My Inquiry
My Account
Analog Devices Inc. AD1838AAS-REEL
- Part No.:
- AD1838AAS-REEL
- Manufacturer:
- Analog Devices Inc.
- Category:
- CODECS
- Package:
- 52-QFP
- Datasheet:
-
AD1838AAS-REEL.pdf
- Description:
- IC CODEC 2ADC/6DAC 24 BIT 52MQFP
- Quantity:
- Payment:
- Shipping:
Inventory:9,600
Please send an inquiry. Send us your inquiry, and we will respond immediately.
Product details
Overview
AD1838AAS-REEL from Analog Devices is a 24-bit, 96 kHz stereo audio codec IC integrating three independent stereo DACs (6 channels) and one stereo ADC (2 channels), operating from dual 5 V analog/digital supplies with 3.3 V–tolerant digital I/O. It delivers –95 dB THD+N and 108 dB DAC SNR at 48/96 kHz, supports I²S/DSP/TDM serial interfaces, and targets high-fidelity consumer audio systems requiring multi-channel playback and recording.
For engineers reviewing the AD1838AAS-REEL datasheet, AD1838AAS-REEL pinout, AD1838AAS-REEL application, or AD1838AAS-REEL equivalent, key selection considerations include its triple-DAC architecture for multi-zone audio, differential analog I/O for noise immunity, on-chip 2.25 V reference, SPI-controlled volume/mute, and support for 192 kHz on DAC1-critical for DVD-Audio, home theater AVRs, and automotive infotainment platforms.
Technical Context
The AD1838AAS-REEL implements sigma-delta modulation with multibit DACs featuring data-directed scrambling for jitter insensitivity and perfect differential linearity restoration to suppress idle tones. Its ADC uses 128× oversampling at 48 kHz (64× at 96 kHz) with 120 dB stop-band attenuation decimation filters, while each DAC employs programmable interpolation (8×/4×/2×) supporting 48/96/192 kHz sample rates.
It features three independent serial data ports (DSDATA1–3) for discrete stereo DAC control, plus TDM256/512 modes enabling 8-in/8-out operation via a single SHARC SPORT. The SPI-compatible control port manages all registers-including per-channel 1024-step linear volume, clickless mute, and digital de-emphasis-with asynchronous operation up to 12.5 MHz.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| DAC Resolution | 24-bit-enables >144 dB theoretical dynamic range and precise low-level signal resolution in professional audio paths. |
| ADC SNR / THD+N | 105 dB / –95 dB-measured 20 Hz–20 kHz, A-weighted; ensures clean microphone/line input capture with minimal quantization and harmonic distortion. |
| DAC SNR / THD+N | 108 dB / –95 dB-supports high-fidelity playback with ultra-low noise floor and negligible harmonic artifacts in speaker/headphone outputs. |
| Sample Rates | 48/96 kHz ADC; 48/96/192 kHz DAC (DAC1 only)-allows backward compatibility with CD/DVD standards and forward readiness for high-res audio sources. |
| Volume Control | 1024-step linear scale, 60 dB range-provides fine-grained, monotonic gain adjustment without zipper noise in real-time level control. |
| Supply Voltages | AVDD/DVDD = 4.5–5.5 V; ODVDD = 3.0–DVDD-enables direct interfacing with 3.3 V DSPs/FPGAs while maintaining full analog performance. |
| Package | 52-lead MQFP (S-52-1)-industrial-grade surface-mount package with 0.65 mm pitch, suitable for automated assembly in audio subsystem PCBs. |
Pinout & Package
AD1838AAS-REEL is housed in a 52-lead MQFP (S-52-1) package with exposed thermal pad, specified for –40°C to +85°C operation. Pin functions are validated per Analog Devices AD1838A Rev. A datasheet Figure 7 and Pin Function Descriptions table.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| OUTLP1/OUTLN1–OUTRP3/OUTRN3 | Differential DAC analog outputs (x3 stereo pairs) | Enable balanced drive to external op-amps or transformers, reducing common-mode noise and improving PSRR in noisy automotive/AVR environments. |
| ADCLP/ADCLN, ADCRP/ADCRN | Differential ADC analog inputs | Accept ±2.828 V full-scale differential signals with 4 kΩ input impedance-ideal for microphone preamp or line-level interface without external gain stages. |
| MCLK, DLRCLK, DBCLK, ALRCLK, ABCLK | Master and serial clock inputs/outputs | Support flexible clock sourcing: MCLK at 12.288 MHz (256×fs), with internal scaler; LRCLK/DBCLK configurable as master or slave for system-level synchronization. |
| DSDATA1–3, ASDATA | Serial audio data I/O | Three dedicated DAC data inputs allow independent channel routing; ASDATA provides single-pin ADC output in TDM mode for SHARC SPORT glueless interfacing. |
| CIN, CCLK, CLATCH, COUT | SPI-compatible control port | 4-wire interface (16-bit words, ≤12.5 MHz) enables register read/write without disrupting audio streaming-essential for runtime mute/volume updates. |
Key Features
| Feature | Design Value |
|---|---|
| Differential analog I/O | Reduces EMI susceptibility and improves PSRR by >70 dB-critical for automotive audio where battery noise and RF interference degrade signal integrity. |
| Data-directed scrambling DACs | Minimizes sensitivity to master clock jitter (<300 ps rms), preventing audible sidebands and noise modulation in crystal oscillator–based timing systems. |
| On-chip 2.25 V reference (FILTR) | Provides stable bias for external op-amps and eliminates need for discrete voltage references-reducing BOM count and layout complexity in compact AV receivers. |
| TDM256/512 interface mode | Enables 8-in/8-out operation using one SHARC SPORT, eliminating multiplexers and simplifying firmware for multi-channel effects processors and studio interfaces. |
| Soft power-down + hardware PD/RST | Reduces total supply current to 280 mW (vs. 740 mW active); reset clears all registers and initializes filter memories-ensuring deterministic startup in embedded audio boot sequences. |
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 5.1/6.1 channel DAC conversion, sample rate conversion, and digital de-emphasis for legacy media formats. Use Value: Triple-DAC architecture allows simultaneous output to front, surround, and subwoofer channels without time-division multiplexing-preserving phase coherence across all speakers. |
Use Scenario: Integrated audio processing hub receiving HDMI/SPDIF inputs and driving 7.1 analog pre-outs. IC Role / Device Role / Timing Role: Central mixed-signal interface converting digital audio streams to analog, managing volume/mute per zone, and synchronizing with video timing via shared MCLK. Use Value: 1024-step linear volume control and clickless mute enable seamless UI-driven level adjustments without audible artifacts during source switching or menu navigation. |
| Automotive Infotainment Head Unit | Digital Audio Effects Processor |
Use Scenario: In-vehicle entertainment system with Bluetooth audio, USB playback, and rear-seat entertainment outputs. IC Role / Device Role / Timing Role: High-SNR ADC captures microphone input for voice commands; DACs drive front/rear/sub zones with independent volume control. Use Value: Differential inputs reject engine noise and alternator ripple; 3.3 V–tolerant digital I/O simplifies interface to automotive-grade microcontrollers operating at lower core voltages. |
Use Scenario: Real-time reverb, chorus, and EQ processing in stage/studio gear with analog I/O expansion. IC Role / Device Role / Timing Role: Low-latency audio interface bridging SHARC DSP serial ports to analog world-leveraging TDM256 mode for 8-channel bidirectional streaming. Use Value: Glueless SHARC SPORT connection eliminates FPGA logic and reduces firmware overhead; 192 kHz DAC1 supports high-resolution effect rendering for mastering applications. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar audio codec applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| AK4384VT-F | 24-bit, 192 kHz stereo DAC only (no integrated ADC); requires external ADC for full codec functionality. | Suitable for playback-only systems (e.g., CD transports), not for record+playback AVRs or voice-enabled devices. | Select when system already includes a separate high-performance ADC and only DAC capability is needed-reduces cost and complexity in fixed-function players. |
| CS4382-KQZ | 8-channel DAC (no ADC); 114 dB SNR, 24-bit, 192 kHz; lacks differential outputs and on-chip reference. | Better suited for multi-channel pro-audio DAC cards where external op-amps and precision references are used. | Choose for studio monitor controllers needing higher channel count and lower THD+N than AD1838AAS-REEL-but only if ADC functionality is handled elsewhere. |
Compared with AK4384VT-F and CS4382-KQZ, AD1838AAS-REEL uniquely integrates both high-SNR ADC and triple-DAC functionality with differential I/O and on-chip reference in a single MQFP package-making it optimal for space-constrained, full-featured consumer and automotive audio systems requiring no external signal conditioning.
Availability
AD1838AAS-REEL is available at Aetrix Electronics and suitable for DVD players, home theater AV receivers, and automotive infotainment systems requiring stable component supply across extended production lifecycles.
Supply support for AD1838AAS-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 is a global leader in high-performance analog, mixed-signal, and digital signal processing semiconductors, founded in 1965 and headquartered in Wilmington, MA.
The AD1838AAS-REEL belongs to Analog Devices' high-fidelity audio codec product line, designed specifically for consumer and automotive audio systems demanding low THD+N, wide dynamic range, and flexible digital interface options in industrial-temperature packages.
FAQ
What is the maximum sample rate supported by the ADC in AD1838AAS-REEL?
The AD1838AAS-REEL ADC supports up to 96 kHz sample rate, achieved by configuring the decimator to operate at IMCLK/256 (e.g., with 12.288 MHz MCLK). At 48 kHz, it uses IMCLK/512. The ADC does not support 192 kHz operation-only DAC1 among the six DAC channels supports that rate.
Does AD1838AAS-REEL include an on-chip voltage reference, and how is it used?
Yes, AD1838AAS-REEL includes an internal 2.25 V reference brought out on the FILTR pin. It must be bypassed with a parallel 10 µF/100 nF capacitor and can bias external op-amps to match the common-mode voltage (2.25 V) of its differential analog I/O pins-eliminating need for external references in most designs.
Can AD1838AAS-REEL interface directly with a 3.3 V DSP without level shifters?
Yes, AD1838AAS-REEL supports 3.3 V–tolerant digital I/O via the ODVDD pin, which accepts 3.0 V to DVDD (5 V). When ODVDD = 3.3 V, all digital interface pins (DSDATAx, ASDATA, DLRCLK, etc.) operate at 3.3 V logic levels-enabling direct, glueless connection to 3.3 V DSPs, FPGAs, or microcontrollers.
How many independent stereo DAC channels does AD1838AAS-REEL provide?
AD1838AAS-REEL provides three independent stereo DAC channels (six total DACs), labeled DAC1, DAC2, and DAC3. Each has dedicated differential outputs (e.g., OUTLP1/OUTLN1 for DAC1 left), independent volume control, and clickless mute-allowing discrete zone control in multi-speaker systems.
What serial audio interface modes does AD1838AAS-REEL support for DAC data input?
AD1838AAS-REEL supports I²S, right-justified, left-justified, DSP-compatible, and packed TDM256/512 modes for DAC data input. Default is I²S; mode selection is controlled via DAC Control Register 1 bits 5–7. Packed modes route all six DAC channels over a single DSDATA1 pin synchronized to DBCLK and DLRCLK.
AD1838AAS-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)
AD1838AAS-REEL FAQ
1.How can I place an order for AD1838AAS-REEL through Aetrix?
Please submit a Request for Quotation (RFQ) for AD1838AAS-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 AD1838AAS-REEL reliable?
The price and inventory of AD1838AAS-REEL are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for AD1838AAS-REEL is usually 5 days.
3.What payment methods are accepted for AD1838AAS-REEL?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for AD1838AAS-REEL transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for AD1838AAS-REEL?
AD1838AAS-REEL orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your AD1838AAS-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 AD1838AAS-REEL?
For technical support, including AD1838AAS-REEL datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your AD1838AAS-REEL requirements.
6.How does Aetrix verify that AD1838AAS-REEL is sourced from the original manufacturer or authorized distributors?
All AD1838AAS-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 AD1838AAS-REEL meets industry standards.
7.What is the process for return or replacement of AD1838AAS-REEL?
All AD1838AAS-REEL units undergo pre-shipment inspection (PSI). If there is an issue with AD1838AAS-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 AD1838AAS-REEL part is unused and in its original packaging.
Return procedure for AD1838AAS-REEL:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
AD1838AAS-REEL Tags
-
NAU88C22YG
Nuvoton Technology Corporation
-
TLV320AIC3100IRHBR
Texas Instruments
-
DA7212-01UM2
Renesas
-
NAU8810YG
Nuvoton Technology Corporation
-
DA7218-00U32
Renesas
-
CMX655DQ6-TR1K
CML Micro
-
SGTL5000XNLA3
NXP Semiconductors
-
TLV320AIC3104IRHBR
Texas Instruments
-
MAX9867EWV+T
Analog Devices Inc./Maxim Integrated
-
MAX9860ETG+T
Analog Devices Inc./Maxim Integrated
-
TLV320AIC3106IRGZR
Texas Instruments
-
SGTL5000XNLA3R2
NXP Semiconductors
Tech Hub
A practical engineering guide to 3.3V and 5V logic compatibility, input thresholds, resistor dividers, translator ICs, MOSFET level shifting, I2C pull-ups, timing limits and power-sequencing risks.
The 74HC595 uses push-pull logic outputs, while the TPIC6B595 uses 50 V open-drain DMOS sinks for higher-power loads. This guide compares timing, current limits, 3.3 V interfacing, load wiring, thermal…
The 74HC595 converts serial data into eight stable parallel outputs. This guide covers pin functions, shift and storage timing, OE and MR behavior, drive-current limits, cascading, voltage compatibilit…
A technical comparison of level-sensitive latches and edge-triggered flip-flops, covering timing windows, setup and hold limits, master–slave operation, time borrowing, race-through, HDL inference and…
A D latch stores one bit while Enable controls when data can pass. This reference covers gate-level operation, truth tables, transparency, setup and hold timing, LE versus OE, common ICs and practical …
An SR latch stores one bit through cross-coupled feedback. This engineering reference covers NOR and NAND implementations, truth tables, forbidden-state recovery, gated operation, switch debouncing, fa…
Latch circuits retain one bit through feedback. This technical reference covers SR and D latches, truth tables, transparency, timing limits, latch-versus-flip-flop behavior, applications and common log…
An engineering guide to LED driver operation, constant-current and constant-voltage outputs, linear and switching topologies, dimming, IC selection, calculations, replacement compatibility, and fault c…
Operational amplifier guide covering op amp basics, feedback, ideal vs real op amps, common configurations, buffer circuits, offset, bias current, gain-bandwidth, slew rate, rail-to-rail limits and sel…
Jumper cables guide covering safe connection order, red and black clamp placement, final ground connection, cable gauge, length, clamp quality, copper vs CCA cables, jump starter comparison and battery…
