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Digital to Analog Converter (DAC) PCB The intended use is for the evaluation and test of the Knowles Electronics line of MEMS Digital PDM (Pulse Density Modulation) microphones. This board is designed to support R&D activities, and is not intended for qualification or production test use. The DAC PCB provides the interface circuitry for two digital microphones. Power is provided via a standard 2.5mm power jack. A 3.5mm stereo headphone jack is available for quick verification of audio output. Note: Please reference Knowles Application Note – MEMS Digital Microphone Evaluation Board: SP-703 for more information. 3.5mm Headphone Jack 6-Pin Edge Connector 2.5mm Power Supply Jack Input Voltage: 100-240V ~0.4A, 50-60Hz Output Voltage: +12V DC@1A Figure 1 SiSonic™ FLEX Evaluation Kit KAS-33100-001 USER GUIDE © 2012 Knowles Electronics 2www.knowles.com

Digital & Analog Adapter PCBs

  • The digital and analog adapters are for both analog and digital microphones. Note: See the product datasheet for specifications: http://www.knowles.com/search/product.htm?x_sub_cat_id=3
  • Analog microphones will need to be powered and connected externally. (See Page 8) Figure 2 SiSonic™ FLEX Evaluation Kit KAS-33100-001 USER GUIDE © 2012 Knowles Electronics 3www.knowles.com Front Back

SiSonic™ FLEX Evaluation Kit KAS-33100-001 USER GUIDE © 2012 Knowles Electronics 4www.knowles.com Closed State Open State

Table 1. Digital Pin Function Descriptions Digital FLEX PCBs Digital Models (2 each) 1.SPK0833LM4H 2.SPM1423HM4H Symbol Description GND Ground SEL Select CLK Clock DAT Data VDD Power GND Ground SiSonic™ FLEX Evaluation Kit KAS-33100-001 USER GUIDE © 2012 Knowles Electronics 5www.knowles.com Analog FLEX PCBs Analog Models (2 each) 3.SPQ0410HR5H 4.SPA2410LR5H 5.SPU0410LR5H Symbol Description GND Ground OUT Output VDD Power GND Ground Table 2. Analog Pin Function Descriptions

Installation Steps (Digital) To listen to the output of the Mic-On-Flex Assemblies with a headset, follow the steps below. 1. C onnect one digital FLEX PCB Assembly to an Adapter PCB. The edge c onnectors must be visible. (Figure 4) Note: The FLEX PCBs must be inserted when the Adapter PCBs are in the “open” orientation (Figure 3, Page 4). Figure 4 SiSonic™ FLEX Evaluation Kit KAS-33100-001 USER GUIDE © 2012 Knowles Electronics 6www.knowles.com

  1. Connect at least one Adapter PCB to the 6-pin edge connector. For mono use, either of the two 6-pin edge connectors can be used. (Figure 1). Note: DAC PCB can only be used with digital microphones. Analog microphones will not operate. 3. Insert a power supply plug jack (not included) into to the DAC PCB (Figure 1). a.Input Voltage: 100-240V ~0.4A, 50-60Hz b.Output Voltage: +12V DC@1A Mono Stereo Figure 5 SiSonic™ FLEX Evaluation Kit KAS-33100-001 USER GUIDE © 2012 Knowles Electronics 7www.knowles.com

SiSonic™ FLEX Evaluation Kit KAS-33100-001 USER GUIDE © 2012 Knowles Electronics 8www.knowles.com Installation Steps (Analog) To access the output of the Mic-On-Flex Assemblies, follow the steps below. 1. C onnect one of the three Analog FLEX PCB Assemblies to an Adapter PCB (Figure 4). 2. S older wires to Power (P), Output (O) and Ground (G) Pins of the Adapter PCB ( Figure 6). The output of the microphone is mic level. An amplifier will be needed t o bring to line level. 3. C onnect the soldered wires to the appropriate equipment. See the product d atasheet for specifications: www.knowles.com/search/product.htm?x_sub_cat_id=3 Figure 6 The information contained in this literature is based on our experience to date and is believed to be reliable and it is subject to change without notice. It is intended as a guide for use by persons having technical skill at their own discretion and risk. We do not guarantee favorable results or assume any liability in connection with its use. Dimensions contained herein are for reference purposes only. This publication is not to be taken as a license to operate under, or recommendation to infringe any existing patents. This supersedes and voids all previous literature.