AD1939: 4 ADC/8 DAC with PLL, 192 kHz, 24-Bit Codec

The AD193X family are high performance, single-chip CODECs that provide 4 ADCs with differential input and 8 DACs with either single-ended or differential output using ADI’s patented multibit sigma-delta architecture. An SPI(R) or I^2C(R) port is included, allowing a microcontroller to adjust volume and many other parameters. The AD193X family operates from 3.3 V digital and analog supplies. The AD193X is available in a 48-lead or 64-lead LQFP package.

The AD193X 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 master clock from L/R clock, the AD193X eliminates the need for a separate high frequency master clock. It can also be used with a suppressed bit clock. The D/A and A/D converters are designed using the latest ADI continuous time architectures to further minimize EMI. By using 3.3 V supplies, power consumption is minimized, further reducing emissions.

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.

产品应用领域 Applications

Automotive audio systems
Home theater systems
Set-top boxes
Digital audio effects processors
汽车音频系统
家庭影院系统
机顶盒
数字音频效果处理器

AD1939 特点

PLL generated (32-192 kHz) or direct master clock
Low EMI design
106 dB DAC/ 107 dB ADC Dynamic Range and SNR
-92 dB THD+N
Single 3.3 V Supply
Supports 24-bits and 8 kHz - 192 kHz sample rates
Tolerance for 5 V logic inputs
Stereo and TDM Modes up to 16 channel in/out
Differential ADC input
Single-ended DAC output for simple implementation
Log volume control with "auto-ramp" function and mute
I^2C Control Interface
PLL生成或直接主时钟
低EMI设计
DAC动态范围与SNR：108 dB；ADC动态范围与SNR：107 dB
THD + N：-94 dB
3.3 V单电源供电
5 V逻辑输入容限
支持24位音频以及8 kHz至192 kHz采样速率
欲了解更多特性,请参考数据手册

AD1939 功能框图

AD1939 芯片订购指南

产品型号	产品状态	封装	引脚	温度范围
AD1939YSTZ	量产	64 ld LQFP (10x10mm)	64	工业
AD1939YSTZRL	量产	64 ld LQFP (10x10mm)	64	工业