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ICL8048BCJE

Log Amplifier

Intersil 

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January 2004

ICL8048

FN2865.3

Log Amplifier

The ICL8048 is a monolithic logarithmic amplifier capable of

handling six decades of current input, or three decades of

voltage input. It is fully temperature compensated and is

nominally designed to provide 1V of output for each decade

change of input. For increased flexibility, the scale factor,

reference current and offset voltage are externally

adjustable.

Part Number Information

PART

ERROR TEMPERATURE

PKG.

NUMBER (25oC) RANGE (oC) PACKAGE NO.

ICL8048BCJE 30mV

0 to 70

16 Ld CERDIP F16.3

Pinout

ICL8048 (CERDIP)

TOP VIEW

GND 1

IIN 2

NC 3

A1 OFFSET

NULL

4

A1 OFFSET 5

NULL

V- 6

A1 OUTPUT 7

NC 8

16 IREF

15 GAIN

14 NC

13

A2 OFFSET

NULL

12 A2 OFFSET

NULL

11 V+

10 VOUT

9 NC

Features

• Full Scale Accuracy . . . . . . . . . . . . . . . . . . . . . . . . . 0.5%

• Temperature Compensated Operation . . . . . . 0oC to 70oC

• Scale Factor, Adjustable . . . . . . . . . . . . . . . . 1V/Decade

• Dynamic Current Range. . . . . . . . . . . . . . . . . . . . . 120dB

• Dynamic Voltage Range . . . . . . . . . . . . . . . . . . . . . 60dB

• Dual JFET Input Op Amps

Functional Diagram

ICL8048

fIN

VIN

2

GND 1

VREF

Q1

16

Q2

IREF

-

+

A1

A2

+

-

VOUT

10

7 15

GAIN

A1 OUTPUT

1

CAUTION: These devices are sensitive to electrostatic discharge; follow proper IC Handling Procedures.

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Copyright © Intersil Americas Inc. 2004. All Rights Reserved

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