CS4228AKS

The CS4228AKS is one member of the CS4228A series.The CS4228A codec provides two analog-to-digital and six digital-to-analog delta-sigma converters, along with volume controls, in a compact 28-pin SSOP device.Combined with an IEC958 (SPDIF) receiver (like the CS8414) and surround sound decoder (such as one of the CS492x or CS493xx families), it is ideal for use in DVD player, A/V receiver and car audio systems supporting multiple standards such as Dolby Digital AC-3,AAC, DTS, Dolby ProLogic, THX, and MPEG.

Features of the CS4228AKS are:(1)Six 24-bit D/A converters:100 dB dynamic range,-90 dB THD+N; (2)Two 24-bit A/D converters:97 dB dynamic range,-95 dB THD+N; (3)sample rates up to 100 kHz; (4)pop-free digital output volume controls:90.5 dB range, 0.5 dB resolution (182 levels),variable smooth ramp rate, 0.125 dB steps; (5)mute control pin for off-chip muting circuits; (6)on-chip anti-alias and output filters; (7)de-emphasis filters for 32, 44.1 and 48 kHz.

The absolute maximum ratings of the CS4228AKS can be summarized as:(1)power supplies digital:-0.3 to 6.0V;(2)storage temperature:-65 to 150;(3)ambient temperature (power applied):-55 to 125;(4)input current:±10mA;(5)digital input voltage,input pins:-0.7 to Vl+2.5V;(6)analog input voltage:-0.7 to VA+0.7V.The CS4228A is a 24-bit audio codec comprised of 2 analog-to-digital converters (ADC) and 6 digital-to-analog converters (DAC), all implemented using single-bit delta-sigma techniques. Other functions integrated with the codec include independent digital volume controls for each DAC, digital DAC de-emphasis filters, ADC high-pass filters, an on-chip voltage reference, and a flexible serial audio interface. All functions are configured through a serial control port operable in SPI mode and in two wire mode. Figure 5 shows the recommended connections for the CS4228A.The CS4228A contains on-chip buffer amplifiers capable of producing line level outputs. These amplifiers are biased to a quiescent DC level of approximately 2.3V. This bias, as well as variations in offset voltage, are removed using off-chip AC load coupling.