LC508 Ver la hoja de datos (PDF) - Gennum -> Semtech

Número de pieza

componentes Descripción

Fabricante

LC508

Class A Amplifier with 3 Independent Gain Blocks

Gennum -> Semtech 

FEATURES

• 1 µV input referred noise

• 1.0 to 5 VDC operating range

• 73 dB typical gain (adjustable)

• 0.28 to 2.0 mA range of transducer current

• 1% electrical distortion

• the first and second blocks, or second and third

blocks can be DC coupled

• 100 Hz to 50 kHz frequency response

• suitable for active filtering

STANDARD PACKAGING

• 10 PIN MICROpac

•10 pin PLID®

• 10 pin SLT

• Chip (52 x 49 mils)

Class A Amplifier with 3

Independent Gain Blocks

LC508 DATA SHEET

DESCRIPTION

The LC508 is a 10 pin Class A amplifier utilizing Gennum's

proprietary low voltage bipolar JFET technology. It consists of

3 single ended, low noise inverting gain blocks. The first two

blocks have a typical open loop gain of 50 dB. The closed loop

gain is set by the ratio of the feedback resistor to the source

impedance. The third block is an open collector output stage

with the bias being set by RE and VRE at pin 8 which is 54 mV.

Typically, the gain of the first two blocks is set to 25 dB each,

with the third block at 23 dB, giving a total gain of 73 dB.

Gain trim can be accomplished with the use of a feedback

resistor on the first block, while the volume control is used as

the feedback control on the second block. This gives a volume

control range greater than 40 dB.

5 RMIC

V

MIC

A IN 4 - A

-B

VB

6

7

-C

C OUT

8 RE

RE

2

3

A OUT B IN

10 9

B OUT C IN

BLOCK DIAGRAM

1

GND

Revision Date: January 2001

Document No. 500 - 61 - 12

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: hipinfo@gennum.com

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