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| Class A Output Stage with Input Biasing LE507 DATA SHEET FEATURES * 76 dB of gain * internal DC bias for I/P stage * applications include AF output stages, hearing aids and RF amplifiers * total harmonic distortion 1% (typical) STANDARD PACKAGING * 8 pin PLID (R) * 8 pin DIP For more application information refer to Information Note 520 - 30. DESCRIPTION The LE507 is a low voltage class A amplifier design, primarily for low voltage and low power use. The broad application include AF output stages, RF amplifiers and output stages of the hearing instruments. The circuit is comprised of three stages all of them having access to their collectors for frequency shaping, feedback, etc. The provision for the bias network and alternative gain increase to 76 dB are included on the circuit. VBIAS 2 (3) VB 1 (4) FILTER A 4 (1) FILTER B 8 (5) O/P 7 (6) I/P 5 (8) 3 (2) GND All external resistors in ohms, all capacitors in F unless otherwise stated. Numbers in brackets are for DIP package. 6 (7) RE BLOCK DIAGRAM Revision Date: January 2001 Document No. 500 - 52 - 09 GENNUM CORPORATION P.O. Box 489, Stn A, Burlington, Ontario, Canada L7R 3Y3 Japan Branch: A-302, M i yamae Vi l l age, 2-10-42 M i yamae, Suginami-ku, Tokyo 168, Japan tel. (905) 632-2996 fax: (905) 632-5946 tel. (03) 3334-7700 fax (03) 3247-8839 ABSOLUTE MAXIMUM RATINGS PARAMETER Supply Voltage Power Dissipation Operating Temperature Range Storage Temperature Range VALUE/UNITS 5 V DC 25 mW -10C to40 C -20C to 70 C PIN CONNECTION 4 5 I/P R E O/P FILTER A GND V BIAS V B 1 8 FILTER B CAUTION CLASS 1 ESD SENSITIVITY FILTER A GND V BIAS 1 8 I/P R E O/P DIP PACKAGE 4 5 ELECTRICAL CHARACTERISTICS o Supply voltage 1.3 VDC, ambient temperature 25 C Conditions are as per test circuit unless otherwise stated V B FILTER B PARAMETER Voltage Gain Total Harmonic Distortion Total Current Emitter Voltage SYMBOL VA T.H.D. ITotal VRE CONDITIONS Output level 0.5 VRMS Output level 0.5 VRMS MIN 28 1.05 27 TYP 30 1 1.3 34 MAX 32 2 1.6 41 UNITS dB % mA mV VB = 1.3 VDC 4 (1) 8 (5) 1 ITOT (4) 25 k 18 k 2 (3) 13.5 k 7 (6) HAMMOND 99966 1:1 VOUT RL 1k 33 k INPUT 100 k RS 600 680 3.3 k 2k 0.033 5 (8) 1 kHz 3 (2) 6 (7) VRE 27 -30 dB ATTENUATION All external resistors in ohms, all capacitors in F unless otherwise stated. Numbers in brackets are for DIP packages. Fig.1 Test Circuit 500 - 52 - 09 2 FILTER A 4 (1) FILTER B 8 (5) 1 (4) VB 25 k 18 k VBIAS 2 (3) 13.5 k 7 (6) 2k O/P I/P 5 (8) 3 (2) GND All external resistors in ohms, all capacitors in F unless otherwise stated. Numbers in brackets are for DIP packages. 6 (7) RE Fig. 2 Functional Schematic VB = 1.3 VDC + 10 33 k BK1606 OR EQUIVALENT RL =1 k 1 5 6 5 10 k VOLUME CONTROL 3 2 RS 3.5 k 2 4 0.1 0.1 LC506 1 LE507 6 3 7 2.2 GAIN TRIM + 33 10 k All external resistors in ohms, all capacitors in F unless otherwise stated. Fig. 3 LC506/LE507 Typical Hearing Aid Circuit DOCUMENT IDENTIFICATION PRODUCT PROPOSAL This data has been compiled for market investigation purposes only, and does not constitute an offer for sale. ADVANCE INFORMATION NOTE This product is in development phase and specifications are subject to change without notice. Gennum reserves the right to remove the product at any time. Listing the product does not constitute an offer for sale. PRELIMINARY DATA SHEET The product is in a development phase and specifications are subject to change without notice. REVISION NOTES Changes to standard packaging information DATA SHEET The product is in production. Gennum reserves the right to make changes at any time to improve reliability, function or design, in order to provide the best product possible. Gennum Corporation assumes no responsibility for the use of any circuits described herein and makes no representations that they are free from patent infringement. (c) Copyright 1983 Gennum Corporation. All rights reserved. Printed in Canada 3 500 - 52 - 09 |
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