PCM63P internal function circuit diagram

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Memory chip

PCM63P is an ultra-low distortion 20-bit precision DAC chip produced by BB using a unique dual DAC collinear structure. This structure eliminates unwanted digital-to-analog interference errors and nonlinearities near other bipolar zeros. Therefore, PCM63P has very low noise, maximum SNR of 116dB and 16 times oversampling rate and fast settling time. Current output 2mA steps The jump time is 200ns. The following are the main features of PCM63P: 1, is a collinear 20-bit audio DAC; 2, can be close to ideally working at low level; 3, output numerous analog-mode inductive interference; 4, fast (200ns) current output (±2ms); 5, serial input interface with industry standard; 6, ultra-low distortion, maximum -96dB (no external adjustment); this new complementary linear structure used by PCM63P is also called dual DAC collinear structure, The structure can leave the zero point in a small step in both directions, thereby avoiding any erroneous operation or "large" linearity error while providing an absolute value current output. The low-level performance of the PCM63P ensures its 20-bit accuracy, especially near the critical bipolar zero. In the PCM63P chip, the serial data input bit of the DAC is triggered on the rising edge of the clock CLK, and the serial to parallel data conversion of the DAC is performed on the falling edge of the enable signal LE.