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©2019, PUI Audio Inc.

PUI Audio, Inc., 3541 Stop Eight Road, Dayton, OH 45414

Tel: (937) 415-5901 Fax: (937) 415-5925

Data Sheet

PUM-5250L-C3310-R

PUI Audio’s unidirectional electret condenser microphones (ECMs)—also known

as cardioid microphones—are purpose-built to only capture sound from one

direction. Four holes on the rear of the microphone capsule focus the sweet spot

of the microphone’s 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

kΩ

Current consumption

(2VS with 2.2 kΩ RL)

500

µA

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 180°±20° at 1 kHz **On-axis 0° measurement