DA7210 datasheet(36/119 Pages) RENESAS

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DA7210

Ultra-low power stereo codec

Datasheet

Revision 3.2

23-Dec-2021

CFR0011-120-00 Rev 5

36 of 118

A stereo to mono conversion can either be realised by the input or the output mixer. This allows

direct feeding of phone earpiece receivers, high power speaker amplifiers and other mono devices

with the complete audio content. Unused channels of the stereo line out can be switched off to

reduce power consumption using OUT1_L_EN (address 0x1E, Table 71) and OUT1_R_EN (address

0x1F, Table 72). The mixer allows listening to mono signals like baseband or Bluetooth voice also at

both channels of stereo headphones.

Each differential channel of OUT1 can alternatively be individually configured to be single ended via

OUT1_L_SE (address 0x1E, Table 71) and OUT1_R_SE (address 0x1F, Table 72). Typical earpiece

receivers with an impedance > 32

Ω can be driven directly in differential mode at all outputs. This

amplifier offers individual programmable volume control from +15 dB to –54 dB in 1.5 dB steps, then

mute for steps below -54 dB using controls OUT1_L_VOL (address 0x1E, Table 71) and

OUT1_R_VOL (address 0x1F, Table 72). For smooth volume changes, the gain update can be

synchronised to zero-crossing of the signal using OUTZX_L_EN and OUTZX_R_EN (address 0x24,

Table 77). If no zero-crossing is detected within 2048 sample periods, the gain change is applied

unconditionally. The left and right channels are synchronised independently.

The differential AUX2 and the line output OUT2 provide a separate voice link like required to support

analogue audio of baseband modules used in smart or VoIP phones. OUT2 is enabled via OUT2_EN

(Address 0x20, Table 73) and is able to select via OUT2_OUTMIX_R/OUT2_OUTMIX_L either the

left or right channel of the output mixer or via OUT2_IN_R/OUT2_IN_L(Address 0x20, Table 73) a

signal from the input mixer. The gain is adjusted via control OUT2_VOL (Address 0x20, Table 73).

DA7210 Datasheet(PDF) 36 Page - Renesas Technology Corp