LP508

www.DataSheet4U.com Class A Amplifier with 2 Independent Gain Blocks LP508 DATA SHEET FEATURES 1 µV input referred noise 1.0 to 5 VDC operating range 61 dB typical gain (adjustable) 0.28 to 2.0 mA range of transducer current 1 % electrical distortion the first and second blocks can be DC coupled 4.0 kΩ microphone decoupling resistor, on-chip 100 Hz to 50 kHz frequency response volume control range >40 dB STANDARD PACKAGING 8 pin MICROpac 8 pin PLID ® 8 pin SLT Chip (59 x 53 mils) Au Bump DESCRIPTION The LP508 is an 8 pin Class A amplifier utilizing Gennum's proprietary low voltage bipolar JFET technology. It consists of 2 single ended, low noise inverting gain blocks. The first block has a typical open loop gain of 50 dB, with the closed loop gain set by the ratio of the feedback resistor to the the source impedance. The second block has the output transistor bias set by RE and VRE at pin 7 which is 27 mV. Typically, the gain of the first block is set to 29 dB, with the second block at 32 dB, giving a total gain of 61 dB. e DataShe DataSheet4U.com VB 5 VMIC 4 RMIC 18K 3 A IN 6 - A - B 7 RE 1 A OUT 8 B IN 2 GND B OUT RE BLOCK DIAGRAM DataSheet4U.com Revision Date: January 2001 Document No. 500 - 71 - 9 GENNUM CORPORATION P.O. Box 489, Stn. A, Burlington, Ontario, Canada L7R 3Y3 tel. +1 (905) 632-2996 Web Site: www.gennum.com E-mail: [email protected] www.DataSheet4U.com ABSOLUTE MAXIMUM RATINGS PARAMETER Supply Voltage Power Dissipation...