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July 1999
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8
1-88
ICL8049
Antilog Amplifier
Description
The ICL8049 is a monolithic antilogarithmic amplifier that is
fully temperature compensated and is nominally designed to
provide 1 decade of output voltage for each 1V change of
input voltage. For increased flexibility, the scale factor, refer-
ence current and offset voltage are externally adjustable.
鈥?Full Scale Accuracy . . . . . . . . . . . . . . . . . . . . . . . . . 0.5%
鈥?Temperature Compensated Operation . . . . 0
o
C to 70
o
C
鈥?Scale Factor, Adjustable . . . . . . . . . . . . . . . . 1V/Decade
鈥?Dynamic Voltage Range . . . . . . . . . . . . . . . . . . . . .60dB
鈥?Dual JFET Input Op Amps
Part Number Information
PART NUMBER
ICL8049BCJE
ICL8049CCJE
ERROR (25
o
C)
10mV
25mV
TEMPERATURE RANGE (
o
C)
0 to 70
0 to 70
PACKAGE
16 Ld CERDIP
16 Ld CERDIP
Pinout
ICL8049 (CERDIP)
TOP VIEW
A
1
INPUT
GAIN
I
REF
A
1
OFFSET
NULL
A
1
OFFSET
NULL
V-
A
1
OUTPUT
NC
1
2
3
4
5
6
7
8
16 V
IN
15 GND
14 A
2
INPUT
A
2
OFFSET
NULL
12 A
2
OFFSET
NULL
11 V+
13
10 V
OUT
9 NC
Functional Diagram
ICL8049
V
REF
3
I
REF
A
2
INPUT
Q
1
Q
2
14
f
OUT
V
IN
16
GAIN
2
-
A
1
+
1
A
1
INPUT
7
A
1
OUTPUT
15
GND
-
A
2
+
10
V
OUT
CAUTION: These devices are sensitive to electrostatic discharge; follow proper IC Handling Procedures.
1-888-INTERSIL or 321-724-7143
|
Intersil (and design) is a registered trademark of Intersil Americas Inc.
Copyright 漏 Intersil Americas Inc. 2002. All Rights Reserved
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File Number
4768
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