[AK4425A]
AK4425A
192kHz 24-Bit Stereo
ΔΣ
DAC with 2Vrms Output
GENERAL DESCRIPTION
The AK4425A 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 AKM’s multi bit modulator architecture, the AK4425A delivers a wide dynamic range while
preserving linearity for improved THD+N performance. The AK4425A 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 AK4425A 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
Digital De-emphasis Filter: 32kHz, 44.1kHz or 48kHz
Soft mute
Digital Attenuator (Linear 256 Step)
Control I/F: 3-wire
Audio I/F format: 24Bit MSB justified, 24/20/16 LSB justified or
I
2
S compatible
Master clock: 256fs, 384fs, 512fs, 768fs or 1152fs (Normal Speed Mode)
128fs, 192fs, 256fs or 384fs (Double Speed Mode)
128fs, 192fs (Quad Speed Mode)
THD+N: -91dB
Dynamic Range: 106dB
Automatic Power-on Reset Circuit
Power supply: +4.5
∼
+5.5V
Ta = -20 to 85°C
Small Package: 16pin TSSOP (6.4mm x 5.0mm)
MS1127-E-01
-1-
2011/03
AKM [ ASAHI KASEI MICROSYSTEMS ]
