PDF AK5383 Data sheet ( Hoja de datos )

Número de pieza	AK5383
Descripción	Enhanced Dual Bit 96kHz 24-Bit ADC
Fabricantes	Asahi Kasei Microsystems
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No Preview Available ! ASAHI KASEI [AK5383] AK5383 Enhanced Dual Bit ∆Σ 96kHz 24-Bit ADC GENERAL DESCRIPTION The AK5383 is a 24bit, 128x oversampling 2ch A/D Converter for professional digital audio systems. The modulator in the AK5383 uses the new developed Enhanced Dual Bit architecture. This new architecture achieves the wide dynamic range, while keeping much the same superior distortion characteristics as conventional Single Bit way. The AK5383 performs 110dB dynamic range, so the device is suitable for professional studio equipment such as digital mixer, digital VTR etc. FEATURES p Enhanced Dual Bit ADC p Sampling Rate: 1kHz~108kHz p Full Differential Inputs p S/(N+D): 103dB p DR: 110dB p S/N: 110dB p High Performance Linear Phase Digital Anti-Alias filter • Passband: 0~21.768kHz(@fs=48kHz) • Ripple: 0.001dB • Stopband: 110dB p Digital HPF & Offset Calibration for Offset Cancel p Power Supply: 5V±5%(Analog), 3~5.25V(Digital) p Power Dissipation: 210mW p Package: 28pin SOP, VSOP p AK5393 Pin compatible SMODE1 SMODE2 12 11 SCLK LRCK FSYNC 14 13 16 VREFL 1 GNDL 2 3 VCOML 4 AINL+ AINL- 5 ZCAL 6 25 AINR+ 24 AINR- 26 VCOMR 28 VREFR GNDR 27 Voltage Reference Delta-Sigma Modulator Delta-Sigma Modulator Voltage Reference Serial Output Interface 15 SDATA Decimation Filter Decimation Filter HPF HPF 19 HPFE 17 MCLK 18 DFS Controller Calibration SRAM 23 22 VA AGND 21 BGND 9 10 CAL RST 78 VD DGND M0049-E-03 -1- 2000/4 1 page ASAHI KASEI ABSOLUTE MAXIMUM RATINGS (AGND,BGND,DGND=0V; Note 1) Parameter Symbol min Power Supplies: Analog Digital \|BGND-DGND\| (Note 2) Input Current, Any Pin Except Supplies Analog Input Voltage VA VD ∆GND IIN VINA -0.3 -0.3 - - -0.3 Digital Input Voltage Ambient Temperature (power applied) AK5383VS AK5383VF Storage Temperature VIND Ta Ta Tstg -0.3 -10 -40 -65 Notes: 1. All voltages with respect to ground. 2. AGND, BGND and DGND must be connected to the same analog ground plane. max 6.0 6.0 0.3 ±10 VA+0.3 VD+0.3 70 85 150 WARNING: Operation at or beyond these limits may result in permanent damage to the device. Normal operation is not guaranteed at these extremes. [AK5383] Units V V V mA V V °C °C °C RECOMMENDED OPERATING CONDITIONS (AGND,BGND,DGND=0V; Note 1) Parameter Symbol min typ Power Supplies: Analog VA 4.75 (Note 3) Digital VD 3.0 Notes:1. All voltages with respect to ground. 3. The power up sequence between VA and VD is not critical. 5.0 3.3 * AKM assumes no responsibility for the usage beyond the conditions in this data sheet. max 5.25 5.25 Units V V M0049-E-03 -5- 2000/4 5 Page ASAHI KASEI [AK5383] n System Clock Input OPERATION OVERVIEW The external clocks which are required to operate the AK5383 are MCLK, LRCK(fs), SCLK. MCLK should be synchronized with LRCK but the phase is free of care. MCLK should be 256fs in normal sampling mode(DFS="L") and double sampling mode needs 128fs as MCLK. Table 2 illustrates standard audio word rates and corresponding frequencies used in the AK5383. As the AK5383 includes the phase detect circuit for LRCK, the AK5383 is reset automatically when the synchronization is out of phase by changing the clock frequencies. Therefore, the reset is only needed for power-up. All external clocks must be present unless RST ="L", otherwise excessive current may result from abnormal operation of internal dynamic logic. Speed LRCK (max) SCLK MCLK Normal(DFS ="L") 54kHz ~128fs 256fs Double(DFS ="H") 108kHz ~64fs 128fs Table 1. System Clocks fs 32.0kHz 44.1kHz 48.0kHz 96.0kHz MCLK 8.1920MHz 11.2896MHz 12.2880MHz 12.2880MHz SCLK 4.0960MHz 5.6448MHz 6.1440MHz 6.1440MHz Table 2. Examples of System Clock Frequency n Serial Data Interface The AK5383 supports four serial data formats which can be selected via SMODE1 and SMODE2 pins(Table 3). The data format is MSB-first, 2's complement. Figure Figure 1 Figure 2 Figure 3 Figure 4 SMODE2 L L H H SMODE1 L H L H Mode Slave Mode Master Mode I2S Slave Mode I2S Master Mode LRCK Lch = H, Rch =L Lch =H, Rch =L Lch =L, Rch =H Lch =L, Rch =H Table 3. Serial I/F Format M0049-E-03 - 11 - 2000/4 11 Page

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