Portable audio applications with a mono codec

The CJC8988 is a low power, high quality stereo CODEC designed for portable digital audio applications. The device integrates complete interfaces to 2 stereo headphone or line out ports. External component requirements are drastically reduced as no separate headphone amplifiers are required. Advanced on-chip digital signal processing performs graphic equaliser, 3-D sound enhancement and automatic level control for the microphone or line input. The CJC8988 can operate as a master or a slave, with various master clock frequencies including 12 or 24MHz for USB devices, or standard 256fs rates like 12.288MHz and 24.576MHz. Different audio sample rates such as 96kHz, 48kHz, 44.1kHz are generated directly from the master clock without the need for an external PLL. The CJC8988 operates at supply voltages down to 1.8V, although the digital core can operate at voltages down to 1.5V to save power, and the maximum for all supplies is 3.3Volts. Different sections of the chip can also be powered down under software control. The CJC8988 is supplied in a very small and thin 4x4mm COL package, ideal for use in hand-held and portable systems.

Product detail

 DAC SNR 93dB (‘A’ weighted), THD –87dB at 48kHz, 1.8V 

 ADC SNR 91dB (‘A’ weighted), THD -81dB at 48kHz, 1.8V 

 2x On-chip Headphone Drivers -THD –78dB, SNR 93dB with 16Ω load Hz, 1.8V 

 Digital Graphic Equalizer 

 Low Power -7.8mW stereo playback (1.8V supplies) -16.8mW record and playback (1.8V supplies)

 Low Supply Voltages -Analogue 1.8V to 3.3V -Digital core: 1.5V to 3.3V -Digital I/O: 1.8V to 3.3V 

 256fs / 384fs or USB master clock rates: 12MHz, 24MHz 

 Audio sample rates: 8kHz, 11.025kHz, 16kHz, 22.05kHz, 24kHz, 32kHz, 44.1kHz, 48kHz, 8.2kHz, 96kHz generated internally from master clock

 4x4mm COL package