Specifications

Product Technical Specification & Customer Design Guidelines

56 Proprietary and Confidential - Specifications subject to change 2400058

MIC single-ended connection example

Figure 4-6: Example—MIC single-ended connection with LC filter (TBD)

Single-ended connection considerations:

• Not recommended for improving TDMA noise rejection as it is usually difficult

to eliminate TDMA noise from a single-ended design.

• Internal input resistor value becomes 1150  due to the connection of

MIC1_N to the ground.

• LC filter (L1 and C2) is recommended (but not mandatory) to eliminate TDMA

noise. If the filter is not to be used, the capacitor C2 must be removed and the

coil replaced by 0  resistors as shown in Figure 4-7 on page 56.

Figure 4-7: Example - MIC single-ended connection without an LC filter (TBD)

Capacitor C1 is highly recommended to eliminate TDMA noise and it must be

connected close to the microphone.

AirPrime SL module

Audio

ADC

MIC

MIC1_P

MIC1_N

1150 Ohm typ

100nF

1.2V typ