Overview
The AD1845JPZ, produced by Analog Devices Inc., is a Parallel-Port 16-Bit SoundPort Stereo Codec. This integrated circuit provides a complete, single-chip computer audio solution tailored for business audio and multimedia applications. It integrates key audio data conversion and control functions, making it an efficient and comprehensive solution for various audio needs.
Key Specifications
| Specification | Details |
|---|---|
| Audio Converters | Stereo pair of Sigma Delta analog-to-digital converters (ADCs) and digital-to-analog converters (DACs) |
| Sample Rates | From 4 kHz to 50 kHz derived from a single external crystal or clock source |
| Dynamic Range | Exceeds 80 dB over the 20 kHz audio band |
| Data Formats | 16-bit twos complement PCM (little endian and big endian), 8-bit unsigned linear PCM, companded µ-law, and 8-bit companded A-law |
| Bus Interface | Byte-wide parallel interface to ISA and EISA buses |
| DMA Support | Supports two DMA channels for full duplex operation |
| Power Supply | Operation from +5 V supplies |
| Power-Down Modes | Advanced power-down modes to support low power and portable computing applications |
| Package Options | 68-Lead PLCC, 100-Lead TQFP packages |
Key Features
- Single-chip integrated ΣΔ digital audio stereo codec
- Microsoft and Windows Sound System compatible
- MPC Level-2+ compliant mixing
- Programmable gain and attenuation
- On-chip capture and playback FIFOs to reduce data loss risk during DMA transfers
- Independent gain control for each channel going into the ADC
- Digital mixing capability with the ability to mix ADC output with DAC input
- On-chip anti-imaging DAC output filters and continuous-time filters
- Support for multiple low power and power-down modes
- Byte-wide bidirectional interface for data and control information
Applications
The AD1845JPZ is designed for various multimedia and business audio applications, including:
- Computer motherboards and add-in cards
- Notebook and portable computing multimedia applications
- Business audio systems requiring high-quality audio conversion and control
- Multimedia systems needing integrated audio solutions with advanced features like digital mixing and programmable gain
Q & A
- What is the AD1845JPZ?
The AD1845JPZ is a Parallel-Port 16-Bit SoundPort Stereo Codec produced by Analog Devices Inc., providing a complete single-chip computer audio solution.
- What are the supported sample rates for the AD1845JPZ?
The AD1845JPZ supports sample rates from 4 kHz to 50 kHz derived from a single external crystal or clock source.
- What data formats does the AD1845JPZ support?
The AD1845JPZ supports 16-bit twos complement PCM (little endian and big endian), 8-bit unsigned linear PCM, companded µ-law, and 8-bit companded A-law data formats.
- Does the AD1845JPZ support DMA operations?
Yes, the AD1845JPZ supports two DMA channels for full duplex operation, enabling it to capture data on one channel and play back data on a separate channel.
- What power supply does the AD1845JPZ require?
The AD1845JPZ operates from +5 V supplies.
- What are the package options for the AD1845JPZ?
The AD1845JPZ is available in 68-Lead PLCC and 100-Lead TQFP packages.
- Does the AD1845JPZ have built-in filters?
Yes, the AD1845JPZ includes on-chip anti-imaging DAC output filters and continuous-time filters.
- Can the AD1845JPZ be used in low power applications?
Yes, the AD1845JPZ supports multiple low power and power-down modes, making it suitable for notebook and portable computing multimedia applications.
- What is the dynamic range of the AD1845JPZ?
The dynamic range of the AD1845JPZ exceeds 80 dB over the 20 kHz audio band.
- Is the AD1845JPZ compatible with specific computer buses?
Yes, the AD1845JPZ has a byte-wide parallel interface to ISA and EISA computer buses.
