1890 Adafruit

SPECIFICATION SHEET FOR APPROVAL MULTI-FUNCTIONAL TRANSDUCER (2 MODES: RECEIVER & SPEAKER) CUSTOMER: MODEL NUMBER: M2850-8B-0L03R 28mm 8 0.5W CUSTOMER PART NUMBER: DESIGNED CHECKED APPROVED SIGNATURE AricZhu 2011-7-5 2011-7-5 DATE CUSTOMER CONFIRMATION SIGNATURE: DATE: P2/5 SPECIFICATION MODEL NO. M2850-8B-0L03R UPDATE V00 ISSUED DATE 2011-7-5 SCOPE This specication cover our product of mylar speaker unit for use in 1 DVD, telephone, alarm system and calling system. ELECTRICAL ANDACOUSTICAL CHARACTERISTIC 2 1 SOUND PRESSURE LEVEL (S.P.L)2 1 SOUND PRESSURE LEVEL (S.P.L) 2 Sound pressure level shall be indicated by the mean value of those measured at the specied frequency range. 933 dB at 1200 150018002000 Hz in average. Measure Condition: sin swept measurement at 0.1W on axis at 0.1M Measurement Circuit: shown in Fig. 2. 22 RESONANCE FREQUENCY(FO):68020%Hz at 1V.(NO Bafe ) Measurement Circuit:Shown in Fig.2. 23 RATED IMPEDANCE: 820% (at 1KHz, 1V) Measure Condition:the impedance response is measured with Mylar speaker. Measurement Circuit: shown in Fig. 2. 24 FREQUENCY RANGE: Fo~10KHz (Deviation 10dB from average S.P.L.) Frequency Response Curve:Shown in Fig.3.Whit IEC Bafe plate. Frequency Response Measurement Circuit: Shown in Fig.2. 25 RATED INPUT POWER (CONTINUUM): 0.25W 26 MAX INPUT POWER (SHORT-TERM): 0.5W Testing will be done using IEC lter with white noise source for 1 minute with no degradation in performance. 27 TOTAL HARMONIC DISTORTION: Less than 5% at 1KHz,0.25W Measurement Circuit:Shown in Fig.2. 28 OPERATION: Must be normal at sine wave and program source 0.5W POLARITY: When a positive DC current is applied to the terminal 29 8 0.5W marked(+),Diaphragm shall move forward. Marking: 210 PURE SOUND DETECTION: Buzz,Rattle,etc Should not be audible at 2.8 VRMS sine wave from Fo ~ 7KHz. NO DATE UPDATE DESIGNED CHECKED APPROVED 1 AricZhu 2 SPECIFICATION P3/5 MODEL NO. M2850-8B-0L03R UPDATE V00 ISSUED DATE 2011-7-5 3. DIMENSIONS (Fig.1) Unless otherwise specied, tolerance: 0.3 (unit: mm)