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AK4421ET Datasheet(PDF) 1 Page - Asahi Kasei Microsystems |
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AK4421ET Datasheet(HTML) 1 Page - Asahi Kasei Microsystems |
1 / 19 page [AK4421] MS0945-E-01 2008/08 - 1 - GENERAL DESCRIPTION The AK4421 is 3.3V 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 AK4421 delivers a wide dynamic range while preserving linearity for improved THD+N performance. The AK4421 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 portable A/V players, set-top boxes, and digital televisions. The AK4421 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 I 2S Master clock: 512fs, 768fs or 1152fs (Normal Speed Mode) 256fs or 384fs (Double Speed Mode) 128fs or 192fs (Quad Speed Mode) THD+N: -92dB (-3dB output level) Dynamic Range: 102dB Automatic Power-on Reset Circuit Power supply: +3.0 ∼ +3.6V Ta = -20 to 85 °C Small Package: 16pin TSSOP (6.4mm x 5.0mm) 192kHz 24-Bit Stereo ΔΣ DAC with 2Vrms Output AK4421 DIF LRCK BICK SDTI Audio Data Interface MCLK ΔΣ Modulator AOUTL 8X Interpolator SCF LPF AOUTR VDD VSS1 Control Interface Clock Divider ΔΣ 8X Interpolator SCF LPF Charge Pump CP CN VEE VSS2 CVDD 1μ 1μ DZF SMUTE Modulator |
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