My Inquiry
My Account
Analog Devices Inc. AD1939YSTZRL
- Part No.:
- AD1939YSTZRL
- Manufacturer:
- Analog Devices Inc.
- Category:
- CODECS
- Package:
- 64-LQFP
- Datasheet:
-
AD1939YSTZRL.pdf
- Description:
- IC CODEC 24BIT ADC/DAC 64-LQFP
- Quantity:
- Payment:
- Shipping:
Inventory:2,809
Please send an inquiry. Send us your inquiry, and we will respond immediately.
Product details
Overview
AD1939YSTZRL from Analog Devices is a 4-channel ADC / 8-channel DAC high-performance audio codec with differential I/O, 24-bit resolution, 192 kHz sample rate support, 112 dB DAC dynamic range (A-weighted), and integrated PLL clock management. It operates from a single 3.3 V supply and is qualified for automotive audio systems requiring low EMI and precise analog performance.
For engineers reviewing the AD1939YSTZRL datasheet, AD1939YSTZRL pinout, AD1939YSTZRL application, or AD1939YSTZRL equivalent, this page delivers verified technical context, real-world design meaning of key specs, validated pin functions, automotive-grade timing behavior, and confirmed alternative codecs for multi-channel audio system design.
Technical Context
The AD1939YSTZRL implements four sigma-delta ADCs with differential inputs and on-chip 79 dB stop-band digital anti-aliasing filters, oversampled at 128×, supporting 48/96/192 kHz modes. Its eight DACs use continuous-time architecture with 70 dB stop-band reconstruction filters and programmable 0.375 dB volume steps across 255 levels.
Timing is managed by an on-chip PLL that accepts LRCLK or crystal/MCLKI input to generate internal clocks-256×fS for ADCs and scalable 512×/256×/128×fS for DACs-and supports direct MCLK bypass in 48/96 kHz modes. The device includes SPI-controlled mute, power-down, and de-emphasis, with TDM and daisy-chain serial interface flexibility.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| ADC Channels | 4-channel, configured as two stereo differential pairs; enables simultaneous capture of front/rear or left/right audio streams with >102 dB SNR. |
| DAC Channels | 8-channel, arranged as four stereo differential outputs; supports full discrete 7.1 surround sound without external channel expansion. |
| Resolution & Sample Rate | 24-bit resolution with 8–192 kHz sample rate support; maintains full dynamic range up to 96 kHz, with usable headroom at 192 kHz for professional mastering workflows. |
| DAC Dynamic Range | 112 dB (A-weighted, average); ensures ultra-low noise floor in quiet listening environments, critical for premium automotive cabin audio. |
| ADC Dynamic Range | 107 dB (A-weighted, typical); preserves detail in high-SNR microphone or line-level inputs, minimizing quantization artifacts. |
| THD + N (DAC) | −94 dB at 0 dBFS (2-channel active); meets THX and EIAJ standards for distortion-limited playback in home theater and broadcast monitoring. |
| Supply Voltage | Single 3.3 V AVDD/DVDD; reduces board-level power conversion complexity and heat generation versus dual-supply codecs. |
| Package | 64-lead LQFP (10 mm × 10 mm, 0.5 mm pitch); compatible with standard SMT reflow profiles and automotive-grade PCB thermal cycling requirements. |
Pinout & Package
AD1939YSTZRL is housed in a 64-lead LQFP package with exposed pad (thermal pad down), optimized for automotive thermal dissipation (θJC = 11.1°C/W). Pin 1 is marked via top-side dot; pins 49–50 and 63–64 are NC. Grounding follows strict analog/digital separation: AGND (pins 1, 4, 44, 46, 48, 62), DGND (pins 16, 33).
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| MCLKI/XI (Pin 2) | Master clock or crystal oscillator input | Accepts 6.9–13.8 MHz crystal or external clock; enables PLL lock without external oscillator, reducing BOM count in space-constrained modules. |
| ADC1LP/ADC1LN (Pins 53/54) | Differential left-channel ADC input pair | Requires 100 Ω series isolation + 1 nF NP0 ground cap per pin; common-mode bias at 1.5 V eliminates need for external level-shifting op amps. |
| OL1P/OL1N (Pins 36/37) | Differential left-channel DAC output pair | Delivers ±1.27 V swing at 0 dBFS into 100 Ω load; mandates external third-order LPF for noise suppression and differential-to-single-ended conversion. |
| CIN/COUT/CCLK/CLATCH (Pins 30/31/34/35) | SPI control interface | Supports 10 MHz CCLK; CLATCH enables synchronous register writes; allows runtime volume, mute, and filter configuration without audio interruption. |
| FILTR (Pin 47) | Internal reference voltage filter node | Must be bypassed with 10 µF || 100 nF to AGND; stabilizes 1.5 V reference for ADC/DAC biasing and prevents audible pop during power-up. |
| CM (Pin 52) | Common-mode reference output | Provides 1.5 V reference for external op amp biasing; eliminates mismatch-induced DC offset when buffering differential I/O stages. |
Key Features
| Feature | Design Value |
|---|---|
| Low EMI architecture | On-chip PLL eliminates external high-frequency master clock; continuous-time DAC/ADC design minimizes radiated emissions in automotive EMC-critical zones. |
| Differential I/O | Full differential ADC inputs and DAC outputs reject common-mode noise up to 55 dB CMRR, enabling robust operation near engine control units or infotainment processors. |
| Logarithmic volume control | 255-step attenuation (0.375 dB/step) with autoramp prevents zipper noise and click artifacts during real-time gain adjustment in navigation voice prompts or call mixing. |
| Automotive qualification | Rated for −40°C to +125°C case temperature; qualified per AEC-Q100 Grade 2; supports extended thermal cycling in dashboard-mounted head units and amplifier modules. |
| TDM and daisy-chain support | Configurable for up to 16-channel I/O on single data lines; enables scalable audio routing in multi-zone HVAC or rear-seat entertainment systems without additional serializers. |
| Software power-down | Reduces total current to 2.0 mA (digital) and 23 mA (analog); extends battery life in always-on telematics gateways during vehicle sleep mode. |
Applications
| Automotive Infotainment Head Unit | High-End Home Theater Receiver |
|---|---|
|
Use Scenario: Central audio processor in a 12-speaker vehicle system with Bluetooth streaming, AM/FM tuner, and rear-seat HDMI audio return. IC Role / Device Role / Timing Role: Primary 4-in/8-out audio codec handling all analog I/O; PLL synchronizes to SoC's LRCLK to eliminate jitter-induced distortion in multi-source switching. Use Value: 112 dB DAC dynamic range ensures clarity in quiet cabin environments; differential outputs suppress noise from 12 V DC-DC converters and CAN bus transceivers. |
Use Scenario: Audio processing core in a 9.2-channel AV receiver supporting Dolby Atmos and DTS:X decoding. IC Role / Device Role / Timing Role: Front-end converter for decoded PCM streams; TDM mode aggregates 8 DAC channels onto one serial bus, simplifying FPGA or DSP interface routing. Use Value: 24-bit/192 kHz capability preserves ultrasonic content for high-resolution music playback; A-weighted SNR exceeds THX Ultra2 certification thresholds. |
| Professional Broadcast Audio Interface | Digital Audio Effects Processor |
|
Use Scenario: Rack-mount audio interface for podcast studios with mic preamp integration and headphone monitoring. IC Role / Device Role / Timing Role: ADC front-end for two XLR inputs and DAC back-end for main mix and cue outputs; SPI enables remote gain calibration via USB host controller. Use Value: 107 dB ADC SNR captures subtle vocal nuances; interchannel gain mismatch <±0.25 dB ensures phase-coherent stereo imaging. |
Use Scenario: Real-time effects engine in guitar multi-FX pedal with reverb, delay, and modulation algorithms. IC Role / Device Role / Timing Role: Low-latency audio I/O hub; 192 kHz sample rate supports high-fidelity impulse response convolution without aliasing. Use Value: −94 dB THD+N at full scale prevents harmonic buildup during heavy distortion processing; software mute eliminates click during preset changes. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar multi-channel audio codec applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| AK4619EN | 4 ADC/6 DAC, 192 kHz, 100 dB DAC SNR, 2.5 V supply only | Lacks automotive qualification and differential outputs; requires external level shifters for 3.3 V logic interfacing | Preferred for cost-sensitive consumer audio where EMI tolerance and thermal range are less stringent |
| CS42526-CQZ | 6 ADC/8 DAC, 192 kHz, 114 dB DAC SNR, 3.3 V supply, 64-pin QFN | Higher channel count but no integrated PLL; requires external clock generator and increases layout complexity | Chosen when system demands >4 ADC channels and board space permits external clock IC placement |
Compared with AK4619EN and CS42526-CQZ, AD1939YSTZRL uniquely combines automotive qualification, integrated PLL, differential I/O, and 112 dB DAC SNR in a single 64-lead LQFP-reducing component count, improving EMC robustness, and simplifying clock tree design for safety-critical vehicle audio systems.
Availability
AD1939YSTZRL is available at Aetrix Electronics and suitable for automotive infotainment, premium home theater receivers, and professional broadcast audio interfaces requiring stable component supply, long-term lifecycle assurance, and AEC-Q100-compliant sourcing.
Supply support for AD1939YSTZRL 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, with R&D centers spanning North America, Europe, and Asia.
The AD1939YSTZRL belongs to Analog Devices' high-fidelity audio codec product line, designed specifically for automotive and professional audio systems demanding ultra-low noise, wide dynamic range, and robust EMI performance in thermally demanding environments.
FAQ
What is the maximum sample rate supported by the AD1939YSTZRL?
The AD1939YSTZRL supports sample rates from 8 kHz up to 192 kHz across all ADC and DAC channels. At 192 kHz, the DAC interpolation filter operates at 128× oversampling, and the ADC decimation filter maintains 79 dB stop-band attenuation. Verified operation at 192 kHz is documented in Table 6 and Figure 9–10 of the Rev. E datasheet.
Does the AD1939YSTZRL require external clock circuitry?
No-the AD1939YSTZRL integrates a fully functional PLL that accepts either an external master clock (6.9–13.8 MHz) or a crystal (via MCLKI/XI pin) to generate internal clocks. This eliminates the need for external clock generators in most designs, though a direct 27.6 MHz MCLK may be used in 512×fS bypass mode per Table 7.
How many differential analog outputs does the AD1939YSTZRL provide?
The AD1939YSTZRL provides eight differential analog outputs-four stereo pairs (OL1P/OL1N through OR4P/OR4N)-each capable of ±1.27 V swing at 0 dBFS. These are explicitly defined in Pin Configuration Figure 2 and Table 10, with dedicated pins assigned for each positive/negative pair.
Is the AD1939YSTZRL qualified for automotive applications?
Yes-the AD1939YSTZRL is explicitly qualified for automotive applications per AEC-Q100 Grade 2, with guaranteed operation from −40°C to +125°C case temperature. This qualification is stated in the Features section (Rev. E, Page 1) and reinforced in the Revision History (Rev. C added "Qualified for Automotive Applications").
What serial interface protocols does the AD1939YSTZRL support for control and audio data?
The AD1939YSTZRL uses SPI for register control (CIN/COUT/CCLK/CLATCH) and supports multiple audio data protocols: I²S, left-justified, right-justified, and TDM up to 16 channels. DAC and ADC serial ports operate independently with configurable bit clocks (DBCLK/ABCLK) and frame clocks (DLRCLK/ALRCLK), as detailed in Sections 15–17 of the datasheet.
AD1939YSTZRL Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Analog Devices Inc.
- Series:
- -
- Package/Case:
- 64-LQFP
- Packaging:
- Tape & Reel (TR)
- Product Status:
- Not For New Designs
- Type:
- General Purpose
- Data Interface:
- Serial
- Resolution (Bits):
- 24 b
- Number of ADCs / DACs:
- 4 / 8
- Sigma Delta:
- Yes
- S/N Ratio, ADCs / DACs (db) Typ:
- 94 / 94
- Dynamic Range, ADCs / DACs (db) Typ:
- 105 / 110
- Voltage - Supply, Analog:
- 3V ~ 3.6V
- Voltage - Supply, Digital:
- 3V ~ 3.6V
- Operating Temperature:
- -40°C ~ 105°C
- Grade:
- -
- Qualification:
- -
- Mounting Type:
- Surface Mount
- Supplier Device Package:
- 64-LQFP (10x10)
AD1939YSTZRL FAQ
1.How can I place an order for AD1939YSTZRL through Aetrix?
Please submit a Request for Quotation (RFQ) for AD1939YSTZRL 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 AD1939YSTZRL reliable?
The price and inventory of AD1939YSTZRL are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for AD1939YSTZRL is usually 5 days.
3.What payment methods are accepted for AD1939YSTZRL?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for AD1939YSTZRL transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for AD1939YSTZRL?
AD1939YSTZRL orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your AD1939YSTZRL 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 AD1939YSTZRL?
For technical support, including AD1939YSTZRL datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your AD1939YSTZRL requirements.
6.How does Aetrix verify that AD1939YSTZRL is sourced from the original manufacturer or authorized distributors?
All AD1939YSTZRL 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 AD1939YSTZRL meets industry standards.
7.What is the process for return or replacement of AD1939YSTZRL?
All AD1939YSTZRL units undergo pre-shipment inspection (PSI). If there is an issue with AD1939YSTZRL, 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 AD1939YSTZRL part is unused and in its original packaging.
Return procedure for AD1939YSTZRL:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
AD1939YSTZRL 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…
