Datasheet

Maxim Integrated │ 70
MAX98090 Ultra-Low Power Stereo Audio Codec
www.maximintegrated.com
Bump/Pin Descriptions
PIN BUMP
MAX98090 FUNCTION
TQFN WLP
1 G1 HPGND Headphone Ground
2 G2 CPVSS Inverting Charge-Pump Output. Bypass to HPGND with a 1µF ceramic capacitor.
3 F1 CPVDD Noninverting Charge-Pump Output. Bypass to HPGND with a 1µF ceramic capacitor.
4 E1 HPL Left-Channel Headphone Output
5 D2 HPSNS
Headphone Amplier Ground Sense. Connect to the headphone jack ground terminal or
connect to ground.
6 D1 HPR Right-Channel Headphone Output
7 B5 JACKSNS
Jack detection Input. Connect to the microphone terminal of the headset jack to detect
jack activity.
8 C1 RCVP/LOUTL Positive Earpiece Amplier Output/Left Line Output
9 B1 RCVN/LOUTR Negative Earpiece Amplier Output/Right Line Output
10 A1 SPKRGND Right Speaker Amplier Ground
11 A2 SPKRN Negative Right-Channel Class D Speaker Output
12 A3 SPKRP Positive Right-Channel Class D Speaker Output
13 — SPKRVDD
Right Speaker Power Supply. Bypass to SPKRGND with a 1µF capacitor and a single
10µF bulk capacitor shared with SPKLVDD.
14 — SPKLVDD
Left Speaker and Microphone Bias Power Supply. Bypass to SPKLGND with a 1µF
capacitor and a single 10µF bulk capacitor shared with SPKRVDD.
15 A5 SPKLN Negative Left-Channel Class D Speaker Output
16 A4 SPKLP Positive Left-Channel Class D Speaker Output
17 A6 SPKLGND Left Speaker Amplier Ground.
18 B7 IN2/DMC
Negative Differential Microphone 1 Input or single-ended Line Input 2. AC-couple with a
series 1µF capacitor. Can be retasked as a digital microphone clock output.
19 A7 IN1/DMD
Positive Differential Microphone 1 Input or single-ended Line Input 1. AC-couple with a
series 1µF capacitor. Can be retasked as a digital microphone data input.
20 B6 IN3
Positive Differential Microphone 2 Input or single-ended Line Input 3. AC-couple with a
series 1µF capacitor.
21 C6 IN4
Negative Differential Microphone 2 Input or single-ended Line input 4. AC-couple with a
series 1µF capacitor.
22 C7 MICBIAS
Low-Noise Microphone Bias Voltage Output. Bypass to SPKLGND with a 1µF capacitor.
The bias voltage is programmable. An external resistor in the 2.2kΩ to 1kΩ range should
be used to set the microphone current.
23 D6 REF Converter Reference. Bypass to AGND with a 2.2µF capacitor.
24 E6 BIAS Common-Mode Reference Voltage. Bypass to AGND with a 1µF capacitor.
25 D7 AGND Analog Ground.
26 E7 AVDD Analog Power Supply. Bypass to AGND with a 1µF capacitor.
27 F7 DVDD Digital Power Supply. Bypass to DGND with a 1µF capacitor.
28 F6 DVDDIO Digital Audio Interface Power-Supply Input. Bypass to DGND with a 1µF capacitor.