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TFT TV Service Manual 11/04/2006
11.8. TEA6420
11.8.1. Features
• 5 Stereo Inputs
• 4 Stereo Outputs
• Gain Control 0/2/4/6dB/Mute for each Output
• Cascadable (2 different addresses)
• Serial Bus Controlled
• Very low Noise
• Very low Distortion
11.8.2. Description
The TEA6420 switches 5 stereo audio inputs on4stereo outputs. All the switching possibilities are
changed through the I
2
C bus.
11.8.3. Pin
Connections
11.9. CS4334
11.9.1. Features
• Complete Stereo DAC System: Interpolation, D/A, Output Analog Filtering
• 24-Bit Conversion
• 96 dB Dynamic Range
• -88 dB THD+N
• Low Clock Jitter Sensitivity
• 5V Power Supply
• Filtered Line Level Outputs
• On-Chip Digital De-emphasis
• Popgaurd® Technology
• Functionally Compatible with CS4330/31/33
11.9.2. General
Description
The CS4334 family members are complete, stereo digital-to-analog output systems including
interpolation, 1-bitD/A conversion and output analog filtering in an 8-pinpackage. The CS4334/5/6/7/8/9
support all major audio data interface formats, and the individual devices differ only in the supported
interface format. The CS4334 family is based on delta-sigma modulation, where the modulator output
controls the reference voltage input to an ultra-linear analog low-pass filter. This architecture allows for
infinite adjustment of sample rate between 2 kHz and 100 kHz simply by changing the master clock
frequency. The CS4334 family contains on-chip digital de-emphasis, operates from a 5V power
supply, and requires minimal support circuitry. These features are ideal for set-top boxes, DVD players,
SVCD players, and A/V receivers.
