AD1954 SigmaDSP™ 3-Channel, 26-Bit Signal Processing DAC is a 5V audio DAC system from Analog Devices that supports 3 audio channels and a maximum sample rate of 48kHz. The product features 7 biquad filter sections, 0ms to 6ms variable delay, stereo spreading algorithm, program RAM, parameter RAM, SPI port, safe upload mode, etc.
The AD1954 is a 26‑bit, three‑channel digital audio playback DAC with integrated DSP functions such as speaker equalization, compression, delay, and stereo expansion. It supports sample rates up to 48 kHz, offers differential outputs, and includes programmable parameters via an SPI interface.
The document includes a functional block diagram, detailed specifications (supply voltages, clock rates, output ranges, noise performance), absolute maximum ratings, ordering information, pin configurations, and timing diagrams for digital interfaces.
| Supply Voltage (AVpp, DVpp) | 5.0 V |
|---|---|
| Input Clock Frequency | 12.288 MHz |
| Input Sample Rate | 48 kHz |
| Word Width | 24 Bits |
| Load Capacitance | 2200 pF |
| Differential Output Range (Left/Right) | 2.74 Vp‑p |
| Differential Output Range (Subwoofer) | 2.77 Vp‑p |
| Total Harmonic Distortion + Noise (Stereo) | -0.5 dB |
| Interchannel Crosstalk | -120 dB |
| Gain Error (Left/Right Channel) | -5 % to +5 % |
| Mute Attenuation | -107 dB |
| Pass‑Band Ripple | +0.01 dB |
| Stop‑Band Attenuation | 70 dB |
The AD1954 operates from a 5.0 V supply for both analog and digital power pins.
The AD1954 uses a 12.288 MHz master clock input.
The left/right differential outputs swing ±2.74 V peak‑to‑peak.