This document contains data proprietary to PUI Audio Inc. Any use or reproduction, in any form, without prior written permission of PUI Audio Inc. is prohibited. 2019, PUI Audio Inc. Data Sheet PUM-5250L-C3310-R PUI Audios unidirectional electret condenser microphones (ECMs)also known as cardioid microphonesare purpose-built to only capture sound from one direction. Four holes on the rear of the microphone capsule focus the sweet spot of the microphones polar pattern to directly in front of the microphone. Excellent for use in recording a single acoustic source, unidirectional microphones are great as boom microphones to record sound at distance, rejecting unwanted noise, or are used in pairs for two-channel stereo recording. Features: 6mm diameter 5mm height -50 dB sensitivity 50cm >55 dB signal-to-noise ratio Cardioid shaped polar pattern for focused acoustic pickup Integrated 33pF and 10pF buzz-blocking capacitors reduce GSM noise Specifications Parameters Values Units Sensitivity (1 kHz 50cm) 0 dB=1V/Pa -50 4 dB Rated Voltage 2 VDC Output Impedance ( 1 kHz) 0.68 k Current consumption (2VS with 2.2 k RL) 500 A Signal-to-Noise Ratio (1kHz, 94 dB input, A-weighted) >55 dB Decreasing Voltage (2VS to 1.5VS) -3 dB Frequency Range ( 50cm, -10 dB) 20 ~ 20,000** Hz Operating Voltage Range 1 ~ 10 VDC Maximum SPL Input (THD<3%) 110 dB Directivity* Unidirectional - Operating Temperature -20 ~ +60 C Storage Temperature -40 ~ +70 C Weight <0.3 Grams *Minimum -12 dB drop in output at 18020 at 1 kHz **On-axis 0 measurement PUI Audio, Inc., 3541 Stop Eight Road, Dayton, OH 45414 Tel: (937) 415-5901 Fax: (937) 415-5925 This document contains data proprietary to PUI Audio Inc. Any use or reproduction, in any form, without prior written permission of PUI Audio Inc. is prohibited. 2019, PUI Audio Inc. Measurement Method (in Anechoic Chamber) Typical Frequency Response (measured at 50cm with 2V input and 94 dB source) Red = 0 frequency response measurement, Blue = 180 off-axis frequency response measurement Typical Frequency Response at 0 Vs 180 PUI Audio, Inc., 3541 Stop Eight Road, Dayton, OH 45414 Tel: (937) 415-5901 Fax: (937) 415-5925