This document is about the production data of WM8738 24 Bit Stereo ADC, which is a high performance stereo audio ADC designed for consumer applications. It has 90 dB SNR ('A' weighted @ 48kHz) audio performance, supports 3.0-5.5V analog power operation and 3.0-3.6V digital power operation. The device supports 32kHz-96kHz ADC sampling frequency and 14-pin SOIC package.
The WM8738 is a high‑performance 24‑bit stereo audio analog‑to‑digital converter designed for consumer audio applications such as CD and MiniDisc recorders, DVD players, and general‑purpose audio conversion. It provides stereo line‑level inputs, a control input for two standard audio interface modes, and a selectable digital high‑pass filter to remove DC offsets.
Key features include a 90 dB A‑weighted signal‑to‑noise ratio, sampling frequencies from 32 kHz to 96 kHz, and operation from 3.0 V to 5.5 V supplies. The device is supplied in a 14‑pin SOIC package and includes detailed timing specifications for the digital audio interface.
| Signal‑to‑Noise Ratio | 90 dB A‑weighted @ 48 kHz |
|---|---|
| Digital Supply Voltage | 3.0 V – 3.6 V |
| Analogue Supply Voltage | 3.0 V – 5.5 V |
| ADC Sampling Frequency | 32 kHz – 96 kHz |
| Package Type | 14‑pin SOIC |
| Master Clock Frequency | 37 MHz |
| Operating Temperature Range | -25 °C – +85 °C |
| Digital Input Low Level | 0.8 V |
| Digital Input High Level | 2.0 V |
The WM8738 achieves a 90 dB A‑weighted signal‑to‑noise ratio at 48 kHz.
The digital supply should be 3.0 V to 3.6 V, and the analogue supply should be 3.0 V to 5.5 V.
The device is offered in a 14‑pin SOIC package.
The WM8738 can operate up to +85 °C.