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Analog Devices Inc. AD1986JSTZ-REEL
- Part No.:
- AD1986JSTZ-REEL
- Manufacturer:
- Analog Devices Inc.
- Category:
- CODECS
- Package:
- 48-LQFP
- Datasheet:
-
AD1986JSTZ-REEL.pdf
- Description:
- IC CODEC HD AUDIO AC'97 48LQFP
- Quantity:
- Payment:
- Shipping:
Inventory:13,398
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Product details
Overview
AD1986JSTZ-REEL from Analog Devices is an AC '97 2.3-compliant audio codec IC designed for PC motherboard and notebook audio subsystems. It integrates six 24-bit DACs (5.1 surround), dual 20-bit ADCs, S/PDIF output, integrated headphone amplifiers, and a programmable PLL. It delivers >90 dB dynamic range, supports variable sample rates from 7 kHz to 96 kHz, and operates with 5.0 V analog and 3.3 V digital supplies.
For engineers reviewing the AD1986JSTZ-REEL datasheet, AD1986JSTZ-REEL pinout, AD1986JSTZ-REEL application, or AD1986JSTZ-REEL equivalent, key selection considerations include AC '97 2.3 interface compliance, jack-sense–enabled topology switching across up to eight jacks, software-controllable VREF_OUT signals for microphone biasing, and independent LINE_OUT/HP_OUT drive capability with 32 Ω headphone load support.
Technical Context
The AD1986JSTZ-REEL implements a full AC '97 v2.3 Link interface with BIT_CLK (12.288 MHz), SYNC, SDATA_IN, and SDATA_OUT signals, supporting both master and slave clock modes. Its internal architecture includes separate Σ-Δ DAC and ADC paths, a parametric equalizer engine, and a flexible analog mixer with software-selectable input routing (MIC_1/2, LINE_IN, C/LFE, SURR).
It features three independent VREF_OUT outputs (for MIC_1/2, LINE_IN, and C/LFE groups), advanced jack presence detection using two dedicated pins (JACK_SENSE_A/B), and power-down control per functional block (ADC, individual DACs, mixer) via register-accessible PR bits. The device uses a 48-pin LQFP package with segregated analog/digital power and ground pins to maintain SNR integrity.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Audio Interface | AC '97 Revision 2.3 compliant serial link with BIT_CLK, SYNC, SDATA_IN/OUT |
| DAC Resolution | 24-bit Σ-Δ converters for all six channels (Front, Surround, Center/LFE, Mono) |
| ADC Resolution | 20-bit Σ-Δ converters with programmable PGA gain (0–30 dB in 1.5 dB steps) |
| Dynamic Range | 91 dB A-weighted (DAC), 85 dB A-weighted (ADC), enabling CD-quality playback and recording |
| Sample Rate Support | 7 kHz to 96 kHz (1 Hz increments up to 48 kHz; fixed 96 kHz for double-rate mode) |
| Analog Supplies | AVDD = 5.0 V ±10% (or 3.3 V); DVDD = 3.3 V ±10%; separate AVSS/DVSS grounds |
| Package | 48-pin LQFP (7 mm × 7 mm, 0.5 mm pitch), RoHS-compliant, lead-free |
Pinout & Package
AD1986JSTZ-REEL is housed in a 48-pin LQFP package with thermal pad exposed on underside. Pin layout separates analog and digital domains: AVDD/AVSS pins are distributed across sides 1, 3, and 4; DVDD/DVSS occupy corners and side 2; critical analog I/O (LINE_OUT_L/R, HP_OUT_L/R, MIC_1/2, LINE_IN_L/R) are grouped centrally; jack-sense and reference outputs (JACK_SENSE_A/B, VREF_OUT x3) are placed adjacent to respective analog input banks.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| BIT_CLK (Pin 6) | AC Link bit clock input | 12.288 MHz timing reference for serial data transfer; jitter ≤750 ps ensures low THD+N |
| SDATA_IN (Pin 8) | AC Link serial data input | Receives PCM audio frames from host controller; supports slot 3–12 for multi-channel capture |
| LINE_OUT_L/R (Pins 43, 45) | Front channel line-level outputs | Capable of driving 10 kΩ loads or 32 Ω headphones when HPSEL enabled; independent from HP_OUT |
| HP_OUT_L/R (Pins 39, 41) | Headphone driver outputs | Integrated Class-AB amplifiers deliver 1 VRMS into 32 Ω; mute click <±5 mV during state transitions |
| JACK_SENSE_A/B (Pins 16, 17) | Jack presence detection inputs | Enable 8-jack topology sensing using resistor networks; reduce external GPIO requirements by 6 pins vs legacy codecs |
| VREF_OUT (MIC/LINE_IN/C-LFE) (Pins 28, 29, 33) | Programmable microphone bias references | Software-configurable (0–3.7 V) to eliminate external bias resistors for shared MIC/LINE_IN/C-LFE jacks |
Key Features
| Feature | Design Value |
|---|---|
| Integrated parametric equalizer | Real-time 5-band EQ processing with coefficient storage; enables system-level tone shaping without host CPU load |
| Advanced jack sense with auto-switching | Detects insertion on up to 8 jacks using only two pins and software-controlled topology reconfiguration |
| Triple VREF_OUT outputs | Independent bias voltage sources per input group (MIC, LINE_IN, C/LFE); eliminates 3–6 external bias resistors |
| Internal microphone/line-in/C-LFE sharing | Hardware-mixed input routing removes need for external analog switches or op-amps in shared-jack designs |
| Dual-headphone drive capability | LINE_OUT pins double as headphone drivers when LOSEL/HPSEL bits configured; reduces BOM count and PCB area |
Applications
| Desktop PC Audio Subsystem | Notebook Integrated Audio |
|---|---|
Use Scenario: Mainboard audio solution delivering 5.1 surround sound to front panel and rear I/O jacks. IC Role / Device Role / Timing Role: AC '97 codec interfacing with southbridge; handles analog conversion, mixing, jack detection, and S/PDIF output. Use Value: Reduces external component count by integrating VREF generators, headphone amps, and jack-sense logic-cutting BOM cost and layout complexity. | Use Scenario: Space-constrained laptop audio with shared mic/line-in jacks and headset detection. IC Role / Device Role / Timing Role: Primary audio codec managing dual-input routing, stereo mic boost (up to 30 dB), and auto-topology switching on jack insert. Use Value: Enables single-jack headset/mic functionality without external switches; software-controlled VREF_OUT avoids discrete bias networks. |
| Gaming Desktop Sound Card | Industrial Thin Client Terminal |
Use Scenario: Add-in card providing high-fidelity 5.1 output, S/PDIF passthrough, and low-latency recording. IC Role / Device Role / Timing Role: High-SNR audio interface with 91 dB DAC dynamic range and 85 dB ADC SNR; supports 96 kHz double-rate mode. Use Value: Delivers CD-quality playback and studio-grade recording fidelity while maintaining AC '97 compatibility with legacy BIOS/drivers. | Use Scenario: Fanless embedded terminal requiring robust audio I/O, jack presence reliability, and long-term supply stability. IC Role / Device Role / Timing Role: Fixed-function audio codec with industrial temp range (−40°C to +85°C), EAPD control for external amp shutdown, and traceable sourcing. Use Value: Ensures consistent audio performance across temperature extremes; EAPD signal enables power-aware system design and thermal management. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar audio codec applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| AD1985BSTZ | AC '97 2.2 compliant; lacks advanced jack sense (max 4 jacks), no triple VREF_OUT, no parametric EQ | Lower-cost desktop audio where 8-jack detection and software EQ are not required | Select AD1985BSTZ only if AC '97 2.2 compliance suffices and BOM simplification is secondary to cost |
| ALC655-VD | Realtek AC '97 2.3 codec; different register map, no integrated parametric EQ, no VREF_OUT for C/LFE group | Volume OEM motherboard designs prioritizing driver compatibility over feature parity | Choose ALC655-VD for large-scale consumer PC builds where vendor-specific driver stacks are already deployed |
Compared with AD1986JSTZ-REEL, AD1985BSTZ omits jack-sense scalability and VREF flexibility, limiting topology adaptation; ALC655-VD trades parametric EQ and triple VREF for broader BIOS integration but requires external biasing for C/LFE mic use-making AD1986JSTZ-REEL optimal for designs demanding hardware-level audio feature integration and reduced analog support components.
Availability
AD1986JSTZ-REEL is available at Aetrix Electronics and suitable for desktop PC motherboard design, notebook audio subsystem integration, gaming sound card development, and industrial thin client terminals requiring stable component supply and long-lifecycle support.
Supply support for AD1986JSTZ-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 semiconductor leader specializing in high-performance analog, mixed-signal, and digital signal processing technologies for precision signal chain applications.
The AD1986 product line was engineered for AC '97 2.3–compliant PC audio systems, emphasizing integration of jack sensing, microphone biasing, headphone drive, and parametric equalization to reduce external component count and simplify motherboard layout.
FAQ
What is the primary interface standard supported by the AD1986JSTZ-REEL?
The AD1986JSTZ-REEL is fully compliant with the AC '97 Revision 2.3 specification. It implements the standard AC Link interface with BIT_CLK (12.288 MHz), SYNC, SDATA_IN, and SDATA_OUT signals, supporting both master and slave clock modes. This ensures interoperability with Intel southbridges and other AC '97–compatible host controllers. The AD1986JSTZ-REEL also includes AC '97 register mapping and timing compliance verified per Intel's AC '97 2.3 Release 1.0 guidelines.
Does the AD1986JSTZ-REEL support headphone output directly, and what are its drive capabilities?
Yes, the AD1986JSTZ-REEL integrates dual Class-AB headphone amplifiers on HP_OUT_L (Pin 39) and HP_OUT_R (Pin 41). It delivers 1 VRMS full-scale output into a 32 Ω load with ≤75 dB THD+N and mute click <±5 mV. Additionally, LINE_OUT_L/R (Pins 43/45) can be configured as headphone drivers via HPSEL/LOSEL register bits-enabling flexible output routing without external amplifiers. This dual-drive capability is a core feature of the AD1986JSTZ-REEL.
How does the AD1986JSTZ-REEL handle microphone input biasing for shared jacks?
The AD1986JSTZ-REEL provides three independent, software-programmable VREF_OUT signals: VREF_OUT(MIC_1/2) (Pin 28), VREF_OUT(LINE_IN) (Pin 29), and VREF_OUT(C/LFE) (Pin 33). Each can be set to 0 V, 2.25 V, or 3.7 V (at AVDD = 5.0 V) via register bits MVREF[2:0] and CVREF[2:0]. This eliminates external bias resistors when MIC_1/2, LINE_IN, or C/LFE pins are repurposed for microphone input-directly reducing BOM count and improving design flexibility in the AD1986JSTZ-REEL.
What power management features are implemented in the AD1986JSTZ-REEL?
The AD1986JSTZ-REEL supports granular power-down via the Power-Down Control/Status register (0x26). Individual blocks-including ADC (PR0), each DAC (PR1, PRI, PRJ, PRK), mixer (PR2), and headphone standby (PR6)-can be disabled. Full codec standby draws only 0.05 mA (AVDD) with PR5–PR3 asserted. These settings persist across warm resets and enable dynamic power scaling in battery-powered notebooks and energy-efficient desktops-key capabilities built into the AD1986JSTZ-REEL architecture.
Is the AD1986JSTZ-REEL compatible with AC '97 2.2 systems, and what are the implications?
The AD1986JSTZ-REEL is backward-compatible with AC '97 2.2 host controllers at the electrical and protocol level, but some enhanced features-including advanced jack sense (8-jack detection), parametric EQ, and triple VREF_OUT-require AC '97 2.3–aware firmware/drivers. In AC '97 2.2 mode, the AD1986JSTZ-REEL operates functionally as a standard 6-channel codec with basic mixer and DAC/ADC functions. Full utilization of its integration advantages depends on AC '97 2.3 support in the target platform.
AD1986JSTZ-REEL Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Analog Devices Inc.
- Series:
- SoundMAX®
- Package/Case:
- 48-LQFP
- Packaging:
- Bulk
- Product Status:
- Obsolete
- Type:
- Audio Codec '97, HD
- Data Interface:
- Serial
- Resolution (Bits):
- 20 b
- Number of ADCs / DACs:
- 2 / 6
- Sigma Delta:
- No
- S/N Ratio, ADCs / DACs (db) Typ:
- -
- Dynamic Range, ADCs / DACs (db) Typ:
- 85 / 91
- Voltage - Supply, Analog:
- 4.5V ~ 5.5V
- Voltage - Supply, Digital:
- 2.97V ~ 3.63V
- Operating Temperature:
- 0°C ~ 70°C
- Grade:
- -
- Qualification:
- -
- Mounting Type:
- Surface Mount
- Supplier Device Package:
- 48-LQFP (7x7)
AD1986JSTZ-REEL FAQ
1.How can I place an order for AD1986JSTZ-REEL through Aetrix?
Please submit a Request for Quotation (RFQ) for AD1986JSTZ-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 AD1986JSTZ-REEL reliable?
The price and inventory of AD1986JSTZ-REEL are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for AD1986JSTZ-REEL is usually 5 days.
3.What payment methods are accepted for AD1986JSTZ-REEL?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for AD1986JSTZ-REEL transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for AD1986JSTZ-REEL?
AD1986JSTZ-REEL orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your AD1986JSTZ-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 AD1986JSTZ-REEL?
For technical support, including AD1986JSTZ-REEL datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your AD1986JSTZ-REEL requirements.
6.How does Aetrix verify that AD1986JSTZ-REEL is sourced from the original manufacturer or authorized distributors?
All AD1986JSTZ-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 AD1986JSTZ-REEL meets industry standards.
7.What is the process for return or replacement of AD1986JSTZ-REEL?
All AD1986JSTZ-REEL units undergo pre-shipment inspection (PSI). If there is an issue with AD1986JSTZ-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 AD1986JSTZ-REEL part is unused and in its original packaging.
Return procedure for AD1986JSTZ-REEL:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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