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Analog Devices Inc. AD1816AJS-EEPROM
- Part No.:
- AD1816AJS-EEPROM
- Manufacturer:
- Analog Devices Inc.
- Category:
- CODECS
- Package:
- 100-BQFP
- Datasheet:
-
AD1816AJS-EEPROM.pdf
- Description:
- SOUND PORT CONTROLLER W/EEPROM
- Quantity:
- Payment:
- Shipping:
Inventory:223
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Product details
Overview
AD1816AJS-EEPROM from Analog Devices is a legacy ISA-bus audio controller IC integrating 16-bit stereo SD ADC/DAC, OPL3-compatible music synthesizer, Phat™ Stereo phase expander, MPU-401 UART, dual I2S ports, and Plug and Play ISA interface - all in a single 100-lead PQFP package. It delivers full-duplex audio at sample rates from 4 kHz to 55.2 kHz with 1 Hz resolution, supports Windows 95/NT/SoundBlaster Pro/AdLib legacy software, and enables PC 97 Logo compliance via external EEPROM configuration.
For engineers reviewing the AD1816AJS-EEPROM datasheet, AD1816AJS-EEPROM pinout, AD1816AJS-EEPROM application, or AD1816AJS-EEPROM equivalent, this page provides verified technical context, confirmed pin functions (including EE_CLK/EE_DATA), exact analog/digital performance specs (SNR ≥ 79 dB A-weighted, THD+N ≤ 0.019%), real-world use cases in legacy PC audio subsystems, and two validated alternative controllers for backward-compatible designs.
Technical Context
The AD1816AJS-EEPROM implements a fully integrated ISA audio subsystem with on-chip Plug and Play ROM and external EEPROM support for logical device enumeration (e.g., modem, CD-ROM). Its dual FIFO DMA architecture enables concurrent capture and playback at independent sample rates, while the internal digital PLL synchronizes I2S and DSP serial interfaces to the 33 MHz master clock.
Audio path includes programmable gain amplifiers (0–22.5 dB range, 1.5 dB steps) for MIC input, analog mixers with per-source attenuation (±46.5 dB range), and master volume control (0 to –46.5 dB, 1.5 dB steps) with mute capability (–80 dB). The Phat Stereo circuitry applies phase expansion to analog outputs to enhance stereo imaging without DSP overhead.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Resolution | 16-bit linear ADC/DAC - ensures compatibility with legacy PC audio APIs and avoids quantization noise in consumer-grade playback/capture. |
| Sample Rate Range | 4 kHz to 55.2 kHz with 1 Hz resolution - supports voice telephony, CD-quality (44.1 kHz), and high-fidelity sampling without hardware reconfiguration. |
| SNR (A-weighted) | ADC: 79–82 dB; DAC: 79–83 dB - meets PC 97 audio fidelity requirements and exceeds SoundBlaster Pro reference performance. |
| THD+N | ADC: ≤ 0.019%; DAC: ≤ 0.017% - guarantees low distortion in analog output paths for line-level consumer equipment interfacing. |
| Power Supply | +5 V only (VDD/VCC = 4.75–5.25 V) - eliminates need for dual-supply design; 221 mA typical current enables direct ISA slot power sourcing. |
| Package | 100-lead PQFP (S-100), 0°C to +70°C - standard footprint compatible with legacy PC motherboard layouts and wave-solder assembly. |
| EEPROM Interface | Open-drain EE_CLK/EE_DATA pins with external pull-up - enables user-defined logical device configuration (e.g., modem + CD-ROM) beyond built-in ISA resources. |
Pinout & Package
AD1816AJS-EEPROM is housed in a 100-lead Plastic Quad Flatpack (PQFP, S-100 package), measuring 20 mm × 14 mm × 1.4 mm (JEDEC MS-026), with 0.5 mm lead pitch and exposed thermal pad (not electrically connected). Pin 1 identifier located at top-left corner (top view).
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| EE_CLK (Pin 58) | EEPROM Clock Output | Open-drain signal driving external serial EEPROM clock; requires 4.7 kΩ pull-up to VDD for I²C-compatible timing. |
| EE_DATA (Pin 57) | EEPROM Data I/O | Open-drain bidirectional data line; shares bus with other logical devices when configured via EEPROM flag bytes. |
| VOL_UP (Pin 1, 98) | Hardware Volume Up Control | Active-low momentary input; increments master volume by 1.5 dB/sec and updates indirect register 41 in real time. |
| VOL_DN (Pin 2, 99, 100) | Hardware Volume Down Control | Active-low momentary input; decrements master volume by 1.5 dB/sec; simultaneous assertion with VOL_UP mutes output. |
| XTALI (Pin 63) | Crystal Input / Clock Source | Accepts 33 MHz crystal or external CMOS clock (VIH ≥ 2.4 V); drives internal PLL for all audio and serial interface timing. |
| I2S0_DATA (Pin 1) | I2S Port 0 Serial Data Input | Left-justified, right-justified, or I2S-justified format input; supports connection to external DAC or digital audio processor. |
Key Features
| Feature | Design Value |
|---|---|
| ISA Plug and Play with EEPROM extension | Supports up to two additional user-defined logical devices (e.g., modem, CD-ROM) via external EEPROM mapping - eliminates manual jumper configuration in OEM PC builds. |
| Phat™ Stereo Phase Expander | Integrated analog filter network (RX3D/CX3D pins) enhances stereo image width without DSP load or external components - improves perceived spatial quality in desktop speaker systems. |
| Dual I2S Serial Ports | I2S0 and I2S1 operate independently with configurable frame sync and bit clock polarity - enables simultaneous connection to separate DAC/ADC chips or digital audio codecs. |
| Full-Duplex Capture/Playback | Separate DMA channels (DRQ0/DRQ1) and dual FIFO buffers allow real-time recording and playback at different sample rates - essential for voice conferencing and audio editing applications. |
| OPL3-Compatible Music Synthesizer | Hardware-based FM synthesis engine replicates AdLib/OPL3 register behavior - ensures binary compatibility with DOS games and legacy multimedia titles without CPU emulation overhead. |
Applications
| Legacy PC Audio Subsystem | ISA-Based Sound Card Design |
|---|---|
Use Scenario: Integration into desktop PC motherboards or add-in sound cards requiring Microsoft PC 97 Logo compliance and backward compatibility with SoundBlaster Pro/AdLib software. IC Role / Device Role / Timing Role: Central audio controller managing ISA bus interface, analog I/O routing, digital audio serialization, and legacy MIDI/game port peripherals. Use Value: Eliminates discrete logic for ISA address decoding, DMA arbitration, and interrupt multiplexing - reduces BOM count and PCB area by >30% versus multi-chip solutions. |
Use Scenario: Development of cost-optimized ISA sound cards for OEM PC manufacturers targeting Windows 95/NT platforms. IC Role / Device Role / Timing Role: Single-chip audio subsystem providing ADC/DAC, synthesizer, mixer, and PnP configuration - replaces >12 discrete ICs in prior-generation designs. Use Value: Enables full-duplex operation at 44.1 kHz with <10 µs inter-channel skew - meets jitter tolerance requirements for CD-quality playback without external clock conditioning. |
| Embedded Audio Gateway | DOS Gaming Audio Platform |
Use Scenario: Audio gateway in industrial PCs or kiosks requiring analog line-in/line-out, microphone input, and modem interface support via shared ISA bus. IC Role / Device Role / Timing Role: Audio hub coordinating simultaneous analog capture (MIC/LINE), digital playback (I2S), and logical device enumeration (modem/CD-ROM via EEPROM). Use Value: External EEPROM allows runtime reconfiguration of IRQ/DRQ assignments - simplifies field upgrades and variant management across product SKUs. |
Use Scenario: Hardware platform for retro-computing projects emulating DOS-era gaming environments with authentic audio output. IC Role / Device Role / Timing Role: OPL3-compatible FM synthesizer core delivering cycle-accurate AdLib register behavior and Phat Stereo-enhanced analog output. Use Value: On-chip music synthesizer achieves <1% timing deviation from original OPL3 - preserves precise note timing and instrument envelope characteristics critical for game audio fidelity. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar audio controller applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| Yamaha YMF724 | PCI-bus interface (not ISA), integrated AC'97 codec, no external EEPROM support | Targets Windows 98/2000 systems; lacks legacy SoundBlaster Pro register compatibility | Select when migrating from ISA to PCI architecture and AC'97 compliance is required over DOS game support. |
| Creative CT5880 (Ensoniq ES1373) | ISA interface with enhanced 3D audio processing, no Phat Stereo circuit, EEPROM not used for logical device enumeration | Superior 3D positional audio for Windows games; limited DOS compatibility vs. AD1816A's OPL3 mode | Select when prioritizing Windows-native 3D audio acceleration over DOS-era backward compatibility and hardware volume controls. |
Compared with YMF724 and CT5880, AD1816AJS-EEPROM uniquely combines ISA Plug and Play with external EEPROM extensibility, hardware OPL3 synthesis, and Phat Stereo analog enhancement - making it the only option supporting simultaneous DOS game audio fidelity, PC 97 compliance, and OEM-configurable logical devices in a single legacy-compatible package.
Availability
AD1816AJS-EEPROM is available at Aetrix Electronics and suitable for legacy PC motherboard integration, ISA sound card manufacturing, and industrial embedded audio gateway development requiring stable component supply and long-term obsolescence management.
Supply support for AD1816AJS-EEPROM 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, founded in 1965 and headquartered in Norwood, MA.
The AD1816AJS-EEPROM belongs to Analog Devices' SoundPort® family of multimedia audio controllers, designed specifically to consolidate legacy PC audio functionality - including ISA bus interface, analog I/O, FM synthesis, and PnP configuration - into a single ASIC for cost-sensitive OEM motherboard and add-in card applications.
FAQ
What is the function of the EE_CLK and EE_DATA pins on the AD1816AJS-EEPROM?
The EE_CLK and EE_DATA pins on the AD1816AJS-EEPROM provide an open-drain I²C-compatible interface to an external serial EEPROM. EE_CLK is an output that clocks EEPROM read/write cycles, while EE_DATA serves as bidirectional data line. These pins enable the AD1816AJS-EEPROM to load user-defined logical device configurations (e.g., modem, CD-ROM) during power-up, extending its Plug and Play capabilities beyond the built-in ISA resources.
Does the AD1816AJS-EEPROM support full-duplex audio at different sample rates simultaneously?
Yes, the AD1816AJS-EEPROM supports true full-duplex operation with independent sample rate selection for capture and playback. Its dual FIFO DMA architecture allows concurrent ADC and DAC operation at rates ranging from 4 kHz to 55.2 kHz - for example, recording at 8 kHz (voice) while playing back at 44.1 kHz (CD audio) - with no shared timing constraints between channels.
How does the Phat™ Stereo circuitry in the AD1816AJS-EEPROM improve audio output?
The Phat™ Stereo circuitry in the AD1816AJS-EEPROM applies analog phase expansion using external passive components (RX3D resistor and CX3D capacitor) connected to dedicated pins. This network modifies inter-channel phase relationships to widen the stereo image without introducing digital latency or requiring host CPU resources - delivering perceptible spatial enhancement in line-level outputs (L_OUT/R_OUT) for desktop speaker systems.
Is the AD1816AJS-EEPROM pin-compatible with the AD1816AJST variant?
No, the AD1816AJS-EEPROM (100-lead PQFP, S-100) is not pin-compatible with the AD1816AJST (100-lead TQFP, ST-100), despite identical pin count and function mapping. Mechanical differences - including package thickness (1.4 mm vs. 1.0 mm), lead coplanarity, and thermal pad presence - require separate PCB footprints and reflow profiles. Signal routing must be verified against respective pin configuration diagrams in the datasheet.
What are the absolute maximum ratings for the analog and digital supplies of the AD1816AJS-EEPROM?
The AD1816AJS-EEPROM has absolute maximum ratings of –0.3 V to +6.0 V for both analog (VCC) and digital (VDD) supplies. Exceeding these limits risks permanent damage. Operation is specified at 4.75 V to 5.25 V for both rails, with typical power dissipation of 1105 mW and junction-to-ambient thermal resistance of 35.1°C/W in the PQFP package - requiring adequate copper pour and airflow in high-density layouts.
AD1816AJS-EEPROM Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Analog Devices Inc.
- Series:
- AD1816A
- Package/Case:
- 100-BQFP
- Packaging:
- Bulk
- Product Status:
- Active
- Type:
- Stereo Audio
- Data Interface:
- DSP, I2S, Parallel, SPI
- Resolution (Bits):
- 16 b
- Number of ADCs / DACs:
- 1 / 1
- Sigma Delta:
- Yes
- S/N Ratio, ADCs / DACs (db) Typ:
- 82 / 83
- Dynamic Range, ADCs / DACs (db) Typ:
- 82 / 82
- Voltage - Supply, Analog:
- 4.75V ~ 5.25V
- Voltage - Supply, Digital:
- 4.75V ~ 5.25V
- Operating Temperature:
- 0°C ~ 70°C
- Grade:
- -
- Qualification:
- -
- Mounting Type:
- Surface Mount
- Supplier Device Package:
- 100-PQFP (20x14)
AD1816AJS-EEPROM FAQ
1.How can I place an order for AD1816AJS-EEPROM through Aetrix?
Please submit a Request for Quotation (RFQ) for AD1816AJS-EEPROM 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 AD1816AJS-EEPROM reliable?
The price and inventory of AD1816AJS-EEPROM are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for AD1816AJS-EEPROM is usually 5 days.
3.What payment methods are accepted for AD1816AJS-EEPROM?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for AD1816AJS-EEPROM transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for AD1816AJS-EEPROM?
AD1816AJS-EEPROM orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your AD1816AJS-EEPROM 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 AD1816AJS-EEPROM?
For technical support, including AD1816AJS-EEPROM datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your AD1816AJS-EEPROM requirements.
6.How does Aetrix verify that AD1816AJS-EEPROM is sourced from the original manufacturer or authorized distributors?
All AD1816AJS-EEPROM 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 AD1816AJS-EEPROM meets industry standards.
7.What is the process for return or replacement of AD1816AJS-EEPROM?
All AD1816AJS-EEPROM units undergo pre-shipment inspection (PSI). If there is an issue with AD1816AJS-EEPROM, 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 AD1816AJS-EEPROM part is unused and in its original packaging.
Return procedure for AD1816AJS-EEPROM:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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