lc78835km Sanyo Semiconductor Corporation, lc78835km Datasheet - Page 10

• Manufacturer Part Number: lc78835km
• Description: 18 Bits Digital Filter And D/a Converter For Digital Audio
• Manufacturer: Sanyo Semiconductor Corporation

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 (=2
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.
LC78835K, 78835KM
9
) unit resistors (R) connected in series so that a potential applied to
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