ADMP421

Rev. 0 | Page 6 of 16

PIN CONFIGURATION AND FUNCTION DESCRIPTIONS

1

2

3

CLK

L/R SELECT

GND

DATA

5

Figure 4. Pin Configuration (Bottom View)

Table 5. Pin Function Descriptions

Pin No.

Mnemonic

Description

1

CLK

Clock Input to Microphone.

2

L/R SELECT

Left Channel or Right Channel Select.

DATA1 (right): L/R SELECT tied to GND.

3

GND

Ground.

4

Power Supply. For best performance and to avoid potential parasitic artifacts, placing a 0.1 μF (100 nF) ceramic type

as close to Pin 4 as possible.

5

DATA

Digital Output Signal (DATA1, DATA2).