AD1939

PRODUCTION

4 ADC/8 DAC with PLL, 192 k H z , 24-Bit Codec

Analog Devices AD1939 Product Info

10 February 2026 6

Features

PLL generated or direct master clock
Low EMI design
112 dB DAC/107 dB ADC dynamic range and SNR
−94 dB THD + N

Differential ADC input
Single 3.3 V supply
Tolerance for 5 V logic inputs
See datasheet for additional features

Part details & applications

The AD1939 is a high performance, single-chip codec that provides four analog-to-digital converters (ADCs) with differential input, and eight digital-to-analog converters (DACs) with differential output using the Analog Devices, Inc. patented multibit sigma-delta (Σ-Δ) architecture. An SPI port is included, allowing a microcontroller to adjust volume and many other parameters. The AD1939 operates from 3.3 V digital and analog supplies. The AD1939 is available in a 64-lead (differential output) LQFP package.

The AD1939 is designed for low EMI. This consideration is apparent in both the system and circuit design architectures. By using the on-board PLL to derive the master clock from the LR clock or from an external crystal, the AD1939 eliminates the need for a separate high frequency master clock and can also be used with a suppressed bit clock. The DACs and ADCs are designed using the latest Analog Devices continuous time architectures to further minimize EMI. By using 3.3 V supplies, power consumption is minimized, further reducing emissions.

APPLICATIONS

Automotive audio systems
Home Theater Systems
Set-top boxes
Digital audio effects processors

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