Inven Sense AN-000013, EV_INMP404-FX, EV_INMP405-FX, EV_INMP504-FX, EV_INMP510-FX User Manual

AN-000013

InvenSense Inc.

Wire

Microphone

Red

VDD

Power Supply. 1.5 V DC to 3.6 V DC;
White

OUTPUT

Analog Output Signal

Black

GND

Ground

Maximum

Maximum

INMP404

250 µA

0.18 V rms

200 Ω

0.8 V

INMP405

250 µA

0.18 V rms

200 Ω

0.8 V

INMP504

225 µA

0.18 V rms

200 Ω

0.8 V

INMP510

250 µA

0.40 V rms

350 Ω

0.7 V

ICS-40310

25 µA

0.12 V rms

4.5 kΩ

0.57 V

ICS-40212

165 µA

0.63 V rms

190 Ω

1.0 V

V

DD

0.1µF

OUTPUT

GND

MICROPHONE

Analog Output MEMS Microphone Flex Evaluation Board User Guide

GENERAL DESCRIPTION

This user guide applies to the following MEMS microphone
evaluation boards:

• EV_INMP404-FX

• EV_INMP405-FX

• EV_INMP504-FX

• EV_INMP510-FX

• EV_ICS-40180-FX

• EV_ICS-40181-FX

• EV_ICS-40310-FX

• EV_ICS-40212-FX

TABLE 2. MICROPHONE FUNCTIONAL
DIFFERENCES

Microphone

Supply
Current

Output
Voltage

Output
Impedance

DC
Offset

This is a simple evaluation board that allows quick evaluation
of the performance of single-ended analog MEMS
microphones. The small size and low profile of the flexible
PCB enables direct placement of the microphone into a
prototype or an existing design for an in situ evaluation. The
evaluation board consists of a bottom port microphone
soldered to a flexible PCB with color-coded wires attached.
The only other component on the board is a 0.1 μF supply
bypass capacitor.

Table 1 describes the functions of the three connection wires.
Table 2 describes the functional differences between the
different microphones that are used with this flex circuit.

TABLE 1. PIN FUNCTION DESCRIPTIONS

Color

Pin Description

(0.9 V DC to 1.3 V DC for ICS-40310)

ICS-40180 260 µA 0.40 V rms 350 Ω 0.7 V

ICS-40181 250 µA 0.40 V rms 350 Ω 0.7 V

EVALUATION BOARD CIRCUIT

Figure 1 shows the schematic of the evaluation board, and
Figure 2 shows the flex board layout. See the respective
microphone data sheets for complete descriptions and
specifications of the microphones. Note that the layout for
the EV_ICS-40181-FX differs slightly from what is shown in
Figure 2 because of this part’s different package footprint,
but the routing of the three signals is consistent.

InvenSense reserves the right to change the detail

specificatio ns as may be required to permit
improvements in the design of its products.

1745 Technology Drive, San Jose, CA 95110 U.S.A

[phone]

www.invensense.com

Figure 1. Evaluation Board Schematic

Figure 2. Evaluation Board Layout (Top View)

Document Num ber: AN-000013
Revision: 1.5
Release Date: 06/12/2017

AN-000013

3.14mm

15mm

Figure 3. Evaluation Board Dimensions in Millimeters (Wires Not

Included)

BOTTOM PORT EVALUATION BOARD

PHOTOGRAPH

Figure 4. Top and Bottom View

TOP PORT EVALUATION BOARD PHOTOGRAPH

Figure 5. Top View

Document Number: AN-00 0013
Revision: 1.5

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