Datasheet
Maxim Integrated
│
71
MAX98090 Ultra-Low Power Stereo Audio Codec
www.maximintegrated.com
Bump/Pin Descriptions (continued)
PIN BUMP
MAX98090 FUNCTION
TQFN WLP
29 G7 DGND Digital Ground
30 E5 SDIN Digital Audio Serial Data Playback Input. The input voltage is referenced to DVDDIO.
31 G6 SDOUT Digital Audio Serial Data Record Output. The output voltage is referenced to DVDDIO.
32 F5 LRCLK
Digital Audio Left-Right Clock Input/Output. LRCLK is the audio sample rate clock and
determines whether audio data is routed to the left or right channel. In TDM mode, LRCLK
is a frame sync pulse. LRCLK is an input when the device is in slave mode and an output
when in master mode. The input voltage is referenced to DVDDIO.
33 G5 BCLK
Digital Audio Bit Clock Input/Output. BCLK is an input when the device is in slave mode
and an output when in master mode. The input/output voltage is referenced to DVDDIO.
34 F4 IRQ Active-Low Hardware Interrupt Output. Connect a 10kΩ pullup resistor to V
DD
.
35 G4 MCLK
Master Clock Input. Acceptable input frequency range is either 256 x f
S
or from 10MHz to
60MHz.
36 D3 SCL I
2
C Serial Clock Input. Connect a pullup resistor to DVDD for full output swing.
37 E2 SDA I
2
C Serial Data Input/Output. Connect a pullup resistor to DVDD for full output swing.
38 G3 HPVDD
Headphone Power Supply. Bypass to HPGND with a 10µF bulk capacitor with a parallel
0.1µF capacitor as close as possible to the device.
39 F3 C1P
Charge-Pump Flying Capacitor Positive Terminal. Connect a 1µF ceramic capacitor
between C1N and C1P.
40 F2 C1N
Charge-Pump Flying Capacitor Negative Terminal. Connect a 1µF ceramic capacitor
between C1N and C1P.
— B3, B4 SPKVDD
Speaker and Microphone Bias Power Supply. Bypass each bump to SPK_GND with a
1µF capacitor with a single shared 10µF bulk capacitor.
— C4 IN5
Auxiliary Positive Differential Microphone Input or Single-Ended Line Input. AC-couple
with a series 1µF capacitor.
— D4 IN6
Auxiliary Negative Differential Microphone Input or Single-Ended Line Input. AC-couple
with a series 1µF capacitor.
—
B2, C2,
C3, C5,
D5, E3,
E4
N.C. Not Connected Internally