AD1816AJS-EEPROM

Overview

The AD1816AJS-EEPROM is an obsolete 100-lead PQFP stereo audio codec manufactured by Analog Devices. It integrates a Plug and Play ISA controller, OPL3 synthesizer, and dual 16-bit ADC/DACs. The device operates from a single +5 V supply with 4.75 V to 5.25 V range. Key specifications include 82 dB SNR for the ADC and 83 dB for the DAC at 48 kHz sampling. It supports full-duplex capture and playback with sample rates from 4 kHz to 55.2 kHz. The EEPROM suffix indicates onboard configuration storage for logical device decoding.

Feature Summary

• Supports legacy SoundBlaster Pro and AdLib compatibility alongside Microsoft PC 97 requirements.
• Integrates an internal OPL3 compatible music synthesizer and Phat Stereo phase expander circuitry.
• Includes an MPU-401 UART interface and an integrated enhanced digital game port.

Applications

• Multimedia personal computer audio subsystems
• ISA bus sound card designs requiring Plug and Play support
• Legacy gaming hardware utilizing MIDI and joystick interfaces

Procurement Notes

This component is officially classified as Obsolete by Analog Devices. Verify current lifecycle status on analog.com before design decisions. Historical datasheets are available for reference only. No active manufacturing or new production orders are supported. Consult EngineerZone for technical questions regarding deprecated products.

Selection Notes

Select this part only for maintaining existing legacy ISA-based systems. Modern designs should utilize contemporary audio codecs with PCI Express or USB interfaces. Ensure the target application requires specific SoundBlaster Pro emulation. Verify that the 100-lead PQFP package fits the mechanical constraints of the host board.

Part Context

The AD1816A is part of the SoundPort Controller family designed for 1990s multimedia PCs. The 'JS' designation specifies the 100-lead Plastic Quad Flatpack (PQFP) package with a commercial temperature range of 0°C to +70°C. The EEPROM variant allows the chip to decode additional external logical devices such as modems via its dedicated control pins.

Replacement Considerations

No direct functional equivalents exist due to the obsolete ISA interface. Consider modern audio CODECs with I2S/PCM interfaces and separate DSP controllers for new designs. Legacy compatibility layers may be required if replacing in existing hardware architectures.

FAQ

What is the function of the EE_CLK and EE_DATA pins?

These pins interface with an external EEPROM to store Plug and Play configuration data. This allows the AD1816A to decode up to two additional external user-defined logical devices, such as a modem or CD-ROM controller.

Does the AD1816A require bipolar power supplies?

No, the AD1816A operates from a single +5 V supply. It accommodates true bipolar input signals internally without requiring external negative voltage rails for the analog sections.

How many simultaneous sample rates does the device support?

The AD1816A supports up to six different sample rates simultaneously during full-duplex operation, allowing independent capture and playback speeds ranging from 4 kHz to 55.2 kHz.