Datasheet

MAX9880A
Low-Power, High-Performance
Dual I
2
S Stereo Audio Codec
42 ______________________________________________________________________________________
Digital Gain Control
The MAX9880A includes gain adjustment for the play-
back and record paths. Independent gain adjustment is
provided for the two record channels. Sidetone gain
adjustment is also provided to set the sidetone level rel-
ative to the playback level.
REGISTER B7 B6 B5 B4 B3 B2 B1 B0
REGISTER
ADDRESS
(SEE NOTE)
LEVEL CONTROL
Sidetone DSTS 0 DVST 0x15
Stereo DAC Level 0 SDACM 0 0 SDACA 0x16
Voice DAC Level 0 VDACM VDACG VDACA 0x17
Left ADC Level 0 0 AVLG AVL 0x18
Right ADC Level 0 0 AVRG AVR 0x19
BITS FUNCTION
DSTS
Digital Sidetone Source Mixer
00 = No sidetone selected.
01 = Left ADC
10 = Right ADC
11 = Left and right ADC
Digital Sidetone Level Control. All gain settings are relative to the ADC input voltage.
Differential Headphone Output Mode
SETTING GAIN (dB) SETTING GAIN (dB) SETTING GAIN (dB)
0x00 Off 0x0B -20 0x16 -42
0x01 0 0x0C -22 0x17 -44
0x02 -2 0x0D -24 0x18 -46
0x03 -4 0x0E -26 0x19 -48
0x04 -6 0x0F -28 0x1A -50
0x05 -8 0x10 -30 0x1B -52
0x06 -10 0x11 -32 0x1C -54
0x07 -12 0x12 -34 0x1D -56
0x08 -14 0x13 -36 0x1E -58
0x09 -16 0x14 -38 0x1F -60
0x0A -18 0x15 -40 — —
Capacitorless and Single-Ended Headphone Output Mode
SETTING GAIN (dB) SETTING GAIN (dB) SETTING GAIN (dB)
0x00 Off 0x0B -25 0x16 -47
0x01 -5 0x0C -27 0x17 -49
0x02 -7 0x0D -29 0x18 -51
0x03 -9 0x0E -31 0x19 -53
0x04 -11 0x0F -33 0x1A -55
0x05 -13 0x10 -35 0x1B -57
0x06 -15 0x11 -37 0x1C -59
0x07 -17 0x12 -39 0x1D -61
0x08 -19 0x13 -41 0x1E -63
0x09 -21 0x14 -43 0x1F -65
DVST
0x0A -23 0x15 -45 — —
Table 12. Digital Gain Registers
Grayed boxes = Not used.
Note: Register addresses listed are for I
2
C. To get the SPI address, add 0x200 with the following exception: Register 0xFF is not
accessible through SPI.