AD1854 is an audio decoder chip from Analog Devices. It supports 16-/18-/20-/24-bit data, supports 24 bits and 96kHz sampling rate, and has a multi-bit Sigma-Delta modulator and differential output. The dynamic range is 113dB, the signal-to-noise ratio is 112dB, and the THD+N is -101dB.
The AD1854 is a high‑performance, single‑chip stereo audio DAC from Analog Devices. It delivers up to 113 dB dynamic range, 20‑bit resolution, and supports 16‑/18‑/20‑/24‑bit data formats with sample rates up to 96 kHz. The device includes a multibit sigma‑delta modulator, on‑chip volume control with 1024 steps, and both hardware and software mute functions.
The DAC operates from a single 5 V supply, is packaged in a 28‑lead SSOP, and is specified for temperatures from 0 °C to 70 °C. It provides differential outputs, a flexible serial data port, and optional digital de‑emphasis. Detailed pin descriptions, timing diagrams, and typical performance graphs are included.
| Resolution | 20 Bits |
|---|---|
| Signal‑to‑Noise Ratio | 105‑112 dB (20 Hz‑20 kHz) |
| Supply Voltage | 5.0 V |
| Power Consumption (both supplies) | 250 mW |
| Differential Output Range | 5.6 V p‑p |
| Input Clock | 12.288 MHz (256 × Fs mode) |
| Temperature Range (operation) | 0 °C to 70 °C |
| Package | 28‑Lead Shrink Small Outline (SSOP) |
The AD1854 operates from a 5.0 V supply.
The device provides 1024 discrete volume steps.
The AD1854 supports sample rates up to 96 kHz.
Mute can be achieved by asserting the MUTE pin high or by setting the mute bit in the serial control register.