Overview
The AD1938YSTZRL is a high-performance, single-chip codec produced by Analog Devices Inc. This component integrates four analog-to-digital converters (ADCs) and eight digital-to-analog converters (DACs), utilizing Analog Devices' patented multibit sigma-delta (Σ-Δ) architecture. The AD1938 operates from a 3.3 V single supply and is designed for low Electromagnetic Interference (EMI). It features a Phase-Locked Loop (PLL) that can derive the master clock from an LR clock or an external crystal, eliminating the need for a separate high-frequency master clock. The device is available in a 48-lead LQFP package and includes an SPI port for microcontroller control over various parameters such as volume and mute functions.
Key Specifications
| Parameter | Value | Unit |
|---|---|---|
| Number of ADCs/DACs | 4 ADCs / 8 DACs | - |
| Sample Rates | 8 kHz to 192 kHz | - |
| Resolution | 24 bits | - |
| DAC Dynamic Range and SNR | 108 dB | - |
| ADC Dynamic Range and SNR | 107 dB | - |
| THD + N | −94 dB | - |
| Supply Voltage | 3.3 V | V |
| Package Type | 48-lead LQFP (7mm x 7mm) | - |
| Operating Temperature Range | −40°C to +125°C | °C |
Key Features
- Low EMI design using on-board PLL and continuous time architectures.
- Log volume control with autoramp function and software-controllable clickless mute.
- Support for right-justified, left-justified, I2S-justified, and TDM modes.
- Master and slave modes up to 16-channel input/output.
- Tolerance for 5 V logic inputs.
- SPI controllable for flexibility.
- Software power-down capability.
Applications
- Automotive audio systems.
- Home Theater Systems.
- Set-top boxes.
- Digital audio effects processors.
Q & A
- What is the AD1938YSTZRL?
The AD1938YSTZRL is a high-performance, single-chip codec that integrates four ADCs and eight DACs, designed for low EMI and operating from a 3.3 V single supply.
- What are the key specifications of the AD1938YSTZRL?
The device supports 24-bit resolution, sample rates from 8 kHz to 192 kHz, and features a dynamic range and SNR of 108 dB for DACs and 107 dB for ADCs.
- What package type is the AD1938YSTZRL available in?
The AD1938YSTZRL is available in a 48-lead LQFP package (7mm x 7mm).
- What are the operating supply voltages for the AD1938YSTZRL?
The device operates from a 3.3 V digital and analog supply.
- What are the main applications of the AD1938YSTZRL?
The main applications include automotive audio systems, home theater systems, set-top boxes, and digital audio effects processors.
- Does the AD1938YSTZRL support different clock modes?
Yes, it supports master and slave modes and can derive the master clock from an LR clock or an external crystal using the on-board PLL.
- How does the AD1938YSTZRL minimize EMI?
The device is designed with low EMI in mind, using continuous time architectures and an on-board PLL to minimize emissions.
- What control interface does the AD1938YSTZRL use?
The device includes an SPI port for microcontroller control over various parameters.
- Does the AD1938YSTZRL support software power-down?
Yes, the device supports software power-down capability.
- What is the operating temperature range of the AD1938YSTZRL?
The operating temperature range is from −40°C to +125°C.
