ASAHI KASEI [AK5357]
MS0294-E-00 2004/02
- 1 -





GENERAL DESCRIPTION
The AK5357 is a stereo A/D Converter with wide sampling rate of 4kHz ∼ 96kHz and is suitable for
multimedia audio system. The AK5357 achieves high accuracy and low cost by using Enhanced dual bit
∆Σ techniques. The AK5357 requires no external components because the analog inputs are
single-ended. The audio interface has two formats (MSB justified, I
2
S) and can correspond to many
systems like Karaoke, surround.


FEATURES
† Stereo ∆Σ ADC
† On-Chip Digital Anti-Alias Filtering
† Single-ended Input
† Digital HPF for DC-Offset cancel
† S/(N+D): 88dB@5V, 86dB@3V for 48kHz
† DR: 102dB@5V, 100dB@3V for 48kHz
† S/N: 102dB@5V, 100dB@3V for 48kHz
† Sampling Rate Ranging from 4kHz to 96kHz
† Master Clock:
256fs/384fs/512fs/768fs (4kHz ∼ 48kHz)
256fs/384fs (48kHz ∼ 96kHz)
† Input level: TTL/CMOS selectable
† Master / Slave Mode
† Audio Interface: 24bit MSB justified / I
2
S selectable
† Power Supply: 2.7 ∼ 5.5V
† Ta = −40 ∼ 85°C
† Small 16pin TSSOP Package
† AK5381 Pin-compatible

∆Σ
Modulator
MCLK
AINL
LRCK
SCLK
SDTO
DIF
VCOM
Clock Divider
AINR
AGNDVA
Decimation
Filter
Serial I/O
Interface
Voltage Reference
CKS1
DGNDVD
CKS2
∆Σ
Modulator
Decimation
Filter
PDNCKS0


24Bit 96kHz ∆Σ ADC
AK5357