Figure 4. Remote Differential Microphone Bias Network Optimizes Noise Rejection in Long-Run, PC Board Traces

2.2kΩ

1kΩ

AUX_IN

9

IN-

IN+

7

6

5

VCC

2.4V TO 5.5V

MAX4062

GND

8

G2

G1

0.1µF

0.1µF

1

10

RG

11kΩ

BIAS

VBIAS

0.1µF

0.1µF

4

x10

OUT

INT/AUX 2

3

1kΩ

VDD

2.2µF

1kΩ

1kΩ

2.2µF

1

2

3

4

8

7

6

5

AUX_IN

GND

IN-

IN+

EP*

VCC

*CONNECT EP TO GND (TDFN ONLY).

BIAS

OUT

INT/AUX

MAX4060

µMAX/TDFN

1

2

3

4

8

7

6

5

G1

GND

IN-

IN+

VCC

OUT

SHDN

G2

MAX4061

µMAX/TDFN

TOP VIEW

1

2

3

4

5

10

9

8

7

6

G1

AUX_IN

GND

IN-

BIAS

OUT

INT/AUX

G2

MAX4062

µMAX

IN+

VCC

EP*

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Analog Devices │ 13

MAX4060/MAX4061/

MAX4062

Differential Microphone Preamplifiers with

Internal Bias and Complete Shutdown

Pin Configurations