ASAHI KASEI
[AK4551]
AK4551
Low Power & Small Package 20bit ∆Σ CODEC
GENERAL DESCRIPTION
The AK4551 is a low voltage ...
ASAHI KASEI
[AK4551]
AK4551
Low Power & Small Package 20bit ∆Σ CODEC
GENERAL DESCRIPTION
The AK4551 is a low
voltage 20bit A/D & D/A converter for portable digital audio system. In the AK4551, 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 AK4551 are single-ended, therefore, any external filters are not required. The AK4551 is suitable for portable digital audio system, as the AK4551 is lower power dissipation and a smaller package than AK4519.
FEATURES
o HPF for DC-offset cancel (fc=3.4Hz) o Single-ended ADC
- S/(N+D): 82dB@VDD=2.5V - Dynamic Range, S/N: 89dB@VDD=2.5V o 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 o Audio I/F format: MSB First, 2’s Compliment (AK4519 compatible) - ADC: 20bit MSB justified - DAC: 20bit LSB justified o Input/Output
Voltage: 0.6 X VDD (=1.5Vpp@VDD=2.5V) o High Jitter Tolerance o Sampling Rate: 8kHz to 50kHz o Master Clock: 256fs or 384fs or 512fs o Power Supply: 2.2 to 3.6V o Low Power Supply Current: 10mA o Ta = -20 to 85°C o Very Small Package: 16pin TSSOP
AINL AINR
VDD VSS
∆Σ Modulator
∆Σ Modulator
VCOM
Common
Voltage
Decimation Filter
Decimation Filter
Clock Divider
Serial I/O Interface
AOUTL AOUTR
∆Σ 8X
LPF
Modulator
Interpolator
∆Σ 8X
LPF
Modulator
Interpolator
MCLK LRCK SCLK
SDTO SDTI DEM0 DEM1
PWDA PWAD
MS0029-E-00
-1-
2000/5
ASAHI KAS...