XMA202 1/2-inch Preamplifier with High-Pass Filter
XMA202 is
1/2-inch ICCP power supply preamplifier developed by BSWA, which is suitable
for MP series 1/2-inch pre-polarized microphones. It is a general preamplifier
that can be used in a variety of acoustic applications.
The main function of the preamplifier is
impedance change, since the output impedance of the microphone is above GΩ, it
cannot be directly connected to the common data acquisition equipment. The high
input impedance and low output impedance of the preamplifier can reduce the
output impedance of the microphone to less than 100 Ω.
XMA202 reduces
the input impedance to 1.5 GΩ, making it more suitable for conventional
measurement environments. Unlike laboratory settings, conventional test
environments are often accompanied by low-frequency noise, which may interfere
with the DC bias of the ICCP-powered preamplifier and thereby affect
measurement accuracy. The capacitance of the microphone and the input impedance
of the preamplifier are working together to form a first-order low-pass filter,
filter the low-frequency noise effectively.
XMA202 does
not provide polarization voltage, so it is only applicable to pre-polarized
microphone. The power supply mode named ICCP (Integrated constant current
power) can operate on a constant current power supply and give output signals
in the form of voltage modulation on the coaxial cable. This kind of power
supply mode can keep a very low signal attenuation even using a long cable. The
MC1xx series power supply conditioner is required.
XMA202 can
choose to supply with TEDS to support read microphone information directly by
data acquisition equipment, including microphone model, serial number,
sensitivity, etc. BSWA TEDS microphone supports the IEEE 1451.4 standard. The
version of 0.9 is used by default to be compatible with more data acquisition
equipment. The version of 1.0 can also be selected according to user’s
requirements.
Features:
● Suitable for 1/2-inch
pre-polarized microphone
● ICCP power supply
preamplifier
● Frequency response: 40 Hz ~ 100 kHz (±0.2 dB)
● Attenuation: 0.2 dB
(typ.)
● Connector: BNC
● Optional TEDS
(IEEE.1451.4)
Applications:
● General purpose
acoustic measurements
● Environmental,
industrial, traffic and other acoustic measurement
Specifications:
| Diameter | 1/2" | |
|---|---|---|
| Polarization Voltage Support | 0V (Prepolarized) | |
| Frequency Response (Hz) |
40 ~ 100 k (±0.2 dB) 10 Hz to 100 kHz (+0.2 dB/-2 dB) |
|
| Attenuation (dB) | 0.2 (typ.) | |
| Maximum Output Voltage (Vp) | ±8 | |
| Self-generated Noise | A-weighted | < 3.5 μV (2.8 μV typ.) |
| 20 Hz ~ 20 kHz | < 23 μV (13.5 μV typ.) | |
| Input Impedance (GΩ || pF) | 1.5 || 0.4 | |
| Output Impedance (Ω) | <30 (26 typ.) | |
| Power Supply | ICCP (2mA ~ 20mA, 4mA typ.) | |
| DC Bias Voltage (V) | 12±2 | |
| Operating Temperature Range (°C) | -30 ~ 80 | |
| Operating Humidity Range (%RH) | 0 ~ 95 | |
| Dimensions (mm) | Ø12.7 × 70.3 | |
| Mounting Thread for Microphone | 11.7 mm-60 UNS | |
| Output Connector | BNC | |
| Weight (g) | 25.1 | |
| TEDS | Optional, IEEE 1451.4 compliant (default v0.9, optional v1.0) | |
|
Note: Unless specified otherwise, all values were measured at 23 °C, 101.3 kPa, 50 %RH by using 1 meters coaxial cable, 4 mA / 24 V power supply and microphone capacitance of 15 pF. |
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Download information:
XMA202 1/2-inch Preamplifier with High-Pass Filter Brief
