GENERAL DESCRIPTION
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 fea tures suitable for low power, portable system applications.

FEATURES
♦ 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

SYSTEM FEATURES
♦ 24-bit Conversion
♦ 4 kHz to 96 kHz Sample Rate
♦ Multi-bit Delta Sigma Architecture
♦ Low Power Operation
   – Stereo Record (ADC): 8.72 mW @ 1.8 V
   – Stereo Record (MIC to PGA and ADC): 13.73 mW @ 1.8 V
♦ Variable Power Supplies
   – 1.8 V to 2.5 V Digital & Analog
   – 1.8 V to 3.3 V Interface Logic
♦ Power Down Management
   – ADC, MIC Pre-Amplifier, PGA
♦ Software Mode (I²C® & SPI™ Control)
♦ Hardware Mode (Stand-Alone Control)
♦ Flexible Clocking Options
   – Master or Slave Operation
♦ Digital Routing Mixes
   – Mono Mixes

APPLICATIONS
♦ Portable Audio Players
♦ Digital Microphones
♦ Digital Voice Recorders
♦ Voice Recognition Systems
♦ Audio/Video Capture Cards