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Analog Devices Inc. AD1839AS-REEL
- Part No.:
- AD1839AS-REEL
- Manufacturer:
- Analog Devices Inc.
- Category:
- CODECS
- Package:
- 52-QFP
- Datasheet:
-
AD1839AS-REEL.pdf
- Description:
- IC CODEC 2ADC/6DAC 24 BIT 52MQFP
- Quantity:
- Payment:
- Shipping:
Inventory:1,600
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Product details
Overview
AD1839AS-REEL from Analog Devices is a 24-bit stereo audio codec IC integrating two high-fidelity ADCs and six DAC channels (three independent stereo pairs) in a single 52-lead MQFP package. It delivers –95 dB THD+N and 105 dB SNR on ADC, –92 dB THD+N and 108 dB SNR on DAC, supports up to 96 kHz sample rates (192 kHz on DAC1), and operates across –40°C to +85°C for industrial audio systems.
For engineers reviewing the AD1839AS-REEL datasheet, AD1839AS-REEL pinout, AD1839AS-REEL application, or AD1839AS-REEL equivalent, key selection considerations include its triple-stereo DAC architecture with per-channel 1024-step volume control, TDM-capable 8-in/8-out auxiliary interface, I²S/DSP/Left-Justified serial port flexibility, and 3.3 V–tolerant digital I/O powered by ODVDD.
Technical Context
The AD1839AS-REEL implements multibit Σ-Δ modulation for both ADC and DAC paths, with patented differential linearity restoration to suppress idle tones and reduce noise floor. Its decimation filters (120 dB stop-band attenuation, ±0.01 dB pass-band ripple at 48 kHz) and interpolation filters (55–80 dB stop-band attenuation, group delay of 110–910 ms depending on sample rate) are fully integrated and digitally programmable.
It features three independent serial data ports: a SPI-compatible 16-bit control port (CCLK/CIN/CLATCH/COUT), a configurable DAC data port supporting I²S/right-justified/left-justified/DSP/packed-256 modes, and an ADC data port with identical format options plus master/slave clocking via M/S pin. The auxiliary TDM interface reassigns pins to enable glueless connection to SHARC® SPORT for 8-channel I/O expansion.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| ADC Resolution | 24-bit - Enables high-fidelity digitization with >105 dB dynamic range and <0.025 dB interchannel gain mismatch. |
| DAC Channels | 6 (3 stereo pairs) - Supports multi-zone audio output (e.g., front/rear/subwoofer) with independent volume control per channel. |
| Max Sample Rate | 96 kHz ADC / 192 kHz DAC1 - Allows CD-quality and DVD-Audio playback; 192 kHz limited to DAC1 with stereo replicate to other DACs. |
| THD+N (ADC) | –95 dB - Ensures minimal distortion in recording paths; measured at 1.0078 kHz, 0 dBFS, 20 Hz–20 kHz BW. |
| THD+N (DAC) | –92 dB - Delivers clean analog output for premium playback; verified at 1.0078 kHz, 1.0 dBFS, same bandwidth. |
| Volume Control | 1024 linear steps (0.098% step size, 60 dB range) - Enables precise, clickless attenuation without audible stepping artifacts. |
| Digital I/O Voltage | 3.3 V tolerant (ODVDD = 3.0–DVDD V) - Permits direct interfacing with low-voltage DSPs/FPGAs without level shifters. |
| Package | 52-lead MQFP (S-52) - Surface-mount footprint compatible with industrial PCB assembly; thermal pad not present. |
Pinout & Package
AD1839AS-REEL is housed in a 52-lead plastic MQFP (S-52) package with 0.65 mm lead pitch and exposed paddle not connected internally. Pin functions are validated per Analog Devices' Rev. B datasheet (pp. 7–8), including dedicated analog/digital ground separation (AGND/DGND), dual power domains (AVDD/DVDD/ODVDD), and reconfigurable auxiliary/TDM pin mapping.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| 1, 39 DVDD | Digital power supply input | 5 V supply for digital logic and serial interfaces; requires local 100 nF ceramic bypass. |
| 2 CLATCH | SPI control latch input | Edge-triggered strobe synchronizing 16-bit control word into internal register bank. |
| 3 CIN | SPI serial data input | Accepts MSB-first 16-bit command words for configuring ADC/DAC registers and reading peak detectors. |
| 4 PD/RST | Active-low power-down/reset | Puts device in low-power state (<280 mW) and resets all registers; initialization requires ~20 LRCLK cycles post-deassertion. |
| 7, 13, 26 OUTLx | DAC left-channel analog output | Single-ended voltage output referenced to 2.25 V VREF; ±1.4 V swing at 0 dBFS; requires external 3rd-order LPF. |
| 9, 15, 28 OUTRx | DAC right-channel analog output | Identical electrical behavior to OUTLx; each pair (e.g., OUTL1/OUTR1) forms one stereo DAC channel. |
| 20, 21 ADCLN/ADCLP | Differential ADC left-input pair | Fully differential input with ±2.828 V full-scale range and 4 kΩ input impedance; common-mode voltage fixed at 2.25 V. |
| 47 MCLK | Master clock input | Accepts 12.288 MHz (48 kHz), 24.576 MHz (96 kHz), or 49.152 MHz (192 kHz) clocks; internal scaler supports ×1, ×2, or ×2/3 division. |
Key Features
| Feature | Design Value |
|---|---|
| Data-directed scrambling DACs | Reduces sensitivity to master clock jitter (<300 ps rms recommended), minimizing tone generation in noisy clock environments. |
| On-chip 2.25 V reference (FILTR) | Stable, low-drift (±5% gain error, 35 ppm/°C drift) reference shared by ADC/DAC analog sections and available for external op-amp biasing. |
| Flexible serial port modes | I²S, left/right-justified, DSP, and packed-256 TDM formats supported on both ADC and DAC ports-enabling glueless integration with SHARC®, Blackfin®, and AES/EBU receivers. |
| Clickless mute & volume control | Software-controlled muting (–100 dB attenuation) and smooth 1024-step linear-volume ramping prevent pop/click during real-time audio routing. |
| Auxiliary TDM interface | Reconfigures 8 pins to support 8-in/8-out operation using a single SHARC SPORT, eliminating need for external multiplexers or additional codecs. |
| Power-down modes | Full power-down (<4.5 mA digital current) and soft power-down (retains register state) optimize energy use in battery-powered or standby audio systems. |
Applications
| DVD Audio/Video Player | Home Theater AV Receiver |
|---|---|
Use Scenario: Playback of Dolby Digital and DTS bitstreams with multi-channel analog output to discrete amplifiers. IC Role / Device Role / Timing Role: Primary audio codec handling simultaneous decoding of 6-channel PCM via three stereo DAC pairs, synchronized to system MCLK. Use Value: 108 dB DAC SNR and 1024-step volume control enable high-resolution, low-noise analog output matching premium speaker systems. |
Use Scenario: Central audio processing unit managing HDMI/SPDIF inputs, DSP-based room correction, and multi-zone analog outputs. IC Role / Device Role / Timing Role: Core ADC/DAC engine converting digital sources to analog for preamp stages; auxiliary TDM mode connects to SHARC for real-time FIR filtering. Use Value: Packed-256 TDM and 8-in/8-out capability eliminate external I/O expanders, reducing BOM cost and PCB area in space-constrained chassis. |
| Automotive Infotainment Head Unit | Digital Audio Effects Processor |
Use Scenario: Multi-source audio hub (Bluetooth, USB, tuner) feeding amplified speakers and subwoofers in vehicles with wide temperature variation. IC Role / Device Role / Timing Role: Industrial-grade codec operating from –40°C to +85°C; 3.3 V–tolerant ODVDD interfaces directly with automotive-grade DSPs. Use Value: Dual-domain power supplies (AVDD/DVDD) and separate ODVDD allow clean analog performance despite noisy vehicle electrical environment. |
Use Scenario: Real-time effects unit applying reverb, chorus, and EQ to live instrument signals before analog output. IC Role / Device Role / Timing Role: High-SNR ADC captures clean input; DACs reconstruct processed signal with minimal added distortion or latency. Use Value: –95 dB ADC THD+N and 910 ms group delay at 48 kHz ensure transparent signal path critical for professional-grade effects processing. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar audio codec applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| AK4384VN | 4-channel DAC only (no integrated ADC); 114 dB DAC SNR; supports 192 kHz on all channels; QFN-48 package. | Lacks ADC functionality-requires external ADC for bidirectional audio; better suited for pure playback systems. | Select when ADC is unnecessary and higher DAC SNR or smaller footprint is prioritized over integrated conversion. |
| CS4382-KQZ | 8-channel DAC only; no ADC; 114 dB SNR; supports 192 kHz; TSSOP-48; lacks TDM auxiliary interface and 3.3 V–tolerant I/O. | Designed for fixed-format multi-DAC systems (e.g., studio monitors); no SPI control port-uses I²C only. | Choose for high-channel-count DAC-only applications where I²C control and compact packaging outweigh need for ADC or flexible serial protocols. |
Compared with AK4384VN and CS4382-KQZ, AD1839AS-REEL uniquely combines dual ADCs, six DACs, SPI control, 3.3 V–tolerant I/O, and reconfigurable TDM-making it optimal for embedded audio systems requiring full-duplex, multi-zone, and expandable I/O in a single IC.
Availability
AD1839AS-REEL is available at Aetrix Electronics and suitable for DVD players, home theater receivers, and automotive infotainment systems requiring stable component supply, long-lifecycle support, and industrial temperature compliance.
Supply support for AD1839AS-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 AD1839AS-REEL belongs to Analog Devices' precision audio codec product line, engineered for professional and industrial audio systems demanding low THD+N, wide dynamic range, and flexible digital interface compatibility.
FAQ
What is the maximum sample rate supported by the AD1839AS-REEL ADC and DAC sections?
The AD1839AS-REEL ADC supports up to 96 kHz sample rate. Its DAC section supports up to 192 kHz-but only on DAC1 (OUTL1/OUTR1). DAC2 and DAC3 are limited to 96 kHz. The stereo replicate feature allows 192 kHz data sent to DAC1 to be copied to DAC2 and DAC3 for synchronized multi-channel output at lower effective resolution.
Does the AD1839AS-REEL require external anti-aliasing or reconstruction filters?
Yes-the AD1839AS-REEL requires external analog filters. Its DAC outputs are single-ended, DC-biased at 2.25 V, and contain out-of-band Σ-Δ noise. A third-order external low-pass filter is recommended to suppress high-frequency noise and prevent aliasing. Similarly, external RC anti-aliasing filters are advised on ADC inputs to limit bandwidth before sampling.
How does the auxiliary (TDM) interface of the AD1839AS-REEL expand channel count?
The AD1839AS-REEL's auxiliary interface reassigns 8 pins (ASDATA, DSDATA1–3, AAUXDATA3, ALRCLK, ABCLK, DAUXDATA) to support 8-in/8-out operation. In this mode, it interfaces with up to three external stereo ADCs and one external stereo DAC-or directly with a SHARC® DSP SPORT-enabling full 8-channel I/O without external multiplexers or additional codecs.
Can the AD1839AS-REEL operate with a 3.3 V digital supply?
Yes-the AD1839AS-REEL features a dedicated ODVDD pin that accepts 3.0 V to DVDD (5.0 V), enabling direct connection to 3.3 V logic families. DVDD remains at 5 V for digital core operation, while ODVDD powers only the digital I/O buffers-ensuring robust 3.3 V–tolerant signaling without level shifters.
What is the purpose of the FILTD and FILTR pins on the AD1839AS-REEL?
FILTD connects to an external capacitor (recommended 10 µF || 100 nF) to reduce noise from the internal DAC bias circuitry, lowering DAC output noise floor. FILTR brings out the internal 2.25 V reference voltage and must be bypassed with the same capacitor network; it serves as a stable reference for ADC/DAC analog sections and may bias external op amps.
AD1839AS-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)
AD1839AS-REEL FAQ
1.How can I place an order for AD1839AS-REEL through Aetrix?
Please submit a Request for Quotation (RFQ) for AD1839AS-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 AD1839AS-REEL reliable?
The price and inventory of AD1839AS-REEL are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for AD1839AS-REEL is usually 5 days.
3.What payment methods are accepted for AD1839AS-REEL?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for AD1839AS-REEL transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for AD1839AS-REEL?
AD1839AS-REEL orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your AD1839AS-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 AD1839AS-REEL?
For technical support, including AD1839AS-REEL datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your AD1839AS-REEL requirements.
6.How does Aetrix verify that AD1839AS-REEL is sourced from the original manufacturer or authorized distributors?
All AD1839AS-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 AD1839AS-REEL meets industry standards.
7.What is the process for return or replacement of AD1839AS-REEL?
All AD1839AS-REEL units undergo pre-shipment inspection (PSI). If there is an issue with AD1839AS-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 AD1839AS-REEL part is unused and in its original packaging.
Return procedure for AD1839AS-REEL:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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