LC78834 View Datasheet(PDF) - SANYO -> Panasonic

Part Name

Description

View to exact match

LC78834

Stereo 18-bit Digital Audio D/A Converter with On-Chip 4 fs Digital Filters

SANYO -> Panasonic 

LC78834M

• Soft mute

The soft muting function uses the built-in digital attenuator.

The following formula gives the attenuation.

20 · log (ATT/256) dB

The ATT parameter is an integer between 0 and 256. However, note that the attenuation will be –∞ when ATT

is zero.

When the MUTE pin is set to the high level, one is subtracted from the ATT parameter repeatedly moving it

towards zero thus changing the attenuation towards –∞. Inversely, when the MUTE pin is set to the high level, one

is added to the ATT parameter repeatedly moving it towards 256 thus changing the attenuation towards unity. The

time required for the soft mute function to operate is about 1024/fs.

2. Initialization

The LC78834M must be initialized when power is first applied and when the system clock is switched.

The LC78834M is initialized by setting the INITB pin to the low level. The required length of this initial low level

period is defined as follows. Once the power supply has stabilized, input the XIN, BCLK and LRCK signals. The

low level on the INITB pin must be held until at least one full cycle of the LRCK signal has completed, as shown in

the figure.

No. 4838-7/14

Share Link: