The AD1893 SamplePort is a fully digital, stereo Asynchronous Sample Rate Converter (ASRC) that solves sample rate interfacing and compatibility problems. The AD1893 has low cost, low power, and automatic sample frequency detection.
The AD1893 SamplePort is a fully digital, stereo asynchronous sample‑rate converter (ASRC) designed for low‑cost, low‑power 16‑bit audio applications. It automatically senses input and output sample frequencies ranging from 8 kHz to 56 kHz, supports dynamic ratio conversion (≈1:2 to 2:1), and provides up to 96 dB dynamic range with –96 dB THD+N.
The device is offered in a 28‑lead plastic DIP (AD1893JN) and a 44‑lead LQFP (AD1893JST). The datasheet includes detailed electrical specifications, pin configurations, digital filter characteristics, power‑down mode, and mechanical dimensions.
| Dynamic Range | 96 dB |
|---|---|
| Supply Voltage | +3.0 V |
| Operational Current (Vpp = +5 V) | 30‑40 mA |
| Power‑Down Current (Vpp = +3 V) | 0.5‑1.0 mA |
| Operational Temperature Range | -40 °C to +85 °C |
| Passband Ripple | 0.01 dB |
| Stopband Attenuation | 110 dB |
| Group Delay (LR_I = 50 kHz) | 700‑3000 ps |
The AD1893 is offered in a 28‑lead plastic DIP (AD1893JN) and a 44‑lead LQFP (AD1893JST).
Typical power‑down current is about 0.5 mA (minimum 0.5 mA, maximum 1.0 mA).
The group delay is approximately 700 ps (typical) and can be up to 3000 ps.