Datasheet

MAX9860
16-Bit Mono Audio Voice Codec
13
Maxim Integrated
Pin Description
PIN NAME FUNCTION
1 MICBIAS
Microphone Bias. +1.55V microphone bias for internal and/or external microphone. An external resistor from
2.2kΩ to 470Ω should be used to set the microphone current. Bypass to MICGND with a 1µF capacitor.
2 REG Internal Bias. PREG/2 voltage reference. Bypass to AGND with a 1µF capacitor (+0.8V).
3 PREG Positive Internal Regulated Supply. Bypass to AGND with a 1µF capacitor (+1.6V).
4 REF Converter Reference (1.23V). Bypass to AGND with a 2.2µF capacitor.
5 AGND Analog Ground
6 AVDD Analog Power Supply. Bypass to AGND with 10µF and 0.1µF capacitors.
7 OUTP Positive Headphone Output
8 OUTN Negative Headphone Output
9 SDA I
2
C Serial-Data Input/Output
10 SCL I
2
C Serial-Data Clock
11 DVDDIO Digital Interface Power Supply. Supply for digital audio interface. Bypass to DGND with a 1µF capacitor.
12 DGND Digital Ground
13 DVDD Digital Core Power Supply. Bypass to DGND with a 1µF capacitor.
14 MCLK Master Clock Input
15 SDOUT Serial Audio Interface ADC Data Output
16 SDIN Serial Audio Interface DAC Data Input
17 LRCLK Serial Audio Interface Left/Right Clock
18 BCLK Serial Audio Interface Bit Clock
19 IRQ Interrupt Request. IRQ is an active-low open drain output. Pull up to DVDDIO with a 10kΩ resistor.
20 MICRN
Negative Right Microphone Input. AC-couple to low-side of microphone or connect to negative signal.
AC-couple to ground for single-ended operation.
21 MICRP
Positive Right Microphone Input. AC-couple to high-side of microphone or connect to positive signal.
AC-couple the signal for single-ended operation.
22 MICLN
Negative Left Microphone Input. AC-couple to low-side of microphone or connect to negative signal.
AC-couple to ground for single-ended operation.
23 MICLP
Positive Left Microphone Input. AC-couple to high-side of microphone or connect to positive signal.
AC-couple the signal for single-ended operation.
24 MICGND MICBIAS Ground. Connect to AGND.
— EP Exposed Pad. Connect to AGND.