Log Amplifier
ICL8048
Data Sheet August 1999 File Number 2865.2
Log Amplifier
The ICL8048 is a monolithic logarithmic amplifier capable...
Description
ICL8048
Data Sheet August 1999 File Number 2865.2
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.
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
PKG. NO.
Ordering Information
PART NUMBER ICL8048BCJE ERROR TEMPERATURE (25oC) RANGE (oC) 30mV 0 to 70 PACKAGE
Functional Diagram
ICL8048
VREF Q1 Q2 16 IREF
16 Ld CERDIP F16.3
Pinout
ICL8048 (CERDIP) TOP VIEW
VIN
fIN 2 GND 1
A1 +
+ A2
VOUT 10
-
GND IIN NC A1 OFFSET NULL A1 OFFSET NULL VA1 OUTPUT NC
1 2 3 4 5 6 7 8
16 IREF 15 GAIN 14 NC A2 OFFSET NULL 12 A2 OFFSET NULL 11 V+ 13 10 VOUT 9 NC 7 A1 OUTPUT 15 GAIN
1
CAUTION: These devices are sensitive to electrostatic discharge; follow proper IC Handling Procedures. 1-888-INTERSIL or 321-724-7143 | Copyright © Intersil Corporation 1999
ICL8048
Absolute Maximum Ratings
Supply Voltage . . . . . . . . . . . . . . . . . . ...
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