AD1955 is a high-performance multibit ½-DAC with SACD playback.
The AD1955 is a single‑chip, high‑performance stereo digital‑audio playback system. It combines a multibit sigma‑delta modulator, digital interpolation filters, and continuous‑time differential current output DACs, offering on‑chip clickless mute and volume control via an SPI‑compatible serial port. The device supports all DVD‑audio formats, including 24‑bit/192 kHz PCM and DSD playback, and is compatible with a wide range of external filters and clock sources.
Key features include a 5 V supply, 28‑lead SSOP package, differential output of 8.64 mA p‑p, 120 dB SNR (stereo), and extensive pin‑level control for mute, reset, and digital data. Detailed specifications cover analog performance, digital timing, absolute maximum ratings, and ordering options.
| Resolution | 24 Bits |
|---|---|
| Differential Output Range (Full Scale) | 8.64 mA p‑p |
It supports PCM sample rates from 32 kHz up to 192 kHz and DSD playback at 64× or 128× the base sampling frequency.
Assert the MUTE pin (pin 22) high to mute both stereo analog outputs.