AD1938 is a high performance single-chip codec that provides four analog-to-digital audio channels and eight digital-to-analog audio channels, supports 192kHz sampling rate, supports 3.3V single-supply power supply, and an internal PLL clock generator. It supports a variety of interface modes and can be applied to automotive audio systems, home theater systems, set-top boxes and other scenarios.
The AD1938 is a high‑performance single‑chip audio codec that provides four analog‑to‑digital converters and eight digital‑to‑analog converters in a 48‑lead LOFP package. It operates from a 3.3 V supply and includes an on‑board PLL for master‑clock generation, supporting sample rates from 8 kHz to 192 kHz.
Key features include low EMI design, 108 dB DAC and 107 dB ADC dynamic range, software‑controllable volume with click‑less mute, SPI‑based control, and qualification for automotive applications. Typical applications are automotive audio systems, home theater, set‑top boxes, and digital audio effects processors.
| Supply voltages (AVDD, DVDD) | 3.3 V |
|---|---|
| ADC Resolution | 24 Bits |
| ADC Dynamic Range | 98‑102 dB |
| Volume Control Range | 95 dB |
| Power‑Down Current (48 kHz‑192 kHz) | 2.0 mA |
The AD1938 operates from 3.3 V analog and digital supplies (AVDD and DVDD).
All ADCs in the AD1938 have a 24‑bit resolution.
The codec provides a volume control range of 95 dB.
Yes, the AD1938 is qualified for automotive applications.