Overview
The AD1981BJST-REEL is a versatile audio codec designed by Analog Devices Inc. This component is part of the AC '97 compatible family and is enhanced with several advanced features. Although it is no longer in production, it remains relevant for various legacy and specific application needs. The AD1981BJST-REEL supports multiple audio input and output channels, making it suitable for a range of audio processing tasks.
Key Specifications
| Parameter | Min | Typ | Max | Unit |
|---|---|---|---|---|
| Resolution (ADC) | 16 | - | - | Bits |
| Total Harmonic Distortion (THD) | -84 | - | - | dB |
| Dynamic Range (ADC) | 80 | 85 | - | dB |
| Power Supply Range - Analog (AVDD) | 4.65 | - | 5.25 | V |
| Power Supply Range - Digital (DVDD) | 3.15 | - | 3.45 | V |
| Analog Supply Current (AVDD) at 5 V | - | 78 | - | mA |
| Digital Supply Current (DVDD) at 3.3 V | - | 50 | - | mA |
| Input Clock Frequency | - | 24.576 | - | MHz |
| Power Dissipation (5 V/3.3 V) | - | 555 | - | mW |
Key Features
- AC '97 compatible with enhanced features
- Supports 20-bit data format at 48 kHz and 96 kHz sample rates
- S/PDIF output
- Multiple audio input channels including line inputs, microphone inputs, and auxiliary inputs
- Multiple audio output channels including headphone outputs and line outputs
- Proprietary ESD protection circuitry
- Low power consumption with various power-down states
- Programmable volume controls with 32 volume levels
Applications
The AD1981BJST-REEL is suitable for a variety of audio processing applications, including:
- Personal computers and laptops
- Consumer audio equipment
- Automotive audio systems
- Embedded systems requiring multi-channel audio capabilities
Q & A
- What is the resolution of the ADC in the AD1981BJST-REEL?
The ADC resolution is 16 bits. - What are the typical power supply ranges for the AD1981BJST-REEL?
The analog supply range (AVDD) is 4.65 V to 5.25 V, and the digital supply range (DVDD) is 3.15 V to 3.45 V. - What is the input clock frequency for the AD1981BJST-REEL?
The recommended input clock frequency is 24.576 MHz. - Does the AD1981BJST-REEL support S/PDIF output?
Yes, it supports S/PDIF output. - What is the dynamic range of the ADC in the AD1981BJST-REEL?
The dynamic range of the ADC is typically 85 dB. - How many volume levels are available for the headphone volume control?
There are 32 volume levels with 31 steps of 1.5 dB each. - Is the AD1981BJST-REEL still in production?
No, the AD1981BJST-REEL is no longer in production. - What type of packaging does the AD1981BJST-REEL use?
The component is packaged in a 48-pin LQFP (Low Profile Quad Flat Package). - What are some of the key applications for the AD1981BJST-REEL?
Key applications include personal computers, consumer audio equipment, automotive audio systems, and embedded systems. - Does the AD1981BJST-REEL have ESD protection?
Yes, it features proprietary ESD protection circuitry.
