AK4551 Datasheet, PDF (1/15 Pages) Asahi Kasei Microsystems – LOW POWER & SMALL PACKAGE 20BIT CODEC

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
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