CS53L30 datasheet(58/67 Pages) CIRRUS

Part #	CS53L30

Description	Low-Power Quad-Channel Microphone ADC with TDM Output

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Manufacturer	CIRRUS [Cirrus Logic]

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58

DS992F2

CS53L30

8 Parameter Definitions

9Plots

9.1 Digital Filter Response

9.1.1

ADC High-Pass Filter

Dynamic range. The ratio of the rms value of the signal to the rms sum of all other spectral components over the

specified bandwidth. Dynamic range is a signal-to-noise ratio measurement over the specified band width made

with a –60 dB signal.

Frequency response. A measure of the amplitude response variation from 10 Hz to 20 kHz relative to the amplitude

response at 1 kHz. Frequency response is expressed in decibel units.

Gain drift. The change in gain value with temperature, expressed in ppm/°C units.

Interchannel gain mismatch. The gain difference between left and right channel pairs. Interchannel gain mismatch

is expressed in decibel units.

Interchannel isolation. A measure of crosstalk between the left- and right-channel pairs. Interchannel Isolation is

measured for each channel at the converter's output with no signal to the input under test and a full-scale signal

applied to the other channel. Interchannel isolation is expressed in decibel units.

Load resistance and capacitance. The recommended minimum resistance and maximum capacitance required for

the internal op-amp's stability and signal integrity. The load capacitance effectively moves the band-limiting pole

of the amp in the output stage. Increasing the load capacitance beyond the recommended value can cause the

internal op-amp to become unstable.

Figure 9-1. ADC HPF Response

Figure 9-2. ADC HPF Response, Passband Detail

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