AK4554

www.DataSheet4U.com ASAHI KASEI [AK4554] Low Power & Small Package 16bit ∆Σ CODEC AK4554 GENERAL DESCRIPTION The AK4554 is a low voltage 16bit A/D & D/A converter for portable digital audio system. In the AK4554, the loss of accuracy form clock jitter is also improved by using SCF techniques for on-chip post filter. Analog signal input/output of the AK4554 are single-ended, therefore, any external filters are not required. The AK4554 is suitable for portable digital audio system, as the AK4554 is low power dissipation and a small package. FEATURES † HPF for DC-offset cancel (fc=3.4Hz) † Single-ended ADC - S/(N+D): 80dB@VDD=2.5V - Dynamic Range, S/N: 89dB@VDD=2.5V † Single-ended DAC - Digital de-emphasis for 32kHz, 44.1kHz, 48kHz sampling - S/(N+D): 85dB@VDD=2.5V - Dynamic Range, S/N: 92dB@VDD=2.5V † Audio I/F format: MSB First, 2’s Compliment (AK4550 compatible) - ADC: 16bit MSB justified - DAC: 16bit LSB justified † Input/Output Voltage: 0.6 x VDD (=1.5Vpp@VDD=2.5V) † High Jitter Tolerance † Sampling Rate: 8kHz to 50kHz † Master Clock: 256fs/384fs/512fs/768fs (fs=8kHz to 50kHz) 1024fs (fs=8kHz to 25kHz) † Power Supply: 1.6 to 3.6V † Low Power Supply Current: 8mA † Ta = −40 to 85°C † Very Small Package: 16pin TSSOP VDD VSS ∆Σ Modulator ∆Σ Modulator Common Voltage ∆Σ Modulator ∆Σ Modulator 8X Interpolator 8X Interpolator PWDAN PWADN Decimation Filter Decimation Filter Serial I/O Interface Clock Divider MCLK LRCK SCLK SDTO SDTI DEM0 AOUTL LPF DEM1 AINL AINR VCOM AOUTR ...