RTI Technologies Model 1207, 1207A Subminature Condenser Microphone

RTI Tech
MODEL 1207, 1207A PERFORMANCE SPECIFICATION

New subminiature condenser microphones designed for sampling sound in active noise reduction systems. Frequency response is flat from 30Hz to 1 5kHz. Phase is invariant from 50Hz to 5kHz. Model 1207A can be used in high sound levels to 145dB without significant distortion using bipolar bias connection. Low self noise reduces objectional background hiss. A novel back electret and low mass diaphragm assure low sensitivity to vibration and stable aging properties. Internal RFI filter capacitors can be supplied as option "C".

MODEL 1207
Noise level («A»-weighted) (1 kHz SPL Equivalent of noise)	25 dB Nominal
Output impedance	3 kOhm (2–6kOhm)
Electrical Connection	3 solder pads on end

Supply voltage	1.3 V (1–20 V)
Distortion (1% THD)	118 dBSPL
Current drain	30 µA at 1.3V (10–60 µA)

MODEL 1207A
Bipolar bias connection with external rsistor and independant ground as per the diagram below


Supply voltage	±12 V
Distortion (1% THD)	145 dBSPL
Current drain	500 µA

Patents Granted and Pending