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Analog Devices Inc. AD1839AASZ-REEL
- Part No.:
- AD1839AASZ-REEL
- Manufacturer:
- Analog Devices Inc.
- Category:
- CODECS
- Package:
- 52-QFP
- Datasheet:
-
AD1839AASZ-REEL.pdf
- Description:
- IC CODEC 2ADC/6DAC 24 BIT 52MQFP
- Quantity:
- Payment:
- Shipping:
Inventory:800
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Product details
Overview
AD1839AASZ-REEL 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 for ADCs and 192 kHz on DAC1, delivers 105 dB SNR (ADC) and 108 dB SNR (DAC), and features independent 1024-step volume control per channel - used in DVD audio playback and home theater receiver signal chains.
For engineers reviewing the AD1839AASZ-REEL datasheet, AD1839AASZ-REEL pinout, AD1839AASZ-REEL application, or AD1839AASZ-REEL equivalent, key selection criteria include its triple-stereo DAC architecture with TDM support, 3.3 V–tolerant digital I/O, on-chip 2.25 V reference, and flexible serial interface modes (I²S, left/right-justified, DSP, TDM256/512).
Technical Context
The AD1839AASZ-REEL implements multibit Σ-∆ modulation for both ADC and DAC paths, with patented differential linearity restoration to suppress idle tones. Its ADC section uses 128× oversampling at 48 kHz (64× at 96 kHz), delivering 120 dB stop-band attenuation and linear-phase decimation filters with group delay of 910 µs (48 kHz) or 460 µs (96 kHz).
DAC interpolation employs 8× (48 kHz), 4× (96 kHz), or 2× (192 kHz) rates, with pass-band ripple ±0.01 dB and stop-band attenuation ≥55 dB. The device supports simultaneous operation of all six DAC channels via packed TDM mode using a single SHARC SPORT, and includes data-directed scrambling to minimize jitter sensitivity.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| ADC Channels | 2-channel stereo, fully differential inputs with common-mode voltage fixed at 2.25 V |
| DAC Channels | 6-channel (3 stereo pairs), single-ended outputs with 1.0 Vrms full-scale swing |
| Max Sample Rate | 96 kHz for ADC; 192 kHz for DAC1 only (stereo replicate enables distribution to other DACs) |
| SNR / Dynamic Range | ADC: 105 dB A-weighted; DAC: 108 dB A-weighted - enables high-fidelity consumer audio reproduction |
| THD + N | ADC: −95 dB; DAC: −92 dB - meets DVD-Audio and SACD playback fidelity requirements |
| Digital Interface | I²S, left/right-justified, DSP, and TDM256/512 modes; 3.3 V–tolerant ODVDD pin enables mixed-voltage system interfacing |
| Volume Control | 1024-step linear scale per channel (0.098% step size); mute attenuation −100 dB prevents pop/click artifacts |
Pinout & Package
AD1839AASZ-REEL is housed in a 52-lead MQFP (Metric Quad Flat Package) with exposed thermal pad, specified for −40°C to +85°C industrial operation. Pin layout supports separate analog/digital ground planes (AGND/DGND), dedicated AVDD/DVDD/ODVDD supplies, and integrated reference filtering (FILTR/FILTD pins).
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| OUTL1/OUTR1–OUTL3/OUTR3 | DAC analog outputs | Six single-ended voltage outputs (±1.4 V p-p at 0 dBFS), each referenced to 2.25 V common-mode |
| ADCLP/ADCLN, ADCRP/ADCRN | Differential ADC inputs | High-impedance (4 kΩ), low-capacitance (15 pF) inputs optimized for transformer or op-amp coupling |
| DSDATA1–DSDATA3 | DAC serial data inputs | Three independent 24-bit data streams for stereo DAC pairs; support TDM packing onto one line |
| DLRCLK/DBCLK, ALRCLK/ABCLK | Frame/bit clocks | Configurable as master or slave; M/S pin selects ADC clock direction |
| MCLK | Master clock input | Accepts 256×fS, 512×fS, or 768×fS; internal scaler ensures IMCLK ≤ 24.576 MHz |
| FILTR/FILTD | Reference/filter capacitor terminals | Require 10 µF + 100 nF parallel bypass to stabilize 2.25 V internal reference and reduce DAC noise |
| PD/RST | Power-down/reset input | Active-low; initiates 20-LRCLK initialization sequence and resets all registers to defaults |
Key Features
| Feature | Design Value |
|---|---|
| Triple-stereo DAC architecture | Enables discrete 5.1-channel audio output without external multiplexing or additional codecs |
| Data-directed scrambling | Reduces DAC sensitivity to clock jitter - critical when sharing system clocks with noisy digital logic |
| On-chip 2.25 V reference | Eliminates need for external precision reference; usable to bias external op-amps to match I/O common-mode |
| Clickless software mute | Prevents audible transients during volume transitions or channel muting in real-time audio processing |
| TDM256/512 interface mode | Allows 8-in/8-out audio routing over single serial port - reduces PCB trace count and simplifies SHARC DSP interfacing |
Applications
| DVD Audio Playback | Home Theater Receiver |
|---|---|
Use Scenario: Decoding Dolby Digital and DTS bitstreams into multi-channel analog audio for speaker amplification. IC Role / Device Role / Timing Role: Primary audio codec handling simultaneous 6-channel DAC output and stereo ADC return path for microphone input or analog source digitization. Use Value: 108 dB DAC SNR and −92 dB THD+N ensure transparent reproduction of high-resolution DVD-Audio content without added noise floor or harmonic distortion. | Use Scenario: Central audio processing unit in 5.1/7.1 surround sound receivers managing HDMI/SPDIF inputs, DSP effects, and multi-zone analog outputs. IC Role / Device Role / Timing Role: System-level audio hub providing synchronized ADC capture and DAC playback across multiple channels with shared MCLK domain. Use Value: TDM256 mode enables full 8-in/8-out capability using one SHARC SPORT, reducing interconnect complexity and eliminating timing skew between channels. |
| Automotive Infotainment | Digital Audio Effects Processor |
Use Scenario: Audio subsystem in premium vehicle head units supporting Bluetooth streaming, USB playback, and voice command input. IC Role / Device Role / Timing Role: Dual-role codec performing high-SNR ADC acquisition of cabin microphones and low-distortion DAC output to amplifier stages. Use Value: −40°C to +85°C rating and robust PSRR (−75 dB at 20 kHz) ensure stable performance despite automotive power supply noise and thermal cycling. | Use Scenario: Real-time effects engine applying reverb, chorus, or pitch-shifting to live instrument signals before recording or stage monitoring. IC Role / Device Role / Timing Role: Low-latency audio interface with independent volume control per channel enabling precise wet/dry mix balancing. Use Value: 1024-step linear volume control (0.098% resolution) allows sub-decibel gain adjustments essential for professional-grade effect blending. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar audio codec applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| AK4396VN | Single stereo DAC (2-channel), no integrated ADC; 112 dB DAC SNR; supports 384 kHz native sampling | Lacks ADC functionality and multi-DAC channel count; suited for pure playback-only systems | Select when only high-fidelity DAC performance is required and ADC is handled externally |
| CS4385-CQZ | Octal DAC (8-channel), no ADC; 114 dB SNR; requires external reference; 48-pin TQFP | Higher channel count but no ADC or TDM support; no on-chip volume control per channel | Choose for multi-zone audio distribution where independent ADC is unnecessary and board space favors smaller package |
Compared with AK4396VN and CS4385-CQZ, AD1839AASZ-REEL uniquely integrates dual ADC + triple stereo DAC in one IC with TDM, on-chip reference, and per-channel volume control - making it optimal for compact, self-contained audio systems requiring bidirectional high-resolution conversion.
Availability
AD1839AASZ-REEL is available at Aetrix Electronics and suitable for DVD players, home theater receivers, and automotive infotainment systems requiring stable component supply, long-lifecycle assurance, and industrial temperature compliance.
Supply support for AD1839AASZ-REEL 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-REEL belongs to Analog Devices' high-fidelity audio codec product line, designed specifically for multi-channel consumer and automotive audio systems demanding simultaneous high-SNR ADC capture and low-distortion DAC playback with minimal external components.
FAQ
What is the maximum supported sample rate for ADC and DAC functions in AD1839AASZ-REEL?
The AD1839AASZ-REEL supports up to 96 kHz for its dual-channel ADC. For DAC operation, only DAC1 accepts 192 kHz input data; the other five DAC channels operate up to 96 kHz. When DAC1 runs at 192 kHz, the stereo replicate feature can distribute that data stream to all three stereo DAC pairs - enabling synchronized high-sample-rate playback across all six channels. This behavior is explicitly documented in the AD1839A Rev. B datasheet Functional Overview section.
Does AD1839AASZ-REEL include an internal voltage reference, and how is it used?
Yes, AD1839AASZ-REEL integrates a 2.25 V nominal internal voltage reference brought out on the FILTR pin. This reference serves as the common-mode bias for all analog inputs and outputs, and may be used to bias external op-amps to match the codec's I/O DC level. The FILTR pin must be bypassed with a parallel 10 µF + 100 nF capacitor placed as close as possible to the pin. Current draw from FILTR must remain below 50 µA to maintain accuracy, as stated in the Power Supply and Voltage Reference section of the AD1839A Rev. B datasheet.
How does the TDM interface mode work on AD1839AASZ-REEL, and what configurations are supported?
AD1839AASZ-REEL supports TDM256 and TDM512 modes, enabling 8-in/8-out audio routing over a single serial data line. In TDM256 mode (48/96 kHz), 256 time slots per frame carry data for eight channels (four ADC + four DAC). In TDM512 mode (48 kHz only), 512 slots support expanded channel counts. The device can act as master or slave via the M/S pin, and timing is derived from MCLK. This capability is confirmed in the Auxiliary TDM Mode section and Table 2 timing specifications of the AD1839A Rev. B datasheet.
What are the power supply requirements for AD1839AASZ-REEL, and how should they be decoupled?
AD1839AASZ-REEL requires three supplies: AVDD = 5 V (analog), DVDD = 5 V (digital core), and ODVDD = 3.0–5.0 V (digital I/O interface). Each supply must be decoupled with a 100 nF ceramic capacitor placed adjacent to the respective pin, plus a bulk 22 µF aluminum electrolytic capacitor on the PCB. The FILTR and FILTD pins require dedicated 10 µF + 100 nF networks. These requirements are specified in the Power Supply and Voltage Reference section and Absolute Maximum Ratings table of the AD1839A Rev. B datasheet.
Can AD1839AASZ-REEL operate with a 3.3 V digital interface while using 5 V analog supplies?
Yes, AD1839AASZ-REEL supports mixed-voltage operation: AVDD and DVDD are supplied at 5 V, while ODVDD can be set to 3.3 V to interface directly with 3.3 V logic devices. All digital I/O pins (CIN, CCLK, COUT, DSDATAx, etc.) are 3.3 V tolerant when ODVDD = 3.3 V, with input thresholds defined as VIH = 2.4 V and VIL = 0.8 V. This configuration is explicitly validated in the Features list and Digital I/O specifications of the AD1839A Rev. B datasheet.
AD1839AASZ-REEL Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Analog Devices Inc.
- Series:
- -
- Package/Case:
- 52-QFP
- Packaging:
- Bulk
- 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-REEL FAQ
1.How can I place an order for AD1839AASZ-REEL through Aetrix?
Please submit a Request for Quotation (RFQ) for AD1839AASZ-REEL 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-REEL reliable?
The price and inventory of AD1839AASZ-REEL are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for AD1839AASZ-REEL is usually 5 days.
3.What payment methods are accepted for AD1839AASZ-REEL?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for AD1839AASZ-REEL transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for AD1839AASZ-REEL?
AD1839AASZ-REEL orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your AD1839AASZ-REEL 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-REEL?
For technical support, including AD1839AASZ-REEL datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your AD1839AASZ-REEL requirements.
6.How does Aetrix verify that AD1839AASZ-REEL is sourced from the original manufacturer or authorized distributors?
All AD1839AASZ-REEL 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-REEL meets industry standards.
7.What is the process for return or replacement of AD1839AASZ-REEL?
All AD1839AASZ-REEL units undergo pre-shipment inspection (PSI). If there is an issue with AD1839AASZ-REEL, 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-REEL part is unused and in its original packaging.
Return procedure for AD1839AASZ-REEL:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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