CS53L21

The CS53L21 is a highly integrated, 24-bit, 96 kHz, low-power stereo A/D. Based on multibit, Delta-Sigma modulation, it allows infinite sample rate adjustment between 4 kHz and 96 kHz.

The ADC CS53L21 offers many features suitable for low power, portable-system applications. The ADC input path allows independent channel control of a number of features. An input multiplexer selects between line-level or microphone-level inputs for each channel. The microphone input path includes a selectable programmable-gain pre-amplifier stage and a low noise MIC bias voltage supply. A PGA is available for line or microphone inputs and provides analog gain with soft ramp and zero cross transitions. The ADC also features a digital volume attenuator with soft ramp transitions. A programmable ALC and Noise Gate monitor the input signals and adjust the volume levels appropriately.

The Signal Processing Engine (SPE) CS53L21 controls left/right channel volume mixing, channel swap and channel mute functions. All volume-level changes may be configured to occur on soft ramp and zero cross transitions.

In addition to CS53L21's many features, the CS53L21 operates from a single, low-voltage analog and digital core power supply, making this A/D ideal for applications such as portable audio players, digital microphones, digital voice recorders, voice recognition systems and audio/video capture cards.