The AD1937 is a high-performance, single-chip codec that provides four analog-to-digital converters and eight digital-to-analog converters. It features a PLL-generated clock or direct master clock, low EMI design, 112dB DAC/107dB ADC dynamic range and SNR, -96dB THD+N, single 3.3V supply, tolerance for 5V logic inputs, support for 24-bit and 8kHz to 192kHz sample rates, and more.
The AD1937 is a high‑performance, single‑chip audio codec from Analog Devices that integrates four differential ADCs and eight differential DACs. It operates from a single 3.3 V supply and offers low‑EMI design, PLL‑generated or external master clock, and software‑controllable volume and mute functions.
The document lists detailed electrical specifications, timing diagrams, digital filter characteristics, and recommended application circuits. It also includes absolute maximum ratings, power‑supply requirements, and reference voltage information for designers implementing the codec in audio equipment such as set‑top boxes and digital audio processors.
| Supply Voltage (AVDD, DVDD) | 3.3 V |
|---|---|
| ADC Resolution | 24 Bits |
| DAC Resolution | 24 Bits |
| ADC Dynamic Range | 107 dB |
| Full‑Scale Input Voltage (Differential) | 1.9 Vrms |
| Power Consumption (All Supplies) | 429 mW |
| Master Clock Frequency | 12.288 MHz |
The AD1937 operates from a 3.3 V supply for both analog and digital rails.
All ADCs in the AD1937 have a 24‑bit resolution.
The DACs achieve a dynamic range of 112 dB (with A‑weighted filter).
The internal PLL can generate a master clock of 12.288 MHz (48 kHz × 256).