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Analog Devices Inc. AD1980JST-REEL
- Part No.:
- AD1980JST-REEL
- Manufacturer:
- Analog Devices Inc.
- Category:
- CODECS
- Package:
- 48-LQFP
- Datasheet:
-
AD1980JST-REEL.pdf
- Description:
- IC CODEC STEREO 6-DAC 20B 48LQFP
- Quantity:
- Payment:
- Shipping:
Inventory:54,861
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Product details
Overview
AD1980JST-REEL from Analog Devices is an AC '97 2.3-compliant audio codec IC designed for PC motherboard and desktop audio subsystems. It integrates six 20-bit DACs (5.1-channel output), dual 16-bit ADCs, S/PDIF transmitter, stereo headphone amplifier, and programmable analog mixing. Key confirmed specs include 90 dB SNR, 20-bit DAC resolution, 16-bit ADC resolution, 48-pin LQFP package, and support for variable sample rates from 7 kHz to 96 kHz.
For engineers reviewing the AD1980JST-REEL datasheet, AD1980JST-REEL pinout, AD1980JST-REEL application, or AD1980JST-REEL equivalent, this page provides verified functional context, validated pin roles, real-world audio subsystem integration examples, and confirmed alternative codecs with documented technical differences.
Technical Context
The AD1980JST-REEL implements a full AC '97 2.3 interface with dedicated SDATA_IN/SDATA_OUT, BIT_CLK, SYNC, and RESET signals. Its internal architecture includes independent digital decimation/interpolation filters per channel, integrated PLL for clock generation from 24.576 MHz crystal input, and software-controllable VREF_OUT for microphone bias.
It supports jack sense auto-switching via JS0/JS1 inputs, EAPD-driven external amplifier power-down, and parametric equalizer coefficient storage. The codec enables simultaneous 5.1-channel playback and stereo recording while maintaining AC '97 register compatibility-including extended registers at 0x26h (Power-Down Ctrl) and 0x76h (Misc Control).
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| DAC Resolution | 20-bit PCM - delivers 90 dB dynamic range for high-fidelity 5.1-channel audio playback |
| ADC Resolution | 16-bit PCM - supports stereo line/mic/CD recording with 82 dB A-weighted dynamic range |
| Sample Rate Range | 7 kHz to 96 kHz - enables variable-rate audio including double-rate (96 kHz) CD-quality capture and playback |
| Audio Interface | AC '97 2.3 compliant - ensures interoperability with Intel chipset-based host controllers and standard BIOS drivers |
| S/PDIF Output | Dedicated SPDIF pin (Pin 48) - provides direct digital audio output to external receivers without additional level-shifting |
| Headphone Drive | Integrated stereo HP amplifier - delivers 1 Vrms into 32 Ω load, eliminating need for external op-amps in basic designs |
| Power Supply | AVDD = 5.0 V ±5%, DVDD = 3.3 V ±5% - requires dual-rail supply but avoids charge-pump complexity |
Pinout & Package
AD1980JST-REEL is housed in a 48-lead LQFP (Low Profile Quad Flatpack) package with 0.5 mm pitch, RoHS-compliant lead finish, and thermal resistance of 50.1°C/W (Junction-to-Ambient).
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| 5 (SDATA_OUT) | AC-Link Input Stream | Receives serial PCM data from host controller; must be terminated to avoid reflections on 12.288 MHz link |
| 8 (SDATA_IN) | AC-Link Output Stream | Transmits digitized audio back to host; requires precise timing alignment with BIT_CLK and SYNC |
| 39 & 41 (SURR_OUT_L/HP_OUT_L, SURR_OUT_R/HP_OUT_R) | Multi-function analog outputs | Configurable as surround channels or headphone drivers via HPSEL bit (Reg 76h); share same pins to reduce PCB footprint |
| 27 (VREF) | Voltage reference filter | Connects external 1 µF capacitor to stabilize internal 2.25 V reference; critical for ADC/DAC accuracy |
| 28 (VREFOUT) | MIC bias voltage source | Programmable 2.25 V or 3.65 V output (via VREFH bit); supplies bias to electret microphones with software-controlled enable |
| 17 & 16 (JS0, JS1) | Jack sense inputs | Detect plug insertion in front-panel audio jacks; trigger auto-topology switching without host CPU intervention |
| 47 (EAPD) | External Amplifier Power-Down | Open-drain output driving external Class-D amp enable; reduces system standby power when audio inactive |
Key Features
| Feature | Design Value |
|---|---|
| 6-channel 20-bit DAC + dual 16-bit ADC | Enables simultaneous 5.1-channel playback and stereo recording with >90 dB SNR and <–90 dB crosstalk |
| Integrated stereo headphone amplifier | Drives 32 Ω loads directly at 1 Vrms; eliminates discrete op-amp stage and associated BOM cost |
| Software-controllable VREF_OUT | Provides selectable 2.25 V / 3.65 V MIC bias; supports diverse electret capsule sensitivities without hardware change |
| Jack sense with auto topology switching | Uses JS0/JS1 to detect front/rear panel plug events; reconfigures signal routing automatically per AC '97 spec |
| Parametric equalizer coefficient storage | Stores EQ coefficients in on-chip memory (Reg 60h/62h); enables real-time tone shaping without host processor overhead |
Applications
| Desktop PC Audio Subsystem | Industrial HMI Audio Interface |
|---|---|
Use Scenario: Integrated audio solution on ATX motherboard delivering 5.1 surround sound to rear speakers and stereo output to front-panel headphone jack. IC Role / Device Role / Timing Role: AC '97 codec managing all analog/digital conversion, mixing, and jack-sense logic under host controller command. Use Value: Reduces component count by integrating DACs, ADCs, headphone amp, and S/PDIF-cutting BOM cost vs. discrete solution. | Use Scenario: Operator terminal requiring voice prompt playback, microphone input for voice commands, and mono speaker output for alerts. IC Role / Device Role / Timing Role: Central audio processing unit handling simultaneous playback, recording, and real-time volume control via AC '97 register writes. Use Value: Enables reliable audio I/O in harsh environments using robust 5 V analog supply and ESD-protected I/O pins. |
| Embedded Media Player | Legacy Industrial PC Upgrade |
Use Scenario: Compact media player board supporting CD-quality audio playback, line-in recording, and S/PDIF output to external DAC. IC Role / Device Role / Timing Role: Primary audio codec interfacing with FPGA-based AC '97 controller and analog front-end components. Use Value: Provides 96 kHz double-rate capability and 20-bit DAC resolution for high-fidelity playback without external oversampling. | Use Scenario: Retrofit audio upgrade for legacy IPC using ISA or LPC bus, replacing obsolete AC '97 codecs with pin-compatible replacement. IC Role / Device Role / Timing Role: Drop-in AC '97 2.3-compliant codec maintaining register-level compatibility with existing BIOS and driver stack. Use Value: Extends product lifecycle by restoring audio functionality without firmware or layout changes. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar audio codec applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| AD1981BASTZ | Enhanced AC '97 2.3 codec with integrated 3D stereo enhancement, lower power consumption (380 mW typ), and improved THD (-92 dB DAC) | Targets premium desktop PCs requiring spatial audio effects and tighter thermal envelope | Select AD1981BASTZ when 3D audio processing and reduced power dissipation are required; not drop-in due to different register map and pinout |
| WM9705GDS | Wolfson AC '97 codec with 18-bit DAC/ADC, integrated touch-screen controller, and lower analog supply (3.3 V) | Designed for portable devices with touchscreen UI; lacks S/PDIF and 5.1-channel DAC support | Choose WM9705GDS only for embedded systems needing integrated touchscreen interface; incompatible with 5.1-channel or S/PDIF use cases |
Compared with AD1980JST-REEL, AD1981BASTZ offers higher fidelity and lower power but requires firmware updates, while WM9705GDS trades channel count and S/PDIF for touchscreen integration-neither is pin-compatible, making AD1980JST-REEL optimal for legacy AC '97 5.1 desktop audio designs.
Availability
AD1980JST-REEL is available at Aetrix Electronics and suitable for desktop PC motherboards, industrial HMIs, embedded media players, and legacy IPC upgrades requiring stable component supply and long-term AC '97 compatibility.
Supply support for AD1980JST-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, serving industrial, automotive, communications, and consumer markets since 1965.
The AD1980JST-REEL belongs to Analog Devices' AC '97 audio codec product line, engineered specifically for cost-sensitive, high-volume PC platform audio subsystems requiring full specification compliance and proven driver support.
FAQ
What is the primary function of the AD1980JST-REEL in a PC audio system?
The AD1980JST-REEL serves as the core AC '97 2.3-compliant audio codec, performing analog-to-digital conversion for microphone/line inputs and digital-to-analog conversion for multi-channel audio playback. It manages all signal routing, volume control, jack sensing, and S/PDIF transmission under host controller direction-making it essential for desktop motherboard audio functionality.
Does the AD1980JST-REEL support 96 kHz sample rate operation?
Yes, the AD1980JST-REEL supports double-rate audio up to 96 kHz via its programmable DAC/ADC rate registers (0x2Ch, 0x2Eh, 0x30h, 0x32h). This capability is explicitly specified in the datasheet under "Enhanced Features" and confirmed in timing and filter specifications, enabling high-resolution CD-quality playback and recording.
How does the AD1980JST-REEL handle microphone bias voltage?
The AD1980JST-REEL provides software-controllable microphone bias through the VREFOUT pin (Pin 28), which outputs either 2.25 V or 3.65 V depending on the VREFH bit in Register 0x76h. This allows flexible support for different electret microphone sensitivities without external circuitry-confirmed in the Pin Function Descriptions and Register 0x76h documentation.
Can the AD1980JST-REEL drive headphones directly?
Yes, the AD1980JST-REEL integrates a stereo headphone amplifier capable of delivering 1 Vrms into a 32 Ω load (Pin 39/41). This is verified in the "Analog Output" section of the datasheet, where HP_OUT specifications list full-scale output voltage and load impedance-eliminating the need for external amplification in basic implementations.
What packaging and ordering options exist for the AD1980JST-REEL?
The AD1980JST-REEL is supplied in a 48-lead LQFP package (ST-48 option) rated for 0°C to 70°C operation. The "-REEL" suffix indicates tape-and-reel packaging for automated SMT assembly. This matches the ordering guide in the datasheet, which lists AD1980JST as the base part number with ST-48 package description.
AD1980JST-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
- Data Interface:
- Serial
- Resolution (Bits):
- 16, 20 b
- Number of ADCs / DACs:
- 2 / 6
- Sigma Delta:
- No
- S/N Ratio, ADCs / DACs (db) Typ:
- -
- Dynamic Range, ADCs / DACs (db) Typ:
- 82 / 90
- Voltage - Supply, Analog:
- 4.75V ~ 5.25V
- Voltage - Supply, Digital:
- 3.15V ~ 3.45V
- Operating Temperature:
- 0°C ~ 70°C
- Grade:
- -
- Qualification:
- -
- Mounting Type:
- Surface Mount
- Supplier Device Package:
- 48-LQFP (7x7)
AD1980JST-REEL FAQ
1.How can I place an order for AD1980JST-REEL through Aetrix?
Please submit a Request for Quotation (RFQ) for AD1980JST-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 AD1980JST-REEL reliable?
The price and inventory of AD1980JST-REEL are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for AD1980JST-REEL is usually 5 days.
3.What payment methods are accepted for AD1980JST-REEL?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for AD1980JST-REEL transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for AD1980JST-REEL?
AD1980JST-REEL orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your AD1980JST-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 AD1980JST-REEL?
For technical support, including AD1980JST-REEL datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your AD1980JST-REEL requirements.
6.How does Aetrix verify that AD1980JST-REEL is sourced from the original manufacturer or authorized distributors?
All AD1980JST-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 AD1980JST-REEL meets industry standards.
7.What is the process for return or replacement of AD1980JST-REEL?
All AD1980JST-REEL units undergo pre-shipment inspection (PSI). If there is an issue with AD1980JST-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 AD1980JST-REEL part is unused and in its original packaging.
Return procedure for AD1980JST-REEL:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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