SPM0206HE3H Knowles Acoustics, SPM0206HE3H Datasheet - Page 6

• Manufacturer Part Number: SPM0206HE3H
• Description: Microphone
• Manufacturer: Knowles Acoustics

Specifications of SPM0206HE3H

• Transducer Function: Microphone
• Device Type: Microphone
• Directivity: Omni
• Connector Type: SMD
• Length: 4.72mm
• Supply Voltage: 5.5V
• Supply Voltage Max: 5.5V
• Supply Voltage Min: 1.5V
• Lead Free Status / RoHS Status: Lead free / RoHS Compliant

Note: Customer is recommended to use DC-blocking capacitor to each output line (terminal 1 & 2) to guard
against DC mismatch during start-up.
Se t t ing Ga in For m ula s:
Gain of non- invert ing different ial Op- Am p is det erm ined as:
High- pass- filt er Cor ner Frequency:
D e sir e d Ga in
Unit y Gain ( 0dB)
14dB Gain
Adj ust able Gain
9. RECOMMENDED INTERFACE CIRCUIT
G= ( 1 + { R1 / ( R2 + R3) } )
C.F. = 1 / { 2* pi* ( R2 + R3) * C1}
a division of Knowles Elect r onics, LLC.
Pin 3 Te r m in a t ion M e t h od
Tie Term inal 3 ( Gain Cont rol) direct ly t o Out put + ( Term inal 1) .
Tie Term inal 3 ( Gain Cont rol) t hrough C1 ( 0.47uF) t o Ground.
Add R3 and C1. Use form ulas provided to calculat e gain and high-
pass crossover frequency, or cont act Knowles for support .
6 - Vdd
4 - Ground
Knowles Acoust ics,
Gain( dB) = 20 * log( G)
R2 = 2.44k
+
-
C1 (set by customer)
3- Gain Control
R3 (set by customer)
SPM0206HE3
R1 = 9.8K
Revision: F
2 - Output-
(see note)
1 - Output+
(see note)
6 of 10