Datasheet

Maxim Integrated │ 133
MAX98090 Ultra-Low Power Stereo Audio Codec
www.maximintegrated.com
Table 59. Receiver and Left Line Output Mixer Gain Control Register
Table 60. Receiver and Left Line Output Volume Control Register
Line Output Mixer and Gain Control
When configured as a stereo single-ended line output, the
left and right configuration registers can be programmed
independently. Each channel mixer can be configured
to accept any combination of signals from the playback
DAC, the analog microphone amplifiers, and the line input
drivers (Tables 58 and 61). The input mixers also provide
several attenuation options (Tables 59 and 62). The mixer
attenuation options of -6dB, -9.5dB, and -12dB are sized
to prevent clipping when several full-scale input sources
are selected.
The left and right line output drivers are independent
programmable gain amplifiers (PGAs) capable of driv-
ing high impedance ground referenced loads. The line
output PGAs have a wide volume adjustment range from
-62dB to +8dB, provide a high attenuation mute control
(Tables 60 and 63), and feature programmable click and
pop reduction options. See the Click-and-Pop Reduction
section for details. The output common-mode voltage is
either half of V
AVDD
(in resistive divider BIAS mode) or
about 0.78V (in bandgap BIAS mode). As a result of the
internal architecture, the left and right channel each have
a built in baseline gain of -3dB (when all programmable
gain options are set to 0dB).
ADDRESS: 0x38
DESCRIPTION
BIT NAME TYPE POR
7 — — — —
6 — — — —
5 — — — —
4 — — — —
3 — — — —
2 — — — —
1
MIXRCVLG[1:0] R/W
0
Receiver/Line Output Left Mixer Gain Conguration
00: 0dB 10: -9.5dB
01: -6dB 11: -12dB
0 0
ADDRESS: 0x39
DESCRIPTION
BIT NAME TYPE POR
7 RCVLM R/W 0
Left Receiver/Line Output Mute
0: Left output amplier not muted.
1: Left output amplier is muted.
6 — — — —
5 — — — —
4
RCVLVOL[4:0] R/W
1
Receiver/Line Output Left PGA Volume Conguration
3 0
0x1F: +8dB
0x1E: +7.5dB
0x1D: +7dB
0x1C: +6.5dB
0x1B: +6dB
0x1A: +5dB
0x19: +4dB
0x18: +3dB
0x17: +2dB
0x16: +1dB
0x15: +0dB
0x14: -2dB
0x13: -4dB
0x12: -6dB
0x11: -8dB
0x10: -10dB
0x0F: -12dB
0x0E: -14dB
0x0D: -17dB
0x0C: -20dB
0x0B: -23dB
0x0A: -26dB
0x09: -29dB
0x08: -32dB
0x07: -35dB
0x06: -38dB
0x05: -42dB
0x04: -46dB
0x03: -50dB
0x02: -54dB
0x01: -58dB
0x00: -62dB
2 1
1 0
0 1