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AK4420_10 Datasheet, PDF (1/20 Pages) Asahi Kasei Microsystems – 192kHz 24-Bit Stereo ΔΣ DAC with 2Vrms Output | |||
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[AK4420]
AK4420
192kHz 24-Bit Stereo ÎΣ DAC with 2Vrms Output
GENERAL DESCRIPTION
The AK4420 is a 5V 24-bit stereo DAC with an integrated 2Vrms output buffer. A charge pump in the
buffer develops an internal negative power supply rail that enables a ground-referenced 2Vrms output.
Using AKMâs multi bit modulator architecture, the AK4420 delivers a wide dynamic range while preserving
linearity for improved THD+N performance. The AK4420 integrates a combination of switched-capacitor
and continuous-time filters, increasing performance for systems with excessive clock jitter. The 24-bit
word length and 192kHz sampling rate make this part ideal for a wide range of consumer audio
applications, such as DVD, AV receiver system and set-top boxes. The AK4420 is offered in a space
saving 16pin TSSOP package.
FEATURES
 Sampling Rate Ranging from 8kHz to 192kHz
 128 times Oversampling (Normal Speed Mode)
 64 times Oversampling (Double Speed Mode)
 32 times Oversampling (Quad Speed Mode)
 24-Bit 8 times FIR Digital Filter
 Switched-Capacitor Filter with High Tolerance to Clock Jitter
 Single Ended 2Vrms Output Buffer
 Soft mute
 I/F format: 24-Bit MSB justified or I2S
 Master clock: 512fs, 768fs or 1152fs (Normal Speed Mode)
256fs or 384fs (Double Speed Mode)
128fs, 192fs (Quad Speed Mode)
 THD+N: -92dB
 Dynamic Range: 105dB
 Automatic Power-on Reset Circuit
 Power supply: +4.5 ⼠+5.5V
 Ta = -20 to 85°C (ET), -40 to 85°C (VT)
 Small Package: 16pin TSSOP (6.4mm x 5.0mm)
MCLK
SMUTE
DIF
Control
Interface
LRCK
BICK
SDTI
Audio
Data
Interface
Clock
Divider
8X
Interpolator
ÎΣ
Modulator
SCF
LPF
8X
Interpolator
ÎΣ
Modulator
SCF
LPF
Charge
Pump
CP
CN VEE VSS2
1μ
1μ
CVDD
VDD
DZF
VSS1
AOUTL
AOUTR
MS0683-E-06
-1-
2010/06
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