Datasheet > LD502-PLID

LD502-PLID

更新时间： 2024-10-20 04:59:35

品牌	Logo	应用领域
GENNUM		光电二极管
页数	文件大小	规格书
4页	147K
描述
Audio Amplifier, PDSO8, PLID, 8 PIN

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数据手册

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LD502-PLID 数据手册

Low Distortion AGC

Compression Amplifier

LD502 DATA SHEET

DESCRIPTION

FEATURES

• adjustable gain from 0 to 60 dB

• 0.94 V DC voltage regulator on-chip

• attack time fixed at less than 1 ms

• release time adjustable from 40 to 500 ms

• low input referred noise 1.2 µV

• <1 % distortion at 10 mVRMS output

• operates from 1.05 to 3 VDC

The LD502 is a compression (AGC) preamplifier that consists

of a single ended input inverting amplifier, with an internal

current controlled resistance connected between input and

output.

By using R_GT(see test circuit) to vary the value of this current

controlled resistance, the amplifier gain and compression

threshold can be controlled over a range of 60 dB.

The AGC current is derived from a full wave rectifier driven by

a differential amplifier. The attack time of the AGC circuit is

fixed at less than 1 ms. The release time is adjustable from

40 to 500 ms by selecting the value of an external capacitor

(C3).

STANDARD PACKAGING

• 8 pin MICROpac

• 8 pin MINIpac

• 8 pin PLID ^®

• 8 pin SLT

Internally, a series shunt voltage regulator produces a 0.94 V

DC regulated output voltage. This provides a bias for electret

microphones and permits circuit operations over a wide range

of supply voltages, 1.05 to 3 VDC for LD502 without any

degradation of electrical performances.

• Chip (64 x 62 mils)

Au Bump

V_B

GAIN SET

VOLTAGE

REGULATOR

V_REG

A OUT

AMPLIFIER

A IN

FULL WAVE

RECTIFIER

AGC IN

AGC FILTER

GND

BLOCK DIAGRAM

Patented 1985

Canada 1183580

Patent Pending Europe 83.300836.0

USA 4506169 Japan 58-06886

Revision Date: March 1994

Document No. 500 - 43 - 18

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 Mi yamae, Suginami–ku, Tokyo 168, Japan tel. (03) 3334-7700 fax (03) 3247-8839

12 3 4

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