Описание
The CS4265 is a highly integrated stereo audio CODEC. The CS4265 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. A 2:1 stereo input multiplexer is included for s electing between line-level or microphone-level inputs. The microphone input path includes a +32 dB gain stage and a low noise bias voltage supply. The PGA is available for line or microphone inputs and provides gain or attenuation of ±12 dB in 0.5 dB steps. The output of the PGA is followed by an advanced 5thorder, multi-bit delta sigma modulator and digital filtering/decimation. Sampled data is transmitted by the serial audio interface at rates from 4 kHz to 192 kHz in either Slave or Master Mode. The D/A converter is based on a 4th-order multi-bit delta sigma modulator with an ultra-linear low-pass filter and offers a volume control that operates with a 0.5 dB step size. It in corporates selectable soft ramp and zero crossing transition functions to eliminate clicks and pops. Standard 50/15 µs de-emphasis is availa ble for a 44.1 kHz sample rate for compatibility with digital audio programs mastered using the 50 /15 µs pre-emphasis technique. Integrated level translators allow ea sy interfacing between the CS4265 and other devices operating over a wide range of logic levels. The CS4265 is available in a 32-pin QFN package for both Commercial (-10° to +70° C) and Automotive (-40° to +105° C) grade.
- D/A Features
- Multi-Bit Delta Sigma Modulator
- 104 dB Dynamic Range
- -90 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
- Popguard® 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
- A/D Features
- Multi-Bit Delta Sigma Modulator
- 104 dB Dynamic Range
- -95 dB THD+N
- Stereo 2:1 Input Multiplexer
- Programmable Gain Amplifier (PGA)
- ± 12 dB Gain, 0.5 dB Step Size
- Zero Crossing, Click-Free Transitions
- Pseudo-Differential Stereo Line Inputs
- 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
