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CDB4222 Datasheet(PDF) 9 Page - Cirrus Logic |
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CDB4222 Datasheet(HTML) 9 Page - Cirrus Logic |
9 / 26 page FUNCTIONAL DESCRIPTION Overview The CS4222 has 2 channels of 20-bit analog-to- digital conversion and 2 channels of 20-bit digital-to-analog conversion. All ADCs and DACs are delta-sigma converters. The DAC out- p ut s h ave a d ju st ab le o utp ut a tte nua tio n implemented in 0.5 dB step resolution. The de- vice also includes a soft mute function and digital de-emphasis for 32, 44.1, and 48 kHz. Digital audio data for the DACs and from the ADCs is communicated over separate serial ports. This allows concurrent writing to and reading from the device. Control for the func- tions available on the CS4222 are communicated over a serial microcontroller interface. Figure 1 shows the recommended connection diagram for the CS4222. The device can be operated with or without the control port interface. Additional functions are available when the control port interface is used as outlined in Table 1. Control Port Stand-alone Volume control - Adjustable Mute ramp rate Fixed Mute ramp rate Enable zero crossing detect Disabled Disable mute on zero input Enabled De-emphasis De-emphasis Mute DAC outputs Mute DAC outputs ADC Input Peak Level Detect - 16, 18, 20 bit Interface 20 bit I 2S Interface Individual ADC/DAC power down Codec power down Cal on command Cal on power-up High pass enable/disable High pass enabled Analog Inputs Line Level Inputs AINR-, AINR+, AINL-, and AINL+ are the dif- ferential line level input pins (See Figure 1). Figure 2 shows an AC coupled optional input buffer which combines level shifting with single- ended to differential conversion. Analog inputs must be DC coupled into the CS4222 with a 2.3V common mode input voltage. Any DC off- Figure 2. Optional Line Input Buffer Table 1. Control Port vs. Stand-alone CS4222 DS236PP3 9 |
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Similar Description - CDB4222 |
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