LC78835 View Datasheet(PDF) - SANYO -> Panasonic

Part Name

Description

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LC78835

18 Bits Digital Filter and D/A Converter for Digital Audio

SANYO -> Panasonic 

LC78835K, 78835KM

5. Digital-to-Analog (D/A) Converter

These chips have built-in output operational amplifiers which use two independent on-chip D/A converters for CH1

and CH2. Both use dynamic level shift, combining resistance strings (R-string D/A conversion), pulse-width

modulation (PWM D/A conversion) and level shift D/A conversion modes. (See figure below.)

• Resistance String (R-string) D/A Converter

This 9-bit D/A converter circuit has 512 (=29) unit resistors (R) connected in series so that a potential applied to

both ends is subjected to 512-way division. The two adjoining potentials V2 and V1 of the divided potentials

corresponding to the values of the 9 MSBs of data (D15 to D9) are sent via a switching circuit to the PWM D/A

converter. At this point, V2 – V1 = (VH – VL)/512.

No. 4624-10/14

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