LP508 DATA SHEET FEATURES input referred noise operating range ty

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LP508 DATA SHEET FEATURES input referred noise operating range ty

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Class Amplifier with Independent Gain Blocks
LP508 DATA SHEET
FEATURES input referred noise operating range typical gain (adjustable) 0.28 range transducer current electrical distortion first second blocks coupled frequency response volume control range STANDARD PACKAGING MICROpac PLID
DESCRIPTION LP508 Class amplifier utilizing Gennum's proprietary voltage bipolar JFET technology. consists single ended, noise inverting gain blocks. first block typical open loop gain with closed loop gain ratio feedback resistor source impedance. second block output transistor bias which Typically, gain first block with second block giving total gain
microphone decoupling resistor, on-chip
RMIC
BLOCK DIAGRAM
Revision Date: June 2004
Document
GENNUM CORPORATION P.O. 489, Stn. Burlington, Ontario, Canada tel. (905) 632-2996 Site: www.gennum.com E-mail: hipinfo@gennum.com
ABSOLUTE MAXIMUM RATINGS
PARAMETER Supply Voltage Power Dissipation Operating Temperature Range Storage Temperature Range VALUE/UNITS -10°C -20°C
CONNECTION
CAUTION CLASS SENSITIVITY
ELECTRICAL CHARACTERISTICS
Conditions: Frequency kHz, Temperature 25°C, Supply Voltage
PARAMETER Gain (Closed Loop) Distortion Amplifier Current Transducer Current Transducer Current Input Referred Noise Stable with Battery Resistance Input Bias Current (pin Chip Emitter Resistor Emitter Bias Voltage (Pin Microphone Decoupling Resistor
SYMBOL IAMP TRANS TRANS
CONDITIONS VOUT=500mVRMS VOUT=500mVRMS IAMP= 27.5 dB/oct.
UNITS
RMIC
parameters switches remain shown Test Circuit unless otherwise stated "Conditions" column
IAMP
VB=1.3 4.75
IMIC 3.3K 1kHz
RMIC
VOUT RL=1K
ITRANS
=27.5 =100K
resistors ohms, capacitors unless otherwise stated
Fig. Test Circuit
RMIC
BASE CURRENT COMPENSATION
Patent No.154104
resistors ohms, capacitors unless otherwise stated
Fig. Functional Schematic
RMIC
3.9K 0.22
100K
Gain Stage 20Log10
Gain Stage 20Log10
impedance receivers, capacitor from required stability. resistors ohms, capacitors unless otherwise stated
Fig. Typical Hearing Circuit
100K 3.3K -130 -110
0.22µF
RELATIVE OUTPUT (dB)
0.1µF
OUTPUT (dBV)
0.047µF 0.033µF
20000
INPUT (dBV)
FREQUENCY (Hz)
Fig. Characteristics Various Values
Fig. Frequency Response Various Values
RELATIVE GAIN (dB)
GAIN (dB)
100K
SUPPLY VOLTAGE (VDC)
FREQUENCY (Hz)
Fig. Gain Supply Voltage
Fig. Preamplifier Open Loop Frequency Response
RELATIVE TRANSDUCER CURRENT (µA)
RELATIVE AMPLIFIER CURRENT (µA)
TEMPERATURE
TEMPERATURE (°C)
Fig. Amplifier Current Temperature
Fig. Transducer Current Temperature
GENNUM CORPORATION
MAILING ADDRESS: P.O. 489, Stn. Burlington, Ontario, Canada Tel. (905) 632-2996 (905) 632-2814 SHIPPING ADDRESS: Fraser Drive, Burlington, Ontario, Canada
DOCUMENT IDENTIFICATION: DATA SHEET product production. Gennum reserves right make changes time improve reliability, function design, order provide best product possible. REVISION NOTES: Updated standard packaging information
GENNUM JAPAN CORPORATION
Shinjuku Green Tower Building 6-14-1, Nishi Shinjuku Shinjuku-ku, Tokyo 160-0023 Japan Tel: (03) 3349-5501 Fax: (03) 3349-5505
Gennum Corporation assumes responsibility circuits described herein makes representations that they free from patent infringement. Copyright 1984 Gennum Corporation. rights reserved.
Printed Canada.

LP508 DATA SHEET FEATURES input referred noise operating range ty

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