AD1837A is an ADC, 8 DAC audio codec that supports 5V stereo audio system with a 3.3V tolerant digital interface. It supports sample rates up to 96kHz and word lengths of 16, 20, and 24 bits. The codec features multibit modulators for reduced idle tones and noise floor, data directed scrambling DACs for improved jitter performance, and single-ended outputs. It also includes on-chip volume controls, digital de-emphasis processing, and supports various clock modes. The codec supports flexible serial data port modes and TDM interface.
The AD1837A is a high‑performance single‑chip audio codec from Analog Devices featuring four stereo DACs (8 channels) and one stereo ADC. It includes on‑chip reference, independent volume controls, click‑less mute, and a flexible serial interface supporting I²S, left‑justified, right‑justified, and DSP modes. Key specifications include 24‑bit resolution for both ADC and DAC, dynamic range up to 108 dB (with A‑weighted filter), supply voltages of 4.5 V–5.5 V, and operation over an industrial temperature range of –40 °C to +85 °C. The device is offered in a 52‑lead MQFP package.
| ADC Resolution | 24 Bits |
|---|---|
| DAC Resolution | 24 Bits |
| Dynamic Range (no filter) | 103 dB |
| THD+N (48 kHz) | -95 dB |
| Supply Voltage (AVDD/DVDD) | 4.5 V – 5.5 V |
| Package | 52‑Lead MQFP (S‑52‑1) |
| Volume Control Step Size | 0.098 % |
The device operates from 4.5 V to 5.5 V for both AVDD and DVDD supplies.
It includes four stereo DACs, giving a total of eight DAC channels.
The part is offered in a 52‑lead MQFP (S‑52‑1) package.