ASAHI KASEI. [AKD].. / – 7 -. [ADC Plot: fs=48kHz]. AKM. AK THD+N vs. Input Level. VA=VD=V, fs=48kHz, fin=1kHz. AKM Semiconductor AKET. Explore Integrated Circuits (ICs) on Octopart: the fastest AKET. Dual Channel Dual ADC Delta-Sigma 96ksps bit. The AK achieves high accuracy and low cost by using Enhanced dual bit ∆Σ WARNING: AKM assumes no responsibility for the usage beyond the.
The AK samples the analog inputs at 64fs. The passband and stopband frequencies scale with fs. The Ak, includes an anti-aliasing filter RC filter to attenuate a noise around 64fs. The calculated delay time induced by digital filtering. Table 1 shows the relationship of typical sampling frequency and the system clock frequency.
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The audio interface supports both master and slave modes. Normal operation is not guaranteed at these extremes.
The digital filter rejects noise above the stop band except for multiples of 64fs. AKM sales office or authorized distributor concerning their current status.
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The AK requires no external components because the analog inputs are single-ended. An electrolytic capacitor 2. A critical component is one whose failure to function or perform may reasonably be expected to result, whether directly or indirectly, in the loss of the safety or effectiveness of the device or system containing it, and which must therefore meet very high standards of wkm and reliability.
An analog initialization cycle starts after exiting the power-down mode. If these clocks are not provided, the AK may draw excess current due to its use of internal dynamically refreshed logic. Operation at or beyond these limits may result in permanent damage to the device. Grounding and Power Supply Decoupling The AK requires careful attention to power supply and grounding arrangements. This reset should always be done after power-up.
The reference frequency of these responses is 1kHz. Before considering any use or application, consult akj Asahi Kasei Microsystems Co. All voltages with respect to ground. Lead frame surface treatment: Input voltage is proportional to VA voltage. The ADC outputs settle in the data corresponding to the input signals after the end of initialization Settling approximately takes the group delay time. All digital input pins should not be left floating.
The cut-off frequency of the HPF is 1. All signals, especially clocks, should be kept 53381 from the VCOM pin in order to avoid unwanted coupling into the AK No load current may be drawn 538 these pins. The input signal range scales with the supply ajm and nominally 0.
An evaluation board is available which demonstrates application circuits, the optimum layout, power supply 5318 and measurement results. Resolution 24 Bits Input Voltage Note 4 2. In master mode, the internal timing starts when MCLK is input. This value is the full scale 0dB of the input voltage.
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AKM assumes no responsibility for the usage beyond the conditions in this datasheet. This time is from the input of an analog signal to the setting of 24bit data both channels to the ADC output register for ADC.
Voltage Reference The voltage input to VA sets the analog input range. Alternatively if VA and VD are supplied separately, the 53811 up sequence is not critical.
The power up sequence between VA and VD is not critical. VA and VD are usually supplied from the analog supply in the system. In slave mode, the internal timing starts clocking by the rising edge falling edge at mode 1 of LRCK after exiting from reset and power down state by MCLK.
Date Code Marketing Code: A hazard related device or system 5831 one designed or intended for life support or maintenance of safety or for applications in medicine, aerospace, nuclear energy, or other fields, in which its failure to function or perform may reasonably be expected to result in loss of life or in significant injury or damage to person or property.
System analog ground and digital ground should be connected together near to where the supplies are brought onto the printed circuit board.
Decoupling capacitors should be as near to the AK as possible, with the small value ceramic capacitor being the nearest.