Datenblatt-Suchmaschine für elektronische Bauteile |
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I1806S Datenblatt(PDF) 7 Page - Winbond |
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I1806S Datenblatt(HTML) 7 Page - Winbond |
7 / 26 page I1800 SERIES PIN NAME PIN NO. I/O FUNCTION MIC 10 I Microphone Input: The microphone input transfers its signals to the on-chip preamplifier. An on-chip Automatic Gain Control (AGC) circuit controls the gain of the preamplifier. An external microphone should be AC coupled to this pin via a series capacitor. The capacitor value, together with an internal 10 KΩ resistance on this pin, determines the low-frequency cutoff for the I1800 passband. MIC REF 12 I Microphone Reference: The MIC REF input is the inverting input to the microphone preamplifier. This provides input noise-cancellation, or common-mode rejection, when the microphone is connected differentially to the device. AGC 13 I Automatic Gain Control: The AGC dynamically adjusts the gain of the preamplifier to compensate for the wide range of microphone input levels. The AGC allows the full range of sound, from whispers to loud sounds, to be recorded with minimal distortion. Nominal values of 4.7 µF give satisfactory results in most cases. SP-/SP+ 15, 17 O Speaker Outputs: The SP+ and SP- pins provide direct drive for loudspeakers with impedances as low as 8Ω. A single output may be used, but, for direct-drive loud-speakers, the two opposite- polarity outputs provide an improvement in output power of up to four times over a single-ended connection. Furthermore, when SP+ and SP- are used, a speaker coupling capacitor is not required. A single-ended connection will require an AC-coupling capacitor between the SP pin and the speaker. The SP+ pin and the SP- pin are internally connected through a 50 KΩ resistance. When not in playback mode, they are floating. VCCA, VCCD 18, 27 Voltage Supplies: Analog and digital circuits internal to the I1800 device use separate power buses to minimize noise on the chip. These power buses are brought out to separate pins on the package and should be tied together as close to the power supply as possible. It is important that the power supply be decoupled as close as possible to the package. Publication Release Date: May 2003 - 7 - Revision 0.0 |
Ähnliche Teilenummer - I1806S |
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Ähnliche Beschreibung - I1806S |
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