AD1868N-J

Digital To Analog Converters Overview

The AD1868N-J is a dual 18-bit audio digital-to-analog converter (DAC) from Analog Devices, designed for single +5 V supply operation. It features a partially segmented architecture with laser-trimmed thin-film resistors to achieve low distortion and high linearity. The device integrates two voltage output DACs, each with an internal reference and output amplifier capable of ±1 V swings at ±1 mA load currents. Key electrical specifications include a typical THD+N of 0.004% and a signal-to-noise ratio of 95 dB. It operates with oversampling rates of 2×, 4×, 8×, or 16× the sampling frequency, supporting input clock rates up to 13.5 MHz.

Digital To Analog Converters Feature Summary

• Dual 18-bit serial input, voltage output DACs with integrated bias voltages eliminating false ground networks.
• Low power consumption of 50 mW (typical) with operation down to 3.5 V supply voltage.
• High performance metrics including 0.004% typical THD+N and 108 dB minimum channel separation.
• No external deglitcher or trimming circuitry required; TTL and +5 V CMOS compatible digital inputs.

Digital To Analog Converters Applications

• Portable Compact Disc Players
• Portable DAT Players and Recorders
• Automotive Compact Disc Players
• Multimedia Workstations

Digital To Analog Converters Procurement Notes

Verify the ordering suffix 'J' corresponds to the graded THD+N specification of 0.006% maximum as listed in the Ordering Guide. Confirm package type N-16 indicates a 16-pin plastic DIP. Ensure compatibility with single +5 V supply requirements and check temperature range specifications for the intended operating environment.

Digital To Analog Converters Selection Notes

Select the AD1868N-J when low power dissipation and single-supply operation are critical for portable or battery-powered designs. The device supports oversampling up to 16× Fs, making it suitable for high-fidelity audio reconstruction. Compare against the standard AD1868N if stricter THD+N limits below 0.006% are not required, as the 'J' grade offers tighter distortion specifications than the base model.

Digital To Analog Converters Part Context

The AD1868 belongs to Analog Devices' family of complete audio DACs that require minimal external components. It shares architectural similarities with the AD1864 and AD1865 but differs by using a single +5 V supply instead of dual supplies. The device utilizes ABCMOS fabrication technology and includes internal noise reduction capacitors and bias voltage references to simplify system design.

Digital To Analog Converters Replacement Considerations

Public confirmed substitute part numbers: AD1868N (standard grade), AD1868R-J (SOIC package variant). Pin-compatible alternatives within the same family include AD1864 and AD1865, though these require dual ±5 V supplies and have different pin counts or interface requirements.