DESCRIPTION

The MPA 003 is a high performance Electret Microphone assembled into a rugged, compact package. A matched compensation preamplifier is mounted at the connector end of the interconnecting cable. The preamplifier assures an essentially flat transducer response from 240 Hz to 4000 Hz, while providing approximately 20 dB of voltage gain. The enclosures are 100% metal construction, providing a high degree of shielding integrity.

Each assembly is 100% tested for conformance to the MIN./MAX. spec-ification limits at 25°C.

FEATURES

Low power consumption:
55µA (typ) at 4.5 VDC.

Low Output Impedance:
Suitable for driving up to 30 feet of cable.

Compact, fully shielded packaging, with microphone and preamp at opposite ends of an interconnecting cable.

Connectorized for ease of installation.

May be powered from unregulated battery supply.

ELECTRICAL SPECIFICATIONS, TA = 25°C, VS = 4.5 VOLTS DC
Parameter
Test Condition
Units
Min.
Typical
Max.
Transducer GainInput = 80 dB SPL at 1 kHz
dBV, RMS.
-36
-33
-30
Frequency Response Input = 80 dB SPL, 240 Hz to 4000 Hz. Reference = 1000 Hz
dB
-1
+1
SensitivityAcoustic Input Level adjusted to produce 7 dB SINAD at output at 1 kHz (measured in 240 Hz to 4000 Hz BW)
dB SPL
30
33
Dynamic RangeMax. Acoustic Input for THD 1%
dB SPL
100
Current DrainVS = 4.5 VDC

VS = 6.0 VDC

µA

µA
50
55

85
75
Output Impedance240 Hz to 4000 Hz
OHMS
5000
Output PedestalNo Input
VDC
0.55
Supply Voltage Threshold RL > 100 K; VS reduced until Transducer voltage drops 1 dB.
VDC
3.0
Supply Rejection240 Hz to 4000 Hz
dB
45

ABSOLUTE MAXIMUM RATINGS

ParameterAbsolute Maximum(1)
Supply Voltage+50 VDC, -0.3 VDC
Output Current(2) 10 mA
Acoustic Input130 dB SPL
Temperature-40°C to +85°C.
Humidity95%, Non - Condensing

(1) Operation of this device beyond any of these Absolute Maximum limits may cause permanent damage.

(2) The output is DC coupled. In normal operation, any load connection should be a high resistance or AC coupled.
Ordering Information:
Basic Part Number:MPA003
Dash Number (length)XXXX
60 inches Max.
Examples:
3.5 inch cableMPA003-0035
18 inch cableMPA003-0180
For Pricing and to Place an Order, contact:

PROBE Science, Inc. PO Box 70048 Pasadena, CA 91117-7048

1(626) 795-5785 (PH) 1(626) 795-4785 (FAX)