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Analog and mixed signal

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You are here: Overview Analog and mixed signal UDA1320/24/30, UDA1309, UDA1328, UDA1334/36/38, UDA1340/41/42/43/44/45, UDA1350/51/52/55, UDA1360/61 and UDA1380

UDA1320/24/30, UDA1309, UDA1328, UDA1334/36/38, UDA1340/41/42/43/44/45, UDA1350/51/52/55, UDA1360/61 and UDA1380
Why using separate data convertors in stead of combining them with other circuitry?
Is there a compromise possible?
Can the analog and digital supplies be combined in order to save peripheral components?
Some data convertors have more than one analog supply, can they be combined?
Which power supplies have the most influence on the analog performance?
Is a difference between analog and digital power supply allowed?
How important is the filtering of the power supplies?
Are the coils in the power supply lines really necessary?
How important is the filtering of Vref?
Is it allowed to put a certain load to the Vref?
What influences the Power Supply Rejection Ratio (PSRR)?
What is the relation between power supply and output swing?
Can Vout of a DAC be changed without changing the power supply?
What happens when a device is put in the so-called power down mode?
What is the reason that so many digital input/output data formats exist?
What is the meaning of 2�s complement?
Were is PCM standing for?
Are the data convertors master or slave devices?
Is it always necessary to apply a system clock?
What is the relation between system clock and I2S clocks?
What is the exact meaning when the system clock is 256fs?
What happens if the system clock is not a continuous clock but a burst clock?
What happens if the bit clock is a burst clock?
In most data sheets of the data convertors the bit clock is indicated as being 64fs, is there still some flexibility?
What happens if the absolute frequency of the system clock will change?
What is the advantage of fs=96 kHz?
What is the relation between the levels of the digital input signals (data and/or control signals) and the power supply?
Are the digital inputs of the data convertors TTL compatible?
What is the meaning of L3 and I2C?
Which level requires an SPDIF input?
Why using digital filters?
Why using an interpolator filter in a DAC?
Why using a decimation filter in an ADC?
Why do several sampling frequencies exist?
How to link the different sampling frequencies?
What is aliasing?
What is an anti- aliasing filter?
What is the difference between a FIR and an IIR filter?
What is a half band filter?
What is the meaning of SINX/X roll-off?
How can the SINX/X be calculated?
What is group delay?
What are the requirements for pass band ripple, stop band suppression and transition band?
How is the digital filter synchronized during start-up?
Why is the volume control range in most data convertors limited to 60 dB?
What are the trade offs between analog and digital volume control?
What is the meaning of the DC filter in the decimation filter of the ADC?
What is a noise shaper?
Why has a noise shaper always a high oversampling factor?
What is meant by the order of a noise shaper?
What are limit cycles?
How to get rid of limit cycles?
What is dither?
How can a DAC be constructed?
How can an ADC be constructed?
Why is the input/output op-amps part of most of the Philips data convertors?
How to remove the output DC?
Can the output swing of the op-amp be adjusted.
How to measure the output impedance?
Is the op-amp muted during switching on/off of the power supply?
Do the Philips data convertors contain an on-chip analog post filter?
Can the op-amp drive a headphone?
What is slew rate of an op-amp?
How many bits are necessary in a high performance digital system?
What is quantisation noise?
How to calculate the SNR of a digital system?
What is the SNR in case of oversampling?
How to calculate the SNR increase in case of a noise shaper.
What is the difference between a multibit convertor and a 1 bit convertor?
What is the difference between a 1 bit noise shaping convertor and a multibit noise shaping convertor?
Is there a relation between the order of the noise shaper, the oversampling ratio and the number of output bits?
Is the total performance influenced by cascading several devices?
Why do the Philips application diagrams of data convertors contain so many peripheral components?
How can the number of peripheral components be reduced?
What is the meaning of the RC filter at the analog output?
What is the meaning of the series resistor at the analog output?
What is the meaning of the resistor in the system clock line?
What is the meaning of the coils in the power supply lines?
What is the meaning of the capacitors in the analog input lines?
In some application diagrams a high ohmic resistor to ground at the ADC input is depicted. Why?
What determines the power-on reset time?
What are some considerations for the lay-out of data convertors?
What are the basic parameters that have to be measured in order to judge the audio performance of data convertors?
Where to find measurement standards?
What kind of analyzers can be recommended?
What is the meaning of a measuring filter?
What is the meaning of weighting filters?
How to measure the audio performance in case of extreme low or high sampling frequencies?
What is the meaning of the polarity of a data convertor?
How to measure the group delay of a data convertor?
What is the meaning of digital silence?
What is jitter?
How to quantify jitter?
How to express jitter?
How to measure jitter?
How much jitter is allowed in an audio system?
What is the audible perception of jitter?
What are the requirements for setting-up a listening test?
What is granulation noise?
What is zipper noise?
What are useful books about digital audio?