AD1866RZ

Overview

The AD1866RZ is a dual 16-bit audio digital-to-analog converter (DAC) from Analog Devices, housed in a 16-pin SOIC package. It operates on a single +5 V supply with typical power dissipation of 50 mW. Key electrical specifications include a total harmonic distortion plus noise (THD+N) of 0.005%, a signal-to-noise ratio of 95 dB, and channel separation of 115 dB at 1 kHz. The device features a serial interface compatible with TTL and +5 V CMOS logic, supporting clock rates up to 13.5 MHz for oversampling ratios of 2x, 4x, 8x, or 16x. It includes integrated output amplifiers capable of ±1 V swing into loads up to ±1 mA.

Feature Summary

• Dual 16-bit voltage output DACs with laser-trimmed thin-film resistors for low distortion.
• Single +5 V supply operation with low power consumption of approximately 50 mW.
• Integrated high-performance output amplifiers providing fast settling and high slew rate.
• Versatile serial digital interface compatible with all major digital filter chips.

Applications

• Multimedia workstations
• PC audio add-in boards
• Portable CD and DAT players
• Automotive CD and DAT players
• Noise cancellation systems

Procurement Notes

Verify the specific suffix 'RZ' against the manufacturer's ordering guide to confirm the SOIC-16 package option. Confirm RoHS compliance status as datasheet versions may vary. Check for end-of-life status or obsolescence notices directly from Analog Devices, as this component series may be discontinued.

Selection Notes

Select the AD1866RZ when a single-supply, low-power stereo DAC is required for portable or automotive audio applications. Ensure the system design accommodates the separate analog (VS) and digital (VL) supply pins and provides adequate decoupling capacitors (0.1 μF) near the package pins. Verify that the host microcontroller can drive the serial data lines within the specified timing constraints.

Part Context

The AD1866RZ belongs to the AD1866 family of audio DACs, which also includes the AD1866N (Plastic DIP) and AD1866R-REEL (SOIC tape and reel). The 'R' designation indicates the SOIC package form factor, while 'Z' typically denotes lead-free/RoHS compliant variants in Analog Devices nomenclature, though verification against the current ordering guide is recommended.

Replacement Considerations

Publicly confirmed substitute part numbers are not available in the provided documentation. Designers should consult Analog Devices for current alternatives or verify pin-compatible upgrades such as the AD1868 if higher resolution is required.