EV_ICS-40720-FX TDK

UG-325 Analog Output MEMS Microphone Flex Evaluation Board User Guide TABLE 2. MICROPHONE FUNCTIONAL GENERAL DESCRIPTION DIFFERENCES This user guide applies to the following MEMS microphone evaluation boards: Maximum Maximum Supply Output Output DC EV INMP404-FX Microphone Current Voltage Impedance Offset EV INMP405-FX EV INMP504-FX INMP404 250 A 0.18 V rms 200 0.8 V EV INMP510-FX INMP405 250 A 0.18 V rms 200 0.8 V EV ICS-40180-FX EV ICS-40181-FX INMP504 225 A 0.18 V rms 200 0.8 V EV ICS-40310-FX INMP510 250 A 0.40 V rms 350 0.7 V This is a simple evaluation board that allows quick evaluation ICS-40180 260 A 0.40 V rms 350 0.7 V of the performance of single-ended analog MEMS ICS-40181 250 A 0.40 V rms 350 0.7 V microphones. The small size and low profile of the flexible PCB enables direct placement of the microphone into a ICS-40310 25 A 0.12 V rms 4.5 k 0.57 V 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. EVALUATION BOARD CIRCUIT The only other component on the board is a 0.1 F supply bypass capacitor. Figure 1 shows the schematic of the evaluation board, and Figure 2 shows the flex board layout. See the respective Table 1 describes the functions of the three connection wires. microphone data sheets for complete descriptions and Table 2 describes the functional differences between the specifications of the microphones. Note that the layout for different microphones that are used with this flex circuit. the EV ICS-40181-FX differs slightly from what is shown in Figure 2 because of this parts different package footprint, but the routing of the three signals is consistent. TABLE 1. PIN FUNCTION DESCRIPTIONS V Wire Microphone DD Color Pin Description 0.1F Red VDD Power Supply. 1.5 V DC to 3.6 V DC (0.9 V DC to 1.3 V DC for ICS-40310) OUTPUT White OUTPUT Analog Output Signal MICROPHONE Black GND Ground GND Figure 1. Evaluation Board Schematic Figure 2. Evaluation Board Layout (Top View) InvenSense Inc. InvenSense reserves the right to change the detail Document Number: AN-000013 1745 Technology Drive, San Jose, CA 95110 U.S.A specifications as may be required to permit improvements +1(408) 9887339 Revision: 1.4 in the design of its products. www.invensense.com Release Date: 03/26/2015 UG-325 15mm 3.14mm 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-000013 Page 2 of 4 Revision: 1.4 Rev Date: 03/26/2015