My Inquiry
My Account
Analog Devices Inc. AD1886JST
- Part No.:
- AD1886JST
- Manufacturer:
- Analog Devices Inc.
- Category:
- CODECS
- Package:
- 48-LQFP
- Datasheet:
-
AD1886JST.pdf
- Description:
- AC 97 SOUNDMAX CODEC
- Quantity:
- Payment:
- Shipping:
Inventory:1,191
Please send an inquiry. Send us your inquiry, and we will respond immediately.
Product details
Overview
AD1886JST from Analog Devices is a 16-bit stereo full-duplex AC'97 2.2-compliant audio codec IC designed for PC motherboard and embedded audio subsystems. It integrates dual 16-bit ADCs and DACs, a stereo headphone amplifier (32 Ω load), SPDIF output, and Phat™ 3D stereo enhancement. Key confirmed parameters include 90 dB dynamic range, 48 kHz max sample rate, 24.576 MHz crystal input, and 48-lead LQFP package - deployed in desktop audio controllers requiring AC Link interface compliance.
For engineers reviewing the AD1886JST datasheet, AD1886JST pinout, AD1886JST application, or AD1886JST equivalent, this page delivers verified functional role, AC'97 timing alignment, analog I/O channel mapping, power-down state control (PR0–PR6), and SPDIF symbol rate support at 32/44.1/48 kHz - critical for legacy PC audio design, BIOS-level audio initialization, and low-power mixer mode implementation.
Technical Context
The AD1886JST implements a dedicated AC'97 2.2-compliant digital audio interface with BIT_CLK (12.288 MHz), SYNC (48 kHz frame sync), SDATA_IN/SDATA_OUT serial streams, and hardware RESET. Its analog front-end includes two programmable-gain microphone inputs (0 dB or +20 dB), four stereo line-level inputs (LINE_IN, CD, VIDEO, AUX), and dual stereo outputs (LINE_OUT_L/R, HP_OUT_L/R) plus MONO_OUT.
Internally, it uses multibit converter architecture to achieve >90 dB SNR, features independent 6-bit master/headphone volume controls (1.5 dB/step), supports variable sample rates from 7.04 kHz to 48 kHz in 1 Hz increments, and provides jack sense (JS) and SPDIF output (pin 48) with software-enabled VREFOUT (2.25 V, 5 mA) for microphone biasing.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Resolution | 16-bit ADC/DAC - ensures compatibility with AC'97 2.2 full-duplex data slot format and standard PC audio driver stacks. |
| Dynamic Range | ≥90 dB (A-weighted) - meets high-fidelity desktop audio requirements; measured at –60 dB THD+N referenced to full scale. |
| Sample Rate Range | 7.04 kHz to 48 kHz in 1 Hz steps - enables precise clock synthesis for legacy DOS games, VoIP, and CD-quality playback without external PLL. |
| AC'97 Interface Clock | BIT_CLK = 12.288 MHz, SYNC = 48 kHz - defines fixed AC Link timing; no software-configurable clock divider required. |
| Analog Supplies | AVDD = 5.0 V ±5%, DVDD = 3.3 V ±10% - mandates split-rail PCB layout; analog/digital ground separation critical for SNR performance. |
| SPDIF Output | 20-bit resolution, 32/44.1/48 kHz symbol rates - provides consumer-grade digital audio passthrough independent of AC Link path. |
| Power Dissipation | 306 mW (typical, 5 V/3.3 V) - requires thermal pad consideration in LQFP-48 layout; θJA = 76.2°C/W per datasheet. |
Pinout & Package
AD1886JST is housed in a 48-lead Thin Quad Flatpack (LQFP), ST-48 package (JEDEC MO-220), with exposed thermal pad (not electrically connected). Pin 1 identifier located at top-left corner; pins numbered counterclockwise.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| XTL_IN (2) | Clock Input | 24.576 MHz fundamental-mode crystal or CMOS clock input; drives internal PLL for BIT_CLK generation. |
| BIT_CLK (6) | Digital Output/Input | 12.288 MHz AC Link bit clock; bidirectional for daisy-chained topologies; jitter ≤750 ps RMS. |
| SDATA_OUT (5) | Digital Output | AC Link upstream data stream (codec → controller); carries ADC samples and status bits in slot-3/4 format. |
| SDATA_IN (8) | Digital Input | AC Link downstream data stream (controller → codec); carries DAC samples, volume registers, and control commands. |
| HP_OUT_L (39), HP_OUT_R (41) | Analog Output | Direct-drive headphone outputs; each capable of 1 Vrms into 32 Ω; integrated 6-bit volume control (±88.5 dB range). |
| VREFOUT (28) | Analog Output | 2.25 V reference output with 5 mA drive; used for electret microphone bias; software-enabled via register 28h bit VRA. |
| JS (47) | Digital I/O | Jack sense input (default) or GPIO; detects plug insertion to auto-mute LINE_OUT/MONO_OUT; configurable via register 72h. |
| SPDIF (48) | Digital Output | 20-bit SPDIF serial output; supports consumer format; level-shiftable via external resistor network per Figure 23. |
Key Features
| Feature | Design Value |
|---|---|
| AC'97 2.2 Compliance | Fully compliant with AC'97 2.2 specification - guarantees interoperability with Intel 8x0-series southbridges and Windows audio stack without custom drivers. |
| Phat™ Stereo Enhancement | Hardware-accelerated 3D spatial processing using RX3D/CX3D external RC network - adds perceptual width without DSP overhead. |
| Mobile Low-Power Mixer Mode | Enables LPMIX + PR0–PR1 states to reduce analog supply current to 2.2 mA - extends battery life in portable docking stations. |
| Jack Sense Automation | JS pin triggers automatic routing between LINE_OUT and HP_OUT based on plug detection - eliminates OS-level polling latency. |
| Software-Enabled VREFOUT | VREFOUT disabled by default; activated via register 28h bit VRA - prevents unnecessary mic bias current draw during standby. |
Applications
| Desktop Motherboard Audio Subsystem | Legacy PC BIOS Audio Initialization |
|---|---|
|
Use Scenario: Integrated audio solution on ATX motherboards using Intel ICH chipsets, delivering line-out, headphone, and mic-in functionality without add-in cards. IC Role / Device Role / Timing Role: Primary AC'97 codec interfacing directly with southbridge AC Link; handles all analog I/O conversion, volume mixing, and SPDIF output. Use Value: Eliminates need for discrete op-amps and clock generators; supports simultaneous 16-bit stereo record/playback at 48 kHz with <90 dB SNR. |
Use Scenario: Audio initialization during POST and early-boot firmware execution, enabling beep codes and diagnostic tones before OS load. IC Role / Device Role / Timing Role: PC_BEEP input routed to LINE_OUT_L/R even in hardware reset state; driven by ISA-style beep generator. Use Value: Ensures audible POST feedback regardless of driver state; leverages dedicated PC Beep volume register (0Ah) with 3 dB/step attenuation. |
| Embedded Telephony Speakerphone Interface | CD-ROM Audio Passthrough System |
|
Use Scenario: Full-duplex speakerphone in kiosk or VoIP endpoint, using MONO_OUT for speaker output and PHONE_IN for handset/mic input. IC Role / Device Role / Timing Role: Dual-channel ADC/DAC with independent gain/attenuation controls per channel; supports echo cancellation preprocessing. Use Value: 90 dB SNR and –100 dB crosstalk enable clear voice capture; programmable phone volume (0Ch) allows adaptive gain matching. |
Use Scenario: Direct analog CD audio routing to LINE_OUT while maintaining ground-sense isolation for noise immunity. IC Role / Device Role / Timing Role: CD_L/CD_R inputs with dedicated CD_GND_REF pin; bypasses mixer path for lowest-latency, highest-fidelity playback. Use Value: Preserves original CD signal integrity; avoids digital resampling artifacts; supports 2.83 Vp-p full-scale input per spec. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar audio codec applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| AD1885JST | 16-bit AC'97 2.1 codec; lacks SPDIF output, Phat™ stereo, and jack sense; lower dynamic range (85 dB typical). | Targeted at cost-sensitive OEM boards without digital audio output or advanced 3D features. | Select AD1885JST only when SPDIF, JS, or >90 dB SNR are not required - reduces BOM cost but limits feature scalability. |
| WM9705G | Wolfson single-chip AC'97 codec; identical 16-bit resolution and 48 kHz support; different register map and pinout (64-QFP). | Used in industrial HMIs and medical devices where alternate vendor qualification is mandated. | WM9705G requires PCB redesign and driver adaptation; suitable only when Analog Devices second-sourcing is unavailable. |
Compared with AD1886JST, AD1885JST omits SPDIF and jack sense - limiting digital output and auto-switching capability - while WM9705G offers functionally equivalent audio performance but demands mechanical and firmware requalification due to non-pin-compatible packaging and register structure.
Availability
AD1886JST is available at Aetrix Electronics and suitable for desktop motherboard designs, legacy PC audio subsystems, and embedded telephony interfaces requiring stable component supply, long-lifecycle support, and AC'97 2.2 compliance.
Supply support for AD1886JST 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 semiconductor leader specializing in high-performance analog, mixed-signal, and digital signal processing technologies for precision instrumentation, communications, and industrial systems.
The AD1886JST belongs to Analog Devices' SoundMAX® AC'97 codec product line, engineered specifically for PC platform audio integration with emphasis on AC Link interoperability, low-noise analog front-end design, and BIOS-level boot-time functionality.
FAQ
What is the maximum sample rate supported by the AD1886JST?
The AD1886JST supports a maximum sample rate of 48 kHz with 1 Hz resolution, as confirmed in the "ENHANCED FEATURES" section and register maps (SR0/SR1 registers). This enables CD-quality playback and recording. The device achieves this using its internal PLL locked to the 24.576 MHz crystal input. Sample rates below 48 kHz - including 44.1 kHz and 32 kHz - are also fully supported and commonly used in multimedia applications. The AD1886JST does not support oversampled modes beyond 48 kHz.
Does the AD1886JST require an external crystal, and what frequency is needed?
Yes, the AD1886JST requires a 24.576 MHz fundamental-mode crystal connected between XTL_IN (pin 2) and XTL_OUT (pin 3). This frequency is mandatory to generate the AC'97-standard BIT_CLK (12.288 MHz) and SYNC (48 kHz) signals via internal division. Using any other frequency - such as 12.288 MHz or 49.152 MHz - will result in incorrect AC Link timing and communication failure. The crystal load capacitance must match the oscillator circuit's specification per the AD1886JST datasheet Figure 22.
How does the jack sense (JS) pin function on the AD1886JST?
The JS pin (pin 47) on the AD1886JST operates as a jack sense input by default, detecting plug insertion to automatically mute LINE_OUT and MONO_OUT while enabling HP_OUT. Its behavior is controlled by register 72h (Jack Sense/SPDIF Control), where bits JSM, JSMM, and JSLM configure sensing polarity and response. When configured as GPIO, JS can be toggled via software for general-purpose signaling. No external pull-up/down is required - internal biasing is provided, and the pin tolerates 3.3 V logic levels.
Can the AD1886JST operate with only a 3.3 V supply?
No, the AD1886JST requires dual supplies: 5.0 V ±5% on AVDD pins (25, 38, 43) and 3.3 V ±10% on DVDD pins (1, 9). The analog and digital sections are physically isolated; applying only 3.3 V to AVDD will prevent proper operation of ADCs, DACs, and headphone amplifiers. Power sequencing matters: AVDD must be stable before DVDD, and both must meet voltage tolerance specs under load. The datasheet specifies 48 mA analog and 20 mA digital supply currents at nominal conditions.
What is the purpose of the VREFOUT pin on the AD1886JST, and how is it enabled?
The VREFOUT pin (pin 28) on the AD1886JST delivers a regulated 2.25 V reference with up to 5 mA drive, intended for electret microphone biasing. It is disabled by default and must be enabled via bit VRA in register 28h (Ext'd Audio ID). Once enabled, VREFOUT remains active unless explicitly disabled or the device enters deep power-down (PR5–PR0 all set). Its output impedance is low enough to drive typical 2.2 kΩ mic bias networks without droop, and it tracks AVDD stability within ±100 mV over temperature.
AD1886JST Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Analog Devices Inc.
- Series:
- AD1886
- Package/Case:
- 48-LQFP
- Packaging:
- Bulk
- Product Status:
- Active
- Type:
- Audio, AC '97
- Data Interface:
- AC'97
- Resolution (Bits):
- 16 b
- Number of ADCs / DACs:
- 2 / 2
- Sigma Delta:
- Yes
- S/N Ratio, ADCs / DACs (db) Typ:
- -
- Dynamic Range, ADCs / DACs (db) Typ:
- 87 / 90
- Voltage - Supply, Analog:
- 4.75V ~ 5.25V
- Voltage - Supply, Digital:
- 3V ~ 3.6V
- Operating Temperature:
- 0°C ~ 70°C (TA)
- Grade:
- -
- Qualification:
- -
- Mounting Type:
- Surface Mount
- Supplier Device Package:
- 48-LQFP (7x7)
AD1886JST FAQ
1.How can I place an order for AD1886JST through Aetrix?
Please submit a Request for Quotation (RFQ) for AD1886JST 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 AD1886JST reliable?
The price and inventory of AD1886JST are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for AD1886JST is usually 5 days.
3.What payment methods are accepted for AD1886JST?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for AD1886JST transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for AD1886JST?
AD1886JST orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your AD1886JST 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 AD1886JST?
For technical support, including AD1886JST datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your AD1886JST requirements.
6.How does Aetrix verify that AD1886JST is sourced from the original manufacturer or authorized distributors?
All AD1886JST 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 AD1886JST meets industry standards.
7.What is the process for return or replacement of AD1886JST?
All AD1886JST units undergo pre-shipment inspection (PSI). If there is an issue with AD1886JST, 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 AD1886JST part is unused and in its original packaging.
Return procedure for AD1886JST:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
AD1886JST 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…
