AKM AKD4420ET

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Overview

GENERAL DESCRIPTION The 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 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 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: or 1152fs (Normal Speed Mode) or 384fs (Double Speed Mode) 128fs, 192fs (Quad Speed Mode) THD+N: -92dB Dynamic Range: 105dB Automatic Power-on Reset Circuit Power supply: to 85�C (ET), to 85�C (VT) Small Package: 16pin TSSOP x 5.0mm)

Zero Input Detect Pin Charge Pump Power Supply Pin: 4.5V5.5V Ground Pin2 Negative Voltage Output Pin Connect to VSS2 with a 1.0F capacitor that should have the low ESR 16 (Equivalent Series Resistance) over all temperature range. When this VEE O capacitor has the polarity, the positive polarity pin should be connected to the VSS2 pin. Non polarity capacitors can also be used. Note: All input pins except for the CN pin should not be left floating.

Features