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LV549 Datasheet(PDF) 1 Page - List of Unclassifed Manufacturers |
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1 / 5 page LC549/LV549/LD549 DATA SHEET High Power Class B Output Stage FEATURES • 40dB of electrical gain • 1.0 to 1.6 VDC supply operating range • current trim capability (R T ) • high efficiency class B output stage • may be used with a linear or compression preamplfier STANDARD PACKAGING • 8 pin MICROpac (LC549) • 8 pin MINIpac • 8 pin PLID® (LC549, LD549) • Chip (47 x 40 mils) (LC549, LD549) DESCRIPTION The LC/LV/LD549 is an 8 pin, low voltage, push-pull audio frequency output stage amplifier with a single unbalanced input. The circuit utilizes two internal negative feedback loops to stabilize the DC operating point for temperature stability and to linearize the transfer function over a wide dynamic range. The circuit operates near ideal class B conditions resulting in low distortion and very low quiescent current, required for extended battery life. The LC549, LV549 and LD549 differ in only one respect; the LV549 and LD549 are selected devices which are capable of delivering from 10 mA to 41 mA and from 36 mA to 75 mA of output current respectively. These values are the maximum current drawn with both output stage transistors in saturation. Thus the LD549 is capable of producing a high output in a low impedance load, the LV549 is selected to have lower peak currents, extending the life of the battery. U.S. Patent No. 4,085,382 Patented in other countries BLOCK DIAGRAM 4 3 2 7 1 6 5 8 RT VB OUTPUT 1 OUTPUT 2 INPUT DEC 1 DEC 2 GND GENNUM CORPORATION P.O. Box 489, Stn A, Burlington, Ontario, Canada L7R 3Y3 tel. (905) 632-2996 fax: (905) 632-5946 Japan Branch: A-302 Miyamae Village, 2-10-42 Miyamae, Suginami-ku Tokyo 168, Japan tel. (03) 3334-7700 fax: (03) 3247-8839 Document No. 500 - 25 - 09 Revision Date: January 2001 |
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