PartNumber | BT-21752-000 | BT-21751-000 | BT-21754-000 |
Description | Microphones | Microphones | Microphones |
Manufacturer | Knowles | Knowles | Knowles |
Product Category | Microphones | Microphones | Microphones |
Series | BT | BT | BT |
Type | Electret Condenser | Electret Condenser | Electret Condenser |
Packaging | Bulk | Bulk | Bulk |
Current Rating | 40 uA | 40 uA | 40 uA |
Termination Style | Solder Pad | Solder Pad | Solder Pad |
Length | 7.87 mm | 7.87 mm | 7.87 mm |
Width | 5.54 mm | 5.54 mm | 5.54 mm |
Impedance | 3.5 kOhm | 3.5 kOhm | 3.5 kOhm |
Termination | Solder Pads | Solder Pads | Solder Pads |
Voltage Rated | 1.3V | 1.3V | 1.3V |
Current Supply | 40μA | 40μA | 40μA |
Port Location | Side | Side | Side |
Size Dimension | 7.87mm L x 5.54mm W | 7.87mm L x 5.54mm W | 7.87mm L x 5.54mm W |
Output Type | Analog | Analog | Analog |
Direction | - | - | - |
Frequency Range | 100Hz ~ 4.2kHz | 100Hz ~ 4.2kHz | 100Hz ~ 4.7kHz |
Sensitivity | -60dB ±3dB @ 74dB SPL | -61.5dB ±1.5dB @ 74dB SPL | -59.5dB ±3dB @ 74dB SPL |
S N Ratio | - | - | - |
Seal Rating | None | None | None |
Height Max | 2.24mm | 2.24mm | 2.24mm |
Shape | Rectangular | Rectangular | Rectangular |
Operating Supply Voltage | 1.3 VDC | 1.3 VDC | 1.3 VDC |
Depth | 2.24 mm | 2.24 mm | 2.24 mm |
Length in | 0.31 in | 0.31 in | 0.31 in |
Length mm | 7.87 mm | 7.87 mm | 7.87 mm |
Width in | 0.218 in | 0.218 in | 0.218 in |
Width mm | 5.54 mm | 5.54 mm | 5.54 mm |
Directional Properties | - | Omnidirectional | Omnidirectional |