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. 2017, PUI Audio Inc. Data Sheet ROM-2235L-HD-R PUI Audios all-new HD Series microphones use premium-grade FETs and diaphragms for high sensitivity and superior signal-to-noise ratio. Each microphone features GSM buzz-blocking capacitors. Upgrade the ECM microphone that you use today with a PUI Audio HD Series microphone. The 5.8mm diameter ROM-2235L-HD-R is designed for extreme fidelity in a compact housing with true 20 Hz to 20 kHz performance. Features: 5.8mm diameter 2.7mm height -35 dB sensitivity 68 dB signal-to-noise ratio True 20 Hz to 20 kHz performance Specifications Parameters Values Units Sensitivity (1 kHz 50cm) 0 dB=1V/Pa -35 3 dB Rated Voltage 3 VDC Output Impedance ( 1 kHz) 2.2 k Current consumption (3VS with 2.2 k RL) 500 A Signal-to-Noise Ratio (1kHz, 94 dB input, A-weighted) 68 dB Decreasing Voltage (3VS to 2VS) -3 dB Frequency Range 20 ~ 20,000 Hz Operating Voltage Range 1 ~ 10 VDC Maximum SPL Input (THD<3%) 110 dB Directivity Omni-directional - PUI Audio, Inc. A Projects Unlimited Company, 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. 2017, PUI Audio Inc. Specifications (continued) Operating Temperature -20 ~ +70 C Storage Temperature -40 ~ +85 C Weight <0.5 Grams Measurement Method (in Anechoic Chamber) Typical Frequency Response (measured at 50cm with 3V input and 94 dB source) PUI Audio, Inc. A Projects Unlimited Company, 3541 Stop Eight Road, Dayton, OH 45414 Tel: (937) 415-5901 Fax: (937) 415-5925