PDF AK4380 Data sheet ( Hoja de datos )

Número de pieza	AK4380
Descripción	100dB 24-BIT 96kHz 2CH DAC
Fabricantes	Asahi Kasei Microsystems
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No Preview Available ! ASAHI KASEI [AK4380] AK4380 100dB 24Bit 96kHz 2ch DAC GENERAL DESCRIPTION The AK4380 offers the perfect mix for cost and performance based audio systems. Using AKM's multi bit architecture for its modulator the AK4380 delivers a wide dynamic range while preserving linearity for improved THD+N performance. The AK4380 integrates a combination of SCF and CTF filters, removing the need for high cost external filters and increasing performance for systems with excessive clock jitter. The 24 Bit word length and 96kHz sampling rate make this part ideal for a wide range of applications including DVD and AC-3 systems. The AK4380 is offered in a space saving 16pin TSSOP package. FEATURES o Sampling Rates Ranging from 8kHz to 96kHz o 128x Oversampling (Normal speed mode) o 64x Oversampling (Double speed mode) o 24Bit 8x FIR Digital Filter o 2nd order Analog LPF o On chip Buffer with Single End Output o Digital de-emphasis for 32k, 44.1k and 48kHz sampling o Soft mute o I/F format: 24bit MSB justified, 24/20/16bit LSB justified, I2S o Master clock: 256fs, 384fs, 512fs or 768fs (Normal speed mode) 128fs, 192fs, 256fs or 384fs (Double speed mode) o THD+N: -88dB o Dynamic Range: 100dB o High Tolerance to Clock Jitter o Power supply: 4.5 to 5.5V o Space Saving 16 Pin TSSOP (6.4mm x 5.0mm) Package P/S MCLK SMUTE/CSN DFS/CCLK DIF0/CDTI LRCK BICK SDTI µP Interface De-emphasis Control Clock Divider Audio Data Interface 8X Interpolator 8X Interpolator ∆Σ Modulator ∆Σ Modulator LPF LPF VDD VSS VCOM DZF AOUTL AOUTR PDN VREF MS0018-E-01 -1- 2000/8 1 page ASAHI KASEI [AK4380] FILTER CHARACTERISTICS (Ta = 25°C; VDD = 4.5 ∼ 5.5V; fs = 44.1kHz; DEM0 = “1”, DEM1 = “0”) Parameter Symbol min Digital filter Passband ±0.05dB -6.0dB (Note 7) PB 0 - Stopband (Note 7) SB 24.25 Passband Ripple PR Stopband Attenuation SA 54 Group Delay (Note 8) GD - Digital Filter + LPF Frequency Response 0 ∼ 20.0kHz 40.0kHz FR - - typ 22.05 19.1 ± 0.2 ± 0.3 max 20.0 - ± 0.02 - - - Units kHz kHz kHz dB dB 1/fs dB dB Notes: 7. The passband and stopband frequencies scale with fs (system sampling rate). For example, PB=0.4535×fs (@±0.05dB), SB=0.546×fs. 8. The calculating delay time which occurred by digital filtering. This time is from setting the 16/24bit data of both channels to input register to the output of analog signal. DIGITAL CHARACTERISTICS (Ta = 25°C; VDD = 4.5 ∼ 5.5V) Parameter Symbol min High-Level Input Voltage VIH 2.2 Low-Level Input Voltage VIL - High-Level Output Voltage (Iout = -80µA) VOH VDD-0.4 Low-Level Output Voltage (Iout = 80µA) VOL - Input Leakage Current (Note 9) Iin - Note: 9. P/S pin has internal pull-up device, normally 100kΩ. typ - - - - max Units -V 0.8 V -V 0.4 V ± 10 µA MS0018-E-01 -5- 2000/8 5 Page ASAHI KASEI [AK4380] LRCK BICK (64fs) SDTI Mode 1 SDTI Mode 4 01 8 9 10 11 12 Don’t care 19:MSB, 0:LSB 19 Don’t care 23 22 21 20 19 23:MSB, 0:LSB Lch Data 31 0 1 8 9 10 11 12 0 Don’t care 19 0 Don’t care 23 22 21 20 19 Rch Data 31 0 1 0 0 Figure 2. Mode 1,4 Timing LRCK BICK (64fs) SDTI 01 2 22 23 24 30 31 0 1 2 22 23 24 30 31 0 1 23 22 1 0 Don’t care 23:MSB, 0:LSB Lch Data 23 22 Figure 3. Mode 2 Timing 1 0 Don’t care Rch Data 23 22 LRCK BICK (64fs) SDTI 0 12 3 23 24 25 31 0 1 2 3 23 24 25 31 0 1 23 22 1 0 Don’t care 23:MSB, 0:LSB Lch Data 23 22 Figure 4. Mode 3 Timing 1 0 Don’t care Rch Data 23 MS0018-E-01 - 11 - 2000/8 11 Page

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