RTI Tech
MODEL 2740C PERFORMANCE SPECIFICATION
New subminiature transducers for
applications demanding the ultimate in vibration immunity and ultra small size such as
hearing aids worn in the ear. This is the Zero G line which incorporates a novel diaphragm
construction which reduces interference caused by mechanical vibration. The wide frequency
range permits improved voice intelligibility and an internal preamp faci litates
applications. An internal filter provides highly efficient RFI suppression for GSM phones.
Supply voltage |
1.3 V (0.9-3V) |
| Current drain at 1.3 V |
30µA (10–50 µA) |
| Output impedance at 1.3 V |
3 kOhm (2–6 kOhm) |
Noise level («A» -weighted)
(l kHz equivalent SPL) |
24 dB (28 dB Max) |
Sensitivity to vibration
(1 kHz equivalent SPL) |
66 dB per g |
| Sensitivity
(dBV) |
| Frequency |
min |
nom |
max |
|
| 100 Hz |
|
-61 |
|
| 1000 Hz |
-57 |
- 54 |
-51 |
| » 5000 Hz |
|
- 49.5 |
|
|
Device conformity range of deviation from 1 kHz |
|
| 100 Hz |
-11 dB |
to |
-4 dB |
| 1000 Hz |
0 dB |
|
0 dB |
| » 5000 Hz |
+1.5 dB |
to |
+7.5 dB |
|
| Patented under US
4,764,690 and others pending |
|
 |
DIMENSIONS
IN MM (INCHES) |
| |
 |
|
