PDF AK5358 Data sheet ( Hoja de datos )

Número de pieza	AK5358
Descripción	24-Bit ADC
Fabricantes	Asahi Kasei Microsystems
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No Preview Available ! www.DataSheet.co.kr ASAHI KASEI [AK5358] AK5358 96kHz 24-Bit ∆Σ ADC GENERAL DESCRIPTION The AK5358 is a stereo A/D Converter with wide sampling rate of 8kHz ∼ 96kHz and is suitable for consumer to professional audio system. The AK5358 achieves high accuracy and low cost by using Enhanced dual bit ∆Σ techniques. The AK5358 requires no external components because the analog inputs are single-ended. The audio interface has two formats (MSB justified, I2S) and can correspond to various systems like DTV, DVR and AV Receiver. FEATURES Linear Phase Digital Anti-Alias Filtering Single-ended Input Digital HPF for DC-Offset cancel S/(N+D): 92dB DR: 102dB S/N: 102dB Sampling Rate Ranging from 8kHz to 96kHz Master Clock: 256fs/384fs/512fs/768fs (8kHz ∼ 48kHz) 256fs/384fs (48kHz ∼ 96kHz) Input level: CMOS Master / Slave Mode Audio Interface: 24bit MSB justified / I2S selectable Power Supply: 4.5 ∼ 5.5V (Analog), 2.7 ∼ 3.6V (Digital) Ta = −20 ∼ 85°C Small 16pin TSSOP Package AK5357/59/81 Pin-compatible VA AGND VD DGND MCLK AINL AINR VCOM ∆Σ Modulator ∆Σ Modulator Voltage Reference Decimation Filter Decimation Filter Clock Divider Serial I/O Interface LRCK SCLK SDTO CKS2 CKS1 CKS0 PDN DIF MS0438-E-00 -1- 2005/11 Datasheet pdf - http://www.DataSheet4U.net/ 1 page www.DataSheet.co.kr ASAHI KASEI [AK5358] ANALOG CHARACTERISTICS (Ta=25°C; VA=5.0V, VD=3.3V; AGND=DGND=0V; fs=48kHz, 96kHz; SCLK=64fs; Signal Frequency=1kHz; 24bit Data; Measurement frequency=20Hz ∼ 20kHz at fs=48kHz, 40Hz ∼ 40kHz at fs=96kHz; unless otherwise specified) Parameter min typ max Units ADC Analog Input Characteristics: Resolution 24 Bits Input Voltage (Note 5) 2.7 3.0 3.3 Vpp S/(N+D) fs=48kHz −1dBFS 82 92 dB BW=20kHz −60dBFS - 39 dB fs=96kHz −1dBFS - 90 dB BW=40kHz −60dBFS - 38 dB DR (−60dBFS, A-weighted) 94 102 dB S/N (A-weighted) 94 102 dB Input Resistance fs=48kHz fs=96kHz Interchannel Isolation Interchannel Gain Mismatch Gain Drift Power Supply Rejection (Note 6) 13 9 90 - 20 14 110 0.1 0.5 100 - 50 Power Supplies Power Supply Current Normal Operation (PDN pin = “H”) VA 12 18 VD (fs=48kHz) 35 VD (fs=96kHz) 69 Power down mode (PDN pin = “L”) (Note 7) VA+VD 10 100 Note 5. This value is the full scale (0dB) of the input voltage. Input voltage is proportional to VA voltage. Vin = 0.6 x VA (Vpp). Note 6. PSR is applied to VA and VD with 1kHz, 50mVpp. Note 7. All digital input pins and CKS1 pin are held VD or DGND. kΩ kΩ dB dB ppm/°C dB mA mA mA µA MS0438-E-00 -5- 2005/11 Datasheet pdf - http://www.DataSheet4U.net/ 5 Page www.DataSheet.co.kr ASAHI KASEI [AK5358] OPERATION OVERVIEW System Clock MCLK, SCLK and LRCK (fs) clocks are required in slave mode. The LRCK clock input must be synchronized with MCLK, however the phase is not critical. Table 1 shows the relationship of typical sampling frequency and the system clock frequency. MCLK frequency, SCLK frequency and master/slave are selected by CKS2-0 pins as shown in Table 2. All external clocks (MCLK, SCLK and LRCK) must be present unless PDN pin = “L”. If these clocks are not provided, the AK5358 may draw excess current due to its use of internal dynamically refreshed logic. If the external clocks are not present, place the AK5358 in power-down mode (PDN pin = “L”). In master mode, the master clock (MCLK) must be provided unless PDN pin = “L”. fs 32kHz 44.1kHz 48kHz 96kHz MCLK 256fs 384fs 512fs 8.192MHz 12.288MHz 16.384MHz 11.2896MHz 16.9344MHz 22.5792MHz 12.288MHz 18.432MHz 24.576MHz 24.576MHz 36.864MHz N/A Table 1. System Clock Example 768fs 24.576MHz 33.8688MHz 36.864MHz N/A Mode 0 1 2 3 4 5 6 7 CKS2 L L L L H H H H CKS1 L L H H L L H H CKS0 L H L H L H L H Input Level Master/Slave MCLK CMOS Slave 256/384fs (8k≤fs≤96k) 512/768fs (8k≤fs≤48k) Reserved CMOS Master 256fs (8k≤fs≤96k) CMOS Master 512fs (8k≤fs≤48k) Reserved Reserved CMOS Master 384fs (8k≤fs≤96k) CMOS Master 768fs (8k≤fs≤48k) Table 2. Operation Mode Select Note 13. SDTO outputs 16bit data at SCLK=32fs. SCLK ≥ 48fs or 32fs (Note 13) 64fs 64fs 64fs 64fs MS0438-E-00 - 11 - 2005/11 Datasheet pdf - http://www.DataSheet4U.net/ 11 Page

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