AK4554 Datasheet, PDF (1/17 Pages) Asahi Kasei Microsystems – Low Power & Small Package 16bit ΔΣ CODEC

ASAHI KASEI
[AK4554]
AK4554
Low Power & Small Package 16bit ∆Σ CODEC
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
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
PWDAN
PWADN
MS0325-E-01
-1-
2005/08