ADC Dual Delta-Sigma 96ksps 24-Bit Serial 32-Pin LQFN Rail

The CS53L21 is a highly integrated, 24-bit, 96 kHz, low power stereo A/D. Based on multi-bit, delta-sigma modulation, it allows infinite sample rate adjustment between 4 kHz and 96 kHz. The ADC 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) 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. The CS53L21 is available in a 32-pin QFN package in both Commercial (-10 to +70° C) and Automotive grades (-40 to +85° C). The CDB53L21 Customer Demonstration board is also available for device evaluation and implementation suggestions. In addition to its many features, the CS53L21 operates from a low-voltage analog and digital core, making this A/D ideal for portable systems that require extremely low power consumption in a minimal amount of space.

• 98 dB Dynamic Range (A-wtd)
• -88 dB THD+N
• Analog Gain Controls
  • +32 dB or +16 dB MIC Pre-Amplifiers
  • Analog Programmable Gain Amplifier (PGA)
• +20 dB Digital Boost
• Programmable Automatic Level Control (ALC)
  • Noise Gate for Noise Suppression
  • Programmable Threshold and Attack/Release Rates
• Independent Left/Right Channel Control
• Digital Volume Control
• High-Pass Filter Disable for DC Measurements
• Stereo 3:1 Analog Input MUX
• Dual MIC Inputs
  • Programmable, Low Noise MIC Bias Levels
  • Differential MIC Mix for Common Mode Noise Rejection
• Very Low 64 Fs Oversampling Clock Reduces Power Consumption