The AD1895 is a 24-bit, high performance, single-chip, second generation asynchronous sample rate converter. It offers improved performance and additional features, including a THD + N range of –115 dB to –122 dB, 128 dB (A-Weighted) dynamic range, 192 kHz sampling frequencies, improved jitter rejection, and 1:8 upsampling and 7.75:1 downsampling ratios.
The AD1895 is a high‑performance 24‑bit asynchronous sample‑rate converter designed for audio applications such as home‑theater and automotive systems. It features automatic sample‑frequency detection, jitter attenuation, and a linear‑phase FIR filter, supporting input and output sample rates up to 192 kHz.
The device operates from a 3.3 V core supply and a 5 V I/O supply, is offered in a 28‑lead SSOP package, and provides multiple serial data formats, including left‑justified, right‑justified, and TDM daisy‑chain modes. Detailed specifications cover digital performance, timing, power consumption, and pin functions.
| Core supply voltage (VDD_CORE) | 3.3 V |
|---|---|
| I/O supply voltage (VDD_IO) | 5.0 V |
| Maximum sample rate | 192 kHz |
| Dynamic range (A‑Weighted) | 128 dB |
| THD+N (worst case) | -122 dB |
| Total active power dissipation at 192 kHz | 132 mW |
| Package | 28‑Lead SSOP (RS‑28) |
The AD1895 supports sample rates up to 192 kHz for both input and output.
The AD1895 provides a 128 dB A‑weighted dynamic range.