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LC78835K Datasheet, PDF (7/14 Pages) Sanyo Semicon Device – 18 Bits Digital Filter and D/A Converter for Digital Audio | |||
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LC78835K, 78835KM
For further details concerning filter characteristics when de-emphasis is on, refer to page 13.
â De-emphasis on/off
De-emphasis on: EMP pin = âHâ
De-emphasis off: EMP pin = âLâ
â Selection of filter coefficient
FS1
L
H
H
L
FS2
L
L
H
H
fs
44.1 kHz
32 kHz 48 kHz
⢠Soft Mute
Soft muting is performed using the built-in digital attenuator. The attenuation amount of the attenuator circuit is as
follows:
20 log (ATT/256) dB
Although ATT = 0 to 256, when ATT = 0, attenuation sets to â â. If the MUTE pin is set to âHâ level, ATT
approaches 0 in single-decreasing increments and the attenuation changes towards â â. On the other hand, when
the MUTE pin is set to the âLâ level, ATT approaches 256 in single-increasing increments and the attenuation
amount changes to approach 0. The approximate speed during soft mute is 1024/fs.
⢠Noise Shaper
In order to reduce noise during DF arithmetic output requantization, the first-order noise shaper is utilized.
⢠Double-Rate Support
When the D/N pin is set to âHâ level, CD high-speed playback is supported. At this time, BCLK, LRCK and
DATA are input at double the frequency of normal operating times. The system clock operates at 384 fs and with
a clock speed of 512 fs, double-rate is supported. Note that test mode is enabled for clock speeds of 392 fs and
448fs and double-rate is not supported.
Normal-rate mode: D/N pin = âLâ
Double-rate mode: D/N pin = âHâ
No. 4624-7/14
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