Low-Power Single-Chip Codec Integrates PLL And Audio Amps

May 13, 2002
The AK4534 single-chip codec combines low power consumption, a 16-bit monaural analog-to-digital converter (ADC), a stereo digital-to-analog converter (DAC), a phase-locked loop (PLL), and headphone and speaker amplifiers. Designed for portable...

The AK4534 single-chip codec combines low power consumption, a 16-bit monaural analog-to-digital converter (ADC), a stereo digital-to-analog converter (DAC), a phase-locked loop (PLL), and headphone and speaker amplifiers. Designed for portable applications, the ADC and DAC support 16-bit sampling rates from 8 to 48 kHz. The built-in mono ADC, automatic level control (ALC), and microphone amplifiers ensure trouble-free recording for voice recognition and audio memo applications. The headphone delivers up to 15 mW into 8- to 32-Ω loads, while the mono speaker delivers up to 150 mW.

Dual mono and stereo analog inputs can be used to mix a variety of external analog signals from cell-phone controllers, MP3 decoders, and external sources. With this mixing, designers can create a unified audio system for combination cell-phone/PDA devices. The built-in PLL provides internal audio clock generation, simplifying synchronization of system microprocessor and audio clocks. Also, the AK4534 requires a single 2.4- to 3.6-V power supply. The codec's programmable registers manage its power. All of the chip's functional blocks can be powered down individually, letting circuit and system designers take an active role in power management.

Available in a 48-pin LQFP package or a small leadless 52-pin QFN package, the AK4534 costs $8.21 in 1000-unit quantities.

AKM Semiconductor
www.akm.com; (888) 256-7364

Sponsored Recommendations

Board-Mount DC/DC Converters in Medical Applications

March 27, 2024
AC/DC or board-mount DC/DC converters provide power for medical devices. This article explains why isolation might be needed and which safety standards apply.

Use Rugged Multiband Antennas to Solve the Mobile Connectivity Challenge

March 27, 2024
Selecting and using antennas for mobile applications requires attention to electrical, mechanical, and environmental characteristics: TE modules can help.

Out-of-the-box Cellular and Wi-Fi connectivity with AWS IoT ExpressLink

March 27, 2024
This demo shows how to enroll LTE-M and Wi-Fi evaluation boards with AWS IoT Core, set up a Connected Health Solution as well as AWS AT commands and AWS IoT ExpressLink security...

How to Quickly Leverage Bluetooth AoA and AoD for Indoor Logistics Tracking

March 27, 2024
Real-time asset tracking is an important aspect of Industry 4.0. Various technologies are available for deploying Real-Time Location.

Comments

To join the conversation, and become an exclusive member of Electronic Design, create an account today!