN-32 package | No integrated ADC; lacks TDM and auxiliary interfaces; optimized for playback-only DAC stages | Select when system already includes separate ADC or requires ultra-low-noise DAC-only solution |
| CS4382-KQZ | 8-channel 24-bit DAC (no ADC); 114 dB SNR; 192 kHz; 48-pin TQFP; no on-chip reference | Playback-only; requires external reference and filtering; higher channel count but no capture capability | Choose for multi-DAC channel expansion where ADC functionality is handled elsewhere |
Compared with AK4396VT-F and CS4382-KQZ, AD1839AASZ uniquely integrates both high-SNR ADC and DAC functions with TDM flexibility and on-chip reference - making it suitable for compact, self-contained audio subsystems requiring bidirectional conversion without external support components.
Availability
AD1839AASZ is available at Aetrix Electronics and suitable for home theater receivers, automotive infotainment systems, and professional audio effects units requiring stable component supply, long-term industrial temperature support, and guaranteed 24-bit audio fidelity.
Supply support for AD1839AASZ includes scheduled delivery planning, volume procurement assistance, BOM continuity management, traceable sourcing, and lifecycle availability coordination for OEM customers, industrial embedded developers, connected-device designers, and electronics production programs.
Manufacturer
Analog Devices, Inc. is a global leader in high-performance analog, mixed-signal, and digital signal processing semiconductors, headquartered in Norwood, MA.
The AD1839AASZ belongs to Analog Devices' precision audio codec product line, designed specifically for high-fidelity consumer and professional audio systems demanding simultaneous multi-channel analog I/O, low THD+N, and flexible digital interface options.
FAQ
What is the maximum sample rate supported by AD1839AASZ on its ADC channels?
AD1839AASZ supports up to 96 kHz on both stereo ADC channels. This is achieved using a 12.288 MHz MCLK (256 × fS) with the decimator configured for IMCLK/256. The ADC does not support 192 kHz operation - that capability is exclusive to DAC1, as confirmed in the functional overview and Table 7 of the datasheet.
Does AD1839AASZ include an internal voltage reference, and how is it used?
Yes, AD1839AASZ includes an on-chip 2.25 V reference brought out on the FILTR pin. It serves as the common-mode voltage for all analog inputs and outputs and can bias external op amps. The pin requires a 10 µF + 100 nF bypass capacitor and supports ≤50 µA load current - critical for maintaining ADC/DAC accuracy and noise performance.
Can AD1839AASZ operate with a 3.3 V digital interface while using 5 V analog supplies?
Yes, AD1839AASZ supports mixed-supply operation: AVDD and DVDD are 5 V, while ODVDD (digital I/O driver supply) accepts 3.0–5.0 V. This allows direct interfacing with 3.3 V DSPs or microcontrollers without level shifters, as verified in the "5 V stereo audio system with 3.3 V tolerant digital interface" feature list and Power Supply section.
How many independent DAC channels does AD1839AASZ provide, and what output configuration do they use?
AD1839AASZ provides six independent DAC channels arranged as three stereo pairs (DAC1–DAC3), each with single-ended outputs (e.g., OUTL1/OUTR1). All six outputs are active simultaneously, with per-channel volume control and clickless mute - confirmed in the General Description, Pin Function Descriptions, and DACs functional overview.
What serial interface modes does AD1839AASZ support for connecting to a SHARC® processor?
AD1839AASZ supports TDM interface mode enabling 8-in/8-out operation using a single SHARC® SPORT, as explicitly stated in the FEATURES list and Functional Overview. It also supports I²S, left-justified, right-justified, and DSP serial modes - all configurable via control registers without hardware changes.
AD1839AASZ Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Analog Devices Inc.
- Series:
- -
- Package/Case:
- 52-QFP
- Packaging:
- Tray
- Product Status:
- Obsolete
- Type:
- Stereo Audio
- Data Interface:
- Serial
- Resolution (Bits):
- 24 b
- Number of ADCs / DACs:
- 2 / 6
- Sigma Delta:
- Yes
- S/N Ratio, ADCs / DACs (db) Typ:
- 105 / 108
- Dynamic Range, ADCs / DACs (db) Typ:
- 105 / 108
- Voltage - Supply, Analog:
- 4.5V ~ 5.5V
- Voltage - Supply, Digital:
- 4.5V ~ 5.5V
- Operating Temperature:
- -40°C ~ 85°C
- Grade:
- -
- Qualification:
- -
- Mounting Type:
- Surface Mount
- Supplier Device Package:
- 52-MQFP (10x10)
AD1839AASZ FAQ
1.How can I place an order for AD1839AASZ through Aetrix?
Please submit a Request for Quotation (RFQ) for AD1839AASZ on Aetrix. Our sales agent will provide a competitive quotation and guide you through the order confirmation once you accept the terms.
2.Are the price and stock information for AD1839AASZ reliable?
The price and inventory of AD1839AASZ are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for AD1839AASZ is usually 5 days.
3.What payment methods are accepted for AD1839AASZ?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for AD1839AASZ transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for AD1839AASZ?
AD1839AASZ orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your AD1839AASZ order is processed, you will receive an email with the shipment details and tracking number.
Note: Tracking information may take up to 24 hours to appear. Express delivery typically takes 3–5 business days.
5.How can I obtain technical support or documentation for AD1839AASZ?
For technical support, including AD1839AASZ datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your AD1839AASZ requirements.
6.How does Aetrix verify that AD1839AASZ is sourced from the original manufacturer or authorized distributors?
All AD1839AASZ products on Aetrix are procured from qualified distributors and authorized channels. Our dedicated quality assurance team conducts strict verification, including traceability checks and, if necessary, third-party testing. This ensures that AD1839AASZ meets industry standards.
7.What is the process for return or replacement of AD1839AASZ?
All AD1839AASZ units undergo pre-shipment inspection (PSI). If there is an issue with AD1839AASZ, returns or replacements are accepted under the following conditions:
1.Quantity discrepancies, incorrect items, or visible external defects (such as breakage or corrosion), acknowledged by Aetrix.
2.The issue is reported within 90 days of delivery.
3.The AD1839AASZ part is unused and in its original packaging.
Return procedure for AD1839AASZ:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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