CS4245(2004) 数据手册 ( 数据表 ) - Cirrus Logic

General Description
   The CS4245 is a highly integrated stereo audio CODEC. The CS4245 performs stereo analog-to-digital (A/D) and digital-to-analog (D/A) conversion of up to 24-bit serial values at sample rates up to 192 kHz.

D/A Features
● Multi-bit Delta Sigma modulator
● 105 dB dynamic range
● -95 dB THD+N
● Up to 192 kHz sampling rates
● Single-ended analog architecture
● Volume control with soft ramp
   – 0.5 dB step size
   – Zero crossing click-free transitions
● PopguardTM Technology
   – Minimizes the effects of output transients
● Filtered line level outputs
● Selectable serial audio interface formats
   – Left justified up to 24-bit
   – I²S up to 24-bit
   – Right justified 16, 18, 20 and 24-bit
● Selectable 50/15 µs de-emphasis
● Control Output for External Muting

A/D Features
● Multi-bit Delta Sigma modulator
● 105 dB dynamic range
● -95 dB THD+N
● Stereo 6:1 Input Multiplexer
● Programmable Gain Amplifier (PGA)
   – +/- 12 dB gain, 0.5 dB step size
   – Zero crossing, click-free transitions
● Stereo microphone inputs
   – +32 dB gain stage
   – Low noise bias supply
● Up to 192 kHz sampling rates
● Selectable serial audio interface formats
   – Left justified up to 24-bit
   – I²S up to 24-bit
● High pass filter or DC offset calibration

System Features
● Direct interface with 1.8 V to 5 V logic levels
● Optional asynchronous serial port operation
   – Each serial port supports master or slave operation
● Selectable auxiliary analog output
   – Allows analog monitoring of either the ADC
      input signal after PGA or DAC output signal
● Internal digital loopback
● Power down mode
   – Available for A/D, D/A, CODEC, Mic
     reamplifier
● +3.3 V to +5 V analog power supply
● +3.3 V to +5 V digital power supply
● Supports I²C and SPI control port interfaces
● Pin-compatible with CS5345