AN‐000245
T4086 Flex EVB User Guide
GENERAL DESCRIPTION
EVALUATION BOARD CIRCUIT
The T4086 is an analog single‐ended MEMS microphone. This
user guide provides information on how to use the flexible
evaluation board for this part, EV_T4086‐FX.
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.
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.
Figure 3 shows the dimensions of the flex board and identifies
the location of the sound port.
Figure 4 shows the top and bottom views of the flex board.
VDD
0.1µF
OUTPUT
Table 1 describes the functions of the three connection wires.
Table 2 describes the performance specifications of the
microphone flex board.
MICROPHONE
GND
TABLE 1. PIN FUNCTION DESCRIPTIONS
Figure 1. EV_T4086‐FX Schematic
Wire
Color
Microphone
Pin
Description
Red
VDD
Power Supply. 1.6 V DC to 3.6 V DC
White OUTPUT
Analog Output Signal
Black
Ground
GND
Figure 2. EV_T4086‐FX Layout (Top View)
TABLE 2. MICROPHONE PERFORMANCE
SPECIFICATIONS
15mm
1.27mm
Sensitivity
‐38 dBV +/‐
1
Maximum Maximum
Supply
Output
Output
Current
Voltage Impedance
140 µA
0.63
Vrms
1.52mm
DC
Offset
0.74 V
Figure 3. EV_T4086‐FX Dimensions in Millimeters (Wires Not
Included)
Figure 4. EV_T4086‐FX Top and Bottom View
TDK, Inc. reserves the right to change the detail
specifications as may be required to permit
improvements in the design of its products.
250 Ω
3.14mm
TDK Corporation
1745 Technology Drive, San Jose, CA 95110 U.S.A
+1(408) 988–7339
www.tdk.com
Document Number: AN‐000245
Revision: 1.0
Release Date: 10/20/2020
AN‐000245
REVISION HISTORY
REVISION
DATE
REVISION
DESCRIPTION
10/20/2020
1.0
Initial release
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Document Number: AN‐000245
Revision: 1.0
AN‐000245
COMPLIANCE DECLARATION DISCLAIMER
TDK believes the environmental and other compliance information given in this document to be correct but cannot guarantee
accuracy or completeness. Conformity documents substantiating the specifications and component characteristics are on file. TDK
subcontracts manufacturing, and the information contained herein is based on data received from vendors and suppliers, which has
not been validated by TDK.
This information furnished by TDK, Inc. (“TDK”) is believed to be accurate and reliable. However, no responsibility is assumed by TDK for its use, or for any infringements
of patents or other rights of third parties that may result from its use. Specifications are subject to change without notice. TDK reserves the right to make changes to
this product, including its circuits and software, in order to improve its design and/or performance, without prior notice. TDK makes no warranties, neither expressed
nor implied, regarding the information and specifications contained in this document. TDK assumes no responsibility for any claims or damages arising from information
contained in this document, or from the use of products and services detailed therein. This includes, but is not limited to, claims or damages based on the infringement
of patents, copyrights, mask work and/or other intellectual property rights.
Certain intellectual property owned by TDK and described in this document is patent protected. No license is granted by implication or otherwise under any patent or
patent rights of TDK. This publication supersedes and replaces all information previously supplied. Trademarks that are registered trademarks are the property of their
respective companies. TDK sensors should not be used or sold in the development, storage, production or utilization of any conventional or mass‐destructive weapons
or for any other weapons or life threatening applications, as well as in any other life critical applications such as medical equipment, transportation, aerospace and
nuclear instruments, undersea equipment, power plant equipment, disaster prevention and crime prevention equipment.
©2020 TDK. All rights reserved. TDK, MotionTracking, MotionProcessing, MotionProcessor, MotionFusion, MotionApps, DMP, AAR, and the TDK logo are trademarks
of TDK, Inc. The TDK logo is a trademark of TDK Corporation. Other company and product names may be trademarks of the respective companies with which they are
associated.
©2020 TDK. All rights reserved.
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Document Number: AN‐000245
Revision: 1.0
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