武漢光華芯24位低功耗立體聲音頻編解碼器CJC8988完美替代WM8988

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 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.

DAC SNR 93dB (‘A’ weighted), THD –87dB at 48KHz, 1.8V
? ADC SNR 91dB (‘A’ weighted), THD -81dB at 48KHz, 1.8V
? Programmable ALC / Noise Gate
? 2x On-chip Headphone Drivers
-THD –78dB , SNR 93dB with 16Ω load Hz, 1.8V
? Digital Graphic Equaliser
? Low Power
-7.8mW stereo playback (1.8V supplies)
-16.8mW record and playback (1.8V supplies)
? Low Supply Voltages
-Analogue 1.8V to 3V
-Digital core: 1.5V to 3V
-Digital I/O: 1.8V to 3V
? 256fs / 384fs or USB master clock rates: 12MHz, 24MHz
? Audio sample rates: 8, 11.025, 16, 22.05, 24, 32, 44.1, 48,
? 88.2, 96KHz generated internally from master clock
? 4x4mm COL package